4/26/23, 10:11 AM ABS Description and Operation

2022 Buick Encore GX | | Brakes | Antilock Brake System |

Encore GX Service Manual N America 14739426
Description and Operation | Document ID: 5073631

ABS Description and Operation

Description and Operation

This vehicle is equipped with a Integrated Brake Control (IBC), also known as Brake System
Control Module.

The Integrated Brake Control is an electromechanical device that interprets and converts driver
input and provides a corresponding hydraulic pressure output to activate a standard brake system
according to the drivers demand. The electro-hydraulic boost system replaces the conventional
vacuum-based power assist brake system, which provides an advantage in efficiency. The electro-
hydraulic brake system supplies "on-demand" power when the driver presses the brake pedal. In
an event of no electrical energy or failure condition the drivers input is mechanically converted to
a hydraulic pressure output.

Depending on options, the following vehicle performance enhancement systems are provided.

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ABS
Traction Control
Stability Control
Brake Pad Life Monitoring
Dynamic Rear Proportioning
Panic Brake Assist
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Teen Mode Support
Trailer Sway Control
Engine Drag Control
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Brake Drying/Cleaning
Extended Hill Hold Start Assist
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Hill Descent Control

Collision Imminent Braking
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Full Speed Range Adaptive Cruise Control Braking

Trailer Brake Control
Park Brake Control Motor on Caliper/Drum ( with Push/Push)
Bi-directional WSS
CAN messages:
Chassis System Total Brake Axle Torque
DIC message during ABS ( no pedal feedback)
Switch based ESC disable
Switch based Traction disable
ESC enable
The Body control module (BCM) monitors the brake pedal position sensor signal when the
brake pedal is applied and sends a high speed serial data message to the Brake System
Control Module indicating the brake pedal position.
Instrument cluster - The instrument cluster displays the vehicle speed based on the
information from the engine control module. The engine control module sends the vehicle
speed information ©
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a high speedMotors.
General serial data
All to the reserved.
rights body control module. The body control

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4/26/23, 10:11 AM ABS Description and Operation

module then sends the vehicle speed information via a low speed serial data to the
instrument cluster in order to display the vehicle speed, either in kilometers or miles, based
on the vehicle requirements.
Multi-axis acceleration sensor - The yaw rate, lateral acceleration and longitudinal
acceleration sensors are combined into one multi-axis acceleration sensor, internal to the
inflatable restraint sensing and diagnostic module. The Brake System Control Module
receives serial data message inputs from the yaw rate, lateral acceleration and longitudinal
acceleration sensor and activates stability control and hill hold start assist function
depending on multi-axis acceleration sensor input.
Multifunction switch - The traction control switch is a multifunction momentary switch. The
body control module monitors the signal circuit from the traction control switch and sends a
high speed serial data message to the Brake System Control Module indicating the switch
position. The traction control and stability control are manually disabled or enabled by
pressing the traction control switch.
Steering wheel angle sensor - The Brake System Control Module receives serial data
message inputs from the steering angle sensor. The steering wheel angle sensor signal is
used to calculate the intended driving direction. The steering wheel angle sensor is located
somewhere along the steering shaft assembly.
Transmission control module - The Brake System Control Module receives high speed serial

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data message inputs from the transmission control module indicating the gear position of
the transmission for hill start assist or hill hold functions.
Wheel speed sensors – This vehicle is equipped with unique directional wheel speed sensors
that can detect wheel direction as well as zero wheel speed. The wheel speed sensors are
Active sensors that receive a 12 V power supply voltage from the Brake System Control
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Module and provides an output signal to the module. As the wheel spins, the wheel speed
sensor sends the Brake System Control Module a DC square wave signal. The Brake System
Control Module uses the frequency of the square wave signal to calculate the wheel speed
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Power-Up-Self Test

The Brake System Control Module is able to detect many malfunctions whenever the ignition is
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ON. However, certain failures cannot be detected unless active diagnostic tests are performed on
the components. Shorted solenoid coil or motor windings, for example, cannot be detected until
the components are commanded ON by the Brake System Control Module. Therefore, a power-up
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self-test is performed to verify correct operation of system components. The Brake System
Control Module performs the first phase of the power-up self-test when the ignition is first turned
ON. This phase consists of internal self-testing of the Brake System Control Module along with
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electrical checks of system sensors and circuits.

Antilock Brake System (ABS) Features

The active control/modulation of brake fluid hydraulic pressure to the front and/or rear brake
corner subsystems (brake torque control) to preclude wheel lock-up and enhance tire-to-road
longitudinal braking traction. Wheel lock-up (sliding wheel, not rolling wheel) occurs when the
wheel brake torque exceeds the available tire-to-road traction. Avoidance of wheel lock-up
provides the driver with the ability to maintain vehicle stability and steer-ability. Improved tire-to-
road longitudinal braking traction minimizes vehicle stopping distance.

Brake Assist Features

The Brake Assist provides additional brake pressure over the pressure provided by the
conventional brake apply system.

Panic Brake Assist

This feature will apply brakes more quickly when a panic brake situation is determined. Panic
Brake Assist detects that the driver intent is to stop the vehicle as quickly as possible, but does
not apply sufficient brake pressure to do so. The feature will detect the driver intent then actively
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4/26/23, 10:11 AM ABS Description and Operation

apply brake pressure to maximum pressure, thus activating the ABS system and stopping the
vehicle as quickly as possible.

Hydraulic Fade Compensation

Based on a brake disc/pad temperature estimate, driver applied master cylinder pressure and
vehicle deceleration rate, Hydraulic Fade Compensation will increase brake system pressure above
driver applied brake pressure when the brake system determines a gross fade condition.

The goal of providing additional brake system pressure is to reduce stopping distance during high
deceleration requests from the driver. The driver will experience fading brakes while using low or
medium brake pedal force application. The Hydraulic Fade Compensation will only activate during
high brake pedal force application.

Rear Brake Boost

The Rear Brake Boost function provides rear hydraulic brake assist to ensure that all four corners
are achieving maximum braking during ABS. When vehicle loading is heavily rear axle biased the
rear brakes may not utilize all of the available road adhesion. The hydraulic Rear Brake Boost
feature is designed to provide additional pressure to the rear brakes when the front brakes ABS
are activated and the rear wheels have low slip.

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Electronic Pre-Fill

This feature is used to reduce the brake response time when the driver quickly releases the
accelerator pedal. This will also be used to support the use of low drag calipers.

Electronic Stability Control (ESC) Features

Roll Over Mitigation / Preemptive ESC

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Using the standard ESC sensor set, Roll Over Mitigation will detect driving situations that could
cause a vehicle rollover. After detection, ESC brake control will be modified to reduce the chance
of vehicle rollover.
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Torque Vectoring by Brakes

Torque Vectoring by Brakes enhances vehicle agility by using active brake applies and engine
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torque requests to maximize traction on drive wheels. While cornering, brakes are applied to the
inside drive wheels, thus allowing more torque to the outside wheels without slipping the inside
wheels. Increasing the engine torque, above driver request, gives more torque to outer wheels.
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Torque Vectoring by Brakes is designed for all around performance, while this feature is solely
designed for high cornering maneuvers.

Flat Tire ESC Enable ( UJM)

If flat tire is detected, ESC system shall not be allowed to be disabled by the driver (ESC shall be
re-enabled if driver has already disabled). The traction control system will be allowed to be
disabled by the driver.

Traction Control System (TCS) Features

Vehicle Stuck Control

The traction control system shall recognize a vehicle “stuck” condition by monitoring excessive
wheel slip for greater than 5 seconds with a vehicle reference velocity of less than 3 kph. Once
detected, TCS will allow additional wheel slip of 5% to “dig” the vehicle out. This feature does not
guarantee the vehicle to get unstuck, only to assist the driver.

Power Hop Control

Power hop is defined as an oscillation of the driven wheels due to acceleration on high coefficient
© 2023causes
surfaces. This wheel oscillation General Motors.
the vehicle All
to rights
bouncereserved.
resulting in driver discomfort, failure

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4/26/23, 10:11 AM ABS Description and Operation

of driveline components and potentially other damage to the vehicle. This feature will be detected
using Wheel speed sensor signal when TCS is “ ON”. In case TCS is “ OFF”, Brake System Control
Module and ECM will be required to mitigate power hop. If the vehicle is exhibiting this signature,
the traction control system will attenuate power hop by reducing engine torque and applying
brake pressure.

Engine Drag Control

This feature is designed to mitigate drop-throttle-oversteer/understeer.

This feature will slowly reduce the engine torque in order to maintain vehicle stability.

The Enabling Conditions include: Engine is required to be running, Clutch is released for Manual
Trans , Vehicle speed is above 18kph (12mph) and the Powertrain is engaged through fault
message from ECM/TCM/PCM

Brake System Control Module Features

Engine Torque Steer Control

Engine torque steer control uses steering wheel angle, vehicle speed, accelerator pedal position,
accelerator pedal position rate, and engine speed as input parameters to control engine torque as

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preventive measure to avoid creating torque steer in the vehicle. If the actual engine torque
exceeds the maximum allowed engine torque, the Brake System Control Module shall command
the maximum allowed engine torque to the powertrain control module in same manner as if
requesting engine torque during traction control event.

Brake Drying/Cleaning .c
Brake Drying/Cleaning autonomously applies a small amount of brake pressure during long driving
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on wet roads in order to remove water from the rotor surface. The brake application is
unperceivable to the driver, but should result in improved brake feel and performance. Conditions
to enable Brake Drying/Cleaning.
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Wipers need to be ON
If Cruise is Active, Brake Drying/Cleaning will not function as minimum pedal position is
required
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If driver brakes, the distance counter will be reset

Brake pressure need to build up to 3 bar at all 4 wheels
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Hill Start Assist

Hill Start Assist is a feature that will temporarily hold the vehicle while on a grade. This feature
will hold the vehicle 2-5 seconds after the driver has removed their foot from brake pedal and the
vehicle is on a grade exceeding 5%. The design is to prevent the vehicle from rolling down the hill
before the driver has an opportunity to apply accelerator pedal.

Driveline Damping

Driveline Damping is required on vehicles with ESC, Stop/Start functionality and an automatic
transmission. This feature holds brake pressure to dampen driveline acceleration disturbance as
engine is restarted and holds brake pressure to retard or prevent the vehicle from rolling. It is
used for driver comfort and has also been used to extend vehicle hold on a steep grade.

Extended Hold Hill Start Assist

Extended Hold Hill Start Assist will function the same as Hill Start Assist except there will be an
indefinite vehicle hold instead of a temporary vehicle hold. The vehicle will be held by the Brake
System Control Module, and then will transfer the hold to Electronic Park Brake when necessary.
All of the driver exit strategies of Hill Start Assist with Electronic Park Brake will also apply to this
feature. © 2023 General Motors. All rights reserved.

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4/26/23, 10:11 AM ABS Description and Operation

Compact Spare Tire Detection

This feature will detect when a compact spare tire has been installed on a vehicle. This feature is
required on vehicles with compact spare tires.

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4/26/23, 11:03 AM ABS Indicator Malfunction

2022 Buick Encore GX | | Brakes | Antilock Brake System |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 4781244

ABS Indicator Malfunction

Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

Circuit/System Description

For an overview of the component/system, refer to: ABS Description and Operation

Circuit Description

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The output circuit is switched from ground to 12 V to
B+ — Terminal 1
activate the component.

Low Reference Grounded through the control module.

Reference Information
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Schematic Reference

Antilock Brake System Schematics

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Connector End View Reference

Master Electrical Component List

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Electrical Information Reference

Circuit Testing
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Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs

Scan Tool Reference

Control Module References

Circuit/System Verification

1. Ignition » On / Vehicle » In Service Mode

2. Verify that no DTCs are set.
⇒ If any of the DTCs are set
Refer to: Diagnostic Trouble Code (DTC) List - Vehicle
⇓ If no DTC is set
3. Perform the scan tool control function: All Indicators Command » ON
⇒ ABS Indicator Control = OFF
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4/26/23, 11:03 AM ABS Indicator Malfunction

Replace the component: P16 Instrument Cluster

⇓ ABS Indicator Control = ON
4. Ignition » On / Vehicle » In Service Mode
5. Verify the indicator status: ABS Warning Indicator = ON — For 5 s
⇒ ABS Warning Indicator ≠ OFF
Replace the component: K17 Electronic Brake Control Module or K160 Brake System Control
Module
⇓ ABS Warning Indicator = OFF
6. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
Verification

For control module replacement, programming, and setup refer to: Control Module References

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4/26/23, 11:13 AM Adhesives, Fluids, Lubricants, and Sealers

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Hydraulic Brakes | Specifications |
Document ID: 5375645

Adhesives, Fluids, Lubricants, and Sealers

Adhesives, Fluids, Lubricants, and Sealers

GM Part Number

Type of United
Canada
Application Material States

DOT 4 Motor
Hydraulic Brake System Vehicle Brake 19299570 19299571
Fluid

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4/26/23, 11:05 AM Adhesives, Fluids, Lubricants, and Sealers

2022 Buick Encore GX | |

Encore GX Service Manual N America 14739426 Brakes | Disc Brakes | Specifications |
Document ID: 5375644

Adhesives, Fluids, Lubricants, and Sealers

Adhesives, Fluids, Lubricants, and Sealers

GM Part Number

Type of United
Canada
Application Material States

DOT 4 Motor
Hydraulic Brake System Vehicle Brake 19299570 19299571
Fluid

Front Disc Brake Pad Retaining Spring Grease 19356408 19354609

Thread

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Front Brake Caliper Bracket Bolt Locking 19369733 10953488
Adhesive

Thread
Rear Brake Caliper Bracket Bolt .c Locking
Adhesive
19369733 10953488
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4/26/23, 10:45 AM Antilock Brake System Automated Bleed

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Antilock Brake System | Repair Instructions |
Document ID: 5210553

Antilock Brake System Automated Bleed

Warning: Refer to Brake Fluid Irritant Warning.

Caution: Refer to Brake Fluid Effects on Paint and Electrical Components Caution.

Note: Before performing the ABS Automated Bleed Procedure, first perform a pressure bleed of the
base brake system. Hydraulic Brake System Bleeding The automated bleed procedure is
recommended when one of the following conditions exist:

Base brake system bleeding does not achieve the desired pedal height or feel
Extreme loss of brake fluid has occurred
Air ingestion is suspected in the secondary circuits of the brake modulator assembly

The ABS Automated Bleed Procedure uses a scan tool to cycle the system solenoid valves and run the
pump in order to purge any air from the secondary circuits. These circuits are normally closed off, and

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are only opened during system initialization at vehicle start up and during ABS operation. The
automated bleed procedure opens these secondary circuits and allows any air trapped in these circuits
to flow out toward the brake corners.

Performing the Automated Bleed Procedure

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Caution: The Auto Bleed Procedure may be terminated at any time during the process by pressing
the EXIT button. No further Scan Tool prompts pertaining to the Auto Bleed procedure will
be given. After exiting the bleed procedure, relieve bleed pressure and disconnect bleed
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equipment per manufacturers instructions. Failure to properly relieve pressure may result
in spilled brake fluid causing damage to components and painted surfaces.
1. Raise and support the vehicle. Lifting and Jacking the Vehicle
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2. Remove all four tire and wheel assemblies. Tire and Wheel Removal and Installation
3. Inspect the brake system for leaks and visual damage. Repair or replace components as needed.
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4. Lower the vehicle.

5. Inspect the battery state of charge.
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6. Install a scan tool.

7. Turn the ignition ON, with the engine OFF.
8. With the scan tool, establish communications with the ABS system. Select Control Functions. Select
Automated Bleed from the Control Functions menu.
9. Raise and support the vehicle. Lifting and Jacking the Vehicle
10. Following the directions given on the scan tool, pressure bleed the base brake system. Hydraulic
Brake System Bleeding
11. Follow the scan tool directions until the desired brake pedal height is achieved.
12. If the bleed procedure is aborted, a malfunction exists. Perform the following steps before resuming
the bleed procedure:
If a Diagnostic Trouble Code is detected, refer to Diagnostic Trouble Code (DTC) List - Vehicle,
and diagnose the appropriate DTC.
If the brake pedal feels spongy, perform the conventional brake bleed procedure again.
Hydraulic Brake System Bleeding
13. When the desired pedal height is achieved, press the brake pedal to inspect for firmness.
14. Remove the scan tool.
© 2023
15. Install all four tire and wheel GeneralTire
assemblies. Motors. All rights
and Wheel reserved.
Removal and Installation

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4/26/23, 10:45 AM Antilock Brake System Automated Bleed

16. Remove the support and lower the vehicle.

17. Inspect the brake fluid level. Brake Master Cylinder Reservoir Filling
18. Road test the vehicle while inspecting that the pedal remains high and firm.

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4/26/23, 11:04 AM Antilock Brake System Schematics

2022 Buick Encore GX | | Brakes | Antilock Brake System |

Encore GX Service Manual N America 14739426
Schematic and Routing Diagrams | Document ID: 5674988

Antilock Brake System Schematics

Figure 1: Module Power, Ground, and Subsystem References
Figure 2: Wheel Speed Sensors
Figure 3: Stability Control

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4/26/23, 11:13 AM Approximate Fluid Capacities

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Hydraulic Brakes | Specifications |
Document ID: 5214999

Approximate Fluid Capacities

Approximate Fluid Capacities

Specification

Application Metric US English

Hydraulic Brake System 0.788 L 1.665 pt

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4/26/23, 11:11 AM Brake and Accelerator Pedal Assembly Replacement

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Hydraulic Brakes | Repair Instructions |
Document ID: 5236973

Brake and Accelerator Pedal Assembly Replacement

Removal Procedure

1. Battery Tray » Remove — Battery Tray Replacement

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2. Instrument Panel Tie Bar Bolt (1) » Remove
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3. Steering Column » Remove — Steering Column Replacement

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4. Instrument Panel Tie Bar Bolt (1) » Remove [4x]

5. Wiring Harness Retainer @ Steering Column Bracket » Release
6. Steering Column Bracket (2) General
© 2023 @ Instrument
Motors.Panel Tie Bar
All rights » Remove
reserved.

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4/26/23, 11:11 AM Brake and Accelerator Pedal Assembly Replacement

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7. Electrical Connector (1) @ Accelerator Pedal Position Sensor » Disconnect
8. Electrical Connector (2) @ Brake Pedal Position Sensor » Disconnect
9. Wiring Harness Retainer @ Brake and Accelerator Pedal Bracket » Release [3x]
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10. Brake Pedal Push Rod (3) @ Brake Pedal (2) » Disconnect
Release the 2 retainer tabs and pull the brake pedal a bit to facilitate the removal.
11. Brake Pedal Push Rod Retainer (1) @ Brake Pedal Push Rod (3) » Remove and DISCARD

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4/26/23, 11:11 AM Brake and Accelerator Pedal Assembly Replacement

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12. Brake and Accelerator Pedal Bracket Nut (1) Remove [5x]
13. Wiring Harness Retainer @ Brake and Accelerator Pedal Assembly » Release
14. Brake and Accelerator Pedal Assembly (2) Remove
15. Transfer components as necessary.

Installation Procedure
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1. Brake and Accelerator Pedal Assembly (2) Install

2. Wiring Harness Retainer @ Brake and Accelerator Pedal Assembly » Secure
Caution: Fastener Caution
3. Brake and Accelerator Pedal Bracket Nut (1) Install and tighten [5x] 22 Y (16 lb ft)

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4/26/23, 11:11 AM Brake and Accelerator Pedal Assembly Replacement

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4. Brake Pedal Push Rod Retainer (1) @ Brake Pedal Push Rod (3) » Install NEW
5. Brake Pedal Push Rod (3) @ Brake Pedal (2) » Connect
6. Wiring Harness Retainer @ Brake and Accelerator Pedal Bracket » Install [3x]

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7. Electrical Connector (2) @ Brake Pedal Position Sensor » Connect

8. Electrical Connector (1) @ Accelerator Pedal Position Sensor » Connect

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4/26/23, 11:11 AM Brake and Accelerator Pedal Assembly Replacement

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9. Steering Column Bracket (2) @ Instrument Panel Tie Bar » Install
10. Wiring Harness Retainer @ Steering Column Bracket » Secure
11. Instrument Panel Tie Bar Bolt (1) » Install and tighten [4x] 22 Y (16 lb ft)
12. Steering Column » Install — Steering Column Replacement
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13. Instrument Panel Tie Bar Bolt (1) » Install and tighten [4x] 22 Y (16 lb ft)
14. Battery Tray » Install — Battery Tray Replacement

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4/26/23, 11:10 AM Brake Assist System Description and Operation

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Hydraulic Brakes |
Description and Operation | Document ID: 5128892

Brake Assist System Description and Operation

System Component Description

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Note: The above graphic may not be an exact representation for every vehicle configuration.

The brake assist system is an electro - hydraulic brake booster that replaces a vacuum booster
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including its vacuum supply. The brake booster unit takes the driver applied brake demand and
transforms this into an amplified brake pressure and does not rely on vacuum to function. The
brake booster unit is designed to operate together with an electronic stability control module
which is normally responsible for ABS, traction control and stability control.

The master cylinder and power brake booster unit consists of a brake master cylinder reservoir
(1), an electronic brake booster control module (2), pedal coupling unit/pushrod, and the brake
master cylinder (3) with integrated brake pressure modulator valve.

System Operation

Brake system input force is multiplied by the brake pedal and transferred by the pedal pushrod to
the hydraulic brake master cylinder. Effort required to apply the brake system is reduced by the
electronic brake booster.

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4/26/23, 10:43 AM Brake Caliper Inspection

2022 Buick Encore GX | | Brakes | Disc Brakes |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5082740

Brake Caliper Inspection

Warning: Brake Dust Warning

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1. Inspect the brake caliper housing (1) for cracks, excess wear, and/or damage. If any of these
conditions are present, the brake caliper requires replacement.
2. Inspect the caliper piston dust boot seal (3) for cracks, tears, cuts, deterioration and/or improper
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seating in the caliper body. If any of these conditions are present, the brake caliper requires
overhaul or replacement.
3. Inspect for brake fluid leakage around the caliper piston dust boot seal (3) and on the disc brake
pads. If there is any evidence of brake fluid leakage, the brake caliper requires overhaul or
replacement.
4. Inspect for smooth and complete travel of the caliper piston (2) into the caliper bore. The movement
of the caliper piston (2) into the caliper bore should be smooth and even. If the caliper piston (2) is
frozen or difficult to bottom, the caliper requires overhaul or replacement.

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4/26/23, 11:13 AM Brake Component Specifications

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Hydraulic Brakes | Specifications |
Document ID: 5218063

Brake Component Specifications

Brake Component Specifications

Specification

Application Metric English

Front Brake Caliper Bleeder Valve 10 Y 89 lb in

Rear Brake Caliper Bleeder Valve 17 Y 13 lb ft

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4/26/23, 11:16 AM Brake Fluid Loss

2022 Buick Encore GX | | Brakes | Hydraulic Brakes |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5236105

Brake Fluid Loss

Brake Fluid Loss

Step Action Yes No

DEFINITION: Brake fluid level is low not related to lining wear.

Were you sent here from the Hydraulic Brake Go to Diagnostic

1 Symptom table? Starting Point -
Go to Step 2 Vehicle

1. Inspect the following hydraulic brake system

components for brake fluid leaks:
Flexible brake hose connections,

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threaded and bolted
Flexible brake hose crimp joints
2 Brake pipe fittings
Caliper piston seals
Master cylinder reservoir
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2. Repair or replace components as necessary.
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Hydraulic Brake System Diagnosis

Did you find and correct a condition? Go to Step 5 Go to Step 3

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1. Wipe clean the external surface of the master

cylinder.
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3 2. Inspect the master cylinder for a brake fluid

leak. Go to Diagnostic
Starting Point -
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Did you find a brake fluid leak? Go to Step 4 Vehicle

Replace the brake master cylinder.

4 —
Did you complete the replacement? Go to Step 5

1. Install or connect components that were

removed or disconnected during diagnosis.
5 2. Road test the vehicle to confirm proper
operation. Brake System Vehicle Road Test

Is the condition still present? Go to Step 2 System OK

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4/26/23, 11:11 AM Brake Master Cylinder Replacement - With Power Brake Booster and Electronic Brake Control Module

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Hydraulic Brakes | Repair Instructions |
Document ID: 5236972

Brake Master Cylinder Replacement - With Power Brake

Booster and Electronic Brake Control Module
Removal Procedure

Warning: The battery must be disconnected to prevent the brake master cylinder from
pressurizing the hydraulic system during its automated self diagnostic tests that can
possibly occur when a door is opened or the key transmitter is activated. Failure to
follow this precaution may cause personal injury.

Warning: Brake Fluid Irritant Warning

Caution: Brake Fluid Effects on Paint and Electrical Components Caution

1. Drain and properly dispose of the brake fluid in the master cylinder reservoir.
2. Disconnect the battery negative cable. Battery Negative Cable Disconnection and Connection

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3. Battery Tray » Remove — Battery Tray Replacement

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4. Brake Master Cylinder Reservoir - Upper (2) » Remove — Brake Master Cylinder Reservoir
Replacement

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4/26/23, 11:11 AM Brake Master Cylinder Replacement - With Power Brake Booster and Electronic Brake Control Module

5. Battery Negative Cable Ground Nut (1) @ Front Wheelhouse Panel » Remove
6. Battery Negative Cable (2) @ Front Wheelhouse Panel » Separate

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7. Electrical Connector (1) @ Electronic Brake Control Module (2) » Disconnect
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Note: Cap the brake pipe fittings to prevent brake fluid loss and contamination.
8. Brake Pipe Fitting (1) @ Brake Pressure Modulator Valve » Remove [4x]

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4/26/23, 11:11 AM Brake Master Cylinder Replacement - With Power Brake Booster and Electronic Brake Control Module

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9. Brake and Accelerator Pedal Bracket Nut (1) » Remove [2x]

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10. Instrument Panel Tie Bar Bolt (1) » Remove

11. Brake Master Cylinder Bracket Nut (2) » Remove
12. Floor Front Air Outlet Duct - Left Side » Remove — Floor Front Air Outlet Duct Replacement -
Left Side

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4/26/23, 11:11 AM Brake Master Cylinder Replacement - With Power Brake Booster and Electronic Brake Control Module

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Note: Push the master cylinder because pulling the pedal too backward may damage the
brake pedal position sensor.
13. Brake Pedal Push Rod (3) @ Brake Pedal (2) » Disconnect
Release the 2 retainer tabs and pull the brake pedal a bit to facilitate the removal.

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14. Brake Pedal Push Rod Retainer (1) @ Brake Pedal Push Rod (3) » Remove and DISCARD
15. Brake Master Cylinder » Remove
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16. Transfer components as necessary.

Installation Procedure
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1. Brake Master Cylinder (3) » Install

Caution: Fastener Caution
2. Brake Master Cylinder Bracket Nut (2) » Install and tighten 9 Y (80 lb in)
3. Instrument Panel Tie Bar Bolt (1) » Install and tighten 22 Y (16 lb ft)
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4/26/23, 11:11 AM Brake Master Cylinder Replacement - With Power Brake Booster and Electronic Brake Control Module

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4. Brake and Accelerator Pedal Bracket Nut (1) » Install and tighten [2x] 22 Y (16 lb ft)

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5. Brake Pipe Fitting (1) @ Brake Pressure Modulator Valve » Install and tighten [4x] 18 Y (13
lb ft)

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4/26/23, 11:11 AM Brake Master Cylinder Replacement - With Power Brake Booster and Electronic Brake Control Module

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6. Electrical Connector (1) @ Electronic Brake Control Module (2) » Connect

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7. Battery Negative Cable (2) @ Front Wheelhouse Panel » Install

8. Battery Negative Cable Ground Nut (1) @ Front Wheelhouse Panel » Install and tighten —
Battery Negative Cable Replacement

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4/26/23, 11:11 AM Brake Master Cylinder Replacement - With Power Brake Booster and Electronic Brake Control Module

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9. Brake Master Cylinder Reservoir - Upper (2) » Install — Brake Master Cylinder Reservoir
Replacement

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10. Brake Pedal Push Rod Retainer (1) @ Brake Pedal Push Rod (3) » Install NEW
11. Brake Pedal Push Rod (3) @ Brake Pedal (2) » Connect
12. Floor Front Air Outlet Duct - Left Side » Install — Floor Front Air Outlet Duct Replacement -
Left Side
13. Battery Tray » Install — Battery Tray Replacement
14. Connect the battery negative cable. Battery Negative Cable Disconnection and Connection
15. Program the electronic brake control module. Control Module References
16. Bleed the brake system. Hydraulic Brake System Bleeding
17. Fill the brake master cylinder reservoir to the maximum-full level with GM approved brake
fluid from a clean, sealed brake fluid container. Brake Master Cylinder Reservoir Filling
18. Connect the scan tool and perform the brake pressure test.
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4/26/23, 11:10 AM Brake Master Cylinder Reservoir Filling

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Hydraulic Brakes | Repair Instructions |
Document ID: 5236114

Brake Master Cylinder Reservoir Filling

Warning: Brake Fluid Irritant Warning

Caution: Brake Fluid Effects on Paint and Electrical Components Caution

1. Visually inspect the brake fluid level through the brake master cylinder reservoir.
2. If the brake fluid level is at or below the half-full point during routine fluid checks, the brake system
should be inspected for wear and possible brake fluid leaks.
3. If the brake fluid level is at or below the half-full point during routine fluid checks, and an inspection
of the brake system did not reveal wear or brake fluid leaks, the brake fluid may be topped-off up to
the maximum-fill level.
4. If the brake fluid level is above the half-full point, adding brake fluid is not recommended under
normal conditions.
5. If brake system service was just completed, the brake fluid may be topped-off up to the maximum-

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fill level.
6. If brake fluid is to be added to the master cylinder reservoir, clean the outside of the reservoir on
and around the reservoir cap prior to removing the cap and diaphragm.
7. Use only GM approved brake fluid from a clean, sealed brake fluid container to SLOWLY fill the brake
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master cylinder reservoir to avoid spillage due to overfilling.
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4/26/23, 11:10 AM Brake Master Cylinder Reservoir Replacement (Attached)

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Hydraulic Brakes | Repair Instructions |
Document ID: 5236971

Brake Master Cylinder Reservoir Replacement (Attached)

Removal Procedure

Warning: The battery must be disconnected to prevent the brake master cylinder from
pressurizing the hydraulic system during its automated self diagnostic tests that can
possibly occur when a door is opened or the key transmitter is activated. Failure to
follow this precaution may cause personal injury.

Warning: Brake Fluid Irritant Warning

Caution: Brake Fluid Effects on Paint and Electrical Components Caution

1. Drain and properly dispose of the brake fluid in the master cylinder reservoir.
2. Disconnect the battery negative cable. Battery Negative Cable Disconnection and Connection

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3. Brake Master Cylinder Reservoir - Upper (2) » Remove — Brake Master Cylinder Reservoir
Replacement

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4/26/23, 11:10 AM Brake Master Cylinder Reservoir Replacement (Attached)

4. Brake Master Cylinder Reservoir Bolt (1) » Remove

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5. Remove the attached brake master cylinder reservoir (1) by lifting the front up and
disengaging the rear clip.

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4/26/23, 11:10 AM Brake Master Cylinder Reservoir Replacement (Attached)

6. Brake Master Cylinder Reservoir Grommet (1) » Remove and DISCARD [3x]

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7. Note the location of the filter element for proper installation.

8. Transfer components as necessary.

Installation Procedure

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4/26/23, 11:10 AM Brake Master Cylinder Reservoir Replacement (Attached)

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1. Ensure the filter element (1) is installed in the correct hydraulic bore with the pin on the filter
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element installed in the correct bore.
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2. Lubricate the brake master cylinder reservoir grommets (1) with brake fluid. Adhesives, Fluids,
Lubricants, and Sealers
3. Brake Master Cylinder Reservoir Grommet (1) » Install NEW [3x]

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4/26/23, 11:10 AM Brake Master Cylinder Reservoir Replacement (Attached)

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4. Install the attached brake master cylinder reservoir (1) by engaging the rear clip and lowering
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the front.
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Caution: Fastener Caution

5. Brake Master Cylinder Reservoir Bolt (1) » Install and tighten 5-6 Y (44-53 lb in)

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4/26/23, 11:10 AM Brake Master Cylinder Reservoir Replacement (Attached)

6. Brake Master Cylinder Reservoir - Upper (2) » Install — Brake Master Cylinder Reservoir

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Replacement
7. Connect the battery negative cable. Battery Negative Cable Disconnection and Connection
8. Bleed the brake system. Hydraulic Brake System Bleeding
9. Fill the brake master cylinder reservoir to the maximum-full level with GM approved brake
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fluid from a clean, sealed brake fluid container. Brake Master Cylinder Reservoir Filling
10. Check for brake system leaks.
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4/26/23, 11:10 AM Brake Master Cylinder Reservoir Replacement (Upper)

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Hydraulic Brakes | Repair Instructions |
Document ID: 5236970

Brake Master Cylinder Reservoir Replacement (Upper)

Removal Procedure

Warning: The battery must be disconnected to prevent the brake master cylinder from
pressurizing the hydraulic system during its automated self diagnostic tests that can
possibly occur when a door is opened or the key transmitter is activated. Failure to
follow this precaution may cause personal injury.

Warning: Do NOT clamp the brake master cylinder reservoir tube to stop the flow of brake fluid.
Doing so could cause damage to the tube, degradation of braking performance, and
potential loss of brakes. Failure to follow this warning may cause component damage or
personal injury.

Warning: Brake Fluid Irritant Warning

Caution: Brake Fluid Effects on Paint and Electrical Components Caution

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1. Drain and properly dispose of the brake fluid in the master cylinder reservoir.
2. Disconnect the battery negative cable. Battery Negative Cable Disconnection and Connection

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3. Electrical Connector (1) @ Brake Fluid Level Indicator Switch (2) » Disconnect

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4/26/23, 11:10 AM Brake Master Cylinder Reservoir Replacement (Upper)

Warning: Do NOT clamp the brake master cylinder reservoir tube to stop the flow of brake
fluid. Doing so could cause damage to the tube, degradation of braking
performance, and potential loss of brakes. Failure to follow this warning may cause
component damage or personal injury.
4. Quick Connect Fitting (1) @ Brake Master Cylinder » Disconnect

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5. Brake Master Cylinder Reservoir Bracket Nut (1) » Remove [2x]
6. Brake Master Cylinder Reservoir - Upper (2) » Remove
7. Transfer components as necessary.
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Installation Procedure
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1. Brake Master Cylinder Reservoir - Upper (2) » Install

Caution: Fastener Caution
© Reservoir
2. Brake Master Cylinder 2023 General Motors.
Bracket All »rights
Nut (1) reserved.
Install and tighten [2x] 9 Y (80 lb in)

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4/26/23, 11:10 AM Brake Master Cylinder Reservoir Replacement (Upper)

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3. Quick Connect Fitting (1) @ Brake Master Cylinder » Connect

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4. Electrical Connector (1) @ Brake Fluid Level Indicator Switch (2) » Connect
5. Connect the battery negative cable. Battery Negative Cable Disconnection and Connection
6. Bleed the brake system. Hydraulic Brake System Bleeding
7. Fill the brake master cylinder reservoir to the maximum-full level with GM approved brake
fluid from a clean, sealed brake fluid container. Brake Master Cylinder Reservoir Filling

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4/26/23, 10:20 AM Brake Pad and Rotor Burnishing

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Disc Brakes | Repair Instructions |
Document ID: 5070803

Brake Pad and Rotor Burnishing

Warning: Road test a vehicle under safe conditions and while obeying all traffic laws. Do not attempt
any maneuvers that could jeopardize vehicle control. Failure to adhere to these precautions
could lead to serious personal injury and vehicle damage.

Burnishing the brake pads and brake rotors is necessary in order to ensure that the braking surfaces are
properly prepared after service has been performed on the disc brake system.

This procedure should be performed whenever the disc brake rotors have been refinished or replaced,
and/or whenever the disc brake pads have been replaced.

1. Select a smooth road with little or no traffic.

2. Accelerate the vehicle to 48 km/h (30 mph).
Note: Use care to avoid overheating the brakes while performing this step.
3. Using moderate to firm pressure, apply the brakes to bring the vehicle to a stop. Do not allow the

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brakes to lock.
4. Repeat steps 2 and 3 until approximately 20 stops have been completed. Allow sufficient cooling
periods between stops in order to properly burnish the brake pads and rotors.

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4/26/23, 10:43 AM Brake Pad Inspection

2022 Buick Encore GX | | Brakes | Disc Brakes |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5072574

Brake Pad Inspection

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Warning: Brake Dust Warning
Note: If equipped with JE0, any time the caliper pistons may become pressed into the caliper bores,
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the negative battery cable must be disconnected first. The brake caliper pistons and disc
brake pads must be fully seated to the rotor before reconnecting the battery to avoid false
codes being set.
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1. Inspect the disc brake pads at regular intervals, or whenever the tire and wheel assemblies are
removed from the vehicle.
2. If replacement is necessary, always replace disc brake pads in axle sets.
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3. Both front and rear disc brake pads have integral, audible wear sensors (1). When the disc brake
pad wear reaches the minimum allowable thickness, the wear sensor contacts the disc brake rotor
(2). The wear sensors (1) will then produce an audible, high-pitched warning noise during wheel
rotation. Inspect both edges of the disc brake pad friction surfaces. The highest rate of wear
normally occurs at the leading edge of the disc brake pads.
4. Inspect the thickness of the disc brake pads in order to ensure that they have not worn prematurely.
The disc brake pad wear should be approximately even per axle set.
5. Replace the disc brake pads when the brake pad life monitoring system signals that this axle set of
pads is at end of life, or if the friction surface is worn to within 2.0 mm (0.079 in) of the mounting
plates on any inspected pad.
6. Verify that any disc brake pad shims that may be required are in place and not damaged or
excessively corroded. Replace pads if they exhibit any missing or damaged shims in order to
preserve proper disc brake performance.
7. Replace the disc brake pads if any have separated from the mounting plates.
8. Inspect the disc brake pads friction surfaces for cracks, fractures, or damage which may cause noise
or otherwise impair disc brake performance.

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4/26/23, 10:36 AM Brake Pad Life Monitoring Description and Operation

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Disc Brakes | Description and Operation |
Document ID: 5641342

Brake Pad Life Monitoring Description and Operation

This vehicle has a system that estimates the remaining life of the front and rear brake pads. When the
feature is active, brake pad life is displayed in the Driver Information Center (DIC), along with a
percentage and distance for each axle.

When the system has determined that the brake pads need to be replaced, a message will display,
which may include mileage remaining.

Customers can use this information to plan their vehicle maintenance. A prognostic indicator of life
remaining, especially in distance remaining, enables customers to arrange brake pad replacement at a
convenient time.

The system will display a percent pad life on the DIC at all time just like oil life monitoring. When you
approach end of pad life, the messaging will change to a distance parameter (i.e. 2000 miles remaining,
etc.) and it will start to actively remind the driver to take action at ignition cycle intervals.

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If the feature has malfunctioned, fault messaging will be provided. The customer will be able to disable
the feature display if desired, and the display will confirm this.

The Brake System Control Module has one analog input for a front axle brake pad wear sensor and one
analog input for a rear axle brake pad wear sensor. The brake system control module supply voltage to
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the brake pad wear sensor and the sensor is grounded to the vehicle ground. The brake system control
module diagnose any issues with the power supply for the sensors and set “ invalid” if there is a failure
detected in the supply voltage system.
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The brake pad life system can be turned off. This may be necessary if aftermarket brake pads without
wear sensors are installed. When the system is turned off, the front and rear brake pad life percentages
will not display.
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4/26/23, 10:40 AM Brake Pad Life Monitoring Malfunction (Front)

2022 Buick Encore GX | | Brakes | Disc Brakes |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5523534

Brake Pad Life Monitoring Malfunction (Front)

Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C116C Front Brake Pad Wear Signal Circuit

Symptom Byte Information: Symptom Byte List

Diagnostic Fault Information

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Short to Open/High Short to Signal
Circuit Ground Resistance Voltage Performance

Signal
.c C116C C116C 05 C116C 05
C116B 55,
56, 59, 5A,
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Low Reference — C116C 05 — —
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Circuit/System Description

For an overview of the component/system, refer to: Brake Pad Life Monitoring Description and
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Operation
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Circuit Description

The control module input circuit has an internal

Signal
resistance connected to 12 V.

Ground circuit Chassis Ground

Conditions for Running the DTC

Ignition » On / Vehicle » In Service Mode

Battery Voltage = Greater than 9 V & Less than 16 V

Conditions for Setting the DTC

C116C 05, 55, 56, 59, 5A

Signal circuit = Voltage Out of Range

Ground circuit = Open

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4/26/23, 10:40 AM Brake Pad Life Monitoring Malfunction (Front)

Front Disc Brake Pad Wear Sensor = Worn

C116C 71

The control module receives no or invalid data from a sensor.

Actions Taken When the DTC Sets

A message and/or warning indicator may be displayed to the driver.

Conditions for Clearing the DTC

A current DTC will clear when the diagnostic runs and passes.

Reference Information
Schematic Reference

Disc Brake Schematics

Connector End View Reference

Master Electrical Component List

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Electrical Information Reference

Circuit Testing
Connector Repairs
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Testing for Intermittent Conditions and Poor Connections
Wiring Repairs
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Scan Tool Reference

Control Module References

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Circuit/System Verification

1. Verify no other DTCs are set.

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⇒ If other DTCs are set

Refer to: Diagnostic Trouble Code (DTC) List - Vehicle
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⇓ If no other DTCs are set

Refer to: Circuit/System Testing

Circuit/System Testing

Note: It may take up to 2 min for all vehicle systems to power down before an accurate
ground or low reference circuit continuity test can be performed.
1. Ignition/Vehicle & All vehicle systems » Off
2. Disconnect the electrical connector: B172LF Brake Pad Wear Sensor - Left Front
3. Test for less than 10 Ω between the test points: Ground circuit terminal 2 & Ground
⇒ If 10 Ω or greater
3.1. Test for less than 2 Ω between the test points: Ground circuit terminal 2 @ Component
harness & The other end of the circuit
⇒ If 2 Ω or greater » Repair the open/high resistance in the circuit.
⇒ If less than 2 Ω » Repair the open/high resistance in the ground connection.
⇓ If less than 10 Ω
4. Ignition/Vehicle » Off© 2023 General Motors. All rights reserved.

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4/26/23, 10:40 AM Brake Pad Life Monitoring Malfunction (Front)

5. Disconnect the electrical connector: @ K160 Brake System Control Module

6. Test for infinite resistance between the test points: Signal circuit terminal 1 @ Component
harness & Ground
⇒ If less than infinite resistance
Repair the short to ground on the circuit
⇓ If infinite resistance
7. Ignition » On / Vehicle » In Service Mode
8. Test for less than 1 V between the test points: Signal circuit terminal 1 @ Component harness
& Ground
⇒ If 1 V or greater
Repair the short to voltage on the circuit.
⇓ If less than 1 V
9. Ignition/Vehicle » Off
10. Test for less than 2 Ω between the test points: Signal circuit terminal 1 @ Component harness
& Terminal X1 35 @ Control module harness
⇒ If 2 Ω or greater

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Repair the open/high resistance in the circuit
⇓ If less than 2 Ω
11. Replace the component: B172LF Brake Pad Wear Sensor - Left Front
12. Verify DTC C116C is not set.
⇒ If the DTC sets
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Replace the component: K160 Brake System Control Module
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⇓ If the DTC does not set
13. All OK.
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Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
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Verification

Front Disc Brake Pad Wear Sensor Replacement

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For control module replacement, programming, and setup refer to: Control Module
References

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4/26/23, 10:39 AM Brake Pad Life Monitoring Malfunction (Rear)

2022 Buick Encore GX | | Brakes | Disc Brakes |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5523508

Brake Pad Life Monitoring Malfunction (Rear)

Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C116B Rear Brake Pad Wear Signal Circuit

Symptom Byte Information: Symptom Byte List

Diagnostic Fault Information

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Short to Open/High Short to Signal
Circuit Ground Resistance Voltage Performance

Signal
.c C116B C116B 05 C116B 05
C116B 55,
56, 59, 5A,
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Low Reference — C116B 05 — —
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Circuit/System Description

For an overview of the component/system, refer to: Brake Pad Life Monitoring Description and
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Operation
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Circuit Description

The control module input circuit has an internal

Signal
resistance connected to 12 V.

Ground circuit Chassis Ground

Conditions for Running the DTC

Ignition » On / Vehicle » In Service Mode

Battery Voltage = Greater than 9 V & Less than 16 V

Conditions for Setting the DTC

C116B 05, 55, 56, 59, 5A

Signal circuit = Voltage Out of Range

Ground circuit = Open

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4/26/23, 10:39 AM Brake Pad Life Monitoring Malfunction (Rear)

Rear Disc Brake Pad Wear Sensor = Worn

C116B 71

The control module receives no or invalid data from a sensor.

Actions Taken When the DTC Sets

A message and/or warning indicator may be displayed to the driver.

Conditions for Clearing the DTC

A current DTC will clear when the diagnostic runs and passes.

Reference Information
Schematic Reference

Disc Brake Schematics

Connector End View Reference

Master Electrical Component List

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Electrical Information Reference

Circuit Testing
Connector Repairs
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Testing for Intermittent Conditions and Poor Connections
Wiring Repairs
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Scan Tool Reference

Control Module References

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Circuit/System Verification

1. Verify no other DTCs are set.

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⇒ If other DTCs are set

Refer to: Diagnostic Trouble Code (DTC) List - Vehicle
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⇓ If no other DTCs are set

Refer to: Circuit/System Testing

Circuit/System Testing

Note: It may take up to 2 min for all vehicle systems to power down before an accurate
ground or low reference circuit continuity test can be performed.
1. Ignition/Vehicle & All vehicle systems » Off
2. Disconnect the electrical connector: B172RR Brake Pad Wear Sensor - Right Rear
3. Test for less than 10 Ω between the test points: Ground circuit terminal 2 & Ground
⇒ If 10 Ω or greater
3.1. Test for less than 2 Ω between the test points: Ground circuit terminal 2 @ Component
harness & The other end of the circuit
⇒ If 2 Ω or greater » Repair the open/high resistance in the circuit.
⇒ If less than 2 Ω » Repair the open/high resistance in the ground connection.
⇓ If less than 10 Ω
4. Ignition/Vehicle » Off© 2023 General Motors. All rights reserved.

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4/26/23, 10:39 AM Brake Pad Life Monitoring Malfunction (Rear)

5. Disconnect the electrical connector: @ K160 Brake System Control Module

6. Test for infinite resistance between the test points: Signal circuit terminal 1 @ Component
harness & Ground
⇒ If less than infinite resistance
Repair the short to ground on the circuit
⇓ If infinite resistance
7. Ignition » On / Vehicle » In Service Mode
8. Test for less than 1 V between the test points: Signal circuit terminal 1 @ Component harness
& Ground
⇒ If 1 V or greater
Repair the short to voltage on the circuit.
⇓ If less than 1 V
9. Ignition/Vehicle » Off
10. Test for less than 2 Ω between the test points: Signal circuit terminal 1 @ Component harness
& Terminal X1 40 @ Control module harness
⇒ If 2 Ω or greater

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Repair the open/high resistance in the circuit
⇓ If less than 2 Ω
11. Replace the component: B172RR Brake Pad Wear Sensor - Right Rear
12. Verify DTC C116B is not set.
⇒ If the DTC sets
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Replace the component: K160 Brake System Control Module
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⇓ If the DTC does not set
13. All OK.
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Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
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Verification

Rear Disc Brake Pad Wear Sensor Replacement

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For control module replacement, programming, and setup refer to: Control Module
References

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4/26/23, 10:14 AM Brake Pad Life Monitoring Reset

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Disc Brakes | Repair Instructions |
Document ID: 5044098

Brake Pad Life Monitoring Reset

The Brake Pad Life Monitoring Reset Learn is required after replacing the brake pads.

The Brake Pad Life Monitoring Reset Learn procedure can be completed with a scan tool using the
following steps:

1. Install the scan tool to the data link connector.

2. Ignition ON, engine OFF.
3. Select the Front Axle Brake Pad Life Monitoring Reset or Rear Axle Brake Pad Life Monitoring Reset in
the Brake System Control Module Configuration/Reset Functions list.
4. Follow the scan tool directions to complete the reset procedure.
5. Clear any DTCs that may be set.

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4/26/23, 11:15 AM Brake Pedal Excessive Effort

2022 Buick Encore GX | | Brakes | Hydraulic Brakes |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5236102

Brake Pedal Excessive Effort

Brake Pedal Excessive Effort

Step Action Yes No

DEFINITION: Brake pedal requires an increased amount of input from the driver to obtain good
braking action and/or stopping distance is increased.

Were you sent here from the Hydraulic Brake Go to Diagnostic

1 Symptom table? Starting Point -
Go to Step 2 Vehicle

1. Inspect the brake assist system for the

following conditions:

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Lack of lubrication, binding or
excessively worn pushrod or pedal
pivots or pivot bushings
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Bent or damaged pedal pushrod, pedal,
or pedal bracket
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2. Adjust, repair or replace components as
necessary. Hydraulic Brake System Diagnosis
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Did you find and correct a condition? Go to Step 5 Go to Step 3
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1. Inspect the hydraulic brake system for the

following conditions:
Binding caliper pistons
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Internally damaged flexible brake

hoses; hindering fluid flow
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External brake fluid leaks

Kinked or damaged flexible brake hoses
3 and/or pipes
Internal brake fluid leaks; improperly
operating master cylinder
Poor brake fluid quality; low boiling
point
2. Adjust, repair or replace components as
necessary. Hydraulic Brake System Diagnosis

Did you find and correct a condition? Go to Step 5 Go to Step 4

4 Go to Step 5 Go to Diagnostic
1. Inspect the disc brake system for the following Starting Point -
conditions: Vehicle
Excessively worn linings
Glazed linings
Cracked, distorted
© 2023orGeneral
damaged liningsAll rights reserved.
Motors.

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4/26/23, 11:15 AM Brake Pedal Excessive Effort

Step Action Yes No

Contaminated linings
Binding, damaged or excessively worn
caliper hardware and/or lining hardware
Lack of lubrication or excessive
corrosion on metal to metal contact
surfaces
Excessively worn or corroded rotor
friction surfaces
Glazed rotor friction surfaces
Hard spots, heat checks, blueing
discoloration of rotor friction surfaces
2. Adjust, repair or replace components as
necessary. Disc Brake System Diagnosis

Did you find and correct a condition?

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1. Install or connect components that were
removed or disconnected during diagnosis.

5 2. Road test the vehicle in order to confirm

proper operation. Brake System Vehicle Road
Test

Is the condition still present?

.c Go to Step 2 System OK
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4/26/23, 11:15 AM Brake Pedal Excessive Travel

2022 Buick Encore GX | | Brakes | Hydraulic Brakes |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5236101

Brake Pedal Excessive Travel

Brake Pedal Excessive Travel

Step Action Yes No

DEFINITION: Brake pedal travels further than expected to obtain firm pedal and/or firm pedal
cannot be obtained, pedal fades away, or pedal is spongy.

Were you sent here from the Hydraulic Brake Go to Diagnostic

1 Symptom table? Starting Point -
Go to Step 2 Vehicle

Inspect the travel and feel of brake pedal applies.

Perform the following:

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1. Apply the brake pedal with light, steady
pressure and hold for 15 seconds. Observe
pedal travel and feel.
2. Apply the brake pedal with light, steady
pressure, then without pumping the pedal,
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reduce pressure and reapply pressure several
times. Observe pedal travel and feel for each
apply.
—
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3. Apply the brake pedal slowly, then release and
apply the pedal quickly. Observe pedal travel
and feel for each apply.
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Did you complete the brake pedal travel and feel

inspections? Go to Step 3
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3 Go to Step 7 Go to Step 4
1. Inspect the hydraulic brake system for the
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conditions listed, based on the following

symptoms observed during the pedal travel
and feel inspections:
Pedal feel was spongy
– Air in hydraulic system
– External brake fluid leaks
– Soft, weak or damaged hydraulic
hoses; expanding under pressure
Pedal fell away and/or traveled to or
almost to floor
– External brake fluid leaks
– Poor brake fluid quality; low boiling
point
– Internal brake fluid leaks; improperly
functioning master cylinder
Pedal was somewhat firm then dropped
slightly, or pedal rose with successive
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4/26/23, 11:15 AM Brake Pedal Excessive Travel

Step Action Yes No

applies, or pedal travel was different

between slow and quick applies
– Internal brake fluid leaks; improperly
functioning master cylinder
– Poor brake fluid quality; low boiling
point
Pedal returned to rest slowly after any
of the applies
– Internally damaged flexible brake
hoses; hindering fluid return
– Binding caliper pistons
– Internal brake fluid leaks; improperly
functioning master cylinder
2. Repair or replace components as necessary.
Hydraulic Brake System Diagnosis
3. Re-inspect brake pedal apply travel and feel.

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Did you find and correct a condition?

1. Inspect the disc brake system for the following

conditions: .c
Cracked, excessively worn or damaged
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linings
Cracked, excessively worn or damaged
rotors
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Improperly operating, binding or

damaged caliper hardware and/or lining
hardware
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4 Loose or missing caliper hardware

and/or lining hardware
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Excessive assembled lateral runout

(LRO) of rotor friction surfaces
Bent or damaged caliper or mounting
component
2. Adjust, repair or replace components as
necessary. Disc Brake System Diagnosis
3. Re-inspect brake pedal apply travel and feel.

Did you find and correct a condition? Go to Step 7 Go to Step 5

Inspect for proper brake pedal travel. Brake Pedal

Travel Measurement and Inspection
5
Is the brake pedal travel distance within the
acceptable limits? Go to Step 7 Go to Step 6

6 Go to Step 7 —
1. Inspect for worn, missing, misaligned, bent or
damaged brake pedal system components.

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4/26/23, 11:15 AM Brake Pedal Excessive Travel

Step Action Yes No

Inspect the brake pedal pushrod. Brake

Pedal Pushrod Inspection
Inspect the brake pedal bushings for
binding, excessive wear and/or damage
and inspect the brake pedal for a
misaligned, bent, and/or damaged
condition.
2. Replace the brake pedal system components
that are worn, missing, misaligned, bent or
damaged.

Did you find and replace any worn, missing,

misaligned, bent or damaged brake pedal system
components?

1. Install or connect components that were

removed or disconnected during diagnosis.

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2. Road test the vehicle in order to confirm
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proper operation. Brake System Vehicle Road
Test

Is the condition still present? Go to Step 2 System OK

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4/26/23, 11:16 AM Brake Pedal Pushrod Inspection

2022 Buick Encore GX | | Brakes | Hydraulic Brakes |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5072589

Brake Pedal Pushrod Inspection

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1. Reposition the pedal pushrod boot (2) toward the front of the vehicle to expose as much of the pedal
pushrod (1) as possible.
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2. Inspect the brake pedal pushrod (1) for straightness.

3. If the brake pedal pushrod (1) is not straight, then the pushrod requires replacement.
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4. Return the pedal pushrod boot (2) to its original position on the pedal pushrod (1).

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4/26/23, 11:16 AM Brake Pedal Travel Measurement and Inspection

2022 Buick Encore GX | | Brakes | Hydraulic Brakes |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5236110

Brake Pedal Travel Measurement and Inspection

Special Tools

CH-28662 Brake Pedal Effort Gauge

Equivalent regional tools: Special Tools

1. With the ignition OFF and the brakes cool, apply the brakes 3–5 times or until the brake pedal
becomes firm.

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2. Install the CH-28662 Brake Pedal Effort Gauge (1) to the brake pedal (2).

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4/26/23, 11:16 AM Brake Pedal Travel Measurement and Inspection

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3. Measure and record the initial unapplied distance (a) from the brake pedal (2) to the rim of the
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steering wheel (3). Note the points of measurement.
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4/26/23, 11:16 AM Brake Pedal Travel Measurement and Inspection

4. Apply and maintain a force of 400 N (90 lb) to the brake pedal, as indicated on the CH-28662
gauge (1).
5. While maintaining 400 N (90 lb) of force to the brake pedal (2), measure and record the
distance (b) from the same point on the brake pedal (2) to the same point on the rim of the
steering wheel (3).
6. Release the brake pedal (2) and repeat steps 4 and 5 to obtain a second measurement. After
obtaining a second measurement, proceed to step 7.
7. Average the first and second measurements recorded for the 2 applies of the brakes.
8. Subtract the initial unapplied distance (a), from the average applied distance (b) to obtain the
brake pedal travel measurement.
9. Compare the brake pedal travel measurement obtained with the specification. Brake System
Specifications

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4/26/23, 11:16 AM Brake Pipe and Hose Inspection

2022 Buick Encore GX | | Brakes | Hydraulic Brakes |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5044065

Brake Pipe and Hose Inspection

Warning: Refer to Brake Fluid Irritant Warning.

Caution: Refer to Brake Fluid Effects on Paint and Electrical Components Caution.

1. Visually inspect all of the brake pipes for the following conditions:
Kinks, improper routing, missing or damaged retainers
Leaking fittings, excessive corrosion
2. If any of the brake pipes exhibited any of the conditions listed, then the identified pipe, or pipes,
require replacement.
3. Ensure that the vehicle axles are properly supported at ride height in order to maintain the proper
relationship of the flexible brake hoses to the chassis.

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4. Visually inspect all of the flexible brake hoses for the following conditions:
Kinks (1), improper routing, twists, chafing, missing or damaged retainers
Leaking connections, cracking, dry-rot, blisters, bulges
5. If any of the flexible brake hoses exhibited any of the conditions listed, then the identified flexible
brake hose, or hoses require replacement.
6. Squeeze the flexible brake hoses with firm finger pressure to check for soft spots (2), indicating an
internal restriction. Check the entire length of each flexible brake hose.
7. If any of the flexible brake hoses were found to have soft spots (2), then the identified flexible brake
hose, or hoses require replacement.

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4/26/23, 11:11 AM Brake Pipe Replacement

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Hydraulic Brakes | Repair Instructions |
Document ID: 5046203

Brake Pipe Replacement

Special Tools

CH-45405 Brake Pipe Flaring Kit

For equivalent regional tools. Special Tools

Warning: The battery must be disconnected to prevent the brake master cylinder from pressurizing
the hydraulic system during its automated self diagnostic tests that can possibly occur
when a door is opened or the key transmitter is activated. Failure to follow this precaution
may cause personal injury.
Warning: Brake Fluid Irritant Warning
Warning: Always use double walled steel brake pipe when replacing brake pipes. The use of any
other pipe is not recommended and may cause brake system failure. Carefully route and
retain replacement brake pipes. Always use the correct fasteners and the original location

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for replacement brake pipes. Failure to properly route and retain brake pipes may cause
damage to the brake pipes and cause brake system failure.
Caution: Brake Fluid Effects on Paint and Electrical Components Caution
Note: When servicing the brake pipes, note the following:
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If sectioning the brake pipe, use replacement pipe of the same type and outside diameter.
Use fittings of the appropriate size and type.
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Only create flares of the same type or design as originally equipped on the vehicle.
1. Disconnect the battery negative cable. Battery Negative Cable Disconnection and Connection
2. Inspect the area of brake pipe to be repaired or replaced.
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3. Release the brake pipe to be replaced from the retainers, as required.

4. Select an appropriate location to section the brake pipe, if necessary.
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Allow adequate clearance in order to maneuver the CH-45405 Brake Pipe Flaring Kit .
Avoid sectioning the brake pipe at bends or mounting points.
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5. Using a string or wire, measure the length of the pipe to be replaced including all pipe bends.
6. Add to the measurement taken the appropriate additional length required for each flare to be
created.
Specification
Specification 6.35 mm (0.250 in) for 4.76 mm (3/16 in) diameter pipe 9.50 mm (0.374 in) for 6.35
mm (1/4 in) diameter pipe 12.67 mm (0.499 in) for 7.94 mm (5/16 in) diameter pipe

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4/26/23, 11:11 AM Brake Pipe Replacement

Note: Ensure that the brake pipe end to be flared is cut at a square, 90 degree angle to the pipe
length.
7. Using the pipe cutter (1) included in the CH-45405 Brake Pipe Flaring Kit, carefully cut the brake
pipe squarely to the measured length.
8. Remove the sectioned brake pipe from the vehicle.
9. Select the appropriate size of brake pipe and tube nuts, as necessary. The brake pipe outside
diameter determines brake pipe size.

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10. Strip the nylon coating from the brake pipe end to be flared, if necessary.
10.1. Select the appropriate blade on the coating stripping tool (1) included in the CH-45405 Brake
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Pipe Flaring Kit, by unthreading the blade block from the stripping tool (1) and installing the
block with the desired blade facing the tool rollers.
Specification
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Specification 6.35 mm (0.250 in) blade for 4.76 mm (3/16 in) diameter pipe 9.50 mm (0.374 in)
blade for 6.35 mm (1/4 in) and 7.94 mm (5/16 in) diameter pipe
10.2. Insert the brake pipe end to be flared into the stripping tool (1) to the depth of the ledge on
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the tool rollers.

10.3. While holding the brake pipe firmly against the stripping tool roller ledges, rotate the
thumbwheel of the tool until the blade contacts the brake pipe coated surface.
Note: Do not gouge the metal surface of the brake pipe.
10.4. Rotate the stripping tool (1) in a clockwise direction, ensuring that the brake pipe end remains
against the tool roller ledges.
10.5. After each successive revolution of the stripping tool (1) , carefully rotate the thumbwheel of
the tool clockwise, in order to continue stripping the coating from the brake pipe until the
metal pipe surface is exposed.
10.6. Loosen the thumbwheel of the tool and remove the brake pipe.
Note: Ensure that all loose remnants of the nylon coating have been removed from the brake
pipe.
10.7. Inspect the stripped end of the brake pipe to ensure that the proper amount of coating has
been removed.
Specification
Specification 6.35 mm (0.250 in) for 4.76 mm (3/16 in) diameter pipe 9.50 mm (0.374 in) for
6.35 mm (1/4 in) and©7.94 mm
2023 (5/16 in)
General diameter
Motors. pipe reserved.
All rights

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4/26/23, 11:11 AM Brake Pipe Replacement

11. Chamfer the inside and outside diameter of the pipe with the de-burring tool (1) included in the CH-

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45405 Brake Pipe Flaring Kit.
12. Install the tube nuts on the brake pipe, noting their orientation.
13. Clean the brake pipe and the CH-45405 Brake Pipe Flaring Kit of lubricant, contaminants, and
debris.
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14. Loosen the die clamping screw (1) of the CH-45405 Brake Pipe Flaring Kit (2) .
15. Select the corresponding die set and install the die halves into the die cage with the full, flat face of
one die facing the clamping screw (1) , and the counterbores of both dies facing the forming ram.

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4/26/23, 11:11 AM Brake Pipe Replacement

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16. Place the flat face of an unused die (1) against the die halves in the clamping cage and hold firmly
against the counterbored face of the dies.
17. Insert the prepared end of the pipe to be flared through the back of the dies until the pipe is seated
against the flat surface of the unused die (1).
18. Remove the unused die (1).
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19. Ensure that the rear of both dies are seated firmly against the enclosed end of the die cage.
20. Firmly hand tighten the clamping screw (2) against the dies.
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21. Select the appropriate forming mandrel (1) and place into the forming ram.
22. Rotate the hydraulic fluid control valve clockwise to the closed position.
23. Rotate the body of the CH-45405 Brake Pipe Flaring Kit (2) until it bottoms against the die cage.

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4/26/23, 11:11 AM Brake Pipe Replacement

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24. While guiding the forming mandrel (1) into the exposed end of pipe to be flared, operate the lever
of the CH-45405 Brake Pipe Flaring Kit (2) until the forming mandrel bottoms against the clamping
dies.
25. Rotate the hydraulic fluid control valve counterclockwise to the open position to allow the hydraulic
forming ram to retract.
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26. Insert the finishing cone (1) into the forming ram.
27. Rotate the hydraulic fluid control valve clockwise to the closed position.
28. Rotate the body of the CH-45405 Brake Pipe Flaring Kit (2) until it bottoms against the die cage.
29. While guiding the finishing cone (1) into the exposed end of pipe to be flared, operate the lever of
the CH-45405 Brake Pipe Flaring Kit (2) until the finishing cone (1) bottoms against the dies.
30. Rotate the hydraulic fluid control valve counterclockwise to the open position to allow the hydraulic
forming ram to retract.
31. Loosen the die clamping screw and remove the dies and pipe.
32. If necessary, lightly tap the dies until the die halves separate.
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4/26/23, 11:11 AM Brake Pipe Replacement

33. Inspect the brake pipe flare (1) for correct shape and diameter (a).

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Specification
6.74–7.10 mm (0.265–0.279 in) flare diameter for 4.76 mm (3/16 in) diameter pipe
8.57–9.27 mm (0.344–0.358 in) flare diameter for 6.35 mm (1/4 in) diameter pipe
10.42–10.79 mm (0.410–0.425 in) flare diameter for 7.94 mm (5/16 in) diameter pipe
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34. If necessary, using the removed section of brake pipe as a template, shape the new pipe with a
suitable brake pipe bending tool.
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Note: When installing the pipe, maintain a clearance of 19 mm (3/4 in) from all moving or vibrating
components.
35. Install the pipe to the vehicle with the appropriate brake pipe unions, as required.
36. If previously released, secure the brake pipe to the retainers.
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37. Connect the battery negative cable. Battery Negative Cable Disconnection and Connection
38. Bleed the hydraulic brake system. Hydraulic Brake System Bleeding
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39. With the aid of an assistant, inspect the brake pipe flares for leaks by starting the engine and
applying the brakes.
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4/26/23, 11:11 AM Brake Pressure Modulator Valve Front Brake Pipe Replacement (Left Side)

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Hydraulic Brakes | Repair Instructions |
Document ID: 5236974

Brake Pressure Modulator Valve Front Brake Pipe

Replacement (Left Side)
Removal Procedure

Warning: The battery must be disconnected to prevent the brake master cylinder from
pressurizing the hydraulic system during its automated self diagnostic tests that can
possibly occur when a door is opened or the key transmitter is activated. Failure to
follow this precaution may cause personal injury.

Warning: Brake Fluid Irritant Warning

Caution: Brake Fluid Effects on Paint and Electrical Components Caution

1. Disconnect the battery negative cable. Battery Negative Cable Disconnection and Connection
2. Battery Tray » Remove — Battery Tray Replacement

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3. Raise and support the vehicle. Lifting and Jacking the Vehicle.
4. Remove the front tire and wheel assembly. Tire and Wheel Removal and Installation

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5. Brake Pressure Modulator Valve Front Brake Pipe Fitting (1) @ Brake Pressure Modulator Valve
» Remove
6. Plug the brake pressure modulator valve port to prevent brake fluid loss and contamination.
7. Cap the brake pipe fitting to prevent brake fluid loss and contamination.

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4/26/23, 11:11 AM Brake Pressure Modulator Valve Front Brake Pipe Replacement (Left Side)

8. Brake Pressure Modulator Valve Front Brake Pipe Fitting (1) @ Front Brake Hose (3) » Remove

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9. Cap the brake pipe fitting to prevent brake fluid loss and contamination.
10. Front Brake Hose Retainer (2) » Remove

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11. Brake Pressure Modulator Valve Front Brake Pipe Clip (1) » Release
12. Brake Pressure Modulator Valve Front Brake Pipe (2) @ Vehicle » Remove

Installation Procedure

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4/26/23, 11:11 AM Brake Pressure Modulator Valve Front Brake Pipe Replacement (Left Side)

1. Brake Pressure Modulator Valve Front Brake Pipe (2) @ Vehicle » Install

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2. Brake Pressure Modulator Valve Front Brake Pipe Clip (1) » Secure

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3. Front Brake Hose Retainer (2) » Install

Caution: Fastener Caution
4. Brake Pressure Modulator Valve Front Brake Pipe Fitting (1) @ Front Brake Hose (3) » Install
and tighten 18 Y (13 lb ft)

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4/26/23, 11:11 AM Brake Pressure Modulator Valve Front Brake Pipe Replacement (Left Side)

5. Remove the plug from the brake pressure modulator valve port.

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6. Brake Pressure Modulator Valve Front Brake Pipe Fitting (1) @ Brake Pressure Modulator Valve
» Install and tighten 18 Y (13 lb ft)
7. Install the front tire and wheel assembly. Tire and Wheel Removal and Installation
8. Battery Tray » Install — Battery Tray Replacement
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9. Connect the battery negative cable. Battery Negative Cable Disconnection and Connection
10. Bleed the brake system. Hydraulic Brake System Bleeding
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11. Lower the vehicle.
12. Fill the brake master cylinder reservoir to the maximum-full level with GM approved brake
fluid from a clean, sealed brake fluid container. Brake Master Cylinder Reservoir Filling
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4/26/23, 11:11 AM Brake Pressure Modulator Valve Front Brake Pipe Replacement (Right Side)

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Hydraulic Brakes | Repair Instructions |
Document ID: 5236975

Brake Pressure Modulator Valve Front Brake Pipe

Replacement (Right Side)
Removal Procedure

Warning: The battery must be disconnected to prevent the brake master cylinder from
pressurizing the hydraulic system during its automated self diagnostic tests that can
possibly occur when a door is opened or the key transmitter is activated. Failure to
follow this precaution may cause personal injury.

Warning: Brake Fluid Irritant Warning

Caution: Brake Fluid Effects on Paint and Electrical Components Caution

1. Disconnect the battery negative cable. Battery Negative Cable Disconnection and Connection
2. Dash Panel Outer Insulator » Remove — Dash Panel Outer Insulator Replacement

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3. Battery Tray » Remove — Battery Tray Replacement
4. Raise and support the vehicle. Lifting and Jacking the Vehicle.
5. Remove the front tire and wheel assembly. Tire and Wheel Removal and Installation

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6. Brake Pressure Modulator Valve Front Brake Pipe Fitting (1) @ Brake Pressure Modulator Valve
» Remove
7. Plug the brake pressure modulator valve port to prevent brake fluid loss and contamination.
8. Cap the brake pipe fitting to prevent brake fluid loss and contamination.

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4/26/23, 11:11 AM Brake Pressure Modulator Valve Front Brake Pipe Replacement (Right Side)

9. Brake Pressure Modulator Valve Front Brake Pipe Fitting (1) @ Front Brake Hose (3) » Remove
10. Cap the brake pipe fitting to prevent brake fluid loss and contamination.
11. Front Brake Hose Retainer (2) » Remove

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12. Brake Pressure Modulator Valve Front Brake Pipe Clip (1) » Release
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13. Brake Pressure Modulator Valve Front Brake Pipe Clip (1) » Release [2x]
14. Brake Pressure Modulator Valve Front Brake Pipe (2) @ Vehicle » Remove

Installation Procedure

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4/26/23, 11:11 AM Brake Pressure Modulator Valve Front Brake Pipe Replacement (Right Side)

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1. Brake Pressure Modulator Valve Front Brake Pipe (2) @ Vehicle » Install
2. Brake Pressure Modulator Valve Front Brake Pipe Clip (1) » Secure [2x]

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3. Brake Pressure Modulator Valve Front Brake Pipe Clip (1) » Secure

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4/26/23, 11:11 AM Brake Pressure Modulator Valve Front Brake Pipe Replacement (Right Side)

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4. Front Brake Hose Retainer (2) » Install
Caution: Fastener Caution
5. Brake Pressure Modulator Valve Front Brake Pipe Fitting (1) @ Front Brake Hose (3) » Install
and tighten 18 Y (13 lb ft)

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6. Remove the plug from the brake pressure modulator valve port.
7. Brake Pressure Modulator Valve Front Brake Pipe Fitting (1) @ Brake Pressure Modulator Valve
» Install and tighten 18 Y (13 lb ft)
8. Install the front tire and wheel assembly. Tire and Wheel Removal and Installation
9. Battery Tray » Install — Battery Tray Replacement
10. Dash Panel Outer Insulator » Install — Dash Panel Outer Insulator Replacement
11. Connect the battery negative cable. Battery Negative Cable Disconnection and Connection
12. Bleed the brake system. Hydraulic Brake System Bleeding
13. Lower the vehicle.
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4/26/23, 11:11 AM Brake Pressure Modulator Valve Front Brake Pipe Replacement (Right Side)

14. Fill the brake master cylinder reservoir to the maximum-full level with GM approved brake
fluid from a clean, sealed brake fluid container. Brake Master Cylinder Reservoir Filling

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4/26/23, 11:15 AM Brake Pulsation

2022 Buick Encore GX | | Brakes | Hydraulic Brakes |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5236097

Brake Pulsation
Brake Pulsation

Step Action Yes No

DEFINITION: Fluctuation or pulsation is felt through the brake pedal, steering wheel, seat, floor,
and/or in the vehicle ONLY when braking.

Were you sent here from the Hydraulic Brake Go to Symptoms

1 Symptom table? - Hydraulic
Go to Step 2 Brakes

1. Inspect the disc brake system for the following

conditions.

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Excessive thickness variation of rotor
friction surfaces
Excessive assembled lateral runout
(LRO) of rotor friction surfaces
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Hard spots, heat checks, bluing
discoloration of rotor friction surfaces;
possibly due to brake drag
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Excessive corrosion of rotor friction
surfaces; including red, gray or black
oxidation
2
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Loose, damaged or missing caliper or

lining hardware
Bent or damaged caliper or mounting
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component
Excessive LRO of wheel hub/axle flange;
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due to damage and/or loose or

excessively worn bearings
2. Perform the disc brake system diagnostic
procedure. Disc Brake System Diagnosis
3. Adjust, repair or replace components as
necessary. Go to Symptoms
- Hydraulic
Did you find and correct a condition? Go to Step 3 Brakes

1. Install or connect components that were

removed or disconnected during diagnosis.

3 2. Road test the vehicle in order to confirm

proper operation. Brake System Vehicle Road
Test

Is the condition still present? Go to Step 2 System OK

© 2023 General Motors. All rights reserved.

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4/26/23, 10:35 AM Brake Rotor Assembled Lateral Runout Correction - Indexing

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Disc Brakes | Repair Instructions |
Document ID: 5072578

Brake Rotor Assembled Lateral Runout Correction -

Indexing
Special Tools

CH-45101-100 Conical Brake Rotor Washers

Equivalent regional tools: Special Tools

Warning: Brake Dust Warning

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Note:
Brake rotor thickness variation MUST be checked BEFORE checking for assembled lateral
runout (LRO). Thickness variation exceeding the maximum acceptable level can cause
brake pulsation. Brake Rotor Thickness Variation Measurement
Brake rotor assembled LRO exceeding the maximum allowable specification can cause
thickness variation to develop in the brake rotor over time, usually between 4,800–11,
300 km (3,000–7,000 mi). Brake Rotor Assembled Lateral Runout Measurement
1. Remove the CH-45101-100 Conical Brake Rotor Washers and the lug nuts that were installed during
the assembled LRO measurement procedure.
2. Inspect the mating surface of the hub/axle flange and the brake rotor to ensure that there are no
foreign particles or debris remaining.
3. Index the brake rotor in a different orientation to the hub/axle flange.
4. Hold the rotor firmly in place against the hub/axle flange and install one of the CH-45101-100
Conical Brake Rotor Washers (1) and one lug nut (2) onto the upper-most wheel stud.
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4/26/23, 10:35 AM Brake Rotor Assembled Lateral Runout Correction - Indexing

5. Continue to hold the rotor secure and tighten the lug nut firmly by hand.

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6. Install the remaining CH-45101-100 Conical Brake Rotor Washers (1) and lug nuts (2) onto the
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wheel studs and tighten the nuts firmly by hand in a star-pattern.
7. Tighten the lug nuts (2) in a star-pattern to specification, in order to properly secure the rotor. Tire
and Wheel Removal and Installation
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8. Measure the assembled LRO of the brake rotor. Brake Rotor Assembled Lateral Runout Measurement
9. Compare the amount of change between this measurement and the original measurement.
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10. If this measurement is within specifications, proceed to step 14.

11. If this measurement still exceeds specifications, repeat steps 1–9 until the best assembled LRO
measurement is obtained.
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12. Matchmark the final location of the rotor to the wheel studs if the orientation is different than it was
originally.
13. If the brake rotor assembled LRO measurement still exceeds the maximum allowable specification,
perform Brake Rotor Assembled Lateral Runout Correction.
14. If the brake rotor assembled LRO is within specification, install the brake caliper and depress the
brake pedal several times to secure the rotor in place before removing the CH-45101-100 Conical
Brake Rotor Washers and the lug nuts.

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4/26/23, 10:35 AM Brake Rotor Assembled Lateral Runout Correction - On Vehicle Lathe

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Disc Brakes | Repair Instructions |
Document ID: 5044078

Brake Rotor Assembled Lateral Runout Correction - On

Vehicle Lathe
Special Tools

CH-45101-100 Conical Brake Rotor Washers

Equivalent regional tools: Special Tools.

Warning: Brake Dust Warning

Note:
Brake rotor thickness variation MUST be checked BEFORE checking for assembled lateral
runout (LRO). Thickness variation exceeding the maximum acceptable level can cause
brake pulsation. Brake Rotor Thickness Variation Measurement
Brake rotor assembled LRO exceeding the maximum allowable specification can cause
thickness variation to develop in the brake rotor over time, usually between 4,800–11,300

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km (3,000–7,000 mi). Brake Rotor Assembled Lateral Runout Measurement
This procedure cannot be used on vehicles with ETRS (Electronic Transmission Range
Select).
1. Ensure that the caliper and caliper bracket that are already being supported, are clear from
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contacting any rotating components, such as the brake rotor.
2. Remove the CH-45101-100 Conical Brake Rotor Washers and the lug nuts that were installed during
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the assembled LRO measurement procedure and/or the indexing correction procedure.
3. Inspect the mounting surface of the hub/axle flange and the brake rotor to ensure that there are no
foreign particles or debris remaining.
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4. Set up the lathe, following the manufacturer's instructions.

5. Refinish the brake rotor, following the brake lathe manufacturer's instructions.
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6. After each successive cut, inspect the brake rotor thickness. Brake Rotor Thickness Measurement
7. If at any time the brake rotor exceeds the minimum allowable thickness after refinish specification,
the brake rotor must be replaced. After replacing the rotor, proceed to step 10.
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8. After refinishing the brake rotor, use the following procedure in order to obtain the desired non-
directional finish:
8.1. Follow the brake lathe manufacturer's recommended speed setting for applying a non-
directional finish.
8.2. Using moderate pressure, apply the non-directional finish:
If the lathe is equipped with a non-directional finishing tool, apply the finish with 120-grit
aluminum oxide sandpaper.
If the lathe is not equipped with a non-directional finishing tool, apply the finish with a
sanding block and 150-grit aluminum oxide sandpaper.
8.3. After applying a non-directional finish, clean each friction surface of the brake rotor with
denatured alcohol, or an equivalent approved brake cleaner.
9. Remove the lathe from the vehicle.
10. Measure the assembled LRO of the brake rotor. Brake Rotor Assembled Lateral Runout Measurement
11. If the brake rotor assembled LRO measurement still exceeds the maximum allowable specification,
refer to Brake Rotor Assembled Lateral Runout Correction.
12. If the brake rotor assembled LRO is within specification, install the brake caliper and depress the
brake pedal several times ©
to 2023
secure
General
the rotor
Motors.
in place
Allbefore
rights removing
reserved. the CH-45101-100 Conical

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4/26/23, 10:35 AM Brake Rotor Assembled Lateral Runout Correction - On Vehicle Lathe

Brake Rotor Washers and the lug nuts.

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4/26/23, 10:34 AM Brake Rotor Assembled Lateral Runout Correction

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Disc Brakes | Repair Instructions |
Document ID: 5044074

Brake Rotor Assembled Lateral Runout Correction

Note:

Brake rotor thickness variation MUST be checked BEFORE checking for assembled lateral
runout (LRO). Thickness variation exceeding the maximum acceptable level can cause brake
pulsation. Brake Rotor Thickness Variation Measurement
Brake rotor assembled lateral runout (LRO) exceeding the maximum allowable specification
can cause thickness variation to develop in the brake rotor over time, usually between 4,800-
11,300 km (3,000-7,000 mi). Brake Rotor Assembled Lateral Runout Measurement

Review the following acceptable methods for bringing the brake rotor assembled LRO to within
specifications. Determine which method to use for the specific vehicle being repaired.

The indexing method of correcting assembled LRO is most effective when the LRO specification is
only exceeded by a relatively small amount: 0.025-0.127 mm (0.001-0.005 in). Indexing is used
to achieve the best possible match of high spots to low spots between related components. Brake

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Rotor Assembled Lateral Runout Correction - Indexing
The on-vehicle brake lathe method is used to bring the LRO to within specifications through
compensating for LRO while refinishing the brake rotor. Brake Rotor Assembled Lateral Runout
Correction - On Vehicle Lathe
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If the assembled LRO cannot be corrected using these methods, then other components must be
suspected as causing and/or contributing to the LRO concern.
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4/26/23, 10:42 AM Brake Rotor Assembled Lateral Runout Measurement

2022 Buick Encore GX | | Brakes | Disc Brakes |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5236091

Brake Rotor Assembled Lateral Runout Measurement

Special Tools

CH-41013 Rotor Resurfacing Kit

CH-42450-A Wheel Hub Resurfacing Kit
CH-45101 Hub and Wheel Runout Gauge
CH-45101-100 Conical Brake Rotor Washers

For equivalent regional tools, refer to Special Tools.

Warning: Refer to Brake Dust Warning.

Note:

Brake rotor assembled lateral runout (LRO) exceeding the maximum allowable specification
can cause thickness variation to develop in the brake rotor over time, usually between 4,800–

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11,300 km (3,000–7,000 mi).
Brake rotor thickness variation MUST be checked BEFORE checking for assembled lateral
runout (LRO). Thickness variation exceeding the maximum acceptable level can cause brake
pulsation. Brake Rotor Thickness Variation Measurement
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1. Match-mark the position of the brake rotor to the wheel studs if this has not been done already.
Note: Whenever the brake rotor has been separated from the hub/axle flange, any rust or
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contaminants should be cleaned from the hub/axle flange and the brake rotor mating
surfaces. Failure to do this may result in excessive assembled lateral runout (LRO) of the
brake rotor, which could lead to brake pulsation.
2. Inspect the mating surface of the hub/axle flange and the brake rotor to ensure that there are no
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foreign particles, corrosion, rust, or debris remaining. If the wheel hub/axle flange and/or if the
brake rotor mating surfaces exhibit these conditions, perform the following steps:
2.1. Remove the brake rotor from the vehicle. Front Brake Rotor Replacement and/or Rear Brake
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Rotor Replacement
2.2. Using the CH-42450-A wheel hub resurfacing kit, thoroughly clean any rust or corrosion from
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the mating surface of the hub/axle flange.

2.3. Using the CH-41013 rotor resurfacing kit, thoroughly clean any rust or corrosion from the
mating surface of the brake rotor.
2.4. Clean the friction surfaces of the brake rotor with denatured alcohol, or an equivalent approved
brake cleaner.
3. Install the rotor to the hub/axle flange using the match-mark made prior to removal.

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4/26/23, 10:42 AM Brake Rotor Assembled Lateral Runout Measurement

4. Hold the rotor firmly in place against the hub/axle flange and install one of th CH-45101-100 conical
brake rotor washers (1), and one lug nut (2) onto the upper-most wheel stud.
5. Continue to hold the rotor secure and tighten the lug nut firmly by hand.

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6. Install the remaining CH-45101-100 conical brake rotor washers and lug nuts onto the wheel studs
and tighten the nuts firmly by hand in a star-pattern.
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7. Tighten the lug nuts in a star-pattern to specification. Tire and Wheel Removal and Installation
8. If the brake rotor has been REFINISHED or REPLACED with a new rotor, proceed to step 14.
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9. If the brake rotor meets the following criteria, proceed to step 10.
The rotor is within specifications and is being REUSED.
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The rotor has NOT been refinished.

The rotor does NOT exhibit thickness variation exceeding the maximum allowable level.

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4/26/23, 10:42 AM Brake Rotor Assembled Lateral Runout Measurement

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10. Mount a dial indicator, CH-45101 hub and wheel runout gauge, or equivalent, to the steering
knuckle and position the indicator button so it contacts the brake rotor friction surface at a 90
degree angle, approximately 13 mm (0.5 in) from the outer edge of the rotor.
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11. Measure and record the assembled LRO of the brake rotor.
11.1. Rotate the rotor until the lowest reading is displayed on the indicator dial, then set the dial to
zero.
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11.2. Rotate the rotor until the highest reading is displayed on the dial.
11.3. Mark the location of the high spot relative to the nearest wheel stud, or studs.
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11.4. Measure and record the amount of LRO.

12. Compare the brake rotor assembled LRO to the brake rotor maximum allowable assembled lateral
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runout specification. Disc Brake Component Specifications

13. If the brake rotor assembled LRO is within specifications, proceed to step 18.
If the brake rotor assembled LRO exceeds the specification, refinish the rotor to ensure true
parallelism. Brake Rotor Refinishing After refinishing the rotor, proceed to step 14.
14. Mount a dial indicator, CH-45101 hub and wheel runout gauge, or equivalent, to the steering
knuckle and position the indicator button so it contacts the brake rotor friction surface at a 90
degree angle, approximately 13 mm (0.5 in) from the outer edge of the rotor.
15. Measure and record the assembled LRO of the brake rotor.
15.1. Rotate the rotor until the lowest reading is displayed on the indicator dial, then set the dial to
zero.
15.2. Rotate the rotor until the highest reading is displayed on the dial.
15.3. Mark the location of the high spot relative to the nearest wheel stud, or studs.
15.4. Measure and record the amount of LRO.
16. Compare the brake rotor assembled LRO to the brake rotor maximum allowable assembled lateral
runout specification. Disc Brake Component Specifications
17. If the brake rotor assembled LRO measurement exceeds the specification, bring the LRO to within
specifications. Brake Rotor©Assembled Lateral
2023 General Runout
Motors. AllCorrection
rights reserved.

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4/26/23, 10:42 AM Brake Rotor Assembled Lateral Runout Measurement

18. If the brake rotor assembled LRO measurement is within specification, install the brake caliper and
depress the brake pedal several times to secure the rotor in place before removing the CH-45101-
100 conical brake rotor washers and the lug nuts.

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4/26/23, 10:35 AM Brake Rotor Refinishing

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Disc Brakes | Repair Instructions |
Document ID: 5070804

Brake Rotor Refinishing

Special Tools

CH-41013 Rotor Resurfacing Kit

CH-42450-A Wheel Hub Resurfacing Kit

Equivalent regional tools: Special Tools

The disc brake rotors do not require refinishing as part of routine brake system service. New disc brake
rotors do not require refinishing.

Do not refinish disc brake rotors in an attempt to correct the following conditions:

Brake system noise – squeal, growl, groan

Uneven and/or premature disc brake pad wear
Superficial or cosmetic corrosion/rust of the disc brake rotor friction surface

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Scoring of the disc brake rotor friction surface less than the maximum allowable specification

Before refinishing a brake rotor, the rotor MUST first be checked for adequate thickness to allow the
rotor to be refinished and remain above the minimum allowable thickness after refinish specification.
Brake Rotor Thickness Measurement
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Disc brake rotors should only be refinished if they have adequate thickness to be refinished. A rotor can
be refinished if one or more of the following conditions exists (DO NOT refinish for cosmetic reasons):
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Thickness variation and/or lateral runout are in excess of the maximum allowable specification
Excessive corrosion/rust and/or pitting on the braking surface
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Excessive blueing discoloration and/or heat spots on the braking surface

Scoring of the disc brake rotor surface in excess of the maximum allowable specification
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Disc brake rotors may need to be refinished as part of the process for correcting brake rotor assembled
lateral runout (LRO) that exceeds the maximum allowable specification.
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If the vehicle is equipped with cross-drilled rotors, use a lathe with positive rake tooling. This setup
requires less cutting pressure, which will result in less vibration, and a better surface finish. Also, use a
vibration dampener when cutting. Otherwise, refinish according to the following instructions.

Note: Whenever the brake rotor has been separated from the hub/axle flange, clean any rust or
contaminants from the hub/axle flange and the brake rotor mating surfaces. Failure to do this
may result in increased assembled lateral runout (LRO) of the brake rotor, which could lead to
brake pulsation.
1. Using the CH-42450-A Wheel Hub Resurfacing Kit, thoroughly clean any rust or corrosion from the
mating surface of the hub/axle flange.
2. Using the CH-41013 Rotor Resurfacing Kit, thoroughly clean any rust or corrosion from the mating
surface and mounting surface of the brake rotor.
3. Inspect the mating surfaces of the hub/axle flange and the rotor to ensure that there are no foreign
particles or debris remaining.
4. Mount the brake rotor to the brake lathe according to the lathe manufacturer's instructions, ensuring
that all mounting attachments and adapters are clean and free of debris.
5. Ensure that any vibration dampening attachments are securely in place.
6. With the brake lathe running, slowly bring in the cutting tools until they just contact the brake rotor
friction surfaces. © 2023 General Motors. All rights reserved.

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4/26/23, 10:35 AM Brake Rotor Refinishing

7. Observe the witness mark on the brake rotor. If the witness mark extends approximately three-
quarters or more of the way around the brake rotor friction surface on each side, the brake rotor is
properly mounted to the lathe.
8. If the witness mark does not extend three-quarters or more of the way around the brake rotor, re-
mount the rotor to the lathe.
9. Following the brake lathe manufacturer's instructions, refinish the brake rotor.
10. After each successive cut, inspect the brake rotor thickness. Brake Rotor Thickness Measurement
11. If at any time the brake rotor exceeds the minimum allowable thickness after refinish specification,
the brake rotor must be replaced.
12. After refinishing the brake rotor, use the following procedure in order to obtain the desired non-
directional finish:
12.1. Follow the brake lathe manufacturer's recommended speed setting for applying a non-
directional finish.
12.2. Using moderate pressure, apply the non-directional finish:
If the lathe is equipped with a non-directional finishing tool, apply the finish with 120-grit
aluminum oxide sandpaper.
If the lathe is not equipped with a non-directional finishing tool, apply the finish with a

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sanding block and 150-grit aluminum oxide sandpaper.
Note: Thoroughly cleaning the brake rotor will prevent the possible transfer of finite metal dust
left as a by-product of machining to the brake pad material during the burnishing
process, thereby reducing the possibility for brake squeal or other brake noises to occur.
12.3. After applying a non-directional finish, clean each friction surface of the brake rotor with a
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solution of mild dish washing detergent and water, or a GM approved brake cleaner and a clean
shop towel to remove metal particles remaining from machining. Repeat the cleaning process if
necessary to remove all metal particles.
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13. Remove the brake rotor from the brake lathe.
14. Measure the assembled LRO of the brake rotor to ensure optimum performance of the disc brakes.
Brake Rotor Assembled Lateral Runout Measurement
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15. If the brake rotor assembled LRO measurement exceeds the specification, bring the LRO to within
specifications. Brake Rotor Assembled Lateral Runout Correction
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4/26/23, 10:42 AM Brake Rotor Surface and Wear Inspection

2022 Buick Encore GX | | Brakes | Disc Brakes |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5236090

Brake Rotor Surface and Wear Inspection

Warning: Brake Dust Warning

1. If the inboard friction surface of the brake rotor is not accessible, reposition and support the caliper
with the brake pads. Refer to the following procedures for the necessary steps:
Front Disc Brake Pads Replacement
Rear Disc Brake Pads Replacement
2. Clean the friction surfaces of the brake rotor with denatured alcohol, or an equivalent approved
brake cleaner.
3. Inspect the friction surfaces of the brake rotor for the following Braking Surface Conditions:
Heavy rust and/or pitting
Light surface rust can be removed with an abrasive disc. Heavy surface rust and/or pitting
must be removed by refinishing the rotor.

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Cracks and/or heat spots
Excessive blueing discoloration
4. If the friction surfaces of the brake rotor exhibit one or more of the Braking Surface Conditions, the
rotor requires refinishing or replacement.
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5. Using a micrometer (1) calibrated in thousandths-of-a-millimeter, or ten-thousandths-of-an-inch,

measure and record the scoring depth of any grooves present on the rotor friction surfaces.
6. Compare the groove scoring depth recorded to the brake rotor maximum allowable scoring
specification. Disc Brake Component Specifications
7. If the brake rotor scoring depth exceeds the specification, or if an excessive amount of scoring is
present, the rotor requires refinishing or replacement.
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4/26/23, 10:42 AM Brake Rotor Surface and Wear Inspection

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4/26/23, 10:41 AM Brake Rotor Thickness Measurement

2022 Buick Encore GX | | Brakes | Disc Brakes |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5044416

Brake Rotor Thickness Measurement

Warning: Brake Dust Warning

1. If the inboard friction surface of the brake rotor is not accessible, reposition and support the caliper
with the brake pads. Refer to the following procedures for the necessary steps:
Front Disc Brake Pads Replacement
Rear Disc Brake Pads Replacement
2. Clean the friction surfaces of the brake rotor with denatured alcohol, or an equivalent approved
brake cleaner.

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3. Using a micrometer (1) calibrated in thousandths-of-a-millimeter, or ten-thousandths-of-an-inch,

measure and record the lowest thickness of the brake rotor at 4 or more points, equally spaced
around the rotor.
Ensure that the measurements are only taken within the friction surfaces and that the micrometer is
positioned the same distance from the outside edge of the rotor, about 13 mm (0.50 in), for each
measurement.
4. Compare the lowest thickness measurement recorded to the brake rotor discard thickness
specifications. Disc Brake Component Specifications
5. If the lowest thickness measurement of the brake rotor is above the discard thickness specification,
the brake rotor may be refinished, depending upon surface and wear conditions which may be
present.
6. If the lowest thickness measurement of the brake rotor is at or below the discard thickness
specification, the rotor requires replacement. Refer to the following procedures for the necessary
steps:
Front Brake Rotor Replacement
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4/26/23, 10:41 AM Brake Rotor Thickness Measurement

Rear Brake Rotor Replacement

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4/26/23, 10:41 AM Brake Rotor Thickness Variation Measurement

2022 Buick Encore GX | | Brakes | Disc Brakes |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5236072

Brake Rotor Thickness Variation Measurement

Warning: Refer to Brake Dust Warning.

Note: Any disc brake rotor that exhibits thickness variation exceeding the maximum acceptable level
must be refinished or replaced. Thickness variation exceeding the maximum acceptable level can
cause brake pulsation.

1. If the inboard friction surface of the brake rotor is not accessible, reposition and support the caliper
with the brake pads. Refer to the following procedures for the necessary steps:
Front Disc Brake Pads Replacement
Rear Disc Brake Pads Replacement
2. Clean the friction surfaces of the brake rotor with denatured alcohol, or an equivalent approved
brake cleaner.

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3. Using a micrometer (1) calibrated in thousanths-of-a-millimeter, or ten-thousanths-of-an-inch,

measure and record the thickness of the brake rotor at four or more points, evenly spaced around
the rotor.
Ensure that the measurements are only taken within the friction surfaces and that the micrometer is
positioned the same distance from the outer edge of the rotor, about 13 mm (0.5 in), for each
measurement.
4. Calculate the difference between the highest and lowest thickness measurement recorded to obtain
the amount of thickness variation.
5. Compare the thickness variation measurement to the brake rotor maximum allowable thickness
variation specification. Disc Brake Component Specifications
Note: Whenever a brake rotor is refinished or replaced, the assembled lateral runout (LRO) of the
rotor must be measured to ensure optimum performance of the disc brakes.
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4/26/23, 10:41 AM Brake Rotor Thickness Variation Measurement

6. If the brake rotor thickness variation measurement exceeds the specification, the rotor requires
refinishing or replacement.

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4/26/23, 11:11 AM Brake System Control Module Replacement

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Hydraulic Brakes | Repair Instructions |
Document ID: 5210524

Brake System Control Module Replacement

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Brake System Control Module Replacement

Callout Component Name

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Warning: Brake Fluid Irritant Warning

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Caution: Brake Fluid Effects on Paint and Electrical Components Caution

Caution: Always connect or disconnect the wiring harness connector from the EBCM/EBTCM
with the ignition switch in the OFF position. Failure to observe this precaution could
result in damage to the EBCM/EBTCM.
Preliminary Procedure
Brake Master Cylinder Replacement - With Power Brake Booster and Electronic Brake Control
Module

Electronic Brake Control Module Bolt [4x]

Caution: Fastener Caution
1
Tighten
3 Y (27 lb in)

2 Electronic Brake Control Module

Procedure

1. Program the electronic brake control module. Control Module References

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4/26/23, 11:11 AM Brake System Control Module Replacement

Callout Component Name

2. Bleed the brake system. Hydraulic Brake System Bleeding

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4/26/23, 11:16 AM Brake System External Leak Inspection

2022 Buick Encore GX | | Brakes | Hydraulic Brakes |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5236111

Brake System External Leak Inspection

Warning: Brake Fluid Irritant Warning.

Caution: Brake Fluid Effects on Paint and Electrical Components Caution.

1. In order to inspect for external brake fluid leaks, first check the fluid level in the master cylinder.
While a slight brake fluid level drop can be considered a normal condition due to brake lining wear, a
very low level may indicate a brake fluid leak in the hydraulic system.
If the fluid level is abnormally low, adjust the brake fluid level. Brake Master Cylinder Reservoir
Filling
2. Start the engine and allow it to idle.
3. Apply constant, moderate foot pressure to the brake pedal.
If the brake pedal gradually falls away while under foot pressure, there may be a brake fluid leak.
4. Turn OFF the ignition.

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5. Visually inspect the following brake system components for brake fluid leaks, excessive corrosion,
and damage. Give particular attention to all brake pipe and flexible hose connections to ensure that
there are not any slight brake fluid leaks – even though the brake pedal may feel firm and hold
steady:
Master cylinder brake pipe fittings
All brake pipe connections
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Brake pipes
Brake hoses and connections
Brake calipers
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6. While slight dampness around the master cylinder reservoir can be considered acceptable, brake
fluid leaking from any of the brake system components requires immediate attention. If any of
these components exhibit signs of brake fluid leakage, repair or replace those components. After the
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repair or replacement, reinspect the hydraulic brake system to assure proper function.
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4/26/23, 11:15 AM Brake System Noise

2022 Buick Encore GX | | Brakes | Hydraulic Brakes |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5236098

Brake System Noise

Brake System Noise

Step Action Yes No

DEFINITION: Vehicle exhibits abnormal noise when braking; vehicle may exhibit abnormal noise
during motion just after brake pedal release.

Were you sent here from the Hydraulic Brake Go to Diagnostic

1 Symptom table? Go to Step 2 Starting Point -
Vehicle

1. Inspect the disc brake system for the following

conditions.

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Lining wear indicator contact with rotor
Debris trapped between rotor and splash
shield or backing plate; and/or debris
trapped between rotor and linings
Contaminated linings
Aftermarket linings
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Glazed linings
Distorted, cracked or damaged linings
Excessively worn linings
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Damaged or excessively worn caliper

hardware and/or lining hardware
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2 Incorrectly installed, loose or missing Go to Step 6 Go to Step 3

caliper hardware and/or lining hardware
Lack of lubrication or excessive
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corrosion on metal to metal contact

surfaces
Bent or damaged splash shield or
backing plate
Hard spots, heat checks, blueing
discoloration of rotor friction surfaces
Glazed rotor friction surfaces
Bent or damaged caliper or mounting
component
2. Adjust, repair or replace components as
necessary. Disc Brake System Diagnosis

Did you find and correct a condition?

3 Go to Step 6 Go to Step 4
1. Inspect the brake assist system for the
following conditions.
Lack of lubrication or excessively worn
© 2023
pushrod or pedal General
pivots Motors. All rights reserved.
or pivot

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4/26/23, 11:15 AM Brake System Noise

Step Action Yes No

bushings
Bent or damaged pedal pushrod, pedal,
or pedal bracket
2. Adjust, repair or replace components as
necessary.

Did you find and correct a condition?

1. Inspect the hydraulic brake system for the

following conditions.
Improper operation of caliper pistons
4 Contaminated brake fluid Go to Step 6 Go to Step 5
2. Adjust, repair or replace components as
necessary. Hydraulic Brake System Diagnosis

Did you find and correct a condition?

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Inspect the park brake system for proper Go to Diagnostic
5 operation. Park Brake System Diagnosis Go to Step 6 Starting Point -
Did you find and correct a condition? Vehicle
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1. Install or connect components that were
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removed or disconnected during diagnosis.

6 2. Road test the vehicle in order to confirm Go to Step 2 System OK

proper operation. Brake System Vehicle Road
Test
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Is the condition still present?

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4/26/23, 11:16 AM Brake System Slow Release

2022 Buick Encore GX | | Brakes | Hydraulic Brakes |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5236104

Brake System Slow Release

Brake System Slow Release

Step Action Yes No

DEFINITION: Brake system releases and returns to rest slowly; vehicle motion is hindered by
brake system briefly after release of brake pedal.

Were you sent here from the Hydraulic Brake Go to Diagnostic

1 Symptom table? Go to Step 2 Starting Point -
Vehicle

1. Inspect the hydraulic brake system for the

following conditions:

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Improper operation of caliper pistons
Internally damaged flexible brake
hoses; hindering brake release
2 Contaminated brake fluid Go to Step 5 Go to Step 3
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Damaged or improperly operating
master cylinder
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2. Adjust, repair or replace components as
necessary. Hydraulic Brake System Diagnosis

Did you find and correct a condition?

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1. Inspect the brake assist system for the

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following conditions:
Binding, bent or damaged pedal
pushrod, pedal, or pedal bracket
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Damaged or improperly operating

vacuum booster, if equipped
3 Restricted return hose from hydraulic Go to Step 5 Go to Step 4
booster, if equipped
Damaged or improperly operating
hydraulic booster, if equipped
2. Adjust, repair or replace components as
necessary.

Did you find and correct a condition?

4 Go to Step 5 Go to Diagnostic
1. Inspect the disc brake system for the following Starting Point -
conditions: Vehicle
Damaged or excessively worn caliper
hardware and/or lining hardware
Distorted or damaged linings
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4/26/23, 11:16 AM Brake System Slow Release

Step Action Yes No

Lack of lubrication or excessive

corrosion on metal to metal contact
surfaces
Bent or damaged caliper or mounting
component
2. Adjust, repair or replace components as
necessary. Disc Brake System Diagnosis

Did you find and correct a condition?

1. Install or connect components that were

removed or disconnected during diagnosis.

5 2. Road test the vehicle in order to confirm Go to Step 2 System OK

proper operation. Brake System Vehicle Road
Test

Is the condition still present?

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4/26/23, 11:13 AM Brake System Specifications

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Hydraulic Brakes | Specifications |
Document ID: 5284889

Brake System Specifications

Brake System Specifications

Specification

Application Metric English

Brake Pedal Travel

Maximum specification with 400 N (90 lbs) of 61 mm 2.4 in

force applied to the pedal with the ignition OFF.

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4/26/23, 11:16 AM Brake System Vehicle Road Test

2022 Buick Encore GX | | Brakes | Hydraulic Brakes |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5236109

Brake System Vehicle Road Test

Preliminary Inspections

1. Visually inspect easily accessible brake system components for obvious damage and/or leaks
which may indicate that the vehicle should not be driven until further inspections have been
completed.
2. Inspect the brake master cylinder reservoir fluid level and adjust only if necessary for brake
system road testing. Brake Master Cylinder Reservoir Filling
3. Inspect the tire inflation pressures and adjust as necessary.
4. Inspect the tire tread patterns to ensure that they are the same or very similar, especially per
axle.
5. Ensure that the vehicle is not loaded unevenly prior to brake system road testing.

Road Testing Procedure

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Warning: Road test a vehicle under safe conditions and while obeying all traffic laws. Do not
attempt any maneuvers that could jeopardize vehicle control. Failure to adhere to these
precautions could lead to serious personal injury and vehicle damage.

1. Start the engine and allow it to idle.

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2. Check to see if the brake system warning lamp remains illuminated.
3. If the brake system warning lamp remains illuminated, DO NOT proceed to test drive the
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vehicle until it is diagnosed and repaired. Symptoms - Hydraulic Brakes
4. Select a smooth, dry, clean and level road or large lot that is as free of traffic and obstacles as
possible for brake system low speed road testing.
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5. With the transmission in PARK, lightly apply the brake pedal. Observe both the pedal feel and
the pedal travel.
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6. If the brake pedal apply felt spongy, or the pedal travel was excessive, DO NOT drive the
vehicle until it is repaired.
7. If the brake pedal apply did not feel spongy and the pedal travel was not excessive, proceed to
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step 8.
8. Release and apply the brakes.
9. While continuing to apply the brakes, shift the transmission into DRIVE, release the brakes
and allow the engine to idle the vehicle away from the stopped position. Observe for a slow
release of the brake system.
10. With the aid of an assistant to observe the vehicle's performance from outside of the vehicle,
drive the vehicle at a low speed and lightly apply the brakes while driving past the assistant.
Have the assistant observe for brake system noise from the side of the vehicle closest to
them, while you observe both the pedal effort and the pedal travel.
11. If the brake pedal apply effort was excessive, or the pedal travel was excessive, DO NOT
continue to test drive the vehicle until it is repaired.
12. If the brake pedal apply effort was not excessive and the pedal travel was not excessive,
proceed to step 13.
13. Drive the vehicle in the opposite direction, at the same low speed and lightly apply the brakes
while driving past the assistant. Have the assistant observe for brake system noise from the
side of the vehicle closest to him.
14. Drive the vehicle at a low speed and shift the transmission into NEUTRAL without applying the
brakes. Observe for ©a rapid
2023 deceleration
General Motors.
in vehicle
All rights
speed,
reserved.
indicating possible brake drag.

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4/26/23, 11:16 AM Brake System Vehicle Road Test

15. Select a smooth, dry, clean and level road that is as free of heavy traffic as possible for brake
system moderate speed road testing.
16. Drive the vehicle at a moderate speed. Observe for a pull and/or incorrect tracking of the
vehicle without the brakes applied.
17. While continuing to drive the vehicle at a moderate speed, perform several light applies of the
brakes. Observe the pedal effort and the pedal travel, observe for brake system noise,
pulsation and/or brake drag.
18. If the brake pedal apply effort was excessive, or the pedal travel was excessive, DO NOT
continue to test drive the vehicle until it is repaired.
19. If the brake pedal apply effort was not excessive and the pedal travel was not excessive,
proceed to step 20.
20. While continuing to drive the vehicle at a moderate speed, perform several moderate applies
of the brakes. Observe the pedal effort and the pedal travel, observe for brake system
pulsation and/or uneven braking action – either side to side, or front to rear.
A small amount of vehicle front end dip is expected during a moderate apply of the brakes.
21. If the brake pedal apply effort was excessive, or the pedal travel was excessive, DO NOT
continue to test drive the vehicle until it is repaired.

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4/26/23, 11:15 AM Brake Warning Indicator Malfunction

2022 Buick Encore GX | | Brakes | Hydraulic Brakes |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 4991764

Brake Warning Indicator Malfunction

Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C0049 Low Brake Fluid Indicated

Symptom Byte Information: Symptom Byte List

Diagnostic Fault Information

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Circuit Short to Open/High Short to Signal
Circuit Function Ground Resistance Voltage Performance

333

1151
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Ground
C0049 00

—
C004B 15

C004B 15
C004B 15

—
—

—
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Scan Tool Data
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Brake Fluid Level Switch

Normal
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Control Module Data List Values Operation

The parameter
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Hydraulic Brakes will display low

K160 Brake System Control Module V
Data voltage with low
brake fluid

Circuit/System Description

The B20 Brake Fluid Level Switch is a normally open switch that closes when the brake fluid is
below the minimum level. The switch is magnetically actuated by a float. The K160 Brake System
Control Module monitors the switch on signal circuit 333 and the switch receives a constant
ground on ground circuit 1151.

Conditions for Running the DTC

Ignition/Vehicle = ON

Conditions for Setting the DTC

Brake Fluid Level Indicator Switch = Low — For greater than 5 s

Ground circuit = open
Signal circuit = open /Short
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4/26/23, 11:15 AM Brake Warning Indicator Malfunction

Actions Taken When the DTC Sets

Brake warning indicator malfunction. = ON

ABS Warning Indicator = ON
Traction/Stability Control Indicator = ON
Hill Descent Control = ON
Brake Assist = None
A message and/or warning indicator may be displayed to the driver.

Conditions for Clearing the DTC

The conditions for setting the DTC no longer exist.

Reference Information
Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

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Master Electrical Component List

Electrical Information Reference

Circuit Testing
Connector Repairs
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Testing for Intermittent Conditions and Poor Connections
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Wiring Repairs

Scan Tool Reference

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Control Module References

Circuit/System Verification
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1. Ignition/Vehicle » Off
2. Verify the condition does not exist: Incorrect fluid level or condition
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⇒ If a condition exists
Repair or replace as necessary
⇓ If no condition exists
3. Refer to Circuit/System Testing.

Circuit/System Testing

1. Ignition OFF, disconnect the connector at the B20 Brake Fluid Level Switch.
2. Verify a test lamp illuminates between ground terminal 2 and B+
⇒ If the test lamp does not illuminate
Repair the open/high resistance on circuit 1151 or the ground connection.
⇓ If the test lamp illuminates
3. Verify the scan tool Brake Fluid Level Switch parameter is greater than 10 V
⇒ If the parameter is less than 10 V
3.1. Test circuit 333 for a short to ground.
⇒ If a short to ground is found,
© 2023 repair
General the fault
Motors. on thereserved.
All rights circuit.

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4/26/23, 11:15 AM Brake Warning Indicator Malfunction

⇓ If a short to ground is not found

3.2. Replace the K160 Brake System Control Module.
⇓ If the parameter is greater than 10 V
4. Connect a 3 A fused jumper wire between signal terminal 1 and ground terminal 2.
5. Verify the scan tool Brake Fluid Level Switch parameter is less than 1 V.
⇒ If the parameter is 1 V or greater
5.1. Test circuit 333 for a short to voltage.
⇒ If an short to voltage is found, repair the fault on the circuit.
⇓ If a short to voltage is found is not found
5.2. Test circuit 333 for an open/high resistance.
⇒ If an open/high resistance is found, repair the fault on the circuit.
⇓ If a open/high resistance is not found
5.3. Replace the K160 Brake System Control Module.
⇓ If the parameter is less than 1 V
6. Replace the B20 Brake Fluid Level Switch.

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Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
Verification
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For control module replacement, programming, and setup refer to: Control Module
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References
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4/26/23, 11:16 AM Brakes Drag

2022 Buick Encore GX | | Brakes | Hydraulic Brakes |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5236103

Brakes Drag
Brakes Drag

Step Action Yes No

DEFINITION: Brake system does not fully release or has delayed release; vehicle motion may be
hindered by brake system without applying brakes.

Were you sent here from the Hydraulic Brake Go to Diagnostic

1 Symptom table? Starting Point -
Go to Step 2 Vehicle

Inspect the park brake system for proper

2 operation. Park Brake System Diagnosis
Did you find and correct a condition? Go to Step 7 Go to Step 3

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1. Inspect the disc brake system for the following
conditions:

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Binding, incorrectly installed or missing
caliper hardware and/or lining hardware
—Ensure free movement of linings and
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of caliper, if equipped with sliding type
caliper
Lack of lubrication or excessive
corrosion on metal to metal contact
ia

3 surfaces
Distorted or damaged linings
rd

Damaged or excessively worn caliper

hardware and/or lining hardware
Bent or damaged caliper or mounting
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component
2. Adjust, repair or replace components as
necessary. Disc Brake System Diagnosis

Did you find and correct a condition? Go to Step 7 Go to Step 4

1. Separate the brake booster pushrod from the

brake pedal.
2. Inspect the brake corners to determine if the
4
brake drag condition is still present.

Do the brake corners still exhibit the brake drag

condition? Go to Step 6 Go to Step 5

5 Go to Step 7 —
1. Inspect the pushrod for improper positioning
and/or damage. Correctly position or replace
the pushrod if necessary.
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4/26/23, 11:16 AM Brakes Drag

Step Action Yes No

2. Inspect the brake pedal assembly for damage

and replace if necessary.

Did you complete the repair or replacement?

1. Inspect the hydraulic brake system for the

following conditions.
Improper operation of caliper pistons
Contaminated brake fluid
Internally damaged flexible brake
6 hoses; hindering brake release
Damaged or improperly operating
master cylinder
2. Adjust, repair or replace components as
necessary. Hydraulic Brake System Diagnosis Go to Diagnostic
Starting Point -

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Did you find and correct a condition? Go to Step 7 Vehicle

1. Install or connect components that were

removed or disconnected during diagnosis.

7
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2. Road test the vehicle in order to confirm
proper operation. Brake System Vehicle Road
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Test

Is the condition still present? Go to Step 2 System OK

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rd
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4/26/23, 11:15 AM Braking Action Uneven - Front to Rear

2022 Buick Encore GX | | Brakes | Hydraulic Brakes |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5236100

Braking Action Uneven - Front to Rear

Test Descriptions

The number below refers to the step number on the diagnostic table.

4. Suspension components that are not operating properly may cause a disturbance to the
vehicle during application of the brake system.

Braking Action Uneven - Front to Rear

Step Action Yes No

DEFINITION: Braking action or stopping force sensitive or grabbing and/or more pronounced at
the front or at the rear axle. Sensitive or grabbing brakes: Excessive brake jump-in force
relative to brake pedal input.

om
Were you sent here from the Hydraulic Brake Go to Diagnostic
1 Symptom table? Go to Step 2 Starting Point -
Vehicle

.c
1. Inspect the hydraulic brake system for the
following conditions:
gn
Improper operation of caliper pistons
Kinked, pinched or damaged brake pipe
or flexible brake hose
ia

Brake fluid leak

2 Improperly functioning proportion valve, Go to Step 6 Go to Step 3
rd

if equipped
Improper operation of dynamic rear
proportion (DRP) system, if equipped
ca

2. Adjust, repair or replace components as

necessary. Hydraulic Brake System Diagnosis

Did you find and correct a condition?

3 Go to Step 6 Go to Step 4
1. Inspect the disc brake system for the following
conditions:
Contaminated linings
Glazed linings
Distorted, cracked or damaged linings
Excessively worn linings
Aftermarket linings
Damaged or excessively worn caliper
hardware and/or lining hardware
Hard spots, heat checks, blueing
discoloration of rotor friction surfaces
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4/26/23, 11:15 AM Braking Action Uneven - Front to Rear

Step Action Yes No

Glazed rotor friction surfaces

2. Adjust, repair or replace components as
necessary. Disc Brake System Diagnosis

Did you find and correct a condition?

1. Inspect the suspension system for the

following conditions:
Loose suspension component
connections
4 Excessively worn or damaged Go to Step 6 Go to Step 5
suspension components
2. Adjust, repair or replace components as
necessary. Diagnostic Starting Point - Vehicle

Did you find and correct a condition?

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1. Inspect the brake assist system for the
following conditions:
Binding, bent or damaged pedal
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pushrod, pedal, or pedal bracket
Damaged or improperly operating
vacuum booster, if equipped
Go to Diagnostic
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5 Go to Step 6 Starting Point -
Damaged or improperly operating Vehicle
hydraulic booster, if equipped
2. Adjust, repair or replace components as
ia

necessary.

Did you find and correct a condition?

rd

1. Install or connect components that were

ca

removed or disconnected during diagnosis.

6 2. Road test the vehicle in order to confirm Go to Step 2 System OK

proper operation. Brake System Vehicle Road
Test

Is the condition still present?

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4/26/23, 11:15 AM Braking Action Uneven - Pulls to One Side

2022 Buick Encore GX | | Brakes | Hydraulic Brakes |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5236099

Braking Action Uneven - Pulls to One Side

Test Description

The numbers below refer to the step numbers on the diagnostic table.

4. Suspension components that are not operating properly may cause a disturbance to the
vehicle during application of the brake system.
5. Steering components that are not operating properly may cause a disturbance to the vehicle
during application of the brake system.

Braking Action Uneven - Pulls to One Side

Step Action Yes No

DEFINITION: Vehicle pulls to one side only when braking.

om
Were you sent here from the Hydraulic Brake Go to Diagnostic
1 Symptom table? Starting Point -
Go to Step 2 Vehicle

.c
1. Inspect the hydraulic brake system for the
following conditions.
gn
Kinked, pinched or damaged brake pipe
or flexible brake hose
Sticking or improperly operating caliper
ia

2
piston
Brake fluid leak
rd

2. Adjust, repair or replace components as

necessary. Hydraulic Brake System Diagnosis
ca

Did you find and correct a condition? Go to Step 6 Go to Step 3

3 Go to Step 6 Go to Step 4
1. Inspect the disc brake system for the following
conditions.
Contaminated linings
Glazed linings
Distorted, cracked or damaged linings
on one side
Loose, damaged or missing caliper
hardware and/or lining hardware
Incorrect linings on one side
Hard spots, heat checks, blueing
discoloration of rotor friction surfaces;
possibly due to brake drag
Glazed rotor friction surfaces
Bent or damaged caliper or mounting
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4/26/23, 11:15 AM Braking Action Uneven - Pulls to One Side

Step Action Yes No

2. Adjust, repair or replace components as

necessary. Disc Brake System Diagnosis

Did you find and correct a condition?

1. Inspect the suspension system for the

following conditions.
Incorrect tire pressures
Loose suspension component
connections
4
Excessively worn or damaged
suspension components
2. Adjust, repair or replace components as
necessary. Diagnostic Starting Point - Vehicle

Did you find and correct a condition? Go to Step 6 Go to Step 5

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1. Inspect the steering system for the following
conditions.
Loose steering component connections

5
components
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Excessively worn or damaged steering
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2. Adjust, repair or replace components as
necessary. Diagnostic Starting Point - Vehicle Go to Diagnostic
Starting Point -
Did you find and correct a condition? Go to Step 6 Vehicle
ia

1. Install or connect components that were

rd

removed or disconnected during diagnosis.

2. Road test the vehicle in order to confirm
6
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proper operation. Brake System Vehicle Road

Test

Is the condition still present? Go to Step 2 System OK

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4/26/23, 10:46 AM Device Control Limits Exceeded Error

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Antilock Brake System | Repair Instructions |
Document ID: 5181533

Device Control Limits Exceeded Error

Device Control Limits Exceeded Error
Description Corrective Action

Reason
System has not exited active brake system
during procedure.
Action Taken

System Currently Active 1. Ignition/Vehicle » Off — For greater than 5

s
2. Ignition » On / Vehicle » In Service Mode
— For greater than 10 s
3. Ensure brake pedal is fully returned.

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Reason
Engine control Module indicating Propulsion is
active

Propulsion System Active

.c Action Taken

1. Ignition/Vehicle » Off
gn
2. Open and close the door.
3. Wait for greater than 2 min.
4. Ignition » On / Vehicle » In Service Mode
ia
rd

Reason
Brake System Control Module overheated
Action Taken
Over temperature condition
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1. Allow 20 min for Brake System Control

Module to cool down.

Reason
Any wheel speed sensor over 3kph (2mph)
Action Taken

Wheel Speed Detected 1. Wheel Speed Sensors should be 0 when

vehicle is not moving.
2. Determine why Wheel Speed Sensor is
greater than 0 when vehicle is not moving.

ABS Solenoid Valves or Pump Motor Timer Reason

Exceeded Various tests have timed out
Action Taken

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4/26/23, 10:46 AM Device Control Limits Exceeded Error

Device Control Limits Exceeded Error

Description Corrective Action

1. Ignition/Vehicle » Off — For greater than

10 min
2. Ensure system is filled and bled adequately
with no leaks
3. When performing learn procedures, follow
the scan tool instructions

Reason
Voltage at Brake System Control Module
connector must be 8.5 – 16.8v
Action Taken
Voltage Out Of Range 1. Ignition/Vehicle » Off
2. Connect a battery charger to the battery..
3. Inspect Brake System Control Module fuses

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and connector.

Reason
.c 1. There is a DTC set
2. Learn procedures not completed
gn
Internal Malfunction 3. Hydraulic Operation has not been enabled

Action Taken
ia

1. If any DTC is set Refer to: Diagnostic

Trouble Code (DTC) List - Vehicle
rd

Reason
Brake pedal applied
ca

Action Taken

1. Remove foot from brake and ensure pedal

is returned
Brake Pedal Applied
2. The Calculated Input Rod Position should
not be greater than 0.3mm when brake
pedal is returned.
3. Determine why brake pedal is not
returning.

Conditions Not Correct Reason

Brake Fluid Level Sensor was not disconnected
Action Taken

1. Disconnect Brake Fluid Level Sensor

connector.
2. The DTC "C0049 Low Brake Fluid Level
© 2023 General Motors. Sensor Circuit
All rights Open", will show if the
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4/26/23, 10:46 AM Device Control Limits Exceeded Error

Device Control Limits Exceeded Error

Description Corrective Action

Brake Fluid Level Sensor connector is

disconnected.

om
.c
gn
ia
rd
ca

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4/26/23, 11:05 AM Disc Brake Component Specifications

2022 Buick Encore GX | |

Encore GX Service Manual N America 14739426 Brakes | Disc Brakes | Specifications |
Document ID: 5236071

Disc Brake Component Specifications

Disc Brake Component Specifications

Specification

Application Metric English

Front Brakes

Brake Pad Lining Thickness - Minimum 2.0 mm 0.079 in

Brake Pad Lining Thickness - New 12.0 mm 0.472 in

Brake Rotor Diameter 300.0 mm 11.811 in

om
Brake Rotor Discard Thickness 23.0 mm 0.906 in

Brake Rotor Maximum Allowable Assembled Lateral

0.05 mm 0.002 in
Runout

Brake Rotor Maximum Allowable Scoring

.c 1.5 mm 0.059 in
gn
Brake Rotor Maximum Allowable Thickness Variation
0.006 mm 0.0002 in
(NFNC)
ia

Brake Rotor Maximum Allowable Thickness Variation

0.009 mm 0.0003 in
(FNC)
rd

Brake Rotor Minimum Allowable Thickness After

23.2 mm 0.913 in
Refinish
ca

Brake Rotor Thickness - New 26.0 mm 1.024 in

Rear Brakes

Brake Pad Lining Thickness - Minimum 1.5 mm 0.059 in

Brake Pad Lining Thickness - New 10.0 mm 0.394 in

Brake Rotor Diameter 264.0 mm 10.394 in

Brake Rotor Discard Thickness 8.0 mm 0.315 in

Brake Rotor Maximum Allowable Assembled Lateral

0.05 mm 0.002 in
Runout

Brake Rotor Maximum Allowable Scoring 1.5 mm 0.059 in

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4/26/23, 11:05 AM Disc Brake Component Specifications

Specification

Application Metric English

Brake Rotor Maximum Allowable Thickness Variation

0.006 mm 0.0002 in
(NFNC)

Brake Rotor Maximum Allowable Thickness Variation

0.009 mm 0.0003 in
(FNC)

Brake Rotor Minimum Allowable Thickness After

8.2 mm 0.323 in
Refinish

Brake Rotor Thickness - New 10.0 mm 0.394 in

om
.c
gn
ia
rd
ca

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4/26/23, 11:06 AM Disc Brake Schematics

2022 Buick Encore GX | Encore GX Service Manual N America 14739426 | Brakes | Disc Brakes | Schematic and Routing Diagrams | Document ID: 5674989

Disc Brake Schematics

Brake Pad Monitoring

K9 P16 L
Body P9 Instrument O
Control Cluster C
Driver Information
Module Center Display
D
E
A90 S
C
Logic

K160
Brake
System
Control
Module
35 40

om
1602 1610
BN/BU GY/VT

1 1

1
.c 2
1.78k
3
4.87k
B172LF
Brake Pad
Wear
Sensor -
Left Front
1 2
1.78k
3
4.87k
B172RR
Brake Pad
Wear
Sensor -
Right Rear
gn
2 2
250 4451
ia

BK BK/WH
rd

G102 G400
ca

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4/26/23, 10:36 AM Disc Brake System Description and Operation

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Disc Brakes | Description and Operation |
Document ID: 5044019

Disc Brake System Description and Operation

System Component Description

The disc brake system consists of the following components:

Disc Brake Pads Applies mechanical output force from the hydraulic brake calipers to friction
surfaces of brake rotors.

Disc Brake Rotors Uses mechanical output force applied to friction surfaces from the disc brake
pads to slow speed of tire and wheel assembly rotation.

Disc Brake Pad Hardware Secures disc brake pads firmly in proper relationship to the hydraulic
brake calipers. Enables a sliding motion of brake pads when
mechanical output force is applied.

Disc Brake Caliper Hardware (Floating Caliper) Provides mounting for hydraulic brake

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caliper and secures the caliper firmly in
proper relationship to caliper bracket. Enables a sliding motion of the brake caliper to the
brake pads when mechanical output force is applied.

System Operation (Floating Caliper)

.c
Mechanical output force is applied from the hydraulic brake caliper pistons to the inner brake
pads. As the pistons press the inner brake pads outward, the caliper housings draw the outer
brake pads inward. This allows the output force to be equally distributed. The brake pads apply
gn
the output force to the friction surfaces on both sides of the brake rotors, which slows the rotation
of the tire and wheel assemblies. The correct function of both the brake pad and brake caliper
hardware is essential for even distribution of braking force.
ia

System Operation (Fixed Caliper)

Mechanical output force is applied from the hydraulic brake caliper inboard and outboard pistons
rd

to the inner and outer brake pads. The brake calipers are a fixed, opposed-piston design, allowing
the output force to be equally distributed through the distribution of the pressurized brake fluid
within the caliper. The brake pads apply the output force to the friction surfaces on both sides of
ca

the brake rotors, which slows the rotation of the tire and wheel assemblies. The correct function
of the brake pad hardware and of the brake caliper inboard and outboard pistons is essential for
even distribution of braking force.

System Characteristics

Brake Noise

Brake noise can occur and to a degree, some brake noise is normal. Variations in driving
conditions such as the weather, environment, driving patterns, differences in vehicle loading, and
type or style of driving, can affect brake wear. Any one of these variations can cause brake noise
to become apparent. Inspect and verify that all metal-to-metal contact areas of the brake pads,
brake pad guides or springs, brake caliper housing, caliper bracket and/or suspension knuckle, as
applicable, are clean and free of corrosion and scale.

Brake noise is a “slip-stick” vibration of disc brake components and, if it occurs intermittently, can
be considered normal. Most brake noise may be eliminated or temporarily reduced by performing
3 or 4 aggressive brake applications. If the brake noise persists or consistently recurs, application
of a damping compound to the brake pad mounting plate where it contacts the caliper can lessen
the vibration as the components move relative to each other. Refer to Adhesives, Fluids,
Lubricants, and Sealers in this section for recommended compounds.
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4/26/23, 10:36 AM Disc Brake System Description and Operation

The following brake noises are characteristic of all brake systems. These noises cannot be
avoided, and may not indicate improper operation of the brake system.

Squeak/Squeal Noise

A squeak or squeal noise can occur on vehicles with front semi-metalic brake pads during light to
medium brake pedal application at low to moderate vehicle speeds. Occasionally this noise may
appear from the front or rear brakes after a period of non-use such as overnight, or cold brakes
and/or in high humidity conditions.

Grinding Noise

Common occurrence for rear brakes and some front disc brakes during initial brake applications
after the vehicle has been parked overnight. Caused by light corrosion forming on the metal brake
component friction surfaces during vehicle non-use. Typically disappears after the first few brake
applications.

Groan Noise

A groan type noise may be heard during a quick stop, or when slowly moving forward from a
complete stop. On vehicles equipped with antilock brake systems (ABS), a groan or moan noise
may occur during heavy brake application or on road surfaces with compromised traction such as

om
loose gravel, or on wet or icy roads. This is a normal function of ABS activation.

.c
gn
ia
rd
ca

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4/26/23, 11:16 AM Disc Brake System Diagnosis

2022 Buick Encore GX | | Brakes | Hydraulic Brakes |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5236106

Disc Brake System Diagnosis

Test Description

The numbers below refer to the step numbers on the diagnostic table:

9. Lubricant leaks from non-brake system components may come in contact with and
contaminate brake system components.
10. Lubricant leaks from non-brake system components may come in contact with and
contaminate brake system components.
12. Disc brake rotor shields/backing plates that come in contact with disc brake rotors may
cause brake system noise.

15. Disc brake rotor thickness variation that exceeds the maximum acceptable level can cause
brake pulsation.

19. Disc brake rotor thickness variation that exceeds the maximum acceptable level can cause

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brake pulsation.

22. Disc brake rotor assembled lateral runout (LRO) that exceeds the maximum acceptable level
can lead to thickness variation.

Step Action
.c
Disc Brake System Diagnosis

Yes No
gn
DEFINITION: This diagnostic table is designed to diagnose ONLY the components of the DISC
brake system in order to determine if the DISC brake system is operating properly. You will be
directed by the appropriate Symptom table to go to other brake system diagnostic tables as
ia

appropriate.
rd

Were you sent here from a Brake Symptom table? Go to Diagnostic

1 Go to Step 2 Starting Point -
Vehicle
ca

Visually inspect the disc brake pads for the

following conditions:
Brake Pad Inspection.

Lining thickness below specifications

Uneven and/or abnormal wear – edge-to-
edge and/or side-to-side
2 Go to Step 3 Go to Step 12
Looseness or damage – including pad
hardware
Evidence of contamination from an external
substance

Did you find any conditions to indicate a concern

with any of the front and/or rear disc brake pads?

Are any of the front and/or rear disc brake pads

3 Go to Step 8 Go to Step 4
contaminated?
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4/26/23, 11:16 AM Disc Brake System Diagnosis

Step Action Yes No

Are any of the front and/or rear disc brake pads

4 Go to Step 7 Go to Step 5
worn unevenly?

Are any of the front and/or rear disc brake pads

5 Go to Step 7 Go to Step 6
and/or pad hardware loose or damaged?

1. Remove and inspect the worn disc brake pads

for glazing, looseness, heat spots or damage.
2. Replace the worn disc brake pads as a
6 complete axle set. Go to Step 12 —
Front Disc Brake Pads Replacement
Rear Disc Brake Pads Replacement

Did you complete the inspection and replacement?

om
7 Go to Step 12 —
Caution: Support the brake caliper with
heavy mechanic wire, or equivalent,
whenever it is separated from its
mount and the hydraulic flexible
.c
brake hose is still connected. Failure
to support the caliper in this manner
will cause the flexible brake hose to
gn
bear the weight of the caliper, which
may cause damage to the brake
hose and in turn may cause a brake
fluid leak.
ia

Note: Do NOT disconnect the hydraulic brake

flex hoses from the calipers.
1. Remove the front and/or rear disc brake
rd

calipers, as appropriate, from the mounting

brackets and support the calipers.
ca

Front Brake Caliper Replacement

Rear Brake Caliper Replacement
2. Inspect the disc brake caliper mounting
bracket and the mounting/sliding hardware.
Front Disc Brake Mounting and
Hardware Inspection
Rear Disc Brake Mounting and Hardware
Inspection
3. Identify any components with the following
conditions.
Binding or seized hardware
Worn, damaged or missing hardware
components
Loose, bent, cracked, or damaged
caliper mounting bracket
4. Replace components as required. Refer to the
following procedures, as required:
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4/26/23, 11:16 AM Disc Brake System Diagnosis

Step Action Yes No

Front Brake Caliper Bracket

Replacement
Rear Brake Caliper Bracket Replacement
5. Replace the unevenly-worn, loose or damaged
disc brake pads as a complete axle set.
Front Disc Brake Pads Replacement
Rear Disc Brake Pads Replacement

Did you complete the inspection and replacement?

1. Inspect the disc brake calipers, brake hoses

and brake pipes for evidence of an external
brake fluid leak.
2. Replace any components found to be leaking
brake fluid. Refer to the following procedures
as required:

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Front Brake Caliper Replacement
Rear Brake Caliper Replacement
Front Brake Hose Replacement
8 Go to Step 11 Go to Step 9
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Rear Brake Hose Replacement
Brake Pressure Modulator Valve Front
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Brake Pipe Replacement
Rear Brake Intermediate Number 1 Pipe
Replacement
ia

Rear Brake Intermediate Number 2 Pipe

Replacement
rd

Did you find and correct the source of the leak

causing contamination of the pads?
ca

1. Inspect the wheel drive shaft outer seals for

damage and evidence of a grease leak.
2. Replace any wheel drive shaft seal that is
9 found to be leaking grease which may be the Go to Step 11 Go to Step 10
source of the contamination to the pads.

Did you find and correct the source of the leak

causing contamination of the pads?

10 Go to Step 11 —
1. Inspect the automatic transmission cooling
system lines, if equipped, for damage and
evidence of an external fluid leak which may
be the source of the contamination to the
pads.
2. Inspect the power steering system hoses for
damage and evidence of an external fluid leak
which may be the source of the contamination
to the pads.
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4/26/23, 11:16 AM Disc Brake System Diagnosis

Step Action Yes No

3. Replace any components found to be leaking

fluid which may be the source of the
contamination to the pads.

Did you find and correct the source of the leak

causing contamination of the pads?

11 Go to Step 12 —
1. Clean the remaining disc brake system
components to remove any traces of the
contaminant.
Caution: Support the brake caliper with
heavy mechanic wire, or equivalent,
whenever it is separated from its
mount and the hydraulic flexible
brake hose is still connected. Failure
to support the caliper in this manner
will cause the flexible brake hose to

om
bear the weight of the caliper, which
may cause damage to the brake
hose and in turn may cause a brake
fluid leak.
Note: Do NOT disconnect the hydraulic brake
.c
flex hoses from the calipers.
2. Remove the front and/or rear disc brake
calipers, as appropriate, from the mounting
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brackets and support the calipers.
Front Brake Caliper Replacement
Rear Brake Caliper Replacement
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3. Inspect the disc brake caliper mounting

bracket and the mounting/sliding hardware.
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Front Disc Brake Mounting and

Hardware Inspection
Rear Disc Brake Mounting and Hardware
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Inspection
4. Identify any components with the following
conditions.
Binding or seized hardware
Worn, damaged or missing hardware
components
Loose, bent, cracked, or damaged
caliper mounting bracket
5. Replace the caliper mounting/sliding hardware
components as required.
Front Brake Caliper Bracket
Replacement
Rear Brake Caliper Bracket Replacement
6. Replace the contaminated disc brake pads as a
complete axle set.
Front Disc Brake Pads Replacement
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4/26/23, 11:16 AM Disc Brake System Diagnosis

Step Action Yes No

Rear Disc Brake Pads Replacement

Did you complete the cleaning, inspection and

replacement?

Visually inspect each of the rear disc brake rotor

shields/backing plates, if equipped, for evidence
12 of contact with the brake rotors. Go to Step 13 Go to Step 14
Are any of the brake rotor shields/backing plates
contacting the brake rotors?

Repair or replace the disc brake rotor

shields/backing plates as required.

13 Front Brake Shield Replacement Go to Step 14 —

Rear Brake Shield Replacement

Did you complete the repair or replacement?

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1. Check the thickness of each of the disc brake
rotors.
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Note: Make the following determination AND
ANSWER the question INDIVIDUALLY
for EACH rotor.
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14 2. Make a determination for each brake rotor if Go to Step 15 Go to Step 18
the rotor can be REFINISHED and REMAIN
ABOVE the minimum requirements.
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Brake Rotor Thickness Measurement

Does the disc brake rotor meet the minimum
requirements for REFINISHING?
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Note: Perform the following inspection AND

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ANSWER the question INDIVIDUALLY for

EACH rotor.
Inspect each of the disc brake rotors for thickness
15 variation that exceeds the maximum acceptable Go to Step 17 Go to Step 16
level. Brake Rotor Thickness Variation
Measurement
Does the brake rotor exhibit thickness variation
that exceeds the maximum acceptable level?

16 Go to Step 17 Go to Step 22
1. Inspect each of the disc brake rotors for the
following surface and wear conditions:
Brake Rotor Surface and Wear Inspection
Heavy rust and/or pitting
Cracks and/or heat spots
Excessive blueing discoloration
Deep or excessive scoring beyond
maximum acceptable level
© 2023 General Motors. All rights reserved.

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4/26/23, 11:16 AM Disc Brake System Diagnosis

Step Action Yes No

Note: Make the following determination AND

ANSWER the question INDIVIDUALLY
for EACH rotor.
2. Make a determination for each brake rotor if
the rotor requires refinishing based upon the
results of the inspection.
If the brake rotor exhibits any of the
conditions listed previously, it requires
refinishing.

Does the brake rotor require REFINISHING?

1. Refinish the brake rotor. Brake Rotor

Refinishing

17 2. Inspect the brake rotor thickness. Brake Rotor Go to Step 22 Go to Step 21

Thickness Measurement

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Were you able to REFINISH the brake rotor within
the minimum requirements?

Is the brake rotor at or below the DISCARD

18 Go to Step 21 Go to Step 19
requirements? .c
Note: Perform the following inspection AND
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ANSWER the question INDIVIDUALLY for
EACH rotor.
Inspect each of the disc brake rotors for thickness
19 variation that exceeds the maximum acceptable Go to Step 21 Go to Step 20
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level. Brake Rotor Thickness Variation

Measurement
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Does the brake rotor exhibit thickness variation

that exceeds the maximum acceptable level?
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20 Go to Step 21 Go to Step 22
1. Inspect each of the disc brake rotors for the
following surface and wear conditions:
Brake Rotor Surface and Wear Inspection
Heavy rust and/or pitting
Cracks and/or heat spots
Excessive blueing discoloration
Deep or excessive scoring beyond
maximum acceptable level
Note: Make the following determination AND
ANSWER the question INDIVIDUALLY
for EACH rotor.
2. Make a determination for each brake rotor if
the rotor requires replacement based upon
the results of the inspection.
If the brake rotor exhibits any of the
conditions listed previously, it requires
replacement.
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4/26/23, 11:16 AM Disc Brake System Diagnosis

Step Action Yes No

Does the brake rotor require REPLACEMENT?

Note: Whenever a brake rotor is replaced, the

assembled lateral runout (LRO) of the rotor
must be measured to ensure optimum
performance of the disc brakes.
Replace the brake rotor.
21 Go to Step 24 —
Front Brake Rotor Replacement
Rear Brake Rotor Replacement

Did you complete the replacement?

Note: Perform the following inspection AND

ANSWER the question INDIVIDUALLY for
EACH rotor.
Inspect each of the disc brake rotors for

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22 assembled LRO that exceeds the maximum Go to Step 23 Go to Step 24
acceptable level. Brake Rotor Assembled Lateral
Runout Measurement
Does the brake rotor exhibit assembled LRO that
exceeds the maximum acceptable level?
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Correct the LRO for each brake rotor that was
determined to have LRO exceeding the maximum
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23 acceptable level. Brake Rotor Assembled Lateral Go to Step 24 —
Runout Measurement
Did you complete the operation?
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Install or connect components that were removed Disc Brake

or disconnected during diagnosis. System OK
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24 —
Did you complete the operation? Return to
Symptom Table
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4/26/23, 10:48 AM DTC B273A

2022 Buick Encore GX | | Brakes | Antilock Brake System |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5569277

DTC B273A
Diagnostic Instructions

Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
Review Strategy Based Diagnosis for an overview of the diagnostic approach.
Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC B273A 02 Hill Descent Control Switch Short to Ground

Diagnostic Fault Information

Short to Open/High Short to Signal

Circuit Ground Resistance Voltage Performance

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Signal B273A 02 1 1 —

Ground — 1 — —
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1. Hill descent control switch inoperative
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Circuit/System Description

The body control module monitors the signal circuit from the hill descent control switch. The hill
descent switch is a momentary switch that is normally open. When the hill descent control switch
ia

is pressed once, the body control module will request the electronic brake control module via
serial data to disable or enable the hill descent control. When activated, the switch grounds the
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hill descent control system signal circuit. The electronic brake control module then enables or
disables the hill descent control system. The electronic brake control module will request the
instrument cluster via serial data to turn the hill descent indicator ON or OFF to notify the driver.
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Conditions for Running the DTC

Ignition ON.

Conditions for Setting the DTC

The body control module detects a short to ground on the signal circuit.

Action Taken When the DTC Sets

The body control module ignores the hill descent switch signal input.

Conditions for Clearing the DTC

The DTC clears when the diagnostic runs and passes.

The history DTC will clear after 40 consecutive fault-free ignition cycles have occurred.

Reference Information
Schematic Reference

Antilock Brake System Schematics

© 2023 General Motors. All rights reserved.

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4/26/23, 10:48 AM DTC B273A

Connector End View Reference

Master Electrical Component List

Description and Operation

ABS Description and Operation

Electrical Information Reference

Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

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1. Ignition ON.
2. Verify the scan tool Body Control Module Hill Descent Control Switch parameter changes
between Active and Inactive when pressing and releasing the hill descent control switch.
⇒ If the parameter does not change
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Refer to Circuit/System Testing.
⇓ If the parameter changes
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3. All OK.

Circuit/System Testing
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1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the S48E
Multifunction Switch — Center Console. It may take up to 2 min for all vehicle systems to
power down.
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2. Test for less than 5 Ω between the ground circuit terminal 1 and ground.
⇒ If 5 Ω or greater
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2.1. Ignition OFF.

2.2. Test for less than 2 Ω in the ground circuit end to end.
⇒ If 2 Ω or greater, repair the open/high resistance in the circuit.
⇒ If less than 2 Ω, repair the open/high resistance in the ground connection.
⇓ If less than 5 Ω
3. Ignition ON.
4. Verify the scan tool Body Control Module Hill Descent Control Switch parameter is Inactive.
⇒ If not Inactive
4.1. Ignition OFF, disconnect the X2 harness connector at the K9 Body Control Module.
4.2. Test for infinite resistance between the signal circuit terminal 14 and ground.
⇒ If less than infinite resistance, repair the short to ground on the circuit.
⇒ If infinite resistance, replace the K9 Body Control Module.
⇓ If Inactive
5. Install a 3 A fused jumper wire between the signal circuit terminal 8 and the ground circuit
terminal 1. © 2023 General Motors. All rights reserved.

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4/26/23, 10:48 AM DTC B273A

6. Verify the scan tool Hill Descent Control Switch parameter is Active.
⇒ If not Active
6.1. Ignition OFF, disconnect the X2 harness connector at the K9 Body Control Module, ignition
ON.
6.2. Test for less than 1 V between the signal circuit and ground.
⇒ If 1 V or greater, repair the short to voltage on the circuit.
⇓ If less than 1 V
6.3. Test for less than 2 Ω in the signal circuit end to end.
⇒ If 2 Ω or greater, repair the open/high resistance in the circuit.
⇒ If less than 2 Ω, replace the K9 Body Control Module.
⇓ If Active
7. Test or replace the S48E Multifunction Switch — Center Console.

Component Testing

1. Ignition OFF, disconnect the harness connector at the S48E Multifunction Switch — Center
Console.

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2. Test for infinite resistance between the signal terminal 8 and the ground terminal 1 with the
switch in the open position.
⇒ If less than infinite resistance
Replace the S48E Multifunction Switch — Center Console.
⇓ If infinite resistance
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3. Test for less than 2 Ω between the signal terminal 8 and the ground terminal 1 with the switch
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in the closed position.
⇒ If 2 Ω or greater
Replace the S48E Multifunction Switch — Center Console.
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⇓ If less than 2 Ω
4. All OK.
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Repair Instructions
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Perform the Diagnostic Repair Verification after completing the repair.

Instrument Panel Center Air Outlet Replacement

Control Module References for Body Control Module replacement, programming and setup

© 2023 General Motors. All rights reserved.

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4/26/23, 10:48 AM DTC B2745

2022 Buick Encore GX | | Brakes | Antilock Brake System |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5402754

DTC B2745
Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC B2745 Traction Control Switch Circuit

Symptom Byte Information: Symptom Byte List

Diagnostic Fault Information

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Short to Open/High Short to Signal
Circuit Ground Resistance Voltage Performance

Signal

Ground
.c B2745 02

—
1

1
1

—
—

—
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1. Traction Control Switch = Inoperative
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Circuit/System Description
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For an overview of the component/system, refer to: ABS Description and Operation

Circuit Description
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The control module input circuit has an internal

Signal
resistance connected to 12 V.

Ground Chassis Ground

Component Description

The control module contains a microprocessor used

K9 Body Control Module
to process input data to control outputs.

S48E Multifunction Switch - Center When the traction control switch is pressed once, the
Console BCM will request the EBCM via serial data to disable
the traction control. When the switch is pressed for 5
s, the BCM will request the EBCM to disable the
stability control. The EBCM will request the
instrument cluster via serial data to turn the
"TractionAllControl
© 2023 General Motors. rights Off" and "Stability Control Off"
reserved.

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4/26/23, 10:48 AM DTC B2745

Component Description

indicators On to notify the driver of the deactivation.

When the switch is pressed once more, the traction
control and stability control will be activated again.

Conditions for Running the DTC

Ignition On

Conditions for Setting the DTC

The control module detects a short to ground.

Actions Taken When the DTC Sets

The body control module ignores the traction control switch input signal.

Conditions for Clearing the DTC

The conditions for setting the DTC no longer exist.

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A history DTC will clear after 40 consecutive malfunction-free ignition cycles.

Reference Information
Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

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Master Electrical Component List

Electrical Information Reference

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Circuit Testing
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Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs
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Scan Tool Reference

Control Module References

Circuit/System Verification

1. Ignition » On / Vehicle » In Service Mode

2. Perform the scan tool control function: All Indicators Command » On and Off
⇒ Traction/Stability Control Indicator = OFF
Replace the component: P16 Instrument Cluster
⇓ Traction/Stability Control Indicator = ON
3. Operate the component: S48E Multifunction Switch - Center Console » Active
Verify the scan tool parameter: Traction Control Switch @ K9 Body Control Module = Active
⇒ If not the specified state
Refer to: Circuit/System Testing
⇓ If the specified state
© 2023 General Motors. All rights reserved.

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4/26/23, 10:48 AM DTC B2745

4. All OK.

Circuit/System Testing

Note: It may take up to 2 min for all vehicle systems to power down before an accurate
ground or low reference circuit continuity test can be performed.
1. Ignition/Vehicle & All vehicle systems » Off
2. Disconnect the electrical connector: S48E Multifunction Switch - Center Console
3. Test for less than 10 Ω between the test points: Ground circuit terminal 1 & Ground
⇒ If 10 Ω or greater
3.1. Disconnect the ground connection: G200
3.2. Test for less than 2 Ω between the test points: Ground circuit terminal 1 @ S48E
Multifunction Switch - Center Console & Terminal G200
⇒ If 2 Ω or greater » Repair the open/high resistance in the circuit.
⇒ If less than 2 Ω » Repair the open/high resistance in the ground connection.
⇓ If less than 10 Ω
4. Ignition » On / Vehicle » In Service Mode

om
5. Verify the scan tool parameter: Traction Control Switch @ K9 Body Control Module = Inactive
⇒ If not the specified state
5.1. Ignition/Vehicle » Off
5.2. Disconnect the electrical connector: X2 Harness Connector @ K9 Body Control Module
.c
5.3. Test for infinite resistance between the test points: Signal circuit terminal 14 @ X2
Harness Connector & Ground
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⇒ If less than infinite resistance » Repair the short to ground on the circuit.
⇒ If infinite resistance » Replace the component: K9 Body Control Module
⇓ If the specified state
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6. Connect a 3 A fused jumper wire between the test points: Signal circuit terminal 8 & Ground
circuit terminal 1
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7. Verify the scan tool parameter: Traction Control Switch @ K9 Body Control Module = Active
⇒ If not the specified state
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7.1. Ignition/Vehicle » Off & Remove » Jumper wire(s)

7.2. Disconnect the electrical connector: X2 Harness Connector @ K9 Body Control Module
7.3. Ignition » On / Vehicle » In Service Mode
7.4. Test for less than 1 V between the test points: Signal circuit terminal 14 @ X2 Harness
Connector & Ground
⇒ If 1 V or greater » Repair the short to voltage on the circuit.
⇓ If less than 1 V
7.5. Ignition/Vehicle » Off
7.6. Test for less than 2 Ω between the test points: @ S48E Multifunction Switch - Center
Console & Terminal 14 @ X2 Harness Connector
⇒ If 2 Ω or greater » Repair the open/high resistance in the circuit.
⇒ If less than 2 Ω » Replace the component: K9 Body Control Module
⇓ If the specified state
8. Test or replace the component: S48E Multifunction Switch - Center Console

Component Testing © 2023 General Motors. All rights reserved.

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4/26/23, 10:48 AM DTC B2745

1. Ignition/Vehicle » Off
2. Disconnect the electrical connector: S48E Multifunction Switch - Center Console
3. Test for infinite resistance between the test points: Signal terminal 8 & Ground terminal 1 —
The switch is in the open position.
⇒ If less than infinite resistance
Replace the component: S48E Multifunction Switch - Center Console
⇓ If infinite resistance
4. Test for less than 2 Ω between the test points: Signal terminal 8 & Ground terminal 1 — The
switch is in the closed position.
⇒ If 2 Ω or greater
Replace the component: S48E Multifunction Switch - Center Console
⇓ If less than 2 Ω
5. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair

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Verification

For control module replacement, programming, and setup refer to: Control Module References

.c
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4/26/23, 10:48 AM DTC C0001-C0004, C0010, C0011, C0014, C0015, C0018, C0019, C001C, or C001D

2022 Buick Encore GX | | Brakes | Antilock Brake System |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5081518

DTC C0001-C0004, C0010, C0011, C0014, C0015, C0018,

C0019, C001C, or C001D
Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C0001 Brake Master Cylinder Separating Solenoid Valve 1

DTC C0002 Brake System Plunger Separating Solenoid Valve 1

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DTC C0003 Brake Master Cylinder Separating Solenoid Valve 2

DTC C0004 Brake System Plunger Separating Solenoid Valve 2

.c
DTC C0010 Left Front Inlet Solenoid Valve

DTC C0011 Left Front Outlet Solenoid Valve

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DTC C0014 Right Front Inlet Solenoid Valve

DTC C0015 Right Front Outlet Solenoid Valve

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DTC C0018 Left Rear Inlet Solenoid Valve

DTC C0019 Left Rear Outlet Solenoid Valve

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DTC C001C Right Rear Inlet Solenoid Valve

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DTC C001D Right Rear Outlet Solenoid Valve

Symptom Byte Information: Symptom Byte List

Circuit/System Description

For an overview of the component/system, refer to: ABS Description and Operation

Conditions for Running the DTC

Ignition/Vehicle = ON

Conditions for Setting the DTC

K160 Brake System Control Module = Internal Malfunction

K160 Brake System Control Module = Greater than 265°C (509°F)

Actions Taken When the DTC Sets

Brake warning indicator malfunction. = ON

ABS Warning Indicator = ON
© 2023 General Motors. All rights reserved.

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4/26/23, 10:48 AM DTC C0001-C0004, C0010, C0011, C0014, C0015, C0018, C0019, C001C, or C001D

Traction/Stability Control Indicator = ON

Hill Descent Control = ON
Vehicle Speed Limit = Less than 100 km/h (62 MPH)
Brake Assist = None
Malfunction Indicator Lamp (MIL) = ON
DTCs listed in the DTC Descriptor category = Type A DTC

Conditions for Clearing the DTC

DTCs listed in the DTC Descriptor category = Type A DTC

Reference Information
DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Schematic Reference

Antilock Brake System Schematics

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Connector End View Reference

Master Electrical Component List

Electrical Information Reference

Circuit Testing
Connector Repairs
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Testing for Intermittent Conditions and Poor Connections
Wiring Repairs
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Scan Tool Reference

Control Module References

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Circuit/System Verification
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1. Ignition » On / Vehicle » In Service Mode

2. Verify DTC is not set:
⇒ If the DTC sets
Replace the component: K160 Brake System Control Module
⇓ If the DTC is not set
3. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
Verification

For control module replacement, programming, and setup refer to: Control Module
References

© 2023 General Motors. All rights reserved.

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4/26/23, 10:59 AM DTC C2A0C

2022 Buick Encore GX | | Brakes | Antilock Brake System |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5073886

DTC C2A0C
Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C2A0C Traction Control Disabling Inhibited by 4 Wheel Drive System

Symptom Byte Information: Symptom Byte List

Circuit/System Description

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For an overview of the component/system, refer to: ABS Description and Operation

Conditions for Running the DTC

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Ignition » On / Vehicle » In Service Mode

Conditions for Setting the DTC

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Brake System Control Module = Malfunction Brakes

Actions Taken When the DTC Sets

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Traction/Stability Control Indicator = ON

Conditions for Clearing the DTC

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The conditions for setting the DTC no longer exist.

ca

A history DTC will clear after 40 consecutive malfunction-free ignition cycles.

Reference Information
Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

Master Electrical Component List

Electrical Information Reference

Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs

Scan Tool Reference

Control Module References

© 2023 General Motors. All rights reserved.

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4/26/23, 10:59 AM DTC C2A0C

Circuit/System Verification

1. Verify no other DTCs are set.

⇒ If any other DTCs are set
Refer to: Diagnostic Trouble Code (DTC) List - Vehicle
⇓ If no other DTCs are set
2. Verify the DTC does not set.
⇒ If the DTC sets
Replace the component: K160 Brake System Control Module
⇓ If the DTC is not set
3. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
Verification

For control module replacement, programming, and setup refer to: Control Module References

om
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4/26/23, 10:58 AM DTC C2A01-C2A04

2022 Buick Encore GX | | Brakes | Antilock Brake System |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5063828

DTC C2A01-C2A04
Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C2A01 Left Front Wheel Speed Sensor Direction

DTC C2A02 Right Front Wheel Speed Sensor Direction

DTC C2A03 Left Rear Wheel Speed Sensor Direction

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DTC C2A04 Right Rear Wheel Speed Sensor Direction

Symptom Byte Information: Symptom Byte List

Circuit/System Description .c
For an overview of the component/system, refer to: ABS Description and Operation
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Component Description
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The sensor contains a hall-effect sensor and

additional electronics that processes the signal. It
detects the change of strength of the magnetic field
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caused by the reluctor ring. When the strength

B5 Wheel Speed Sensor changes, the sensor changes the amount of current it
consumes. This results in a square wave signal of
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current and voltage. The control module detects the

frequency in which the signal changes, which is
proportional to the rotational speed.

The control module K160 uses the input signal from

K160 Brake System Control Module
the sensor B5 to determine the wheel speed.

Conditions for Running the DTC

Ignition On

The vehicle speed is greater than 15 km/h (10 MPH).

Conditions for Setting the DTC

Wheel Speed Sensor = Erratic

Incorrect installation of a component: B5 Wheel Speed Sensor
Electromagnetic Interference

Actions Taken When the DTC Sets General Motors. All rights reserved.
© 2023

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4/26/23, 10:58 AM DTC C2A01-C2A04

ABS Indicator Control = ON

Traction/Stability Control Indicator = ON
A message and/or warning indicator may be displayed to the driver.
The EBCM disables the ABS, traction control, stability control and hill start assist for the
duration of the ignition cycle.

Conditions for Clearing the DTC

The conditions for setting the DTC no longer exist.

A history DTC will clear after 40 consecutive malfunction-free ignition cycles.

Diagnostic Aids

Inspect the component for wear or damage: B5 Wheel Speed Sensor .

Do NOT use a magnet to clean the component: Encoder Ring .
Inspect the following components: B5 Wheel Speed Sensor = Correct part .
If the customer comments that the ABS indicator is ON only during moist environmental
conditions (rain, snow, vehicle washed), inspect the wheel speed sensor wiring for signs of
water intrusion.

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Reference Information
Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

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gn
Master Electrical Component List

Electrical Information Reference

ia

Circuit Testing
Connector Repairs
rd

Testing for Intermittent Conditions and Poor Connections

Wiring Repairs
ca

Scan Tool Reference

Control Module References

Circuit/System Testing

1. Inspect the following components:

B5 Wheel Speed Sensor ≠ Correct part
B5 Wheel Speed Sensor = Visible Damage
⇒ If a condition exists
Replace the component: B5 Wheel Speed Sensor
⇓ If no conditions exist
2. Under normal operating conditions: Verify the DTC does not set.
⇒ If the DTC sets
Replace the component: K160 Brake System Control Module
⇓ If the DTC does not set
3. All OK.
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4/26/23, 10:58 AM DTC C2A01-C2A04

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
Verification

Front Wheel Speed Sensor Replacement

Rear Wheel Speed Sensor Replacement
For control module replacement, programming, and setup refer to: Control Module
References

om
.c
gn
ia
rd
ca

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4/26/23, 11:15 AM DTC C2A1C

2022 Buick Encore GX | | Brakes | Hydraulic Brakes |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5125998

DTC C2A1C
Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C2A1C Brake System Plunger Motor Position Sensor Not Learned

Symptom Byte Information: Symptom Byte List

Circuit/System Description

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For an overview of the component/system, refer to: ABS Description and Operation

Conditions for Running the DTC

Ignition/Vehicle = ON

Conditions for Setting the DTC

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gn
Brake Pressure Modulator Valve = Malfunction

Actions Taken When the DTC Sets

ia

ABS Indicator Control = ON

Traction/Stability Control Indicator = ON
rd

Conditions for Clearing the DTC

ca

The conditions for setting the DTC no longer exist.

A history DTC will clear after 40 consecutive malfunction-free ignition cycles.

Reference Information
Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

Master Electrical Component List

Electrical Information Reference

Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs

Scan Tool Reference

© 2023 General Motors. All rights reserved.

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4/26/23, 11:15 AM DTC C2A1C

Control Module References

Circuit/System Verification

1. Ignition » On / Vehicle » In Service Mode

2. Perform the configuration/reset function: Brake System Plunger Motor Position Sensor Learn
3. Verify DTC C2A1C is not set.
⇒ If the DTC sets
Replace the component: K160 Brake System Control Module
⇓ If the DTC is not set
4. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
Verification

For control module replacement, programming, and setup refer to: Control Module References

om
.c
gn
ia
rd
ca

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4/26/23, 11:09 AM DTC C2A1D

2022 Buick Encore GX | | Brakes | Park Brake |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5119160

DTC C2A1D
Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C2A1D Park Brake in Service Release Mode

Symptom Byte Information: Symptom Byte List

Circuit/System Description

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For an overview of the component/system, refer to: Electronic Parking Brake Description

Component Description

Park Brake Actuator

.c The park brake function uses the same brake pads as
the operational brake. An electric motor is used to
gn
apply and release the brake pads.

The control module K160 can increase and decrease

ia

the brake pressure on all 4 wheels individually in order

to fulfill these functions:
rd

Antilock Braking
Traction Control
Vehicle Stability Control
ca

K160 Brake System Control Module

The control module K160 can also influence the
following control modules to limit the amount of
produced torque:

K20 Engine Control Module

K71 Transmission Control Module

Conditions for Running the DTC

Ignition = On or Vehicle = Service Mode

System Voltage = 9 to 16 V

Conditions for Setting the DTC

Parking Brake Actuator = Service Release

Actions Taken When the DTC Sets

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4/26/23, 11:09 AM DTC C2A1D

A message and/or warning indicator may be displayed to the driver.

Conditions for Clearing the DTC

The conditions for setting the DTC no longer exist.

Reference Information
Schematic Reference

Park Brake System Schematics

Connector End View Reference

Master Electrical Component List

Electrical Information Reference

Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs

om
Scan Tool Reference

Control Module References

Circuit/System Verification .c
1. Ignition » On / Vehicle » In Service Mode
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2. Verify DTC C2A1D is not set.
⇒ If the DTC is set
2.1. Verify the condition does not exist: Left and Right Park Brake Actuator Status= Service
ia

Release
⇒ If a condition exists
rd

Perform the control function: Deactivate Rear Park Brake Service Position.
⇓ If no condition exists
ca

Perform the following learn procedure: Park Brake Calibration

⇓ If the DTC is not set
3. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
Verification

For control module replacement, programming, and setup refer to: Control Module
References

© 2023 General Motors. All rights reserved.

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4/26/23, 10:39 AM DTC C2A1E

2022 Buick Encore GX | | Brakes | Disc Brakes |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5088824

DTC C2A1E
Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C2A1E Brakes Overheated - System Disabled

Symptom Byte Information: Symptom Byte List

Circuit/System Description

om
For an overview of the component/system, refer to: ABS Description and Operation

Conditions for Running the DTC

Ignition/Vehicle = ON

Conditions for Setting the DTC

.c
gn
Brake System Calculated Component Overtemperature

Actions Taken When the DTC Sets

ia

Brake System Warning Indicator = Off

Conditions for Clearing the DTC

rd

The conditions for setting the DTC no longer exist.

ca

A history DTC will clear after 40 consecutive malfunction-free ignition cycles.

Diagnostic Aids

This DTC does not indicate any system malfunction.

DTC C2A1E indicates there was excessive system activation in the following system(s) that
caused the high temperature:
– Antilock Braking System
– Traction Control System
– Vehicle Stability Control

Reference Information
Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

Master Electrical Component List

© 2023 General Motors. All rights reserved.

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4/26/23, 10:39 AM DTC C2A1E

Electrical Information Reference

Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs

Scan Tool Reference

Control Module References

Circuit/System Verification

1. Discuss with the customer about the driving conditions when the concern occurred.
2. Verify no other DTCs are set.
⇒ If any other DTCs are set
Refer to: Diagnostic Trouble Code (DTC) List - Vehicle
⇓ If no other DTCs are set
3. Under normal operating conditions: Verify DTC C2A1E is not set.

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⇒ If the DTC sets
Replace the component: K160 Brake System Control Module
⇓ If the DTC is not set
4. All OK.

Repair Instructions
.c
gn
Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
Verification
ia

For control module replacement, programming, and setup refer to: Control Module References
rd
ca

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4/26/23, 11:00 AM DTC C2A1F

2022 Buick Encore GX | | Brakes | Antilock Brake System |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5088826

DTC C2A1F
Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C2A1F Brake System Reference Speed Not Plausible

Symptom Byte Information: Symptom Byte List

Circuit/System Description

om
For an overview of the component/system, refer to: ABS Description and Operation

Conditions for Running the DTC

Ignition/Vehicle = ON

Conditions for Setting the DTC

.c
gn
K160 Brake System Control Module = Internal Malfunction

Actions Taken When the DTC Sets

ia

ABS Indicator Control = ON

Traction/Stability Control Indicator = ON
rd

Conditions for Clearing the DTC

ca

The conditions for setting the DTC no longer exist.

A history DTC will clear after 40 consecutive malfunction-free ignition cycles.

Diagnostic Aids

Diagnose other DTCs first.

Reference Information
Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

Master Electrical Component List

Electrical Information Reference

Circuit Testing
Connector Repairs
Testing for Intermittent
© 2023 Conditions and PoorAll
General Motors. Connections
rights reserved.

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4/26/23, 11:00 AM DTC C2A1F

Wiring Repairs

Scan Tool Reference

Control Module References

Circuit/System Verification

1. Ignition » On / Vehicle » In Service Mode

2. Verify DTC C2A1F is not set.
⇒ If DTC C2A1F is set
Replace the component: K160 Brake System Control Module
⇓ If the DTC is not set
3. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
Verification

om
For control module replacement, programming, and setup refer to: Control Module References

.c
gn
ia
rd
ca

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4/26/23, 10:59 AM DTC C2A07

2022 Buick Encore GX | | Brakes | Antilock Brake System |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5073871

DTC C2A07
Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C2A07 Engine Control Module Indicated Torque Signal Malfunction

Symptom Byte Information: Symptom Byte List

Circuit/System Description

om
For an overview of the component/system, refer to: ABS Description and Operation

Conditions for Running the DTC

.c
Ignition » On / Vehicle » In Service Mode

Conditions for Setting the DTC

gn
Brake System Control Module = Malfunction Brakes

Actions Taken When the DTC Sets

ia

Traction/Stability Control Indicator = ON

Conditions for Clearing the DTC

rd

The conditions for setting the DTC no longer exist.

ca

A history DTC will clear after 40 consecutive malfunction-free ignition cycles.

Reference Information
Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

Master Electrical Component List

Electrical Information Reference

Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs

Scan Tool Reference

Control Module References

© 2023 General Motors. All rights reserved.

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4/26/23, 10:59 AM DTC C2A07

Circuit/System Verification

1. Verify no other DTCs are set.

⇒ If any other DTCs are set
Refer to: Diagnostic Trouble Code (DTC) List - Vehicle
⇓ If no other DTCs are set
2. Replace the component: K20 Engine Control Module
3. Verify the DTC does not set.
⇒ If the DTC sets
Replace the component: K160 Brake System Control Module
⇓ If the DTC is not set
4. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
Verification

om
For control module replacement, programming, and setup refer to: Control Module References

.c
gn
ia
rd
ca

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4/26/23, 10:59 AM DTC C2A08-C2A0A

2022 Buick Encore GX | | Brakes | Antilock Brake System |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5073876

DTC C2A08-C2A0A
Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C2A08 Vehicle Stability Control Disabling Inhibited by Tire Pressure Monitoring

DTC C2A09 Vehicle Stability Control Disabling Inhibited by Limited Slip Differential

DTC C2A0A Vehicle Stability Control Disabling Inhibited by Suspension Control Module

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Symptom Byte Information: Symptom Byte List

Circuit/System Description

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For an overview of the component/system, refer to: ABS Description and Operation

Conditions for Running the DTC

gn
Ignition » On / Vehicle » In Service Mode

Conditions for Setting the DTC

ia

Brake System Control Module = Malfunction Brakes

Actions Taken When the DTC Sets

rd

Vehicle Stability Control cannot be turned OFF

ca

Conditions for Clearing the DTC

The conditions for setting the DTC no longer exist.

A history DTC will clear after 40 consecutive malfunction-free ignition cycles.

Diagnostic Aids

Using the Regenerative Braking, Stability or Traction Control Disabling History Data may aid in
locating the source of the concern.

Reference Information
Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

Master Electrical Component List

Electrical Information Reference

Circuit Testing © 2023 General Motors. All rights reserved.

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4/26/23, 10:59 AM DTC C2A08-C2A0A

Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs

Scan Tool Reference

Control Module References

Circuit/System Verification

1. Verify no other DTCs are set.

⇒ If any other DTCs are set
Refer to: Diagnostic Trouble Code (DTC) List - Vehicle
⇓ If no other DTCs are set
Note: Using the Regenerative Braking, Stability or Traction Control Disabling History Data
may aid in locating the source of the concern.
2. Clear DTCs
3. Verify DTC does not reset.

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⇒ If the DTC sets
Replace the component: K160 Brake System Control Module
⇓ If the DTC is not set
4. All OK.

Repair Instructions
.c
gn
Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
Verification

For control module replacement, programming, and setup refer to: Control Module References
ia
rd
ca

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4/26/23, 10:59 AM DTC C2A13 or C2A14

2022 Buick Encore GX | | Brakes | Antilock Brake System |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5083908

DTC C2A13 or C2A14

Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C2A13 Brake Master Cylinder Piston Position Sensor 1 Communication Malfunction

DTC C2A14 Brake Master Cylinder Piston Position Sensor 2 Communication Malfunction

Symptom Byte Information: Symptom Byte List

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Circuit/System Description

For an overview of the component/system, refer to: ABS Description and Operation

Conditions for Running the DTC

Ignition/Vehicle = ON
.c
gn
Conditions for Setting the DTC

A104 Brake Master Cylinder = Malfunctioned

ia

Actions Taken When the DTC Sets

Malfunction Indicator Lamp (MIL) = ON

rd

A message and/or warning indicator may be displayed to the driver.

DTCs listed in the DTC Descriptor category = Type A DTC
ca

Conditions for Clearing the DTC

DTCs listed in the DTC Descriptor category = Type A DTC

Reference Information
Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

Master Electrical Component List

Electrical Information Reference

Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs
© 2023 General Motors. All rights reserved.

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4/26/23, 10:59 AM DTC C2A13 or C2A14

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References

Circuit/System Verification

1. Ignition » On / Vehicle » In Service Mode

2. Verify the DTC does not set.
⇒ If the DTC sets
Replace the component: A104 Brake Master Cylinder
⇓ If the DTC is not set
3. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair

om
Verification

For control module replacement, programming, and setup refer to: Control Module References

.c
gn
ia
rd
ca

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4/26/23, 10:59 AM DTC C2A15 or C2A16

2022 Buick Encore GX | | Brakes | Antilock Brake System |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5083930

DTC C2A15 or C2A16

Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C2A15 Brake Pressure Sensor Communication Malfunction

DTC C2A16 Brake Master Cylinder Pressure Sensor 1 Communcation Malfunction

Symptom Byte Information: Symptom Byte List

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Circuit/System Description

For an overview of the component/system, refer to: ABS Description and Operation

Conditions for Running the DTC

Ignition/Vehicle = ON
.c
gn
Conditions for Setting the DTC

A104 Brake Master Cylinder = Malfunctioned

ia

Actions Taken When the DTC Sets

ABS Indicator Control = ON

rd

Traction/Stability Control Indicator = ON

A message and/or warning indicator may be displayed to the driver.
ca

DTC is a Type A DTC

Conditions for Clearing the DTC

DTC is a Type A DTC

Reference Information
Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

Master Electrical Component List

Electrical Information Reference

Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
© 2023 General Motors. All rights reserved.

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4/26/23, 10:59 AM DTC C2A15 or C2A16

Wiring Repairs

Scan Tool Reference

Control Module References

Circuit/System Verification

1. Ignition » On / Vehicle » In Service Mode

2. Verify the DTC does not set.
⇒ If the DTC sets
Replace the component: A104 Brake Master Cylinder
⇓ If the DTC is not set
3. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
Verification

om
For control module replacement, programming, and setup refer to: Control Module References

.c
gn
ia
rd
ca

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4/26/23, 11:14 AM DTC C2A17

2022 Buick Encore GX | | Brakes | Hydraulic Brakes |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5063971

DTC C2A17
Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C2A17 Hydraulic Brake Circuit Excessive Sponginess - Level 1

Symptom Byte Information: Symptom Byte List

Circuit/System Description

om
For an overview of the component/system, refer to: ABS Description and Operation

Conditions for Running the DTC

Ignition/Vehicle = Shutdown Mode

Conditions for Setting the DTC

.c
gn
Brake Pressure Modulator Valve = Leaking — Internal

Actions Taken When the DTC Sets

ia

Malfunction Indicator Lamp (MIL) = ON

Conditions for Clearing the DTC

rd

The conditions for setting the DTC no longer exist.

ca

Reference Information
Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

Master Electrical Component List

Electrical Information Reference

Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs

Scan Tool Reference

Control Module References

Circuit/System Verification© 2023 General Motors. All rights reserved.

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4/26/23, 11:14 AM DTC C2A17

1. Ignition » On / Vehicle » In Service Mode

2. Perform the scan tool control function: Deactivate Brake Boost System
3. Verify there are no leaks in the component/system: Brake System » Refer to: Brake Fluid Loss
4. Apply the brake pedal. — More than 2 times.
5. Ignition/Vehicle » Off — For greater than 10 min
6. Ignition » On / Vehicle » In Service Mode — Brake Pedal Not Applied
7. Perform the scan tool control function: Brake Hydraulics Test
⇒ If the procedure/test does not pass
Refer to: Hydraulic Brake System Bleeding
⇓ If the procedure/test passes
8. Perform the following steps: — 10 times
8.1. Apply the brake pedal slowly from 0- 4000kPa
8.2. Hold the pressure constant for at least 10s
8.3. Release the brake pedal slowly
9. Wait 30s

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10. Verify DTC C2A17 is not set.
⇒ If DTC C2A17 is set
Replace the component: A104 Brake Master Cylinder
⇓ If the DTC is not set
11. All OK.
.c
gn
Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
Verification
ia

For control module replacement, programming, and setup refer to: Control Module References
rd
ca

© 2023 General Motors. All rights reserved.

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4/26/23, 11:15 AM DTC C2A20

2022 Buick Encore GX | | Brakes | Hydraulic Brakes |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5082673

DTC C2A20
Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C2A20 Hydraulic Brake Circuit Excessive Sponginess - Level 2

Symptom Byte Information: Symptom Byte List

Circuit/System Description

om
For an overview of the component/system, refer to: ABS Description and Operation

Conditions for Running the DTC

Ignition/Vehicle = ON

Conditions for Setting the DTC

.c
gn
Brake Pressure Sensor = Out of Range Low

Actions Taken When the DTC Sets

ia

ABS Indicator Control = ON

Traction/Stability Control Indicator = ON
rd

A message and/or warning indicator may be displayed to the driver.

DTCs listed in the DTC Descriptor Category = Type A DTC
ca

Conditions for Clearing the DTC

1. Ignition/Vehicle » Off — For greater than 10 min

2. Ignition/Vehicle » On — For greater than 15 s — Brake Pedal Not Applied
3. Apply and hold the brake pedal. — Greater than 7800 kPa (1131 PSI) until the brake warning
light turns off.
4. DTCs listed in the DTC Descriptor Category = Type A DTC

Reference Information
Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

Master Electrical Component List

Electrical Information Reference

Circuit Testing © 2023 General Motors. All rights reserved.

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4/26/23, 11:15 AM DTC C2A20

Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs

Scan Tool Reference

Control Module References

Circuit/System Verification

1. Ignition » On / Vehicle » In Service Mode

2. Perform the scan tool control function: Deactivate Brake Boost System
3. Verify there are no leaks in the component/system: Brake System » Refer to: Brake Fluid Loss
4. Apply the brake pedal. — More than 2 times.
5. Perform the scan tool control function: Brake Hydraulics Test
⇒ If the procedure/test does not pass
Refer to: Hydraulic Brake System Bleeding
⇓ If the procedure/test passes

om
6. Ignition/Vehicle » Off — For greater than 10 min
7. Ignition/Vehicle » On — For greater than 15 s — Brake Pedal Not Applied
8. Apply and hold the brake pedal. — Hard — For greater than 120 s
9. Release the brake pedal.
10. Verify DTC C2A20 is not set.
.c
gn
⇒ If DTC C2A20 is set
Test or replace the component: A104 Brake Master Cylinder
⇓ If the DTC is not set
ia

11. All OK.

Repair Instructions
rd

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
Verification
ca

For control module replacement, programming, and setup refer to: Control Module References

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4/26/23, 11:09 AM DTC C2A21

2022 Buick Encore GX | | Brakes | Park Brake |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5119265

DTC C2A21
Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C2A21 Park Brake Actuator Position Unknown

Symptom Byte Information: Symptom Byte List

Circuit/System Description

om
For an overview of the component/system, refer to: Electronic Parking Brake Description

Component Description

Park Brake Actuator

.c The park brake function uses the same brake pads as
the operational brake. An electric motor is used to
gn
apply and release the brake pads.

The control module K160 can increase and decrease

ia

the brake pressure on all 4 wheels individually in order

to fulfill these functions:
rd

Antilock Braking
Traction Control
Vehicle Stability Control
ca

K160 Brake System Control Module

The control module K160 can also influence the
following control modules to limit the amount of
produced torque:

K20 Engine Control Module

K71 Transmission Control Module

Conditions for Running the DTC

Ignition = On or Vehicle = Service Mode

System Voltage = 9 to 16 V

Conditions for Setting the DTC

Park Brake Actuator Status = Unknown

Actions Taken When the DTC Sets

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4/26/23, 11:09 AM DTC C2A21

A message and/or warning indicator may be displayed to the driver.

Conditions for Clearing the DTC

The conditions for setting the DTC no longer exist.

A history DTC will clear after 40 consecutive malfunction-free ignition cycles.

Reference Information
Schematic Reference

Park Brake System Schematics

Connector End View Reference

Master Electrical Component List

Electrical Information Reference

Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections

om
Wiring Repairs

Scan Tool Reference

Control Module References

Circuit/System Verification
.c
gn
1. Ignition » On / Vehicle » In Service Mode
2. Verify DTC C2A21 is not set.
⇒ If the DTC is set
ia

2.1. Perform the following learn procedure: Park Brake Calibration.

2.2. Apply the electronic parking brake.
rd

2.3. Release the parking brake.

2.4. Verify DTC C2A21 is not set.
ca

⇒ If the DTC is set

Perform all necessary programming and setup procedures for the control module: K160
Brake System Control Module
⇓ If the DTC is not set
All OK.
⇓ If the DTC is not set
3. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
Verification

For control module replacement, programming, and setup refer to: Control Module
References

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4/26/23, 11:15 AM DTC C2A22

2022 Buick Encore GX | | Brakes | Hydraulic Brakes |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5084289

DTC C2A22
Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C2A22 Hydraulic Brake Circuit Leak Detected - Level 1

Symptom Byte Information: Symptom Byte List

Circuit/System Description

om
For an overview of the component/system, refer to: ABS Description and Operation

Conditions for Running the DTC

Ignition/Vehicle = OFF

Conditions for Setting the DTC

.c
gn
Antilock Braking System = Leaking

Actions Taken When the DTC Sets

ia

ABS Indicator Control = ON

Traction/Stability Control Indicator = ON
rd

Conditions for Clearing the DTC

ca

The conditions for setting the DTC no longer exist.

Reference Information
Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

Master Electrical Component List

Electrical Information Reference

Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs

Scan Tool Reference

Control Module References

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4/26/23, 11:15 AM DTC C2A22

Circuit/System Verification

1. Ignition » On / Vehicle » In Service Mode

2. Perform the scan tool control function: Deactivate Brake Boost System
3. Verify there are no leaks in the component/system: Brake System » Refer to: Brake Fluid Loss
4. Apply the brake pedal. — More than 2 times.
5. Ignition/Vehicle » Off — For greater than 10 min
6. Ignition » On / Vehicle » In Service Mode — Brake Pedal Not Applied
7. Perform the scan tool control function: Brake Hydraulics Test
⇒ If the procedure/test does not pass
Refer to: Hydraulic Brake System Bleeding
⇓ If the procedure/test passes
8. Perform the following steps: — 10 times
8.1. Apply the brake pedal slowly from 0- 40bar
8.2. Hold the pressure constant for at least 10s
8.3. Release the brake pedal slowly

om
9. Wait 30s
10. Verify DTC C2A22 is not set.
⇒ If DTC C2A22 is set
.c
Replace the component: A104 Brake Master Cylinder
⇓ If the DTC is not set
gn
11. All OK.

Repair Instructions
ia

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
Verification
rd

For control module replacement, programming, and setup refer to: Control Module References
ca

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4/26/23, 11:00 AM DTC C2A23

2022 Buick Encore GX | | Brakes | Antilock Brake System |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5087327

DTC C2A23
Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C2A23 Wheel Speed Sensor Signals Cross Coupled

Symptom Byte Information: Symptom Byte List

Circuit/System Description

om
For an overview of the component/system, refer to: ABS Description and Operation

Conditions for Running the DTC

Ignition/Vehicle = ON

Conditions for Setting the DTC

.c
gn
Wheel Speed Sensor = Incorrect — Wiring Harness Wire

Actions Taken When the DTC Sets

ia

ABS Indicator Control = ON

Traction/Stability Control Indicator = ON
rd

The EBCM disables the ABS, traction control, stability control and hill start assist for the
duration of the ignition cycle.
ca

Conditions for Clearing the DTC

The conditions for setting the DTC no longer exist.

A history DTC will clear after 40 consecutive malfunction-free ignition cycles.

Reference Information
Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

Master Electrical Component List

Electrical Information Reference

Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs © 2023 General Motors. All rights reserved.

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4/26/23, 11:00 AM DTC C2A23

Scan Tool Reference

Control Module References

Circuit/System Verification

1. Ignition » On / Vehicle » In Service Mode

2. Verify no other DTCs are set.
⇒ If other DTCs are set
Refer to: Diagnostic Trouble Code (DTC) List - Vehicle
⇓ If no other DTCs are set
3. Ignition/Vehicle » Off
4. Verify the following conditions do not exist: The control module's circuit terminals and
connectors = Incorrect
⇒ If a condition exists » Repair or replace as necessary
⇓ If no condition exists
5. Verify DTC C2A23 is not set.

om
⇒ If the DTC is set
Replace the component: K160 Brake System Control Module
⇓ If the DTC is not set
6. All OK.

Repair Instructions
.c
gn
Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
Verification

For control module replacement, programming, and setup refer to: Control Module References
ia
rd
ca

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4/26/23, 10:49 AM DTC C003F

2022 Buick Encore GX | | Brakes | Antilock Brake System |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5051208

DTC C003F
Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C003F Wheel Speed Sensors Direction Correlation

Symptom Byte Information: Symptom Byte List

Circuit/System Description

om
For an overview of the component/system, refer to: ABS Description and Operation

Circuit Description

Signal
.c The sensor produces a frequency modulated signal.
gn
Low Reference Grounded through the control module.
ia

Component Description
rd

The sensor contains a hall-effect sensor and additional

electronics that processes the signal. It detects the
change of strength of the magnetic field caused by the
ca

reluctor ring. When the strength changes, the sensor

B5 Wheel Speed Sensor changes the amount of current it consumes. This
results in a square wave signal of current and voltage.
The control module detects the frequency in which the
signal changes, which is proportional to the rotational
speed.

K160 Brake System Control Module The control module K160 can increase and decrease
the brake pressure on all 4 wheels individually in order
to fulfill these functions:

Antilock Braking
Traction Control
Vehicle Stability Control

The control module K160 can also influence the

following control modules to limit the amount of
produced torque:

K20 Engine Control Module

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4/26/23, 10:49 AM DTC C003F

Component Description

K71 Transmission Control Module

Conditions for Running the DTC

Vehicle Speed = Greater than 15 km/h (10 MPH)

Conditions for Setting the DTC

Electromagnetic Interference
Verify the following parameters are within 6 km/h (4 MPH) of each other: B5 Wheel Speed
Sensor

Actions Taken When the DTC Sets

ABS Indicator Control = ON

Traction/Stability Control Indicator = ON
A message and/or warning indicator may be displayed to the driver.

om
Conditions for Clearing the DTC

The conditions for setting the DTC no longer exist.

Diagnostic Aids .c
Inspect the component for wear or damage: B5 Wheel Speed Sensor .
gn
Do NOT use a magnet to clean the component: Encoder Ring .
Inspect the following components: B5 Wheel Speed Sensor = Correct part .
If the customer comments that the ABS indicator is ON only during moist environmental
ia

conditions (rain, snow, vehicle washed), inspect the wheel speed sensor wiring for signs of
water intrusion.
rd

Reference Information
Schematic Reference
ca

Antilock Brake System Schematics

Connector End View Reference

Master Electrical Component List

Electrical Information Reference

Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs

Scan Tool Reference

Control Module References

Circuit/System Verification

1. Ensure that the tires are inflated to the proper pressure.

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4/26/23, 10:49 AM DTC C003F

2. Confirm that all tires are of the proper size and the same model and brand. If a mis-sized or
non-matching tire model is present, inform the customer that in order for the vehicle stability
system to function normally, tires need to have a uniform size and rolling diameter.
⇒ If not correct
2.1. Repair or replace as necessary
2.2. Ignition » On / Vehicle » In Service Mode
2.3. Under normal operating conditions: Verify DTC C003F is not set.
⇒ If the DTC sets » Replace the component: K160 Brake System Control Module
⇓ If no DTC is set
2.4. All OK.
⇓ If correct
3. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
Verification

om
For control module replacement, programming, and setup refer to: Control Module References

.c
gn
ia
rd
ca

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4/26/23, 10:52 AM DTC C05A3 or C05A4

2022 Buick Encore GX | | Brakes | Antilock Brake System |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5053440

DTC C05A3 or C05A4

Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C05A3 Wheel Speed Sensors Supply Circuit High Voltage

DTC C05A4 Wheel Speed Sensors Supply Circuit Low Voltage

Symptom Byte Information: Symptom Byte List

om
Circuit/System Description

For an overview of the component/system, refer to: ABS Description and Operation

Conditions for Running the DTC

Ignition/Vehicle = ON
.c
gn
Conditions for Setting the DTC

Brake System Control Module = Internal Malfunction

ia

Actions Taken When the DTC Sets

ABS Warning Indicator = ON

rd

Traction/Stability Control Indicator = ON

Brake warning indicator malfunction. = ON
ca

Hill Descent Control = ON

Malfunction Indicator Lamp (MIL) = ON
DTCs listed in the DTC Descriptor category = Type A DTC

Conditions for Clearing the DTC

DTCs listed in the DTC Descriptor category = Type A DTC

Reference Information
Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

Master Electrical Component List

Electrical Information Reference

Circuit Testing
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4/26/23, 10:52 AM DTC C05A3 or C05A4

Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs

Scan Tool Reference

Control Module References

Circuit/System Verification

1. Ignition » On / Vehicle » In Service Mode

2. Verify DTC C05A3, C05A4 is not set.
⇒ If DTC C05A3, C05A4 is set
Replace the component: K160 Brake System Control Module
⇓ If the DTC is not set
3. All OK.

Repair Instructions

om
Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
Verification

For control module replacement, programming, and setup refer to: Control Module References

.c
gn
ia
rd
ca

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4/26/23, 11:14 AM DTC C05B0

2022 Buick Encore GX | | Brakes | Hydraulic Brakes |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5419627

DTC C05B0
Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C05B0 Hydraulic Brake Circuit Leak Detected - Level 2

Symptom Byte Information: Symptom Byte List

Circuit/System Description

om
For an overview of the component/system, refer to: ABS Description and Operation

Conditions for Running the DTC

Ignition/Vehicle = OFF

Conditions for Setting the DTC

.c
gn
Antilock Braking System = Leaking

Actions Taken When the DTC Sets

ia

ABS Indicator Control = ON

Traction/Stability Control Indicator = ON
rd

Conditions for Clearing the DTC

ca

The conditions for setting the DTC no longer exist.

A history DTC will clear after 40 consecutive malfunction-free ignition cycles.

Reference Information
Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

Master Electrical Component List

Electrical Information Reference

Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs

Scan Tool Reference

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4/26/23, 11:14 AM DTC C05B0

Control Module References

Circuit/System Verification

1. Ignition/Vehicle » Off
2. Verify there are no leaks in the component/system: Brake System » Refer to: Brake Fluid Loss
3. Verify the brake pads are fully seated
⇒ If the brake pads are not fully seated
3.1. Disconnect the battery
3.2. Gradually apply the brake pedal to approximately 2/3 of its travel distance.
3.3. Wait 15 seconds and repeat until pedal is firm.
3.4. Reconnect battery.
3.5. Verify DTC C05B0 is not set.
⇒ If DTC C05B0 is not set
All OK.
⇓ If DTC C05B0 is set

om
⇓ If the brake pads are fully seated
4. Clear code DTC C05B0
⇒ If code does not reset
All OK.
⇓ If code does reset .c
5. Ignition » On / Vehicle » In Service Mode
gn
6. Perform the scan tool control function: Brake Hydraulics Test
⇒ If the procedure/test does not pass
Refer to: Hydraulic Brake System Bleeding
ia

⇓ If the procedure/test passes

7. Ignition/Vehicle » Off — For greater than 5 min
rd

8. Fill the brake fluid reservoir to the full level indicator.

9. Ignition/Vehicle » On — For greater than 30 s — Brake Pedal Not Applied
ca

10. Ignition/Vehicle » Off — For greater than 5 min

11. Verify DTC C05B0 is not set.
⇒ If DTC C05B0 is set
Replace the component: A104 Brake Master Cylinder
⇓ If the DTC is not set
12. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
Verification

For control module replacement, programming, and setup refer to: Control Module References

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4/26/23, 10:53 AM DTC C05C2

2022 Buick Encore GX | | Brakes | Antilock Brake System |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5053811

DTC C05C2
Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C05C2 Brake System Plunger Motor Temperature too High

Symptom Byte Information: Symptom Byte List

Circuit/System Description

om
For an overview of the component/system, refer to: ABS Description and Operation

Conditions for Running the DTC

Ignition/Vehicle = ON

Conditions for Setting the DTC

.c
gn
Brake System Plunger Motor Temperature 1 = Greater than 154°C (309°F)
Brake System Plunger Motor Temperature 2 = Greater than 154°C (309°F)
ia

Actions Taken When the DTC Sets

ABS Indicator Control = ON

rd

Traction/Stability Control Indicator = ON

The EBCM disables the ABS, traction control, stability control and hill start assist for the
ca

duration of the ignition cycle.

Malfunction Indicator Lamp (MIL) = ON
DTCs listed in the DTC Descriptor category = Type A DTC

Conditions for Clearing the DTC

DTCs listed in the DTC Descriptor category = Type A DTC

Reference Information
Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

Master Electrical Component List

Electrical Information Reference

Circuit Testing
Connector Repairs© 2023 General Motors. All rights reserved.

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4/26/23, 10:53 AM DTC C05C2

Testing for Intermittent Conditions and Poor Connections

Wiring Repairs

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References

Circuit/System Verification

1. Ignition/Vehicle » Off
2. Brake Pressure Modulator Valve = Ambient Air Temperature
3. Ignition » On / Vehicle » In Service Mode
4. Under normal operating conditions: Verify DTC C05C2 is not set.
⇒ If the DTC sets
Replace the component: K160 Brake System Control Module

om
⇓ If the DTC is not set
5. All OK.

Repair Instructions

.c
Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
Verification
gn
For control module replacement, programming, and setup refer to: Control Module References
ia
rd
ca

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4/26/23, 10:53 AM DTC C05CA or C05CB

2022 Buick Encore GX | | Brakes | Antilock Brake System |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5156580

DTC C05CA or C05CB

Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C05CA Brake Master Cylinder Piston Position Sensor 1 Circuit High Voltage

DTC C05CB Brake Master Cylinder Piston Position Sensor 1 Circuit Low Voltage

Symptom Byte Information: Symptom Byte List

om
Circuit/System Description

For an overview of the component/system, refer to: ABS Description and Operation

Conditions for Running the DTC

Ignition/Vehicle = ON
.c
gn
Conditions for Setting the DTC

Brake Pressure Modulator Valve = Internal Malfunction

ia

Actions Taken When the DTC Sets

ABS Indicator Control = ON

rd

Traction/Stability Control Indicator = ON

DTCs listed in the DTC Descriptor Category = Type A DTC
ca

Conditions for Clearing the DTC

DTCs listed in the DTC Descriptor Category = Type A DTC

Reference Information
Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

Master Electrical Component List

Electrical Information Reference

Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs
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4/26/23, 10:53 AM DTC C05CA or C05CB

Scan Tool Reference

Control Module References

Circuit/System Verification

1. Ignition/Vehicle » Off
2. Ignition » On / Vehicle » In Service Mode
3. Verify DTC C05CA, C05CB is not set.
⇒ If the DTC sets
Replace the component: K160 Brake System Control Module
⇓ If the DTC is not set
4. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
Verification

For control module replacement, programming, and setup refer to: Control Module References

om
.c
gn
ia
rd
ca

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4/26/23, 10:53 AM DTC C05CC

2022 Buick Encore GX | | Brakes | Antilock Brake System |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5589698

DTC C05CC
Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C05CC Brake Master Cylinder Piston Position Sensor 1 Circuit Performance

Symptom Byte Information: Symptom Byte List

Circuit/System Description

om
For an overview of the component/system, refer to: ABS Description and Operation

Conditions for Running the DTC

Ignition/Vehicle = ON

Conditions for Setting the DTC

.c
gn
Brake Pressure Modulator Valve = Internal Malfunction

Actions Taken When the DTC Sets

ia

ABS Indicator Control = ON

Traction/Stability Control Indicator = ON
rd

Conditions for Clearing the DTC

ca

The conditions for setting the DTC no longer exist.

A history DTC will clear after 40 consecutive malfunction-free ignition cycles.

Reference Information
Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

Master Electrical Component List

Electrical Information Reference

Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs

Scan Tool Reference

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4/26/23, 10:53 AM DTC C05CC

Control Module References

Circuit/System Verification

1. Ignition/Vehicle » Off
2. Test or inspect for the following: Brake Pedal = Binding or Sticking
Refer to: Brake System Slow Release
3. Perform the scan tool control function: Brake Master Cylinder Pressure Test
⇒ If the procedure/test passes
3.1. Ignition/Vehicle » Off — For greater than 5 min
3.2. Ignition/Vehicle » On — For greater than 30 s — Brake Pedal Not Applied
3.3. Verify DTC C05CC is not set.
⇒ If the DTC sets
Replace the component: A104 Brake Master Cylinder
⇓ If the DTC is not set
3.4. All OK.

om
⇓ If the procedure/test does not pass
4. Bleed the brake system. Refer to: Hydraulic Brake System Bleeding
5. Perform the scan tool control function: Brake Hydraulics Test
⇒ If the procedure/test does not pass
.c
6. Replace the component: A104 Brake Master Cylinder
⇓ If the procedure/test passes
gn
7. Ignition/Vehicle » Off — For greater than 5 min
8. Ignition/Vehicle » On — For greater than 30 s — Brake Pedal Not Applied
9. Verify DTC C05CC is not set.
ia

⇒ If the DTC sets

Replace the component: A104 Brake Master Cylinder
rd

⇓ If the DTC is not set

10. All OK.
ca

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
Verification

For control module replacement, programming, and setup refer to: Control Module References

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4/26/23, 10:54 AM DTC C05CD-C05CF

2022 Buick Encore GX | | Brakes | Antilock Brake System |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5589702

DTC C05CD-C05CF
Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C05CD Brake Master Cylinder Piston Position Sensor 2 Circuit High Voltage

DTC C05CE Brake Master Cylinder Piston Position Sensor 2 Circuit Low Voltage

DTC C05CF Brake Master Cylinder Piston Position Sensor 2 Circuit Performance

om
Symptom Byte Information: Symptom Byte List

Circuit/System Description

.c
For an overview of the component/system, refer to: ABS Description and Operation

Conditions for Running the DTC

gn
Ignition/Vehicle = ON

Conditions for Setting the DTC

ia

C05CD

Input Rod Position 2 = Short to Voltage

rd

C05CE
ca

Input Rod Position 2 = Short to Ground

C05CF

Input Rod Position 2 = Out Of Range

Actions Taken When the DTC Sets

ABS Warning Indicator = ON

Traction/Stability Control Indicator = ON
Service Brake Assist = ON

Conditions for Clearing the DTC

The conditions for setting the DTC no longer exist.

Reference Information
Schematic Reference

Antilock Brake System Schematics

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4/26/23, 10:54 AM DTC C05CD-C05CF

Connector End View Reference

Master Electrical Component List

Electrical Information Reference

Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs

Scan Tool Reference

Control Module References

Circuit/System Verification

1. Ignition/Vehicle » Off
2. Test or inspect for the following: Brake Pedal = Binding or Sticking
Refer to: Brake System Slow Release

om
3. Perform the scan tool control function: Brake Master Cylinder Pressure Test
⇒ If the procedure/test passes
3.1. Ignition/Vehicle » Off — For greater than 5 min

.c
3.2. Ignition/Vehicle » On — For greater than 30 s — Brake Pedal Not Applied
3.3. Verify DTC C05CD, C05CE, C05CF is not set.
gn
⇒ If the DTC sets
Replace the component: A104 Brake Master Cylinder
⇓ If the DTC is not set
ia

3.4. All OK.

⇓ If the procedure/test does not pass
rd

4. Bleed the brake system. Refer to: Hydraulic Brake System Bleeding
5. Perform the scan tool control function: Brake Hydraulics Test
ca

⇒ If the procedure/test does not pass

6. Replace the component: A104 Brake Master Cylinder
⇓ If the procedure/test passes
7. Ignition/Vehicle » Off — For greater than 5 min
8. Ignition/Vehicle » On — For greater than 30 s — Brake Pedal Not Applied
9. Verify DTC C05CD, C05CE, C05CF is not set.
⇒ If the DTC sets
Replace the component: A104 Brake Master Cylinder
⇓ If the DTC is not set
10. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
Verification

For control module replacement, programming, and setup refer to: Control Module References
© 2023 General Motors. All rights reserved.

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4/26/23, 10:54 AM DTC C05D0

2022 Buick Encore GX | | Brakes | Antilock Brake System |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5589705

DTC C05D0
Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C05D0 Brake Master Cylinder Piston Position Sensor 1-2 Correlation

Symptom Byte Information: Symptom Byte List

Circuit/System Description

om
For an overview of the component/system, refer to: ABS Description and Operation

Conditions for Running the DTC

Ignition/Vehicle = ON

Conditions for Setting the DTC

.c
gn
Brake Pressure Modulator Valve = Internal Malfunction

Actions Taken When the DTC Sets

ia

A message and/or warning indicator may be displayed to the driver.

Malfunction Indicator Lamp (MIL) = ON
rd

DTCs listed in the DTC Descriptor category = Type A DTC

Conditions for Clearing the DTC

ca

DTCs listed in the DTC Descriptor category = Type A DTC

Diagnostic Aids

This condition could cause DTCs to set without any fault present. — The brake and the accelerator
pedals are pressed simultaneously for greater than 10 s.

Reference Information
Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

Master Electrical Component List

Electrical Information Reference

Circuit Testing
Connector Repairs
© 2023 General Motors. All rights reserved.

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4/26/23, 10:54 AM DTC C05D0

Testing for Intermittent Conditions and Poor Connections

Wiring Repairs

Scan Tool Reference

Control Module References

Circuit/System Verification

1. Verify there are no related DTCs set in the following system: Stop Lamps
⇒ If the DTC is set
Refer to: Diagnostic Trouble Code (DTC) List - Vehicle
⇓ If the DTC is not set
2. Test or inspect for the following: Brake Pedal = Binding or Sticking
Refer to: Brake System Slow Release
3. Perform the scan tool control function: Brake Master Cylinder Pressure Test
⇒ If the procedure/test passes
3.1. Ignition/Vehicle » Off — For greater than 5 min

om
3.2. Ignition/Vehicle » On — For greater than 60 s — Brake Pedal Not Applied
3.3. Apply and hold the brake pedal. to half stroke — For greater than 2 s
3.4. Slowly release the brake pedal.

.c
3.5. Verify DTC C05D0 is not set.
⇒ If the DTC sets
gn
Replace the component: A104 Brake Master Cylinder
⇓ If the DTC is not set
3.6. All OK.
ia

⇓ If the procedure/test does not pass

4. Bleed the brake system. Refer to: Hydraulic Brake System Bleeding
rd

5. Perform the scan tool control function: Brake Hydraulics Test

⇒ If the procedure/test does not pass
ca

6. Replace the component: A104 Brake Master Cylinder

⇓ If the procedure/test passes
7. Ignition/Vehicle » Off — For greater than 5 min
8. Ignition/Vehicle » On — For greater than 60 s — Brake Pedal Not Applied
9. Apply and hold the brake pedal. to half stroke — For greater than 2 s
10. Slowly release the brake pedal.
11. Verify DTC C05D0 is not set.
⇒ If the DTC sets
Replace the component: A104 Brake Master Cylinder
⇓ If the DTC is not set
12. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
Verification
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4/26/23, 10:54 AM DTC C05D0

For control module replacement, programming, and setup refer to: Control Module References

om
.c
gn
ia
rd
ca

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4/26/23, 10:54 AM DTC C05D2

2022 Buick Encore GX | | Brakes | Antilock Brake System |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5589708

DTC C05D2
Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C05D2 Brake Master Cylinder Piston Excessive Travel Detected

Symptom Byte Information: Symptom Byte List

Circuit/System Description

om
For an overview of the component/system, refer to: ABS Description and Operation

Conditions for Running the DTC

Ignition/Vehicle = ON

Conditions for Setting the DTC

.c
gn
Brake Pressure Sensor = Low

Actions Taken When the DTC Sets

ia

Malfunction Indicator Lamp (MIL) = ON

A message and/or warning indicator may be displayed to the driver.
rd

DTCs listed in the DTC Descriptor category = Type A DTC

Conditions for Clearing the DTC

ca

C05D2 = Type A DTC

Reference Information
Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

Master Electrical Component List

Electrical Information Reference

Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs

Scan Tool Reference

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4/26/23, 10:54 AM DTC C05D2

Control Module References

Circuit/System Verification

1. Ignition/Vehicle » Off
2. Inspect for damage — Brake System Brake System Slow Release
3. Inspect for Leaks — Brake System Hydraulic Brake System Diagnosis
4. Ignition/Vehicle » Off — For greater than 5 min
5. Ignition/Vehicle » On — For greater than 60 s — Brake Pedal Not Applied
6. Apply and hold the brake pedal. to half stroke — For greater than 2 s
7. Slowly release the brake pedal.
8. Verify DTC C05D2 is not set.
⇒ If the DTC is not set
All OK.
⇓ If the DTC sets
9. Perform the scan tool control function: Brake Master Cylinder Pressure Test

om
⇒ If the procedure/test passes
9.1. Ignition/Vehicle » Off — For greater than 5 min
9.2. Ignition/Vehicle » On — For greater than 60 s — Brake Pedal Not Applied
9.3. Apply and hold the brake pedal. to half stroke — For greater than 2 s
.c
9.4. Slowly release the brake pedal.
9.5. Verify DTC C05D2 is not set.
gn
⇒ If the DTC sets
Replace the component: A104 Brake Master Cylinder
⇓ If the DTC is not set
ia

9.6. All OK.

⇓ If the procedure/test does not pass
rd

10. Bleed the brake system. Refer to: Hydraulic Brake System Bleeding
11. Perform the scan tool control function: Brake Hydraulics Test
ca

⇒ If the procedure/test does not pass

12. Replace the component: A104 Brake Master Cylinder
⇓ If the procedure/test passes
13. Ignition/Vehicle » Off — For greater than 5 min
14. Ignition/Vehicle » On — For greater than 60 s — Brake Pedal Not Applied
15. Apply and hold the brake pedal. to half stroke — For greater than 2 s
16. Slowly release the brake pedal.
17. Verify DTC C05D2 is not set.
⇒ If the DTC sets
Replace the component: A104 Brake Master Cylinder
⇓ If the DTC is not set
18. All OK.

Repair Instructions

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4/26/23, 10:54 AM DTC C05D2

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
Verification

For control module replacement, programming, and setup refer to: Control Module References

om
.c
gn
ia
rd
ca

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4/26/23, 10:55 AM DTC C05D3

2022 Buick Encore GX | | Brakes | Antilock Brake System |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5056091

DTC C05D3
Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C05D3 Driver Applied Pressure Higher Than Expected

Symptom Byte Information: Symptom Byte List

Circuit/System Description

om
For an overview of the component/system, refer to: ABS Description and Operation

Conditions for Running the DTC

Ignition/Vehicle = ON

Conditions for Setting the DTC

.c
gn
Brake Pressure Sensor = Out of Range High

Actions Taken When the DTC Sets

ia

ABS Indicator Control = ON

Traction/Stability Control Indicator = ON
rd

A message and/or warning indicator may be displayed to the driver.

DTC is a Type A DTC
ca

Conditions for Clearing the DTC

DTC is a Type A DTC

Reference Information
Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

Master Electrical Component List

Electrical Information Reference

Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs
© 2023 General Motors. All rights reserved.

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4/26/23, 10:55 AM DTC C05D3

Scan Tool Reference

Control Module References

Circuit/System Verification

1. Ignition/Vehicle » Off
2. Inspect for damage — Brake System Brake System Slow Release
3. Ignition/Vehicle » Off — For greater than 5 min
4. Ignition/Vehicle » On — For greater than 60 s — Brake Pedal Not Applied
5. Apply and hold the brake pedal. to half stroke — For greater than 2 s
6. Slowly release the brake pedal.
7. Verify DTC C05D3 is not set.
⇒ If the DTC sets
Replace the component: A104 Brake Master Cylinder
⇓ If the DTC is not set
8. All OK.

om
Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
Verification
.c
For control module replacement, programming, and setup refer to: Control Module References
gn
ia
rd
ca

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4/26/23, 10:55 AM DTC C05D5

2022 Buick Encore GX | | Brakes | Antilock Brake System |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5062784

DTC C05D5
Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C05D5 Brake Fluid Reservoir Separating Solenoid Valve

Symptom Byte Information: Symptom Byte List

Circuit/System Description

om
For an overview of the component/system, refer to: ABS Description and Operation

Conditions for Running the DTC

Ignition/Vehicle = ON

Conditions for Setting the DTC

.c
gn
Solenoid Valve — Malfunction

Actions Taken When the DTC Sets

ia

ABS Indicator Control = ON

Traction/Stability Control Indicator = ON
rd

Malfunction Indicator Lamp (MIL) = ON

Brake warning indicator malfunction. = ON
ca

DTCs listed in the DTC Descriptor category = Type A DTC

Conditions for Clearing the DTC

DTCs listed in the DTC Descriptor category = Type A DTC

Reference Information
Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

Master Electrical Component List

Electrical Information Reference

Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
© 2023 General Motors. All rights reserved.

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4/26/23, 10:55 AM DTC C05D5

Wiring Repairs

Scan Tool Reference

Control Module References

Circuit/System Verification

1. Ignition » On / Vehicle » In Service Mode

2. Under normal operating conditions: Verify DTC C05D5 is not set.
⇒ If the DTC sets
Replace the component: K160 Brake System Control Module
⇓ If the DTC is not set
3. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
Verification

om
For control module replacement, programming, and setup refer to: Control Module References

.c
gn
ia
rd
ca

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4/26/23, 10:50 AM DTC C006B

2022 Buick Encore GX | | Brakes | Antilock Brake System |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5080974

DTC C006B
Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C006B Stability System Active Too Long

Symptom Byte Information: Symptom Byte List

Circuit/System Description

om
For an overview of the component/system, refer to: ABS Description and Operation

Conditions for Running the DTC

.c
Vehicle Speed = Greater than 22 km/h (14 MPH)

Conditions for Setting the DTC

gn
Yaw Rate Signal = Not Plausible
Steering Angle Sensor = Not Plausible
ia

Lateral Acceleration Signal = Not Plausible

Actions Taken When the DTC Sets

rd

ABS Warning Indicator = ON

Traction/Stability Control Indicator = ON
ca

A message and/or warning indicator may be displayed to the driver.

Conditions for Clearing the DTC

The conditions for setting the DTC no longer exist.

Reference Information
Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

Master Electrical Component List

Electrical Information Reference

Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
© 2023 General Motors. All rights reserved.

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4/26/23, 10:50 AM DTC C006B

Wiring Repairs

Scan Tool Reference

Control Module References

Circuit/System Verification

1. Verify there are no other DTCs set, except for DTC C006B.
⇒ If any other DTCs are set
Refer to: Diagnostic Trouble Code (DTC) List - Vehicle
⇓ If no other DTCs are set
2. Replace the component: K36 Inflatable Restraint Sensing and Diagnostic Module
3. Under normal operating conditions: Verify that no DTCs are set.
⇒ If the DTC sets
Replace the component: K160 Brake System Control Module
⇓ If no DTC is set
4. All OK.

om
Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
Verification
.c
For control module replacement, programming, and setup refer to: Control Module References
gn
ia
rd
ca

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4/26/23, 10:55 AM DTC C10EE

2022 Buick Encore GX | | Brakes | Antilock Brake System |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5063750

DTC C10EE
Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C10EE Wheel Speed Sensor Frequency

Symptom Byte Information: Symptom Byte List

Circuit/System Description

om
For an overview of the component/system, refer to: ABS Description and Operation

Component Description
.c The sensor contains a hall-effect sensor and additional
electronics that processes the signal. It detects the
gn
change of strength of the magnetic field caused by the
reluctor ring. When the strength changes, the sensor
B5 Wheel Speed Sensor changes the amount of current it consumes. This
results in a square wave signal of current and voltage.
ia

The control module detects the frequency in which the

signal changes, which is proportional to the rotational
rd

speed.

The control module K160 can increase and decrease

ca

the brake pressure on all 4 wheels individually in order

to fulfill these functions:

Antilock Braking
Traction Control
Vehicle Stability Control
K160 Brake System Control Module
The control module K160 can also influence the
following control modules to limit the amount of
produced torque:

K20 Engine Control Module

K71 Transmission Control Module

Conditions for Running the DTC

Vehicle Speed Greater than 17 km/h (10 MPH)

Brake Pedal = Not applied
© 2023 General Motors. All rights reserved.
Conditions for Setting the DTC
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4/26/23, 10:55 AM DTC C10EE

Conditions for Setting the DTC

The following parameters are not within 20% of each other: B5 Wheel Speed Sensor

Actions Taken When the DTC Sets

ABS Indicator Control = ON

Traction/Stability Control Indicator = ON
A message and/or warning indicator may be displayed to the driver.

Conditions for Clearing the DTC

The conditions for setting the DTC no longer exist.

Diagnostic Aids

Inspect the component for wear or damage: B5 Wheel Speed Sensor .

Do NOT use a magnet to clean the component: Encoder Ring .
Inspect the following components: B5 Wheel Speed Sensor = Correct part .
If the customer comments that the ABS indicator is ON only during moist environmental
conditions (rain, snow, vehicle washed), inspect the wheel speed sensor wiring for signs of
water intrusion.

om
Reference Information
Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

.c
gn
Master Electrical Component List

Electrical Information Reference

ia

Circuit Testing
Connector Repairs
rd

Testing for Intermittent Conditions and Poor Connections

Wiring Repairs
ca

Scan Tool Reference

Control Module References

Circuit/System Verification

1. Ensure that the tires are inflated to the proper pressure.

2. Confirm that all tires are of the proper size and the same model and brand. If a mis-sized or
non-matching tire model is present, inform the customer that in order for the vehicle stability
system to function normally, tires need to have a uniform size and rolling diameter.
⇒ If not correct
2.1. Repair or replace as necessary
2.2. Ignition » On / Vehicle » In Service Mode
2.3. Under normal operating conditions: Verify DTC C10EE is not set.
⇒ If the DTC sets » Replace the component: K160 Brake System Control Module
⇓ If no DTC is set
2.4. All OK.
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4/26/23, 10:55 AM DTC C10EE

⇓ If correct
3. Under normal operating conditions: Verify DTC C10EE is not set.
⇒ If the DTC sets » Replace the component: K160 Brake System Control Module
⇓ If no DTC is set
4. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
Verification

For control module replacement, programming, and setup refer to: Control Module References

om
.c
gn
ia
rd
ca

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4/26/23, 11:14 AM DTC C12F9

2022 Buick Encore GX | | Brakes | Hydraulic Brakes |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5081287

DTC C12F9
Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C12F9 Hydraulic Brake Circuit Blocked

Symptom Byte Information: Symptom Byte List

Circuit/System Description

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For an overview of the component/system, refer to: ABS Description and Operation

Conditions for Running the DTC

Ignition/Vehicle = ON

Conditions for Setting the DTC

.c
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Brakes = Applied

Actions Taken When the DTC Sets

ia

ABS Warning Indicator = ON

Traction/Stability Control Indicator = ON
rd

Service Brake Assist — Warning Message = ON

DTCs listed in the DTC Descriptor Category = Type A DTC
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Conditions for Clearing the DTC

DTCs listed in the DTC Descriptor Category = Type A DTC

Reference Information
Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

Master Electrical Component List

Electrical Information Reference

Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs
© 2023 General Motors. All rights reserved.

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4/26/23, 11:14 AM DTC C12F9

Scan Tool Reference

Control Module References

Circuit/System Verification

1. Ignition/Vehicle » Off
2. Inspect for damage Refer to: Brake Pedal Excessive Effort
3. Ignition/Vehicle » Off — For greater than 10 min
4. Ignition/Vehicle » On — For greater than 15 s — Brake Pedal Not Applied
5. Apply and hold the brake pedal. — For greater than 2 s
6. Slowly release the brake pedal.
7. Verify DTC C12F9 is not set.
⇒ If DTC C12F9 is set
Replace the component: A104 Brake Master Cylinder
⇓ If the DTC is not set
8. All OK.

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Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
Verification
.c
For control module replacement, programming, and setup refer to: Control Module References
gn
ia
rd
ca

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4/26/23, 10:58 AM DTC C15C6

2022 Buick Encore GX | | Brakes | Antilock Brake System |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5236031

DTC C15C6
Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C15C6 Vehicle Hold Enable Status Not Plausible

Symptom Byte Information: Symptom Byte List

Circuit/System Description

om
For an overview of the component/system, refer to: ABS Description and Operation

Conditions for Running the DTC

Ignition/Vehicle = ON

Conditions for Setting the DTC

.c
gn
Vehicle Hold Enable Status Not Plausible

Actions Taken When the DTC Sets

ia

No additional actions taken

Conditions for Clearing the DTC

rd

The conditions for setting the DTC no longer exist.

ca

Diagnostic Aids

Diagnose other DTCs first.

Reference Information
Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

Master Electrical Component List

Electrical Information Reference

Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs
© 2023 General Motors. All rights reserved.

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4/26/23, 10:58 AM DTC C15C6

Scan Tool Reference

Control Module References

Circuit/System Verification

1. Ignition » On / Vehicle » In Service Mode

2. Verify no other DTCs are set.
⇒ If other DTCs are set
Refer to: Diagnostic Trouble Code (DTC) List - Vehicle
⇓ If no other DTCs are set
3. Replace the component: K160 Brake System Control Module
4. Verify the DTC does not set.
⇒ If the DTC is set
⇒ Replace the component: K160 Brake System Control Module
⇓ If the DTC is not set
5. All OK.

om
Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
Verification
.c
For control module replacement, programming, and setup refer to: Control Module References
gn
ia
rd
ca

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4/26/23, 11:14 AM DTC C15C7

2022 Buick Encore GX | | Brakes | Hydraulic Brakes |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5157358

DTC C15C7
Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C15C7 Brake Boost System Deactivated

Symptom Byte Information: Symptom Byte List

Circuit/System Description

om
This DTC will set if the brake boost system is left in the deactivated mode. The DTC will clear once
the brake boost system has been activated with a scan tool by passing the Brakes Hydraulics Test.

Conditions for Running the DTC

Ignition/Vehicle = ON
.c
gn
Conditions for Setting the DTC

Brake boost system is deactivated

ia

Actions Taken When the DTC Sets

ABS Indicator Control = ON

rd

Traction/Stability Control Indicator = ON

Brake warning indicator malfunction. = ON
ca

DTCs listed in the DTC Descriptor category = Type A DTC

Conditions for Clearing the DTC

DTCs listed in the DTC Descriptor category = Type A DTC

Reference Information
Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

Master Electrical Component List

Electrical Information Reference

Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs © 2023 General Motors. All rights reserved.

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4/26/23, 11:14 AM DTC C15C7

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References

Circuit/System Verification

1. Visually inspect the brake fluid level through the brake master cylinder reservoir. Refer to:
Brake Master Cylinder Reservoir Filling
2. Disconnect the electrical connector: B20 Brake Fluid Level Sensor
3. Perform the scan tool control function: Brake Hydraulics Test
⇒ If the procedure/test does not pass
Refer to: Hydraulic Brake System Bleeding
⇓ If the procedure/test passes
4. Confirm the B20 Brake Fluid Level Sensor electrical connector is connected.
5. Ignition/Vehicle » Off — For greater than 10 s

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Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
Verification
.c
gn
ia
rd
ca

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4/26/23, 10:58 AM DTC C15D5

2022 Buick Encore GX | | Brakes | Antilock Brake System |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5084140

DTC C15D5
Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C15D5 Antilock Braking System Active Too Long

Symptom Byte Information: Symptom Byte List

Circuit/System Description

om
For an overview of the component/system, refer to: ABS Description and Operation

Conditions for Running the DTC

Ignition/Vehicle = ON

Conditions for Setting the DTC

.c
gn
Antilock Braking System Active Too Long

Actions Taken When the DTC Sets

ia

ABS Indicator Control = ON

Traction/Stability Control Indicator = ON
rd

A message and/or warning indicator may be displayed to the driver.

Conditions for Clearing the DTC

ca

The conditions for setting the DTC no longer exist.

A history DTC will clear after 40 consecutive malfunction-free ignition cycles.

Diagnostic Aids

Inspect the component for wear or damage: B5 Wheel Speed Sensor .

Do NOT use a magnet to clean the component: Encoder Ring .
Inspect the following components: B5 Wheel Speed Sensor = Correct part .
If the customer comments that the ABS indicator is ON only during moist environmental
conditions (rain, snow, vehicle washed), inspect the wheel speed sensor wiring for signs of
water intrusion.

Reference Information
Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

© 2023 General Motors. All rights reserved.

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4/26/23, 10:58 AM DTC C15D5

Master Electrical Component List

Electrical Information Reference

Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs

Scan Tool Reference

Control Module References

Circuit/System Verification

1. Verify there are no DTCs set related to the following component/system: Antilock Braking
System
⇒ If any of the DTCs are set
Refer to: Diagnostic Trouble Code (DTC) List - Vehicle
⇓ If none of the DTCs are set

om
2. Inspect the following components:
B5 Wheel Speed Sensor ≠ Correct part
B5 Wheel Speed Sensor = Visible Damage
⇒ If a condition exists .c
Replace the component: B5 Wheel Speed Sensor
gn
⇓ If no conditions exist
3. Test drive the vehicle.
All sensors must show the same speed when driving in a straight line at a speed greater than
ia

40 km/h (25 MPH).

4. Verify the following parameters are within 1.6 km/h (1 MPH) of each other: Wheel Speed
Sensor
rd

⇒ If within 1.6 km/h (1 MPH) of each other

Replace the component: K160 Brake System Control Module
ca

⇓ If not within 1.6 km/h (1 MPH) of each other

5. Replace the appropriate component: B5 Wheel Speed Sensor
6. Verify the DTC does not set.
⇒ If the DTC is set
Replace the component: K160 Brake System Control Module
⇓ If the DTC is not set
7. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
Verification

Front Wheel Speed Sensor Replacement

Rear Wheel Speed Sensor Replacement
For control module replacement, programming, and setup refer to: Control Module
References
© 2023 General Motors. All rights reserved.

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4/26/23, 11:13 AM DTC C0021

2022 Buick Encore GX | | Brakes | Hydraulic Brakes |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5051179

DTC C0021
Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C0021 Brake System Performance

Symptom Byte Information: Symptom Byte List

Circuit/System Description

om
For an overview of the component/system, refer to: ABS Description and Operation

Conditions for Running the DTC

Ignition/Vehicle = OFF

Conditions for Setting the DTC

.c
gn
Ignition Off = Incomplete

The above conditions must occur for 10 consecutive ignition cycles.

ia

Actions Taken When the DTC Sets

ABS Indicator Control = ON

rd

Traction/Stability Control Indicator = ON

Malfunction Indicator Lamp (MIL) = ON
ca

Brake warning indicator malfunction. = ON

A message and/or warning indicator may be displayed to the driver.
C0021 = Type A DTC

Conditions for Clearing the DTC

C0021 = Type A DTC

Reference Information
Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

Master Electrical Component List

Electrical Information Reference

Circuit Testing
© 2023 General Motors. All rights reserved.

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4/26/23, 11:13 AM DTC C0021

Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs

Scan Tool Reference

Control Module References

Circuit/System Verification

1. Ignition/Vehicle » Off = 10 s — Brake Pedal = Not applied

2. Ignition » On / Vehicle » In Service Mode
3. Perform the scan tool control function: Brake Hydraulics Test
⇒ If the procedure/test does not pass
Refer to: Hydraulic Brake System Bleeding
⇓ If the procedure/test passes
4. Verify DTC C0021 is not set.
⇒ If DTC C0021 is set

om
Replace the component: A104 Brake Master Cylinder
⇓ If the DTC is not set
5. All OK.

Repair Instructions .c
Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
gn
Verification

For control module replacement, programming, and setup refer to: Control Module
ia

References
rd
ca

© 2023 General Motors. All rights reserved.

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4/26/23, 10:49 AM DTC C0024

2022 Buick Encore GX | | Brakes | Antilock Brake System |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5051186

DTC C0024
Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C0024 Brake Pedal Simulator Separating Solenoid Valve

Symptom Byte Information: Symptom Byte List

Circuit/System Description

om
For an overview of the component/system, refer to: ABS Description and Operation

Conditions for Running the DTC

Ignition/Vehicle = ON

Conditions for Setting the DTC

.c
gn
K160 Brake System Control Module = Internal Malfunction

Actions Taken When the DTC Sets

ia

Brake warning indicator malfunction. = ON

ABS Warning Indicator = ON
rd

Traction/Stability Control Indicator = ON

Hill Descent Control = ON
ca

Vehicle Speed Limit = Less than 100 km/h (62 MPH)

Malfunction Indicator Lamp (MIL) = ON
Brake Assist = None
or
Brake Assist = Limited
DTCs listed in the DTC Descriptor category = Type A DTC

Conditions for Clearing the DTC

DTCs listed in the DTC Descriptor category = Type A DTC

Diagnostic Aids

Diagnose other DTCs first.

Reference Information
Schematic Reference

Antilock Brake System Schematics

© 2023 General Motors. All rights reserved.

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4/26/23, 10:49 AM DTC C0024

Connector End View Reference

Master Electrical Component List

Electrical Information Reference

Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References

Circuit/System Verification

om
1. Ignition » On / Vehicle » In Service Mode
2. Verify DTC C0024 is not set.
⇒ If DTC C0024 is set
Replace the component: K160 Brake System Control Module
⇓ If the DTC is not set
3. All OK.
.c
gn
Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
ia

Verification

For control module replacement, programming, and setup refer to: Control Module References
rd
ca

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4/26/23, 11:13 AM DTC C0049

2022 Buick Encore GX | | Brakes | Hydraulic Brakes |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 4991764

DTC C0049
Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C0049 Low Brake Fluid Indicated

Symptom Byte Information: Symptom Byte List

Diagnostic Fault Information

om
Circuit Short to Open/High Short to Signal
Circuit Function Ground Resistance Voltage Performance

333

1151
.c Signal

Ground
C0049 00

—
C004B 15

C004B 15
C004B 15

—
—

—
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Scan Tool Data
ia

Brake Fluid Level Switch

Normal
rd

Control Module Data List Values Operation

The parameter
ca

Hydraulic Brakes will display low

K160 Brake System Control Module V
Data voltage with low
brake fluid

Circuit/System Description

The B20 Brake Fluid Level Switch is a normally open switch that closes when the brake fluid is
below the minimum level. The switch is magnetically actuated by a float. The K160 Brake System
Control Module monitors the switch on signal circuit 333 and the switch receives a constant
ground on ground circuit 1151.

Conditions for Running the DTC

Ignition/Vehicle = ON

Conditions for Setting the DTC

Brake Fluid Level Indicator Switch = Low — For greater than 5 s

Ground circuit = open
Signal circuit = open /Short
© 2023 to Ground
General Motors. All rights reserved.

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4/26/23, 11:13 AM DTC C0049

Actions Taken When the DTC Sets

Brake warning indicator malfunction. = ON

ABS Warning Indicator = ON
Traction/Stability Control Indicator = ON
Hill Descent Control = ON
Brake Assist = None
A message and/or warning indicator may be displayed to the driver.

Conditions for Clearing the DTC

The conditions for setting the DTC no longer exist.

Reference Information
Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

om
Master Electrical Component List

Electrical Information Reference

Circuit Testing
Connector Repairs
.c
Testing for Intermittent Conditions and Poor Connections
gn
Wiring Repairs

Scan Tool Reference

ia

Control Module References

Circuit/System Verification
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1. Ignition/Vehicle » Off
2. Verify the condition does not exist: Incorrect fluid level or condition
ca

⇒ If a condition exists
Repair or replace as necessary
⇓ If no condition exists
3. Refer to Circuit/System Testing.

Circuit/System Testing

1. Ignition OFF, disconnect the connector at the B20 Brake Fluid Level Switch.
2. Verify a test lamp illuminates between ground terminal 2 and B+
⇒ If the test lamp does not illuminate
Repair the open/high resistance on circuit 1151 or the ground connection.
⇓ If the test lamp illuminates
3. Verify the scan tool Brake Fluid Level Switch parameter is greater than 10 V
⇒ If the parameter is less than 10 V
3.1. Test circuit 333 for a short to ground.
⇒ If a short to ground is found,
© 2023 repair
General the fault
Motors. on thereserved.
All rights circuit.

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4/26/23, 11:13 AM DTC C0049

⇓ If a short to ground is not found

3.2. Replace the K160 Brake System Control Module.
⇓ If the parameter is greater than 10 V
4. Connect a 3 A fused jumper wire between signal terminal 1 and ground terminal 2.
5. Verify the scan tool Brake Fluid Level Switch parameter is less than 1 V.
⇒ If the parameter is 1 V or greater
5.1. Test circuit 333 for a short to voltage.
⇒ If an short to voltage is found, repair the fault on the circuit.
⇓ If a short to voltage is found is not found
5.2. Test circuit 333 for an open/high resistance.
⇒ If an open/high resistance is found, repair the fault on the circuit.
⇓ If a open/high resistance is not found
5.3. Replace the K160 Brake System Control Module.
⇓ If the parameter is less than 1 V
6. Replace the B20 Brake Fluid Level Switch.

om
Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
Verification
.c
For control module replacement, programming, and setup refer to: Control Module
gn
References
ia
rd
ca

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4/26/23, 10:49 AM DTC C0051

2022 Buick Encore GX | | Brakes | Antilock Brake System |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5925593

DTC C0051
Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C0051 Steering Wheel Angle Sensor Signal

Symptom Byte Information: Symptom Byte List

Circuit/System Description

om
For an overview of the component/system, refer to: ABS Description and Operation

Component Description
.c Steering shaft torque and position sensors inside the
control module measure the input from the driver.
gn
K43 Power Steering Control Module
The electric power steering motor amplifies the torque
that the driver applies to the steering wheel.
ia

The control module K160 can increase and decrease

the brake pressure on all 4 wheels individually in order
to fulfill these functions:
rd

Antilock Braking
Traction Control
ca

Vehicle Stability Control

K160 Brake System Control Module
The control module K160 can also influence the
following control modules to limit the amount of
produced torque:

K20 Engine Control Module

K71 Transmission Control Module

Conditions for Running the DTC

Ignition » On / Vehicle » In Service Mode

Ensure the steering wheel and the front wheels are in the straight ahead position.

Conditions for Setting the DTC

C0051 0F

Steering Wheel Angle Rate of Change

© 2023 Sensor
General Circuit
Motors. All = Greater
rights than 30°
reserved.

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4/26/23, 10:49 AM DTC C0051

C0051 19 1A

Steering Wheel Angle Sensor Signal = Greater than the maximum threshold

C0051 4B

Steering Wheel Angle Sensor Signal = Not Learned

C0051 5A

Steering Angle Sensor = Not Plausible

Actions Taken When the DTC Sets

A message and/or warning indicator may be displayed to the driver.

Conditions for Clearing the DTC

The conditions for setting the DTC no longer exist.

A history DTC will clear after 40 consecutive malfunction-free ignition cycles.

Diagnostic Aids

om
Check the tire inflation pressure and adjust to the tire inflation specifications as necessary.
The vehicle should not pull in either direction causing the steering wheel to be off center
while driving in a straight line on a level.
Confirm that all tires are of the proper size and the same model and brand. If a mis-sized or
.c
non-matching tire model is present, inform the customer that in order for the vehicle
stability system to function normally, tires need to have a uniform size and rolling diameter.
gn
Inspect the serial data circuits and connections at the power steering control module and
the electronic brake control module. They should be free from sources of electromagnetic
interference and the connections should be clean and tight.
ia

Reference Information
Schematic Reference
rd

Antilock Brake System Schematics

Connector End View Reference

ca

Master Electrical Component List

Electrical Information Reference

Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs

Scan Tool Reference

Control Module References

Circuit/System Verification

1. Ignition » On / Vehicle » In Service Mode

2. Verify there are no DTCs set related to the following component/system: K43 Power Steering
Control Module
⇒ If any of the DTCs ©
are set General Motors. All rights reserved.
2023

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4/26/23, 10:49 AM DTC C0051

Refer to: Diagnostic Trouble Code (DTC) List - Vehicle

⇓ If none of the DTCs are set
3. Perform the scan tool learn/reset function: Steering Wheel Angle Sensor Centering
4. Verify that no DTCs are set.
⇒ If any DTC is set
4.1. Replace the component: Steering Column
4.2. Verify that no DTCs are set.
⇒ If the DTC sets » Replace the component: K160 Brake System Control Module
⇓ If the DTC is not set » All OK.
⇓ If the DTC is not set
5. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
Verification

om
For control module replacement, programming, and setup refer to: Control Module References

.c
gn
ia
rd
ca

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4/26/23, 10:51 AM DTC C053B

2022 Buick Encore GX | | Brakes | Antilock Brake System |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5052310

DTC C053B
Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C053B ABS Solenoid Valves Supply Circuit

Symptom Byte Information: Symptom Byte List

Circuit/System Description

om
For an overview of the component/system, refer to: ABS Description and Operation

Conditions for Running the DTC

Ignition/Vehicle = ON

Conditions for Setting the DTC

.c
gn
Solenoid Valve — Malfunction

Actions Taken When the DTC Sets

ia

ABS Indicator Control = ON

Traction/Stability Control Indicator = ON
rd

DTCs listed in the DTC Descriptor Category = Type A DTC

Conditions for Clearing the DTC

ca

DTCs listed in the DTC Descriptor Category = Type A DTC

Reference Information
Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

Master Electrical Component List

Electrical Information Reference

Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs

Scan Tool Reference

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4/26/23, 10:51 AM DTC C053B

Control Module References

Circuit/System Verification

1. Ignition » On / Vehicle » In Service Mode

2. Under normal operating conditions: Verify DTC C053B is not set.
⇒ If the DTC sets
Replace the component: K160 Brake System Control Module
⇓ If the DTC is not set
3. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
Verification

For control module replacement, programming, and setup refer to: Control Module References

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4/26/23, 10:52 AM DTC C053D-C053F

2022 Buick Encore GX | | Brakes | Antilock Brake System |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5052380

DTC C053D-C053F
Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C053D Brake Pressure Sensor Circuit Performance

DTC C053E Brake Pressure Sensor Circuit Low Voltage

DTC C053F Brake Pressure Sensor Circuit High Voltage

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Symptom Byte Information: Symptom Byte List

Circuit/System Description

.c
For an overview of the component/system, refer to: ABS Description and Operation

Conditions for Running the DTC

gn
Engine Running
Slowly press and release the brake pedal.
ia

Conditions for Setting the DTC

Brake Pedal Pressure Signal Invalid or Erratic

rd

Actions Taken When the DTC Sets

ca

ABS Warning Indicator = ON

Traction/Stability Control Indicator = ON
Brake warning indicator malfunction. = ON
Hill Descent Control = ON
Vehicle Speed Limit = Less than 100 km/h (62 MPH)
Malfunction Indicator Lamp (MIL) = ON
DTCs listed in the DTC Descriptor category = Type A DTC

Conditions for Clearing the DTC

DTCs listed in the DTC Descriptor category = Type A DTC

Reference Information
Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

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4/26/23, 10:52 AM DTC C053D-C053F

Master Electrical Component List

Electrical Information Reference

Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References

Circuit/System Verification

1. Ignition » On / Vehicle » In Service Mode

2. Verify the DTC does not set.

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⇒ If the DTC sets
Replace the component: A104 Brake Master Cylinder
⇓ If the DTC is not set
3. All OK.

Repair Instructions
.c
gn
Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
Verification
ia

For control module replacement, programming, and setup refer to: Control Module References
rd
ca

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4/26/23, 11:14 AM DTC C055F

2022 Buick Encore GX | | Brakes | Hydraulic Brakes |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5589710

DTC C055F
Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C055F Brake Booster Hydraulics Performance

Symptom Byte Information: Symptom Byte List

Circuit/System Description

om
For an overview of the component/system, refer to: ABS Description and Operation

Conditions for Running the DTC

Ignition/Vehicle = OFF

Conditions for Setting the DTC

.c
gn
Brake System Control Module = Internal Malfunction

Actions Taken When the DTC Sets

ia

A message and/or warning indicator may be displayed to the driver.

DTCs listed in the DTC Descriptor category = Type A DTC
rd

Conditions for Clearing the DTC

ca

DTCs listed in the DTC Descriptor category = Type A DTC

Reference Information
Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

Master Electrical Component List

Electrical Information Reference

Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs

Scan Tool Reference

Control Module References

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4/26/23, 11:14 AM DTC C055F

Circuit/System Verification

1. Ignition/Vehicle » Off
2. Inspect for Leaks — Brake System Hydraulic Brake System Diagnosis
3. Ignition/Vehicle » Off — For greater than 5 min
4. Fill the brake fluid reservoir to the full level indicator.
5. Ignition/Vehicle » On — For greater than 30 s — Brake Pedal Not Applied
6. Ignition/Vehicle » Off — For greater than 5 min
7. Verify DTC C055F is not set.
⇒ If the DTC is not set
All OK.
⇓ If the DTC sets
8. Perform the scan tool control function: Brake Master Cylinder Pressure Test
⇒ If the procedure/test passes
8.1. Ignition/Vehicle » Off — For greater than 5 min
8.2. Fill the brake fluid reservoir to the full level indicator.

om
8.3. Ignition/Vehicle » On — For greater than 30 s — Brake Pedal Not Applied
8.4. Ignition/Vehicle » Off — For greater than 5 min
8.5. Verify DTC C055F is not set.
⇒ If the DTC sets .c
Replace the component: A104 Brake Master Cylinder
gn
⇓ If the DTC is not set
8.6. All OK.
⇓ If the procedure/test does not pass
ia

9. Bleed the brake system. Refer to: Hydraulic Brake System Bleeding
10. Perform the scan tool control function: Brake Hydraulics Test
rd

⇒ If the procedure/test does not pass

11. Replace the component: A104 Brake Master Cylinder
ca

⇓ If the procedure/test passes

12. Ignition/Vehicle » Off — For greater than 5 min
13. Fill the brake fluid reservoir to the full level indicator.
14. Ignition/Vehicle » On — For greater than 30 s — Brake Pedal Not Applied
15. Ignition/Vehicle » Off — For greater than 5 min
16. Verify DTC C055F is not set.
⇒ If the DTC sets
Replace the component: A104 Brake Master Cylinder
⇓ If the DTC is not set
17. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
Verification

For control module replacement, programming, and setup refer to: Control Module References
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4/26/23, 11:14 AM DTC C055F

om
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4/26/23, 11:14 AM DTC C057F

2022 Buick Encore GX | | Brakes | Hydraulic Brakes |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5152644

DTC C057F
Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C057F Brake System Plunger Motor Phase U-V-W Circuit

Symptom Byte Information: Symptom Byte List

Circuit/System Description

om
For an overview of the component/system, refer to: Hydraulic Brake System Description and
Operation

Conditions for Running the DTC

Ignition/Vehicle = ON
.c
gn
Conditions for Setting the DTC

A104 Brake Master Cylinder = Internal Malfunction

ia

Actions Taken When the DTC Sets

ABS Warning Indicator = ON

rd

Traction/Stability Control Indicator = ON

Service Brake Assist = ON
ca

DTCs listed in the DTC Descriptor Category = Type A DTC

Conditions for Clearing the DTC

DTCs listed in the DTC Descriptor Category = Type A DTC

Reference Information
Schematic Reference

Hydraulic Brake Schematics

Connector End View Reference

Master Electrical Component List

Electrical Information Reference

Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs © 2023 General Motors. All rights reserved.

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4/26/23, 11:14 AM DTC C057F

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

1. Ignition » On / Vehicle » In Service Mode

2. Verify DTC C057F is not set.
⇒ If the DTC is set
Replace the component: A104 Brake Master Cylinder
⇓ If the DTC is not set
3. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
Verification

For control module replacement, programming, and setup refer to: Control Module References

om
.c
gn
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ca

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4/26/23, 11:08 AM DTC C060B

2022 Buick Encore GX | | Brakes | Park Brake |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5096810

DTC C060B
Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C060B Left Park Brake Actuator Circuit

Symptom Byte Information: Symptom Byte List

Diagnostic Fault Information

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Short to Open/High Short to Signal
Circuit Ground Resistance Voltage Performance

Control — Terminal 12 @ K160

Brake System Control Module
.c C060B 00
C060B 03
C060B 05
C060B 00
C060B 05
C060B 39
C060B 58
gn
Control — Terminal 13 @ K160 C060B 00 C060B 00 C060B 39
C060B 05
Brake System Control Module C060B 03 C060B 05 C060B 58
ia

Circuit/System Description
rd

For an overview of the component/system, refer to: Electronic Parking Brake Description

Circuit Description
ca

The output circuit is switched from ground to 12 V to

Control — Terminal 12
activate the component.

The output circuit is switched from ground to 12 V to

Control — Terminal 13
activate the component.

Component Description

The park brake function uses the same brake pads as

M104L Park Brake Actuator - Left the operational brake. An electric motor is used to
apply and release the brake pads.

K160 Brake System Control Module The control module K160 can increase and decrease
the brake pressure on all 4 wheels individually in order
to fulfill these functions:

Antilock
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All rights reserved.

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4/26/23, 11:08 AM DTC C060B

Component Description

Traction Control
Vehicle Stability Control

The control module K160 can also influence the

following control modules to limit the amount of
produced torque:

K20 Engine Control Module

K71 Transmission Control Module

Conditions for Running the DTC

Ignition = On
System Voltage = 9 to 16 V

Conditions for Setting the DTC

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M104L Park Brake Actuator - Left = Malfunction
Left Park Brake Actuator Circuit = Malfunction

Actions Taken When the DTC Sets

.c
Parking Brake Actuator = Disabled
The park brake can be released one single time.
gn
A message and/or warning indicator may be displayed to the driver.

Conditions for Clearing the DTC

ia

The conditions for setting the DTC no longer exist.

A history DTC will clear after 40 consecutive malfunction-free ignition cycles.
rd

Diagnostic Aids

The park brake is disabled as long as the DTC is set. It might be necessary to clear the DTC with a
ca

scan tool after repairing the fault to make the park brake work again.

Reference Information
Schematic Reference

Park Brake System Schematics

Connector End View Reference

Master Electrical Component List

Electrical Information Reference

Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs

Scan Tool Reference

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4/26/23, 11:08 AM DTC C060B

Control Module References

Circuit/System Verification

1. Ignition » On / Vehicle » In Service Mode

2. Operate the component: S91 Park Brake Control Switch
Verify the scan tool parameter: Left Park Brake Actuator Status = Applied
⇒ If not the specified state
Refer to: Circuit/System Testing
⇓ If the specified state
3. Operate the component: S91 Park Brake Control Switch
Verify the scan tool parameter: Left Park Brake Actuator Status = Released
⇒ If not the specified state
Refer to: Circuit/System Testing
⇓ If the specified state
4. All OK.

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Circuit/System Testing

Note: The park brake is disabled as long as the DTC is set. It might be necessary to clear the DTC
with a scan tool after repairing the fault to make the park brake work again.

C060B 00, 03, 05

1. Ignition/Vehicle » Off
.c
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2. Disconnect the electrical connector: M104L Park Brake Actuator - Left & K160 Brake System
Control Module
3. Ignition » On / Vehicle » In Service Mode
ia

4. Test for less than 1 V between the test points:

Terminal 12 @ K160 Brake System Control Module & Ground
rd

Terminal 13 @ K160 Brake System Control Module & Ground

⇒ If 1 V or greater
Repair the short to voltage on the circuit.
ca

⇓ If less than 1 V
5. Ignition/Vehicle » Off
6. Test for infinite resistance between the test points:
Terminal 12 @ K160 Brake System Control Module & Ground
Terminal 13 @ K160 Brake System Control Module & Ground
⇒ If less than infinite resistance » Repair the short to ground on the circuit.
⇓ If infinite resistance
7. Test for less than 2 Ω between the test points: Terminal 1 @ Harness Connector - M104L Park
Brake Actuator - Left & Terminal 13 @ Harness Connector - K160 Brake System Control Module
⇒ If 2 Ω or greater » Repair the open/high resistance in the circuit.
⇓ If less than 2 Ω
8. Test for less than 2 Ω between the test points: Terminal 2 @ Harness Connector - M104L Park
Brake Actuator - Left & Terminal 12 @ Harness Connector - K160 Brake System Control Module
⇒ If 2 Ω or greater » Repair the open/high resistance in the circuit.
⇓ If less than 2 Ω © 2023 General Motors. All rights reserved.

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4/26/23, 11:08 AM DTC C060B

9. Connect a 25 A fused jumper wire between the test points: Control terminal 1 or Control
terminal 2 & 12 V
Caution: Complete the testing as quickly as possible in order to prevent overheating and
damaging the component.
10. Momentarily connect a jumper wire between the test points: Control terminal 2 or Control
terminal 1 & Ground
Reverse the jumper wires 2 times between the terminals.
Verify the component works as specified: M104L Park Brake Actuator - Left = Apply & Release
⇒ If not the specified state
Replace the component: M104L Park Brake Actuator - Left
⇓ If the specified state
11. Replace the component: K160 Brake System Control Module

C060B 39

1. Ignition » On / Vehicle » In Service Mode

2. Verify DTC C060B 39 is not set.
⇒ If the DTC is set

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2.1. Perform the following learn procedure: Park Brake Calibration.
2.2. Ignition » On / Vehicle » In Service Mode
2.3. Apply the parking brake.
.c
2.4. Release the parking brake.
2.5. Verify the DTC does not set.
gn
⇒ If the DTC sets » Replace the component: M104L Park Brake Actuator - Left
⇓ If the DTC is not set
2.6. All OK.
ia

⇓ If the DTC is not set

3. All OK.
rd

C060B 58

1. Ignition » On / Vehicle » In Service Mode

ca

2. Verify DTC C060B 58 is not set.

⇒ If the DTC is set
Replace the component: K160 Brake System Control Module
⇓ If the DTC is not set
3. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
Verification

For control module replacement, programming, and setup refer to: Control Module References

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4/26/23, 10:50 AM DTC C0061-C0063 or C0551

2022 Buick Encore GX | | Brakes | Antilock Brake System |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5064733

DTC C0061-C0063 or C0551

Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C0061 Lateral Acceleration Sensor Circuit

DTC C0063 Yaw Rate Circuit

DTC C0551 Longitudinal Acceleration Sensor Circuit

om
Symptom Byte Information: Symptom Byte List

Circuit/System Description

.c
For an overview of the component/system, refer to: ABS Description and Operation
gn
Component Description

The yaw rate, lateral and longitudinal acceleration

B119 Multi-axis Acceleration Sensor sensors are internal to the inflatable restraint sensing
ia

and diagnostic module.

rd

When ABS, traction control or stability control

K160 Brake System Control Module operation is required, the electronic brake control
module activates the pump motor.
ca

Conditions for Running the DTC

Ignition/Vehicle = ON

Conditions for Setting the DTC

C0061 1A

Lateral Acceleration Signal = Out Of Range

C0061 5A

Lateral Acceleration Signal = Not Plausible

C0061 0F

Lateral Acceleration Signal = Signal Erratic

C0061 19

Lateral Acceleration Signal = High Signal Amplitude

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4/26/23, 10:50 AM DTC C0061-C0063 or C0551

C0063 1A

Yaw Rate Circuit = Out Of Range

C0063 5A

Yaw Rate Circuit = Not Plausible

C0063 0F

Yaw Rate Circuit = Signal Erratic

C0063 19

Yaw Rate Circuit = High Signal Amplitude

C0551 1A

Longitudinal Acceleration Sensor Circuit = Out Of Range

C0551 5A

Longitudinal Acceleration Sensor Circuit = Not Plausible

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C0551 0F

Longitudinal Acceleration Sensor Circuit = Signal Erratic

C0551 19 .c
Longitudinal Acceleration Sensor Circuit = High Signal Amplitude
gn
Actions Taken When the DTC Sets
C0061 or C0063
ia

Traction/Stability Control Indicator = ON

A message and/or warning indicator may be displayed to the driver.
rd

C0551

Traction/Stability Control Indicator = ON

ca

Hill Descent Control = ON

Park Brake Indicator = ON
A message and/or warning indicator may be displayed to the driver.
Brake Assist = Limited

Conditions for Clearing the DTC

The conditions for setting the DTC no longer exist.

A history DTC will clear after 40 consecutive malfunction-free ignition cycles.

Reference Information
Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

Master Electrical Component List

Electrical Information© 2023 General Motors. All rights reserved.

Reference

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4/26/23, 10:50 AM DTC C0061-C0063 or C0551

Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs

Scan Tool Reference

Control Module References

Circuit/System Verification

1. Verify DTC C0061, C0063, C0551 is not set. @ K36 Inflatable Restraint Sensing and Diagnostic
Module
⇒ If set as a current DTC @ K36 Inflatable Restraint Sensing and Diagnostic Module
Perform the following learn procedure: Vehicle Dynamic Sensor Offset Calibration
⇓ If set as a history DTC @ K36 Inflatable Restraint Sensing and Diagnostic Module
2. Verify DTC C0061, C0063, C0551 is not set. @ K160 Brake System Control Module
⇒ If set as a current DTC @ K160 Brake System Control Module

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Replace the component: K36 Restraints Control Module
⇓ If the DTC is set as history @ K160 Brake System Control Module
3. Clear DTCs Under normal operating conditions: Verify the DTC does not set.
⇒ If the DTC sets » Replace the component: that set the DTC
⇓ If the DTC is not set
4. All OK.
.c
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Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
ia

Verification

For control module replacement, programming, and setup refer to: Control Module References
rd
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4/26/23, 10:37 AM DTC C0072

2022 Buick Encore GX | | Brakes | Disc Brakes |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5051307

DTC C0072
Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C0072 Brake System Temperature Too High

Symptom Byte Information: Symptom Byte List

Circuit/System Description

om
For an overview of the component/system, refer to: ABS Description and Operation

Conditions for Running the DTC

Ignition » On / Vehicle » In Service Mode

Conditions for Setting the DTC

.c
gn
If the temperature is greater than a predetermined value.

Actions Taken When the DTC Sets

ia

Traction/Stability Control Indicator = ON

Conditions for Clearing the DTC

rd

The conditions for setting the DTC no longer exist.

ca

A history DTC will clear after 40 consecutive malfunction-free ignition cycles.

Diagnostic Aids

This DTC does not indicate any system malfunction.

DTC C0072 indicates there was excessive system activation in the following system(s) that
caused the high temperature:
– Antilock Braking System
– Traction Control System
– Vehicle Stability Control

Reference Information
Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

Master Electrical Component List

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4/26/23, 10:37 AM DTC C0072

Electrical Information Reference

Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs

Scan Tool Reference

Control Module References

Circuit/System Verification

1. Discuss with the customer about the driving conditions when the concern occurred.
2. Verify no other DTCs are set.
⇒ If any other DTCs are set
Refer to: Diagnostic Trouble Code (DTC) List - Vehicle
⇓ If no other DTCs are set
3. Under normal operating conditions: Verify DTC C0072 is not set.

om
⇒ If the DTC sets
Replace the component: K160 Brake System Control Module
⇓ If the DTC is not set
4. All OK.

Repair Instructions
.c
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Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
Verification
ia

For control module replacement, programming, and setup refer to: Control Module References
rd
ca

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4/26/23, 10:37 AM DTC C116B

2022 Buick Encore GX | | Brakes | Disc Brakes |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5523508

DTC C116B
Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C116B Rear Brake Pad Wear Signal Circuit

Symptom Byte Information: Symptom Byte List

Diagnostic Fault Information

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Short to Open/High Short to Signal
Circuit Ground Resistance Voltage Performance

Signal
.c C116B C116B 05 C116B 05
C116B 55,
56, 59, 5A,
71
gn
Low Reference — C116B 05 — —
ia

Circuit/System Description

For an overview of the component/system, refer to: Brake Pad Life Monitoring Description and
rd

Operation
ca

Circuit Description

The control module input circuit has an internal

Signal
resistance connected to 12 V.

Ground circuit Chassis Ground

Conditions for Running the DTC

Ignition » On / Vehicle » In Service Mode

Battery Voltage = Greater than 9 V & Less than 16 V

Conditions for Setting the DTC

C116B 05, 55, 56, 59, 5A

Signal circuit = Voltage Out of Range

Ground circuit = Open

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4/26/23, 10:37 AM DTC C116B

Rear Disc Brake Pad Wear Sensor = Worn

C116B 71

The control module receives no or invalid data from a sensor.

Actions Taken When the DTC Sets

A message and/or warning indicator may be displayed to the driver.

Conditions for Clearing the DTC

A current DTC will clear when the diagnostic runs and passes.

Reference Information
Schematic Reference

Disc Brake Schematics

Connector End View Reference

Master Electrical Component List

om
Electrical Information Reference

Circuit Testing
Connector Repairs
.c
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs
gn
Scan Tool Reference

Control Module References

ia

Circuit/System Verification

1. Verify no other DTCs are set.

rd

⇒ If other DTCs are set

Refer to: Diagnostic Trouble Code (DTC) List - Vehicle
ca

⇓ If no other DTCs are set

Refer to: Circuit/System Testing

Circuit/System Testing

Note: It may take up to 2 min for all vehicle systems to power down before an accurate
ground or low reference circuit continuity test can be performed.
1. Ignition/Vehicle & All vehicle systems » Off
2. Disconnect the electrical connector: B172RR Brake Pad Wear Sensor - Right Rear
3. Test for less than 10 Ω between the test points: Ground circuit terminal 2 & Ground
⇒ If 10 Ω or greater
3.1. Test for less than 2 Ω between the test points: Ground circuit terminal 2 @ Component
harness & The other end of the circuit
⇒ If 2 Ω or greater » Repair the open/high resistance in the circuit.
⇒ If less than 2 Ω » Repair the open/high resistance in the ground connection.
⇓ If less than 10 Ω
4. Ignition/Vehicle » Off© 2023 General Motors. All rights reserved.

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4/26/23, 10:37 AM DTC C116B

5. Disconnect the electrical connector: @ K160 Brake System Control Module

6. Test for infinite resistance between the test points: Signal circuit terminal 1 @ Component
harness & Ground
⇒ If less than infinite resistance
Repair the short to ground on the circuit
⇓ If infinite resistance
7. Ignition » On / Vehicle » In Service Mode
8. Test for less than 1 V between the test points: Signal circuit terminal 1 @ Component harness
& Ground
⇒ If 1 V or greater
Repair the short to voltage on the circuit.
⇓ If less than 1 V
9. Ignition/Vehicle » Off
10. Test for less than 2 Ω between the test points: Signal circuit terminal 1 @ Component harness
& Terminal X1 40 @ Control module harness
⇒ If 2 Ω or greater

om
Repair the open/high resistance in the circuit
⇓ If less than 2 Ω
11. Replace the component: B172RR Brake Pad Wear Sensor - Right Rear
12. Verify DTC C116B is not set.
⇒ If the DTC sets
.c
Replace the component: K160 Brake System Control Module
gn
⇓ If the DTC does not set
13. All OK.
ia

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
rd

Verification

Rear Disc Brake Pad Wear Sensor Replacement

ca

For control module replacement, programming, and setup refer to: Control Module
References

© 2023 General Motors. All rights reserved.

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4/26/23, 10:38 AM DTC C116C

2022 Buick Encore GX | | Brakes | Disc Brakes |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5523534

DTC C116C
Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C116C Front Brake Pad Wear Signal Circuit

Symptom Byte Information: Symptom Byte List

Diagnostic Fault Information

om
Short to Open/High Short to Signal
Circuit Ground Resistance Voltage Performance

Signal
.c C116C C116C 05 C116C 05
C116B 55,
56, 59, 5A,
71
gn
Low Reference — C116C 05 — —
ia

Circuit/System Description

For an overview of the component/system, refer to: Brake Pad Life Monitoring Description and
rd

Operation
ca

Circuit Description

The control module input circuit has an internal

Signal
resistance connected to 12 V.

Ground circuit Chassis Ground

Conditions for Running the DTC

Ignition » On / Vehicle » In Service Mode

Battery Voltage = Greater than 9 V & Less than 16 V

Conditions for Setting the DTC

C116C 05, 55, 56, 59, 5A

Signal circuit = Voltage Out of Range

Ground circuit = Open

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4/26/23, 10:38 AM DTC C116C

Front Disc Brake Pad Wear Sensor = Worn

C116C 71

The control module receives no or invalid data from a sensor.

Actions Taken When the DTC Sets

A message and/or warning indicator may be displayed to the driver.

Conditions for Clearing the DTC

A current DTC will clear when the diagnostic runs and passes.

Reference Information
Schematic Reference

Disc Brake Schematics

Connector End View Reference

Master Electrical Component List

om
Electrical Information Reference

Circuit Testing
Connector Repairs
.c
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs
gn
Scan Tool Reference

Control Module References

ia

Circuit/System Verification

1. Verify no other DTCs are set.

rd

⇒ If other DTCs are set

Refer to: Diagnostic Trouble Code (DTC) List - Vehicle
ca

⇓ If no other DTCs are set

Refer to: Circuit/System Testing

Circuit/System Testing

Note: It may take up to 2 min for all vehicle systems to power down before an accurate
ground or low reference circuit continuity test can be performed.
1. Ignition/Vehicle & All vehicle systems » Off
2. Disconnect the electrical connector: B172LF Brake Pad Wear Sensor - Left Front
3. Test for less than 10 Ω between the test points: Ground circuit terminal 2 & Ground
⇒ If 10 Ω or greater
3.1. Test for less than 2 Ω between the test points: Ground circuit terminal 2 @ Component
harness & The other end of the circuit
⇒ If 2 Ω or greater » Repair the open/high resistance in the circuit.
⇒ If less than 2 Ω » Repair the open/high resistance in the ground connection.
⇓ If less than 10 Ω
4. Ignition/Vehicle » Off© 2023 General Motors. All rights reserved.

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4/26/23, 10:38 AM DTC C116C

5. Disconnect the electrical connector: @ K160 Brake System Control Module

6. Test for infinite resistance between the test points: Signal circuit terminal 1 @ Component
harness & Ground
⇒ If less than infinite resistance
Repair the short to ground on the circuit
⇓ If infinite resistance
7. Ignition » On / Vehicle » In Service Mode
8. Test for less than 1 V between the test points: Signal circuit terminal 1 @ Component harness
& Ground
⇒ If 1 V or greater
Repair the short to voltage on the circuit.
⇓ If less than 1 V
9. Ignition/Vehicle » Off
10. Test for less than 2 Ω between the test points: Signal circuit terminal 1 @ Component harness
& Terminal X1 35 @ Control module harness
⇒ If 2 Ω or greater

om
Repair the open/high resistance in the circuit
⇓ If less than 2 Ω
11. Replace the component: B172LF Brake Pad Wear Sensor - Left Front
12. Verify DTC C116C is not set.
⇒ If the DTC sets
.c
Replace the component: K160 Brake System Control Module
gn
⇓ If the DTC does not set
13. All OK.
ia

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
rd

Verification

Front Disc Brake Pad Wear Sensor Replacement

ca

For control module replacement, programming, and setup refer to: Control Module
References

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4/26/23, 10:56 AM DTC C124F or C1250-C1254

2022 Buick Encore GX | | Brakes | Antilock Brake System |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5083277

DTC C124F or C1250-C1254

Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C124F Lateral Acceleration Sensor Circuit Low Voltage

DTC C1250 Lateral Acceleration Sensor Circuit High Voltage

DTC C1251 Lateral Acceleration Sensor Performance

om
DTC C1252 Longitudinal Acceleration Sensor Circuit Low Voltage

DTC C1253 Longitudinal Acceleration Sensor Circuit High Voltage

.c
DTC C1254 Longitudinal Acceleration Sensor Performance

Symptom Byte Information: Symptom Byte List

gn
Circuit/System Description

For an overview of the component/system, refer to: ABS Description and Operation
ia

Conditions for Running the DTC

The vehicle speed is greater than 16 km/h (10 MPH).

rd

Conditions for Setting the DTC

ca

Fault = Detected @ Transmission Control Module

Actions Taken When the DTC Sets

Air Bag Malfunction Indicator = ON

Traction/Stability Control Indicator = ON
The EBCM disables the ABS, traction control, stability control and hill start assist for the
duration of the ignition cycle.

Conditions for Clearing the DTC

The conditions for setting the DTC no longer exist.

A history DTC will clear after 40 consecutive malfunction-free ignition cycles.

Reference Information
Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

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4/26/23, 10:56 AM DTC C124F or C1250-C1254

Master Electrical Component List

Electrical Information Reference

Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs

Scan Tool Reference

Control Module References

Circuit/System Verification

1. Ignition » On / Vehicle » In Service Mode

2. Verify no other DTCs are set.
⇒ If any other DTCs are set
Refer to: Diagnostic Trouble Code (DTC) List - Vehicle

om
⇓ If no other DTCs are set
3. Replace the component: K36 Inflatable Restraint Sensing and Diagnostic Module
4. Under normal operating conditions: Verify that no DTCs are set.
⇒ If the DTC sets
.c
Replace the component for which the DTC was set.
⇓ If the DTC is not set
gn
5. All OK.

Repair Instructions
ia

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
Verification
rd

For control module replacement, programming, and setup refer to: Control Module References
ca

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4/26/23, 10:57 AM DTC C127E

2022 Buick Encore GX | | Brakes | Antilock Brake System |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5083795

DTC C127E
Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C127E Control Module Overtemperature

Symptom Byte Information: Symptom Byte List

Circuit/System Description

om
For an overview of the component/system, refer to: ABS Description and Operation

Conditions for Running the DTC

.c
Ignition » On / Vehicle » In Service Mode

Conditions for Setting the DTC

gn
Module Temperature Status = Overtemperature

Actions Taken When the DTC Sets

ia

ABS Indicator Control = ON

Traction/Stability Control Indicator = ON
rd

A message and/or warning indicator may be displayed to the driver.

Conditions for Clearing the DTC

ca

The conditions for setting the DTC no longer exist.

A history DTC will clear after 40 consecutive malfunction-free ignition cycles.

Reference Information
Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

Master Electrical Component List

Electrical Information Reference

Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs
© 2023 General Motors. All rights reserved.

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4/26/23, 10:57 AM DTC C127E

Scan Tool Reference

Control Module References

Circuit/System Verification

1. Verify no other DTCs are set.

⇒ If any other DTCs are set
Refer to: Diagnostic Trouble Code (DTC) List - Vehicle
⇓ If no other DTCs are set
2. Control Module = Ambient Air Temperature.
3. Under normal operating conditions: Verify DTC C127E is not set.
⇒ If the DTC sets
Replace the component: K160 Brake System Control Module
⇓ If the DTC is not set
4. All OK.

Repair Instructions

om
Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
Verification

For control module replacement, programming, and setup refer to: Control Module References
.c
gn
ia
rd
ca

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4/26/23, 10:50 AM DTC C0186, C0187, C018A, C018B, C0196, C019A, C019B, C027E, C027F, or C0287

2022 Buick Encore GX | | Brakes | Antilock Brake System |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5083352

DTC C0186, C0187, C018A, C018B, C0196, C019A, C019B,

C027E, C027F, or C0287
Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C0186 Lateral Acceleration Sensor Signal

DTC C018A Lateral Acceleration Sensor 2 Signal

om
DTC C018B Lateral Acceleration Sensor Signal

DTC C0196 Yaw Rate Signal

DTC C019A Yaw Rate 2 Signal

DTC C019B Yaw Rate Signal

.c
gn
DTC C027E Longitudinal Acceleration Sensor Signal

DTC C027F Longitudinal Acceleration Signals 1-2 Not Plausible

ia

DTC C0287 Longitudinal Acceleration Sensor Signal

Symptom Byte Information: Symptom Byte List

rd

Circuit/System Description
ca

For an overview of the component/system, refer to: ABS Description and Operation

Component Description

The yaw rate, lateral and longitudinal acceleration

B119 Multi-axis Acceleration Sensor sensors are internal to the inflatable restraint sensing
and diagnostic module.

When ABS, traction control or stability control

K160 Brake System Control Module operation is required, the electronic brake control
module activates the pump motor.

Conditions for Running the DTC

Ignition » On / Vehicle » In Service Mode & The vehicle speed is greater than 16 km/h (10 MPH).

Conditions for Setting the DTC

C0186, C018A, C018B

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4/26/23, 10:50 AM DTC C0186, C0187, C018A, C018B, C0196, C019A, C019B, C027E, C027F, or C0287

Lateral Acceleration Signal = Malfunction

C0196, C019A, C019B

Yaw Rate Signal = Malfunction

C027E, C027F, C0287

Longitudinal Acceleration Sensor Signal = Malfunction

Actions Taken When the DTC Sets

Traction/Stability Control Indicator = ON

The EBCM disables the ABS, traction control, stability control and hill start assist for the
duration of the ignition cycle.
Driver Information Display — Service Stability Control

Conditions for Clearing the DTC

The conditions for setting the DTC no longer exist.

A history DTC will clear after 40 consecutive malfunction-free ignition cycles.

om
Diagnostic Aids

Verify the condition did not cause the DTC to set: The brake and the accelerator pedals are
pressed simultaneously for greater than 2 s.

Reference Information
Schematic Reference
.c
gn
Antilock Brake System Schematics

Connector End View Reference

ia

Master Electrical Component List

rd

Electrical Information Reference

Circuit Testing
ca

Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs

Scan Tool Reference

Control Module References

Circuit/System Verification

1. Verify DTC B101D is not set. @ K36 Inflatable Restraint Sensing and Diagnostic Module
⇒ If DTC B101D is set
Replace the component: K36 Inflatable Restraint Sensing and Diagnostic Module
⇓ If the DTC is not set
2. Verify DTC C0186, C0187, C018A, C018B, C0196, C019A, C019B, C027E, C027F, C0287 is not
set. @ K36 Inflatable Restraint Sensing and Diagnostic Module
⇒ If any of the DTCs are set
Perform the following learn procedure: Vehicle Dynamic Sensor Offset Calibration
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4/26/23, 10:50 AM DTC C0186, C0187, C018A, C018B, C0196, C019A, C019B, C027E, C027F, or C0287

⇓ If the DTC is not set

3. Verify DTC C0186, C0187, C018A, C018B, C0196, C019A, C019B, C027E, C027F, C0287 is not
set. @ K160 Brake System Control Module
⇒ If any of the DTCs are set
3.1. Replace the component: K36 Inflatable Restraint Sensing and Diagnostic Module
3.2. Under normal operating conditions: Verify the DTC does not set.
⇒ If the DTC sets » Replace the component: K160 Brake System Control Module
⇓ If the DTC is not set
3.3. All OK.
⇓ If none of the DTCs are set
4. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
Verification

om
For control module replacement, programming, and setup refer to: Control Module References

.c
gn
ia
rd
ca

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4/26/23, 10:51 AM DTC C0500-C0504, C0506-C0510, C0512-C0516, C050A, or C050C-C050F

2022 Buick Encore GX | | Brakes | Antilock Brake System |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5051322

DTC C0500-C0504, C0506-C0510, C0512-C0516, C050A,

or C050C-C050F
Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C0500 Left Front Wheel Speed Sensor Circuit

DTC C0501 Left Front Wheel Speed Sensor Circuit Performance

om
DTC C0502 Left Front Wheel Speed Sensor Circuit Low Input

DTC C0503 Left Front Wheel Speed Sensor Circuit High Input

.c
DTC C0504 Left Front Wheel Speed Sensor Circuit Erratic

DTC C0506 Right Front Wheel Speed Sensor Circuit

gn
DTC C0507 Right Front Wheel Speed Sensor Circuit Performance

DTC C0508 Right Front Wheel Speed Sensor Circuit Low Input
ia

DTC C0509 Right Front Wheel Speed Sensor Circuit High Input

DTC C0510 Left Rear Wheel Speed Sensor Circuit Erratic

rd

DTC C050A Right Front Wheel Speed Sensor Circuit Erratic

ca

DTC C050C Left Rear Wheel Speed Sensor Circuit

DTC C050D Left Rear Wheel Speed Sensor Circuit Performance

DTC C050E Left Rear Wheel Speed Sensor Circuit Low Input

DTC C050F Left Rear Wheel Speed Sensor Circuit High Input

DTC C0512 Right Rear Wheel Speed Sensor Circuit

DTC C0513 Right Rear Wheel Speed Sensor Circuit Performance

DTC C0514 Right Rear Wheel Speed Sensor Circuit Low Input

DTC C0515 Right Rear Wheel Speed Sensor Circuit High Input

DTC C0516 Right Rear Wheel Speed Sensor Circuit Erratic

Symptom Byte Information: Symptom Byte List

Diagnostic Fault Information

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4/26/23, 10:51 AM DTC C0500-C0504, C0506-C0510, C0512-C0516, C050A, or C050C-C050F

Short to Open/High Short to Signal

Circuit Ground Resistance Voltage Performance

Control — Terminal 1 @ B5LF Wheel C0501,

C0502 C0500 C0503
Speed Sensor - Left Front C0504

Signal — Terminal 2 @ B5LF Wheel C0501,

C0500 C0500 C0503
Speed Sensor - Left Front C0504

Control — Terminal 1 @ B5RF C0507,

C0508 C0506 C0509
Wheel Speed Sensor - Right Front C050A

Signal — Terminal 2 @ B5RF Wheel C0507,

C0506 C0506 C0509
Speed Sensor - Right Front C050A

Control — Terminal 1 @ B5LR C050D,

C050E C050C C050F
Wheel Speed Sensor - Left Rear C0510

om
Signal — Terminal 2 @ B5LR Wheel C050D,
C050C C050C C050F
Speed Sensor - Left Rear C0510

Control — Terminal 1 @ B5RR C0513,

C0514 C0512 C0515
Wheel Speed Sensor - Right Rear C0516

Signal — Terminal 2 @ B5RR Wheel

.c C0512 C0512 C0515
C0513,
gn
Speed Sensor - Right Rear C0516

Circuit/System Description
ia

For an overview of the component/system, refer to: ABS Description and Operation
rd

Circuit Description

Control The sensor produces a frequency modulated signal.

ca

Signal Grounded through the control module.

Component Description

The sensor contains a hall-effect sensor and

additional electronics that processes the signal. It
detects the change of strength of the magnetic field
caused by the reluctor ring. When the strength
B5 Wheel Speed Sensor changes, the sensor changes the amount of current it
consumes. This results in a square wave signal of
current and voltage. The control module detects the
frequency in which the signal changes, which is
proportional to the rotational speed.

The control module K160 uses the input signal from

K160 Brake System Control Module
the sensor B5 to determine the wheel speed.
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4/26/23, 10:51 AM DTC C0500-C0504, C0506-C0510, C0512-C0516, C050A, or C050C-C050F

Conditions for Running the DTC

C0500, C0502, C0503, C0506, C0508, C0509, C0510, C050C, C050F, C0512, C0514,
C0515

Ignition On

C0501, C0504, C0507, C050A, C050D, C050E, C0513, C0516

The vehicle speed is greater than 60 km/h (37 MPH).

Conditions for Setting the DTC

C0500, C0506, C050C, C0512

Signal circuit = open

Control Circuit = open

C0503, C0509, C050F, C0515

Control Circuit = Short to Voltage

om
C0502, C0508, C050E, C0514

Control Circuit = Short to Ground

C0504, C050A, C0510, C0516

Wheel Speed Sensor = Erratic

.c
gn
C0501, C0507, C050D, C0513

Debris on the component.

Incorrect installation of a component:
ia

B5 Wheel Speed Sensor = Incorrect air gap

Electromagnetic Interference
rd

The reluctor ring has missing teeth, magnetic segments, or indentations for a reference gap.

Actions Taken When the DTC Sets

ca

ABS Indicator Control = ON

Traction/Stability Control Indicator = ON
A message and/or warning indicator may be displayed to the driver.

Conditions for Clearing the DTC

The conditions for setting the DTC no longer exist.

A history DTC will clear after 40 consecutive malfunction-free ignition cycles.

Diagnostic Aids

Inspect the component for wear or damage: B5 Wheel Speed Sensor .

Do NOT use a magnet to clean the component: Encoder Ring .
Inspect the following components: B5 Wheel Speed Sensor = Correct part .
If the customer comments that the ABS indicator is ON only during moist environmental
conditions (rain, snow, vehicle washed), inspect the wheel speed sensor wiring for signs of
water intrusion.
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4/26/23, 10:51 AM DTC C0500-C0504, C0506-C0510, C0512-C0516, C050A, or C050C-C050F

Reference Information
Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

Master Electrical Component List

Electrical Information Reference

Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs

Scan Tool Reference

Control Module References

Circuit/System Verification

om
1. Test drive the vehicle.
All sensors must show the same speed when driving in a straight line at a speed greater than
40 km/h (25 MPH).

Sensor
.c
2. Verify the following parameters are within 1.6 km/h (1 MPH) of each other: Wheel Speed

⇒ If not within 1.6 km/h (1 MPH) of each other

gn
Refer to: Circuit/System Testing
⇓ If within 1.6 km/h (1 MPH) of each other
ia

3. All OK.

Circuit/System Testing
rd

1. Inspect the following components:

B5 Wheel Speed Sensor ≠ Correct part
ca

B5 Wheel Speed Sensor = Visible Damage

⇒ If a condition exists
Replace the component: B5 Wheel Speed Sensor
⇓ If no conditions exist
2. Ignition/Vehicle & All vehicle systems » Off
3. Disconnect the electrical connector: K160 Brake System Control Module & B5 Wheel Speed
Sensor
4. Test for less than 1 V between the test points:
Control circuit terminal 1 @ B5 Wheel Speed Sensor & Ground
Signal circuit terminal 2 @ B5 Wheel Speed Sensor & Ground
⇒ If 1 V or greater
Repair the short to voltage on the circuit.
⇓ If less than 1 V
5. Test for infinite resistance between the test points:
Control circuit terminal 1 @ B5 Wheel Speed Sensor & Ground
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4/26/23, 10:51 AM DTC C0500-C0504, C0506-C0510, C0512-C0516, C050A, or C050C-C050F

Signal circuit terminal 2 @ B5 Wheel Speed Sensor & Ground

⇒ If less than infinite resistance
Repair the short to ground on the circuit.
⇓ If infinite resistance
6. Test for less than 2 Ω between the test points: Control circuit terminal 1 @ B5 Wheel Speed
Sensor & The other end of the circuit @ Control module harness
⇒ If 2 Ω or greater
Repair the open/high resistance in the circuit.
⇓ If less than 2 Ω
7. Test for less than 2 Ω between the test points: Signal circuit terminal 2 @ B5 Wheel Speed
Sensor & The other end of the circuit @ Control module harness
⇒ If 2 Ω or greater
Repair the open/high resistance in the circuit.
⇓ If less than 2 Ω
8. Replace the component: B5 Wheel Speed Sensor
9. Verify the DTC does not set.

om
⇒ If the DTC sets
Replace the component: K160 Brake System Control Module
⇓ If the DTC does not set
10. All OK.

Repair Instructions
.c
gn
Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
Verification

Front Wheel Speed Sensor Replacement

ia

Rear Wheel Speed Sensor Replacement

For control module replacement, programming, and setup refer to: Control Module
rd

References
ca

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4/26/23, 10:51 AM DTC C0505, C050B, C0511, or C0517

2022 Buick Encore GX | | Brakes | Antilock Brake System |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5144709

DTC C0505, C050B, C0511, or C0517

Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C0505 Left Front Wheel Speed Sensor Correlation

DTC C050B Right Front Wheel Speed Sensor Correlation

DTC C0511 Left Rear Wheel Speed Sensor Correlation

om
DTC C0517 Right Rear Wheel Speed Sensor Correlation

Symptom Byte Information: Symptom Byte List

Circuit/System Description .c
For an overview of the component/system, refer to: ABS Description and Operation
gn
Conditions for Running the DTC

Ignition/Vehicle = ON
ia

Conditions for Setting the DTC

The difference between the following parameters is greater than a predefined value: Wheel Speed
rd

Sensor & Transmission Output Speed — 21 km/h (13 MPH)

Actions Taken When the DTC Sets

ca

DTCs listed in the DTC Descriptor category = Type C DTC

Conditions for Clearing the DTC

DTCs listed in the DTC Descriptor category = Type C DTC

Reference Information
Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

Master Electrical Component List

Electrical Information Reference

Circuit Testing
Connector Repairs
Testing for Intermittent
© 2023 Conditions and PoorAll
General Motors. Connections
rights reserved.

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4/26/23, 10:51 AM DTC C0505, C050B, C0511, or C0517

Wiring Repairs

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References

Circuit/System Verification

1. Verify there are no DTCs set related to the following component/system: Wheel Speed Sensor
& Transmission Control Module
⇒ If any of the DTCs are set
Refer to: Diagnostic Trouble Code (DTC) List - Vehicle
⇓ If none of the DTCs are set
2. Replace the component: K71 Transmission Control Module
3. Verify the DTC does not set.
⇒ If the DTC is set

om
Replace the component: K160 Brake System Control Module
⇓ If the DTC is not set
4. All OK.

Repair Instructions
.c
gn
Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
Verification

For control module replacement, programming, and setup refer to: Control Module References
ia
rd
ca

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4/26/23, 10:52 AM DTC C0555-C0558

2022 Buick Encore GX | | Brakes | Antilock Brake System |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5052418

DTC C0555-C0558
Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C0555 Left Front Wheel Speed Sensor Incorrect Component Installed

DTC C0556 Right Front Wheel Speed Sensor Incorrect Component Installed

DTC C0557 Left Rear Wheel Speed Sensor Incorrect Component Installed

om
DTC C0558 Right Rear Wheel Speed Sensor Incorrect Component Installed

Symptom Byte Information: Symptom Byte List

Circuit/System Description .c
For an overview of the component/system, refer to: ABS Description and Operation
gn
Conditions for Running the DTC

Ignition/Vehicle = ON
ia

Conditions for Setting the DTC

Incorrect installation of a component:

rd

Actions Taken When the DTC Sets

ca

ABS Indicator Control = ON

Traction/Stability Control Indicator = ON
Hill Descent Control = ON
A message and/or warning indicator may be displayed to the driver.
Malfunction Indicator Lamp (MIL) = ON
DTCs listed in the DTC Descriptor category = Type A DTC

Conditions for Clearing the DTC

DTCs listed in the DTC Descriptor category = Type A DTC

Diagnostic Aids

Inspect the component for wear or damage: B5 Wheel Speed Sensor .

Do NOT use a magnet to clean the component: Encoder Ring .
Inspect the following components: B5 Wheel Speed Sensor = Correct part .
If the customer comments that the ABS indicator is ON only during moist environmental
conditions (rain, snow, vehicle washed), inspect the wheel speed sensor wiring for signs of
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4/26/23, 10:52 AM DTC C0555-C0558

water intrusion.

Reference Information
Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

Master Electrical Component List

Electrical Information Reference

Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

om
Scan Tool Reference

Control Module References

Circuit/System Verification .c
1. Ignition » On / Vehicle » In Service Mode
gn
2. Verify no other DTCs are set.
⇒ If any other DTCs are set
Refer to: Diagnostic Trouble Code (DTC) List - Vehicle
ia

⇓ If no other DTCs are set

3. Inspect the following components:
rd

B5 Wheel Speed Sensor ≠ Correct part

B5 Wheel Speed Sensor = Visible Damage
ca

⇒ If a condition exists
Replace the component: B5 Wheel Speed Sensor
⇓ If no conditions exist
4. Replace the component: K160 Brake System Control Module

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
Verification

Front Wheel Speed Sensor Replacement

Rear Wheel Speed Sensor Replacement
For control module replacement, programming, and setup refer to: Control Module
References

© 2023 General Motors. All rights reserved.

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4/26/23, 10:52 AM DTC C0571, C0572, or C0574

2022 Buick Encore GX | | Brakes | Antilock Brake System |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5053431

DTC C0571, C0572, or C0574

Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C0571 Brake Master Cylinder Pressure Sensor 1 Circuit Low Voltage

DTC C0572 Brake Master Cylinder Pressure Sensor 1 Circuit High Voltage

DTC C0574 Brake Master Cylinder Pressure Sensor 1 Circuit Performance

om
Symptom Byte Information: Symptom Byte List

Circuit/System Description

.c
For an overview of the component/system, refer to: ABS Description and Operation

Conditions for Running the DTC

gn
Ignition/Vehicle = ON

Conditions for Setting the DTC

ia

Brake System Control Module Internal Malfunction

Actions Taken When the DTC Sets

rd

ABS Warning Indicator = ON

ca

Traction/Stability Control Indicator = ON

Brake warning indicator malfunction. = ON
Hill Descent Control = ON
Vehicle Speed Limit = Less than 100 km/h (62 MPH)
Malfunction Indicator Lamp (MIL) = ON
DTCs listed in the DTC Descriptor category = Type A DTC

Conditions for Clearing the DTC

DTCs listed in the DTC Descriptor category = Type A DTC

Reference Information
Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

Master Electrical Component List

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4/26/23, 10:52 AM DTC C0571, C0572, or C0574

Electrical Information Reference

Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs

Scan Tool Reference

Control Module References

Circuit/System Verification

1. Ignition/Vehicle » Off = 10 s
2. Ignition » On / Vehicle » In Service Mode
3. Verify DTC C0571,C0572,C0574 is not set.
⇒ If DTC C0571,C0572,C0574 is set
Replace the component: A104 Brake Master Cylinder
⇓ If the DTC is not set

om
4. All OK.

Repair Instructions

.c
Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
Verification
gn
For control module replacement, programming, and setup refer to: Control Module References
ia
rd
ca

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4/26/23, 11:14 AM DTC C0579 or C057A

2022 Buick Encore GX | | Brakes | Hydraulic Brakes |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5081393

DTC C0579 or C057A

Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C0579 Control Module Temperature Sensor 2 Circuit Low Voltage

DTC C057A Control Module Temperature Sensor 2 Circuit High Voltage

Symptom Byte Information: Symptom Byte List

om
Circuit/System Description

For an overview of the component/system, refer to: Hydraulic Brake System Description and
Operation

Conditions for Running the DTC

.c
gn
Ignition/Vehicle = ON

Conditions for Setting the DTC

ia

C0579

Control Module Temperature Sensor 2 = Short to Ground

rd

C057A

Control Module Temperature Sensor 2 = Short to Voltage

ca

Actions Taken When the DTC Sets

Brake System Warning Indicator = OFF

Traction/Stability Control Indicator = OFF

Conditions for Clearing the DTC

The conditions for setting the DTC no longer exist.

Reference Information
Schematic Reference

Hydraulic Brake Schematics

Connector End View Reference

Master Electrical Component List

Electrical Information Reference

Circuit Testing © 2023 General Motors. All rights reserved.

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4/26/23, 11:14 AM DTC C0579 or C057A

Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

1. Ignition » On / Vehicle » In Service Mode

2. Verify DTC C0579, C057A is not set.
⇒ If the DTC is set
2.1. Perform all necessary programming and setup procedures for the control module: K160
Brake System Control Module
2.2. Verify the DTC does not set.
⇒ If the DTC sets » Replace the component: K160 Brake System Control Module
⇓ If the DTC is not set

om
2.3. All OK.
⇓ If the DTC is not set
3. All OK.

Repair Instructions .c
Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
gn
Verification

For control module replacement, programming, and setup refer to: Control Module References
ia
rd
ca

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4/26/23, 11:14 AM DTC C0580, C0582, C0590, C0591, or C0595

2022 Buick Encore GX | | Brakes | Hydraulic Brakes |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5081450

DTC C0580, C0582, C0590, C0591, or C0595

Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C0582 Brake System Plunger Motor Phase U-V-W Circuit Performance

DTC C0590 Brake System Plunger Motor Phase U-V-W Circuit High Current

DTC C0591 Brake System Plunger Motor Phase U-V-W Circuit Low Current

om
DTC C0595 Brake System Control Module Internal Driver Performance

Symptom Byte Information: Symptom Byte List

Circuit/System Description .c
For an overview of the component/system, refer to: Hydraulic Brake System Description and
gn
Operation

Conditions for Running the DTC

ia

Ignition/Vehicle = ON

Conditions for Setting the DTC

rd

K160 Brake System Control Module = Internal Malfunction

Actions Taken When the DTC Sets

ca

ABS Warning Indicator = ON

Traction/Stability Control Indicator = ON
Service Brake Assist = ON
DTCs listed in the DTC Descriptor Category = Type A DTC

Conditions for Clearing the DTC

DTCs listed in the DTC Descriptor Category = Type A DTC

Reference Information
Schematic Reference

Hydraulic Brake Schematics

Connector End View Reference

Master Electrical Component List

Electrical Information Reference

© 2023 General Motors. All rights reserved.

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4/26/23, 11:14 AM DTC C0580, C0582, C0590, C0591, or C0595

Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

1. Ignition » On / Vehicle » In Service Mode

2. Verify DTC P0562 is not set.
⇒ If the DTC is set
Refer to: Diagnostic Trouble Code (DTC) List - Vehicle
⇓ If the DTC is not set
3. Verify DTC C0582, C0590, C0591, C0595 is not set.
⇒ If the DTC is set

om
Replace the component: K160 Brake System Control Module
⇓ If the DTC is not set
4. All OK.

Repair Instructions .c
Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
gn
Verification

For control module replacement, programming, and setup refer to: Control Module References
ia
rd
ca

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4/26/23, 11:14 AM DTC C0588-C058A

2022 Buick Encore GX | | Brakes | Hydraulic Brakes |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5081463

DTC C0588-C058A
Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C0588 Brake System Plunger Motor Position Sensor 1 Circuit Low Voltage

DTC C0589 Brake System Plunger Motor Position Sensor 1 Circuit High Voltage

DTC C058A Brake System Plunger Motor Position Sensor 1 Circuit Performance

om
Symptom Byte Information: Symptom Byte List

Circuit/System Description

.c
For an overview of the component/system, refer to: Hydraulic Brake System Description and
Operation
gn
Conditions for Running the DTC

Ignition/Vehicle = On
ia

Conditions for Setting the DTC

A104 Brake Master Cylinder = Internal Malfunction

rd

Actions Taken When the DTC Sets

ABS Warning Indicator = ON

ca

Traction/Stability Control Indicator = ON

Service Brake Assist = ON

Conditions for Clearing the DTC

The conditions for setting the DTC no longer exist.

Reference Information
Schematic Reference

Hydraulic Brake Schematics

Connector End View Reference

Master Electrical Component List

Electrical Information Reference

Circuit Testing
Connector Repairs
© 2023 General Motors. All rights reserved.

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4/26/23, 11:14 AM DTC C0588-C058A

Testing for Intermittent Conditions and Poor Connections

Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

1. Ignition » On / Vehicle » In Service Mode

2. Verify DTC C0588, C0589, C058A is not set.
⇒ If the DTC is set
Replace the component: A104 Brake Master Cylinder
⇓ If the DTC is not set
3. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
Verification

om
For control module replacement, programming, and setup refer to: Control Module References

.c
gn
ia
rd
ca

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4/26/23, 11:14 AM DTC C0594

2022 Buick Encore GX | | Brakes | Hydraulic Brakes |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5081476

DTC C0594
Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C0594 Brake System Plunger Motor Performance

Symptom Byte Information: Symptom Byte List

Circuit/System Description

om
For an overview of the component/system, refer to: Hydraulic Brake System Description and
Operation

Conditions for Running the DTC

Ignition/Vehicle = ON
.c
gn
Conditions for Setting the DTC

K160 Brake System Control Module = Internal Malfunction

ia

Actions Taken When the DTC Sets

ABS Warning Indicator = ON

rd

Traction/Stability Control Indicator = ON

Service Brake Assist = ON
ca

Conditions for Clearing the DTC

The conditions for setting the DTC no longer exist.

Reference Information
Schematic Reference

Hydraulic Brake Schematics

Connector End View Reference

Master Electrical Component List

Electrical Information Reference

Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs
© 2023 General Motors. All rights reserved.

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4/26/23, 11:14 AM DTC C0594

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

1. Ignition » On / Vehicle » In Service Mode

2. Verify DTC C0049 is not set.
⇒ If the DTC is set
Refer to: Diagnostic Trouble Code (DTC) List - Vehicle
⇓ If the DTC is not set
3. Test or inspect for the following: Brake System Malfunction
Refer to: Disc Brake System Diagnosis
4. Perform the scan tool control function: Brake Hydraulics Test
⇒ If the procedure/test does not pass
Refer to: Hydraulic Brake System Bleeding
⇓ If the procedure/test passes

om
5. Verify DTC C0594 is not set.
⇒ If the DTC is set
If the DTC sets » Replace the component: A104 Brake Master Cylinder
⇓ If the DTC is not set
6. All OK.
.c
gn
Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
Verification
ia

For control module replacement, programming, and setup refer to: Control Module References
rd
ca

© 2023 General Motors. All rights reserved.

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4/26/23, 11:08 AM DTC C0609

2022 Buick Encore GX | | Brakes | Park Brake |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5324240

DTC C0609
Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C0609 Park Brake Switch Circuit

Symptom Byte Information: Symptom Byte List

Diagnostic Fault Information

om
Short to Open/High Short to Signal
Circuit Ground Resistance Voltage Performance

Park Brake Switch Supply Voltage

— Terminal 29
.c C0609 02 C0609 04
C0609 01
C0609 61
C0609 08
C0609 5A
gn
Park Brake Apply Switch Voltage C0609 01 C0609 08
C0609 02 C0609 04
Reference — Terminal 44 C0609 61 C0609 5A
ia

Park Brake Apply Switch Signal — C0609 01 C0609 08

C0609 02 C0609 04
Terminal 15 C0609 61 C0609 5A
rd

Park Brake Release Switch Signal C0609 01 C0609 08

C0609 02 C0609 04
— Terminal 9 C0609 61 C0609 5A
ca

Park Brake Release Switch Voltage C0609 01 C0609 08

C0609 02 C0609 04
Reference — Terminal 28 C0609 61 C0609 5A

Park Brake Switch Signal — C0609 01 C0609 08

C0609 02 C0609 04
Terminal 17 C0609 61 C0609 5A

Circuit/System Description

For an overview of the component/system, refer to: Electronic Parking Brake Description

Circuit Description

Park Brake Switch Supply Voltage —

Supplied by a control module.
Terminal 29

Park Brake Switch Signal — Terminal The control module input circuit has an internal
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4/26/23, 11:08 AM DTC C0609

Circuit Description

17 resistance connected to 12 V.

Park Brake Apply Switch Voltage

Regulated voltage supplied by the control module.
Reference — Terminal 44

Park Brake Apply Switch Signal — The control module input circuit has an internal
Terminal 15 resistance connected to 12 V.

Park Brake Release Switch Voltage

Regulated voltage supplied by the control module.
Reference — Terminal 28

Park Brake Release Switch Signal — The control module input circuit has an internal
Terminal 9 resistance connected to 5 V.

Component Description

om
The control module K160 receives input from the
S91 Park Brake Control Switch switch S91 to command the park brakes to apply or
release.

.c The control module K160 can increase and decrease

the brake pressure on all 4 wheels individually in order
to fulfill these functions:
gn
Antilock Braking
Traction Control
ia

Vehicle Stability Control

K160 Brake System Control Module
The control module K160 can also influence the
rd

following control modules to limit the amount of

produced torque:
ca

K20 Engine Control Module

K71 Transmission Control Module

Conditions for Running the DTC

System Voltage = 9 to 16 V

Conditions for Setting the DTC

K160 Brake System Control Module = Short to Ground — S91 Park Brake Control Switch
K160 Brake System Control Module = Short to Voltage — S91 Park Brake Control Switch
K160 Brake System Control Module = Open/High Resistance — S91 Park Brake Control
Switch
K160 Brake System Control Module = Malfunction — S91 Park Brake Control Switch
S91 Park Brake Control Switch = Activated — Greater than 90 s

Actions Taken When the DTC Sets

© 2023
Parking Brake Actuator General Motors. All rights reserved.
= Disabled

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4/26/23, 11:08 AM DTC C0609

A message and/or warning indicator may be displayed to the driver.

Conditions for Clearing the DTC

The conditions for setting the DTC no longer exist.

A history DTC will clear after 40 consecutive malfunction-free ignition cycles.

Reference Information
Schematic Reference

Park Brake System Schematics

Connector End View Reference

Master Electrical Component List

Electrical Information Reference

Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections

om
Wiring Repairs

Scan Tool Reference

Control Module References

Circuit/System Verification
.c
gn
1. Ignition » On / Vehicle » In Service Mode
2. Press and release the switch: S91 Park Brake Control Switch
3. Verify the scan tool parameter: Park Brake Switch = Apply & Released
ia

⇒ If the parameter state does not change

Refer to: Circuit/System Testing
rd

⇓ If the parameter state changes

4. All OK.
ca

Circuit/System Testing

1. Ignition/Vehicle » Off .
2. Disconnect the electrical connector: K160 Brake System Control Module
3. Ignition » On / Vehicle » In Service Mode
4. Test for less than 1 V between the test points:
Terminal 29 @ K160 Brake System Control Module & Ground
Terminal 44 @ K160 Brake System Control Module & Ground
Terminal 15 @ K160 Brake System Control Module & Ground
Terminal 9 @ K160 Brake System Control Module & Ground
Terminal 28 @ K160 Brake System Control Module & Ground
Terminal 17 @ K160 Brake System Control Module & Ground
⇒ If 1 V or greater
Repair the short to voltage on the circuit.
⇓ If less than 1 V
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4/26/23, 11:08 AM DTC C0609

5. Ignition/Vehicle » Off
6. Test for infinite resistance between the test points:
Terminal 29 @ K160 Brake System Control Module & Ground
Terminal 44 @ K160 Brake System Control Module & Ground
Terminal 15 @ K160 Brake System Control Module & Ground
Terminal 9 @ K160 Brake System Control Module & Ground
Terminal 28 @ K160 Brake System Control Module & Ground
Terminal 17 @ K160 Brake System Control Module & Ground
⇒ If less than infinite resistance
Repair the short to ground on the circuit.
⇓ If infinite resistance
7. Test for less than 5 Ω between the test points: Terminal 28 & Terminal 9
⇒ If 5 Ω or greater
7.1. Ignition/Vehicle » Off
7.2. Disconnect the electrical connector: S91 Park Brake Control Switch

om
7.3. Test for less than 2 Ω between the test points:
Terminal 28 @ Control module harness & The other end of the circuit @ Component
harness
Terminal 9 @ Control module harness & The other end of the circuit @ Component
harness .c
⇒ If 2 Ω or greater » Repair the open/high resistance in the circuit.
gn
⇒ If less than 2 Ω » Replace the component: S91 Park Brake Control Switch
⇓ If less than 5 Ω
8. Test for less than 5 Ω between the test points: Terminal 44 & Terminal 15
ia

⇒ If 5 Ω or greater
8.1. Ignition/Vehicle » Off
rd

8.2. Disconnect the electrical connector: S91 Park Brake Control Switch
8.3. Test for less than 2 Ω between the test points:
ca

Terminal 44 @ Control module harness & The other end of the circuit @ Component
harness
Terminal 15 @ Control module harness & The other end of the circuit @ Component
harness
⇒ If 2 Ω or greater » Repair the open/high resistance in the circuit.
⇒ If less than 2 Ω » Replace the component: S91 Park Brake Control Switch
⇓ If less than 5 Ω
9. Test for less than 5 Ω between the test points: Terminal 29 & Terminal 17
⇒ If 5 Ω or greater
9.1. Ignition/Vehicle » Off
9.2. Disconnect the electrical connector: S91 Park Brake Control Switch
9.3. Test for less than 2 Ω between the test points:
Terminal 29 @ Control module harness & The other end of the circuit @ Component
harness
Terminal 17 @ Control module harness & The other end of the circuit @ Component
harness © 2023 General Motors. All rights reserved.

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4/26/23, 11:08 AM DTC C0609

⇒ If 2 Ω or greater » Repair the open/high resistance in the circuit.

⇒ If less than 2 Ω » Replace the component: S91 Park Brake Control Switch
⇓ If less than 5 Ω
10. Test for less than 5 Ω between the test points: Terminal 17 & Terminal 9 » Control Switch
Pressed
⇒ If 5 Ω or greater
Replace the component: S91 Park Brake Control Switch
⇓ If less than 5 Ω
11. Test for less than 5 Ω between the test points: Terminal 17 & Terminal 15 » Control Switch
Pressed
⇒ If 5 Ω or greater
Replace the component: S91 Park Brake Control Switch
⇓ If less than 5 Ω
12. Operate the vehicle within the Conditions for Running the DTC.
13. Verify the DTC does not set.
⇒ If the DTC is set

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Replace the component: K160 Brake System Control Module
⇓ If the DTC does not set
14. All OK.

Repair Instructions .c
Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
gn
Verification

Parking Brake Control Switch Replacement

ia

For control module replacement, programming, and setup refer to: Control Module
References
rd
ca

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4/26/23, 11:08 AM DTC C0610

2022 Buick Encore GX | | Brakes | Park Brake |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5096809

DTC C0610
Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C0610 Right Park Brake Actuator Circuit

Symptom Byte Information: Symptom Byte List

Diagnostic Fault Information

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Short to Open/High Short to Signal
Circuit Ground Resistance Voltage Performance

Control — Terminal 2 @ K160 Brake

System Control Module
.c C0610 00
C0610 03
C0610 05
C0610 00
C0610 05
C0610 39
C0610 58
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Control — Terminal 3 @ K160 Brake C0610 00 C0610 00 C0610 39
C0610 05
System Control Module C0610 03 C0610 05 C0610 58
ia

Circuit/System Description
rd

For an overview of the component/system, refer to: Electronic Parking Brake Description

Circuit Description
ca

The output circuit is switched from ground to 12 V to

Control — Terminal 2
activate the component.

The output circuit is switched from ground to 12 V to

Control — Terminal 3
activate the component.

Component Description

The park brake function uses the same brake pads as

M104R Park Brake Actuator - Right the operational brake. An electric motor is used to
apply and release the brake pads.

K160 Brake System Control Module The control module K160 can increase and decrease
the brake pressure on all 4 wheels individually in order
to fulfill these functions:

Antilock
© 2023 General Motors. Braking
All rights reserved.

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4/26/23, 11:08 AM DTC C0610

Component Description

Traction Control
Vehicle Stability Control

The control module K160 can also influence the

following control modules to limit the amount of
produced torque:

K20 Engine Control Module

K71 Transmission Control Module

Conditions for Running the DTC

Ignition = On
System Voltage = 9 to 16 V

Conditions for Setting the DTC

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M104R Park Brake Actuator - Right = Malfunction
Right Park Brake Actuator Circuit = Malfunction

Actions Taken When the DTC Sets

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Parking Brake Actuator = Disabled
The park brake can be released one single time.
gn
A message and/or warning indicator may be displayed to the driver.

Conditions for Clearing the DTC

ia

The conditions for setting the DTC no longer exist.

A history DTC will clear after 40 consecutive malfunction-free ignition cycles.
rd

Diagnostic Aids

The park brake is disabled as long as the DTC is set. It might be necessary to clear the DTC with a
ca

scan tool after repairing the fault to make the park brake work again.

Reference Information
Schematic Reference

Park Brake System Schematics

Connector End View Reference

Master Electrical Component List

Electrical Information Reference

Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs

Scan Tool Reference

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4/26/23, 11:08 AM DTC C0610

Control Module References

Circuit/System Verification

1. Ignition » On / Vehicle » In Service Mode

2. Operate the component: S91 Park Brake Control Switch
Verify the scan tool parameter: Right Park Brake Actuator Status = Applied
⇒ If not the specified state
Refer to: Circuit/System Testing
⇓ If the specified state
3. Operate the component: S91 Park Brake Control Switch
Verify the scan tool parameter: Right Park Brake Actuator Status = Released
⇒ If not the specified state
Refer to: Circuit/System Testing
⇓ If the specified state
4. All OK.

om
Circuit/System Testing

Note: The park brake is disabled as long as the DTC is set. It might be necessary to clear the DTC
with a scan tool after repairing the fault to make the park brake work again.

C0610 00, 03, 05

1. Ignition/Vehicle » Off
.c
gn
2. Disconnect the electrical connector: M104R Park Brake Actuator - Right & K160 Brake System
Control Module
3. Ignition » On / Vehicle » In Service Mode
ia

4. Test for less than 1 V between the test points:

Terminal 2 @ K160 Brake System Control Module & Ground
rd

Terminal 3 @ K160 Brake System Control Module & Ground

⇒ If 1 V or greater
Repair the short to voltage on the circuit.
ca

⇓ If less than 1 V
5. Ignition/Vehicle » Off
6. Test for infinite resistance between the test points:
Terminal 2 @ K160 Brake System Control Module & Ground
Terminal 3 @ K160 Brake System Control Module & Ground
⇒ If less than infinite resistance » Repair the short to ground on the circuit.
⇓ If infinite resistance
7. Test for less than 2 Ω between the test points: Terminal 1 @ Harness Connector - M104R Park
Brake Actuator - Right & Terminal 2 @ Harness Connector - K160 Brake System Control
Module
⇒ If 2 Ω or greater » Repair the open/high resistance in the circuit.
⇓ If less than 2 Ω
8. Test for less than 2 Ω between the test points: Terminal 2 @ Harness Connector - M104R Park
Brake Actuator - Right & Terminal 3 @ Harness Connector - K160 Brake System Control
Module
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4/26/23, 11:08 AM DTC C0610

⇒ If 2 Ω or greater » Repair the open/high resistance in the circuit.

⇓ If less than 2 Ω
9. Connect a 25 A fused jumper wire between the test points: Control terminal 1 or Control
terminal 2 & 12 V
Caution: Complete the testing as quickly as possible in order to prevent overheating and
damaging the component.
10. Momentarily connect a jumper wire between the test points: Control terminal 2 or Control
terminal 1 & Ground
Reverse the jumper wires 2 times between the terminals.
Verify the component works as specified: M104R Park Brake Actuator - Right = Apply &
Release
⇒ If not the specified state
Replace the component: M104R Park Brake Actuator - Right
⇓ If the specified state
11. Replace the component: K160 Brake System Control Module

C0610 39

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1. Ignition » On / Vehicle » In Service Mode
2. Verify DTC C0610 39 is not set.
⇒ If the DTC is set

.c
2.1. Perform the following learn procedure: Park Brake Calibration.
2.2. Ignition » On / Vehicle » In Service Mode
gn
2.3. Apply the parking brake.
2.4. Release the parking brake.
2.5. Verify the DTC does not set.
ia

⇒ If the DTC sets » Replace the component: M104L Park Brake Actuator - Left
⇓ If the DTC is not set
rd

2.6. All OK.

⇓ If the DTC is not set
ca

3. All OK.

C0610 58

1. Ignition » On / Vehicle » In Service Mode

2. Verify DTC C0610 58 is not set.
⇒ If the DTC is set
Replace the component: K160 Brake System Control Module
⇓ If the DTC is not set
3. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
Verification

For control module replacement, programming, and setup refer to: Control Module References

© 2023 General Motors. All rights reserved.

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4/26/23, 11:09 AM DTC C0616

2022 Buick Encore GX | | Brakes | Park Brake |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5096811

DTC C0616
Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C0616 Park Brake Control Circuit Performance

Symptom Byte Information: Symptom Byte List

Circuit/System Description

om
For an overview of the component/system, refer to: Electronic Parking Brake Description

Component Description

Park Brake Actuator

.c The park brake function uses the same brake pads as
the operational brake. An electric motor is used to
gn
apply and release the brake pads.

The control module K160 can increase and decrease

ia

the brake pressure on all 4 wheels individually in order

to fulfill these functions:
rd

Antilock Braking
Traction Control
Vehicle Stability Control
ca

K160 Brake System Control Module

The control module K160 can also influence the
following control modules to limit the amount of
produced torque:

K20 Engine Control Module

K71 Transmission Control Module

Conditions for Running the DTC

Ignition = On or Vehicle = Service Mode

System Voltage = 9 to 16 V

Conditions for Setting the DTC

K160 Brake System Control Module — Park Brake = Internal Malfunction

K160 Brake System Control Module — Park Brake = Calibration Not Learned
Parking Brake Actuator = Stuck
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4/26/23, 11:09 AM DTC C0616

Actions Taken When the DTC Sets

Parking Brake Actuator = Disabled

The park brake can be released one single time.
A message and/or warning indicator may be displayed to the driver.

Conditions for Clearing the DTC

The conditions for setting the DTC no longer exist.

A history DTC will clear after 40 consecutive malfunction-free ignition cycles.

Reference Information
Schematic Reference

Park Brake System Schematics

Connector End View Reference

Master Electrical Component List

Electrical Information Reference

om
Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs

Scan Tool Reference

.c
gn
Control Module References

Circuit/System Verification
ia

C0616 00, 39, 4B

rd

1. Ignition » On / Vehicle » In Service Mode

2. Verify DTC C0616 is not set.
⇒ If the DTC is set
ca

2.1. Perform the following learn procedure: Park Brake Calibration.

2.2. Ignition » On / Vehicle » In Service Mode
2.3. Apply the parking brake.
2.4. Release the parking brake.
2.5. Verify the DTC does not set.
⇒ If the DTC sets » Replace the component: K160 Brake System Control Module
⇓ If the DTC is not set
2.6. All OK.
⇓ If the DTC is not set
3. All OK.

C0616 61

1. Ignition » On / Vehicle » In Service Mode

2. Verify the condition does not exist: Parking Brake System = Service Release
© 2023 General Motors. All rights reserved.
⇒ If a condition exists

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4/26/23, 11:09 AM DTC C0616

Perform the following learn procedure: Park Brake Calibration.

⇓ If no condition exists
3. Verify DTC C0616 is not set.
⇒ If the DTC is set
3.1. Verify the correct operation: Parking Brake System Refer to: Park Brake System
Diagnosis
3.2. Verify the condition does not exist: Rear Disc Brake Pad = Worn Refer to: Brake Pad
Inspection
3.3. Perform all necessary programming and setup procedures for the control module: K160
Brake System Control Module
3.4. Ignition » On / Vehicle » In Service Mode
3.5. Apply the parking brake.
3.6. Release the parking brake.
3.7. Verify the DTC does not set.
⇒ If the DTC is set
3.7.1. Test for less than 50 Ω between the test points: Terminal 1 & Terminal 2 @ M104L

om
Park Brake Actuator - Left & Terminal 1 & Terminal 2 @ M104R Park Brake Actuator
- Right
⇒ If greater than 50 Ω » Replace the component: M104L Park Brake Actuator - Left or
M104R Park Brake Actuator - Right
.c
⇒ If less than 50 Ω » Replace the component: K160 Brake System Control Module
⇓ If the DTC is not set
gn
4. All OK.
⇓ If the DTC is not set
5. All OK.
ia

Repair Instructions
rd

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
Verification

For control module replacement, programming, and setup refer to: Control Module
ca

References

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4/26/23, 10:56 AM DTC C1211

2022 Buick Encore GX | | Brakes | Antilock Brake System |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5083247

DTC C1211
Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C1211 Steering Wheel Angle Sensor Signal Message Counter Incorrect

Symptom Byte Information: Symptom Byte List

Circuit/System Description

om
For an overview of the component/system, refer to: ABS Description and Operation

Conditions for Running the DTC

Engine = Running

Conditions for Setting the DTC

.c
gn
Invalid Data Received From Steering Wheel Angle Sensor Module

Actions Taken When the DTC Sets

ia

Traction/Stability Control Indicator = ON

A message and/or warning indicator may be displayed to the driver.
rd

Conditions for Clearing the DTC

ca

A current DTC will clear when the diagnostic runs and passes.

Reference Information
Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

Master Electrical Component List

Electrical Information Reference

Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs

Scan Tool Reference

Control Module References

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4/26/23, 10:56 AM DTC C1211

Circuit/System Verification

1. Verify there are no other DTCs set, except for DTC C1211.
⇒ If any other DTCs are set
Refer to: Diagnostic Trouble Code (DTC) List - Vehicle
⇓ If no other DTCs are set
2. Replace the component: Steering Angle Sensor
3. Under normal operating conditions: Verify that no DTCs are set.
⇒ If the DTC sets
Replace the component for which the DTC was set.
⇓ If no DTC is set
4. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
Verification

om
For control module replacement, programming, and setup refer to: Control Module References

.c
gn
ia
rd
ca

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4/26/23, 10:56 AM DTC C1259

2022 Buick Encore GX | | Brakes | Antilock Brake System |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5125700

DTC C1259
Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C1259 ECM Request for Automatic Braking Message Counter Incorrect

Symptom Byte Information: Symptom Byte List

Circuit/System Description

om
Control modules connected to the serial data circuits monitor the communication during normal
vehicle operation. Operating information and commands are exchanged among the control
modules. Each module on the serial data circuit maintains a transmit error counter and a receive
error counter. The counter values increase with detected errors and decrease with error-free
messages.

Conditions for Running the DTC

.c
gn
Ignition/Vehicle = ON

Conditions for Setting the DTC

ia

Serial Data = Message Counter Incorrect — Between the following control modules:
rd

K160 Brake System Control Module

K20 Engine Control Module
ca

Actions Taken When the DTC Sets

None

Conditions for Clearing the DTC

The conditions for setting the DTC no longer exist.

Reference Information
Scan Tool Reference

Control Module References

Circuit/System Verification

1. Ignition » On / Vehicle » In Service Mode

2. Verify there are no DTCs set related to the following component/system: Serial Data
⇒ If a related DTC is set
Refer to: Diagnostic Trouble Code (DTC) List - Vehicle
⇓ If a related DTC is not set General Motors. All rights reserved.
© 2023

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4/26/23, 10:56 AM DTC C1259

3. Clear the DTCs.

4. Operate the vehicle within the Conditions for Running the DTC.
Verify the DTC does not set.
⇒ If the DTC sets
4.1. Ignition/Vehicle » Off
4.2. Replace the component: K160 Brake System Control Module
4.3. Operate the vehicle within the Conditions for Running the DTC.
4.4. Verify the DTC does not set.
⇒ If the DTC sets » Replace the component: K20 Engine Control Module
⇓ If the DTC is not set
4.5. All OK.
⇓ If the DTC is not set
5. All OK.

Repair Instructions

om
Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
Verification

For control module replacement, programming, and setup refer to: Control Module References

.c
gn
ia
rd
ca

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4/26/23, 10:57 AM DTC C1268

2022 Buick Encore GX | | Brakes | Antilock Brake System |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5081120

DTC C1268
Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C1268 Accelerator Pedal Override Active Message Counter Incorrect

Symptom Byte Information: Symptom Byte List

Circuit/System Description

om
For an overview of the component/system, refer to: ABS Description and Operation

Conditions for Running the DTC

Engine = Running

Conditions for Setting the DTC

.c
gn
Invalid Data Received From Engine Control Module

Actions Taken When the DTC Sets

ia

ABS Warning Indicator = OFF

Traction/Stability Control Indicator = OFF
rd

Conditions for Clearing the DTC

ca

A current DTC will clear when the diagnostic runs and passes.

Reference Information
Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

Master Electrical Component List

Electrical Information Reference

Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs

Scan Tool Reference

Control Module References

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4/26/23, 10:57 AM DTC C1268

Circuit/System Verification

1. Verify there are no other DTCs set, except for DTC C1268.
⇒ If any other DTCs are set
Refer to: Diagnostic Trouble Code (DTC) List - Vehicle
⇓ If no other DTCs are set
2. Replace the component: K20 Engine Control Module
3. Under normal operating conditions: Verify that no DTCs are set.
⇒ If the DTC sets
Replace the component: K160 Brake System Control Module
⇓ If no DTC is set
4. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
Verification

om
For control module replacement, programming, and setup refer to: Control Module References

.c
gn
ia
rd
ca

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4/26/23, 11:09 AM DTC C1280 or C1281

2022 Buick Encore GX | | Brakes | Park Brake |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 4579954

DTC C1280 or C1281

Diagnostic Instructions

Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
Review Strategy Based Diagnosis for an overview of the diagnostic approach.
Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC C1280 Electric Park Brake Availability Status Message Counter Incorrect

DTC C1281 Electric Park Brake Application Status Message Counter Incorrect

Circuit/System Description

The Electronic Brake Control Module/Brake System Control Module contains the logic for the

om
parking brake function. The EBCM/BSCM sends out a EPB availability and application status signal
on the high speed GMLAN which is monitored by the Engine Control Module. The ECM uses this
information for certain functions associated with the Electronic Transmission Range Selector. The
ECM needs to verify that EPB functionality is available for ETRS Critical Fault Mode or Latent Fault
Mode.

Conditions for Running the DTC

.c
gn
The system voltage is between 9–16 V.

Conditions for Setting the DTC

ia

A supervised periodic message from the electronic brake control module/brake system control
modulehas not been received by the engine control module or the engine control module has
detected an incorrect message counter.
rd

Action Taken When the DTC Sets

ETRS Automatic Braking unavailable.

ca

If vehicle is in Park when the fault is active, the vehicle may not be able to shift out of Park.

Conditions for Clearing the DTC

A current DTC clears when the malfunction is no longer present.

A history DTC clears when the device ignition cycle counter reaches the reset threshold of
50, without a repeat of the malfunction.

Reference Information
Schematic Reference

Park Brake System Schematics

Control Module References

Connector End View Reference

Master Electrical Component List

Description and Operation

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4/26/23, 11:09 AM DTC C1280 or C1281

Data Link Communications Description and Operation

Electrical Information Reference

Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Testing

1. Ignition ON.
2. Verify that no other DTCs are set.
⇒ If any other DTCs are set
Refer to Diagnostic Trouble Code (DTC) List - Vehicle.

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⇓ If no other DTCs are set
3. Reprogram the K17 Electronic Brake Control Module/K160 Brake System Control Module. Refer
to Control Module References
4. Ignition ON. Apply and release the park brake.
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5. Verify that DTC C1280 or C1281 is not set.
⇒ If DTC C1280 or C1281 is set
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5.1. Replace the K17 Electronic Brake Control Module/K160 Brake System Control Module.
5.2. Ignition ON.
5.3. Verify that DTC C1280 or C1281 is not set.
ia

⇒ If DTC C1280 or C1281 is set, replace the Control Module that set the DTC.
⇓ If DTC C1280 or C1281 is not set
rd

5.4. All OK.

⇓ If DTC C1280 or C1281 is not set
ca

6. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for control module replacement, programming and setup.

© 2023 General Motors. All rights reserved.

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4/26/23, 10:57 AM DTC C1288

2022 Buick Encore GX | | Brakes | Antilock Brake System |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5125822

DTC C1288
Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC C1288 Autonomous Braking - Accelerator Pedal Position Plausibility Message Counter
Incorrect

Symptom Byte Information: Symptom Byte List

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Circuit/System Description

Control modules connected to the serial data circuits monitor the communication during normal
vehicle operation. Operating information and commands are exchanged among the control
modules. Each module on the serial data circuit maintains a transmit error counter and a receive
.c
error counter. The counter values increase with detected errors and decrease with error-free
messages.
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Conditions for Running the DTC

Ignition/Vehicle = ON
ia

Conditions for Setting the DTC

Serial Data = Message Counter Incorrect — Between the following control modules:
rd

K160 Brake System Control Module

K20 Engine Control Module
ca

Actions Taken When the DTC Sets

Park Brake Indicator = On

Conditions for Clearing the DTC

The conditions for setting the DTC no longer exist.

Reference Information
Scan Tool Reference

Control Module References

Circuit/System Verification

1. Ignition » On / Vehicle » In Service Mode

2. Verify there are no DTCs set related to the following component/system: Serial Data
⇒ If a related DTC is set
Refer to: Diagnostic Trouble Code (DTC) List - Vehicle
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4/26/23, 10:57 AM DTC C1288

⇓ If a related DTC is not set

3. Clear the DTCs.
4. Operate the vehicle within the Conditions for Running the DTC.
Verify the DTC does not set.
⇒ If the DTC sets
4.1. Ignition/Vehicle » Off
4.2. Replace the component: K160 Brake System Control Module
4.3. Operate the vehicle within the Conditions for Running the DTC.
4.4. Verify the DTC does not set.
⇒ If the DTC sets » Replace the component: K20 Engine Control Module
⇓ If the DTC is not set
4.5. All OK.
⇓ If the DTC is not set
5. All OK.

Repair Instructions

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Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
Verification

For control module replacement, programming, and setup refer to: Control Module References
.c
gn
ia
rd
ca

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4/26/23, 10:57 AM DTC C1594

2022 Buick Encore GX | | Brakes | Antilock Brake System |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5125874

DTC C1594
Diagnostic Instructions

Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
Review Strategy Based Diagnosis for an overview of the diagnostic approach.
Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC C1594 Distance Sensing Cruise Control Braking Request - Accelerator Pedal Position Not
Plausible

Circuit/System Description

Adaptive cruise control is allowed via serial data inputs from various modules to the active safety
control module. The adaptive cruise control braking request signal is delivered from the active

om
safety control module to the electronic brake control module (EBCM) via serial data.

Conditions for Running the DTC

Vehicle in Service Mode.

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The ignition voltage is greater than 10 V.

Conditions for Setting the DTC

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The brake system control module detects that the adaptive cruise control braking request signal
value is not a continuous successor of the previous value.
ia

Action Taken When the DTC Sets

The ABS indicator turns ON.

rd

The MIL indicator may be on.

The traction control/stability control indicator turns ON.
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The Service StabiliTrak message is displayed on the driver information center.

The brake system control module disables the ABS, the traction control system and the
electronic stability program for the duration of the drive cycle.

Conditions for Clearing the DTC

The condition for setting the DTC is no longer present.

The history DTC will clear after 40 consecutive fault-free drive cycles have occurred.

Reference Information
Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

Master Electrical Component List

Description and Operation

© 2023 General Motors. All rights reserved.

ABS Description and Operation

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4/26/23, 10:57 AM DTC C1594

Electrical Information Reference

Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Diagnostic Aids

Inspect the active safety control module for any DTCs.

Inspect the engine control module for any DTCs, specifically for accelerator pedal DTCs.

Circuit/System Verification

1. Vehicle in Service Mode.

2. Verify that no other DTCs are set except for C1594.

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⇒ If any other DTCs are set
Refer to Diagnostic Trouble Code (DTC) List - Vehicle.
⇓ If no other DTCs are set

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3. Replace the K160 Brake System Control Module.

Repair Instructions
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Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for Electronic Brake Control Module or Engine Control Module
replacement, programming and setup
ia
rd
ca

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4/26/23, 11:01 AM DTC P15F8

2022 Buick Encore GX | | Brakes | Antilock Brake System |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5083323

DTC P15F8
Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC P15F8 Automatic Braking Engine Torque Request Signal Message Counter Incorrect

Symptom Byte Information: Symptom Byte List

Circuit/System Description

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For an overview of the component/system, refer to: ABS Description and Operation

Conditions for Running the DTC

Ignition/Vehicle = ON .c
Ignition Voltage = Greater than 8 V
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Conditions for Setting the DTC

K20 Engine Control Module = Lost Communication with Brake System Control Module
ia

Actions Taken When the DTC Sets

The ABS remains functional.

rd

P15F8 = Type B DTC

Traction/Stability Control Indicator = ON
ca

A message and/or warning indicator may be displayed to the driver.

Conditions for Clearing the DTC

P15F8 = Type B DTC

Reference Information
Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

Master Electrical Component List

Electrical Information Reference

Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
© 2023 General Motors. All rights reserved.

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4/26/23, 11:01 AM DTC P15F8

Wiring Repairs

Scan Tool Reference

Control Module References

Circuit/System Verification

1. Verify there are no other DTCs set, except for DTC P15F8.
⇒ If any other DTCs are set
Refer to: Diagnostic Trouble Code (DTC) List - Vehicle
⇓ If no other DTCs are set
2. Replace the component: K160 Brake System Control Module
3. Under normal operating conditions: Verify that no DTCs are set.
⇒ If the DTC sets
Replace the component: K20 Engine Control Module
⇓ If no DTC is set
4. All OK.

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Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
Verification
.c
For control module replacement, programming, and setup refer to: Control Module References
gn
ia
rd
ca

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4/26/23, 11:01 AM DTC P15FD

2022 Buick Encore GX | | Brakes | Antilock Brake System |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5083329

DTC P15FD
Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC P15FD Wheel Speed Sensor Message Sequence Incorrect

Symptom Byte Information: Symptom Byte List

Circuit/System Description

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For an overview of the component/system, refer to: ABS Description and Operation

Conditions for Running the DTC

Ignition/Vehicle = ON

Conditions for Setting the DTC

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gn
A periodic message that indicates the transmitting device's availability has not been received.

Actions Taken When the DTC Sets

ia

Unexpected Operation & Some functions will not work.

Conditions for Clearing the DTC

rd

The conditions for setting the DTC no longer exist.

ca

Diagnostic Aids

Inspect the component for wear or damage: B5 Wheel Speed Sensor .

Do NOT use a magnet to clean the component: Encoder Ring .
Inspect the following components: B5 Wheel Speed Sensor = Correct part .
If the customer comments that the ABS indicator is ON only during moist environmental
conditions (rain, snow, vehicle washed), inspect the wheel speed sensor wiring for signs of
water intrusion.

Reference Information
Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

Master Electrical Component List

Electrical Information Reference

© 2023 General Motors. All rights reserved.
Circuit Testing
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4/26/23, 11:01 AM DTC P15FD
C cu t est g
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs

Scan Tool Reference

Control Module References

Circuit/System Verification

1. Ignition » On / Vehicle » In Service Mode

2. Test drive the vehicle.
3. All sensors must show the same speed when driving in a straight line at a speed greater than
40 km/h (25 MPH).

Circuit/System Testing

1. Ignition » On / Vehicle » In Service Mode

2. Verify there are no DTCs set related to the following component/system: B5 Wheel Speed
Sensor @ K160 Brake System Control Module

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⇒ If any of the DTCs are set
Refer to: Diagnostic Trouble Code (DTC) List - Vehicle
⇓ If no other DTCs are set
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3. Replace the component: K160 Brake System Control Module

Repair Instructions
gn
Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
Verification

For control module replacement, programming, and setup refer to: Control Module References
ia
rd
ca

© 2023 General Motors. All rights reserved.

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4/26/23, 11:01 AM DTC P18E2

2022 Buick Encore GX | | Brakes | Antilock Brake System |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5152298

DTC P18E2
Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC P18E2 Automatic Vehicle Hold Status Message Counter Incorrect

Symptom Byte Information: Symptom Byte List

Circuit/System Description

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Control modules connected to the serial data circuits monitor the communication during normal
vehicle operation. Operating information and commands are exchanged among the control
modules. Each module on the serial data circuit maintains a transmit error counter and a receive
error counter. The counter values increase with detected errors and decrease with error-free
messages.

Conditions for Running the DTC

.c
gn
Ignition/Vehicle = ON

Conditions for Setting the DTC

ia

Serial Data = Message Counter Incorrect — Between the following control modules:
rd

K160 Brake System Control Module

K20 Engine Control Module
ca

Actions Taken When the DTC Sets

DTC P18E2 = Type B DTC

Conditions for Clearing the DTC

DTC P18E2 = Type B DTC

Reference Information
DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References

Circuit/System Verification

1. Ignition » On / Vehicle » In Service Mode

2. Verify there are no DTCs set related to the following component/system: Serial Data
© 2023 General Motors. All rights reserved.
⇒ If a related DTC is set
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4/26/23, 11:01 AM DTC P18E2
⇒ If a related DTC is set
Refer to: Diagnostic Trouble Code (DTC) List - Vehicle
⇓ If a related DTC is not set
3. Clear the DTCs.
4. Operate the vehicle within the Conditions for Running the DTC.
Verify the DTC does not set.
⇒ If the DTC sets
4.1. Ignition/Vehicle » Off
4.2. Replace the component: K160 Brake System Control Module
4.3. Operate the vehicle within the Conditions for Running the DTC.
4.4. Verify the DTC does not set.
⇒ If the DTC sets » Replace the component: K20 Engine Control Module
⇓ If the DTC is not set
4.5. All OK.
⇓ If the DTC is not set
5. All OK.

om
Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
Verification
.c
For control module replacement, programming, and setup refer to: Control Module References
gn
ia
rd
ca

© 2023 General Motors. All rights reserved.

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4/26/23, 11:15 AM DTC P25C6 or P25C7

2022 Buick Encore GX | | Brakes | Hydraulic Brakes |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 4992125

DTC P25C6 or P25C7

Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC P25C6 Control Module Temperature Sensor 1 Circuit Low Voltage

DTC P25C7 Control Module Temperature Sensor 1 Circuit High Voltage

Symptom Byte Information: Symptom Byte List

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Circuit/System Description

For an overview of the component/system, refer to: Hydraulic Brake System Description and
Operation

Conditions for Running the DTC

.c
gn
Ignition/Vehicle = OFF

Conditions for Setting the DTC

ia

Brake Booster Control Module Temperature = Out Of Range

Actions Taken When the DTC Sets

rd

None

Conditions for Clearing the DTC

ca

The conditions for setting the DTC no longer exist.

Reference Information
Schematic Reference

Hydraulic Brake Schematics

Connector End View Reference

Master Electrical Component List

Electrical Information Reference

Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs

Scan Tool Reference

© 2023 General Motors. All rights reserved.

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4/26/23, 11:15 AM DTC P25C6 or P25C7

Control Module References for scan tool information

Circuit/System Verification

1. Ignition » On / Vehicle » In Service Mode

2. Verify DTC is not set:
⇒ If the DTC is set
2.1. Perform all necessary programming and setup procedures for the control module: K160
Brake System Control Module
2.2. Verify the DTC does not set.
⇒ If the DTC sets » Replace the component: K160 Brake System Control Module
⇓ If the DTC is not set
2.3. All OK.
⇓ If the DTC is not set
3. All OK.

Repair Instructions

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Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
Verification

For control module replacement, programming, and setup refer to: Control Module References

.c
gn
ia
rd
ca

© 2023 General Motors. All rights reserved.

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4/26/23, 11:02 AM DTC P30EC

2022 Buick Encore GX | | Brakes | Antilock Brake System |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5087333

DTC P30EC
Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC P30EC Brake System Control Module Minimum Voltage Request Signal Message Counter
Incorrect

Symptom Byte Information: Symptom Byte List

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Circuit/System Description

For an overview of the component/system, refer to: ABS Description and Operation

Conditions for Running the DTC

Ignition/Vehicle = ON
.c
gn
Conditions for Setting the DTC

K20 Engine Control Module = K160 Brake System Control Module — Message Counter Incorrect
ia

Actions Taken When the DTC Sets

DTCs listed in the DTC Descriptor category = Type B DTC

rd

Conditions for Clearing the DTC

DTCs listed in the DTC Descriptor category = Type B DTC

ca

Reference Information
Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

Master Electrical Component List

Electrical Information Reference

Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

© 2023 General Motors. All rights reserved.

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4/26/23, 11:02 AM DTC P30EC

Scan Tool Reference

Control Module References

Circuit/System Verification

1. Ignition » On / Vehicle » In Service Mode

2. Verify no other DTCs are set.
⇒ If other DTCs are set
Refer to: Diagnostic Trouble Code (DTC) List - Vehicle
⇓ If no other DTCs are set
3. Replace the component: K160 Brake System Control Module
4. Verify the DTC does not set.
⇒ If the DTC is set
Replace the component: K20 Engine Control Module
⇓ If the DTC is not set
5. All OK.

om
Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
Verification
.c
For control module replacement, programming, and setup refer to: Control Module References
gn
ia
rd
ca

© 2023 General Motors. All rights reserved.

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4/26/23, 11:02 AM DTC P215A

2022 Buick Encore GX | | Brakes | Antilock Brake System |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5169710

DTC P215A
Diagnostic Instructions

Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
Review Strategy Based Diagnosis for an overview of the diagnostic approach.
Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC P215A Vehicle Speed Signal

Diagnostic Fault Information

Component Condition DTC

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Loose or improperly mounted
sensor
Physical damage
Debris on the wheel speed sensor or
.c the encoder ring
Loose or worn wheel bearing
C0555,
C0556,
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Wheel Speed Sensor Air gap between the wheel speed C0557,
sensor and the encoder ring too C0558,
large P215A
ia

Water intrusion in the wiring

harness
Incorrect wheel/tire combination
rd

Incorrect tire inflation

ca

Circuit/System Description

The wheel speeds are detected by active wheel speed sensors and encoder rings. The encoder
rings consist of permanent magnets located in the hub. As the wheel spins the magnetic encoder
ring rotates and passes by the wheel speed sensor head; which generates a sign wave in the
wheel speed sensor. Each wheel speed sensor receives ignition voltage from the brake system
control module and provides an alternating current square wave signal to the brake system
control module. The brake system control module uses the frequency of the signals to calculate
the wheel speeds.

Conditions for Running the DTC

Vehicle On or Vehicle in Service Mode

Ignition voltage is greater than 10 V.

Conditions for Setting the DTC

Loose or improperly mounted sensor

The tone ring may be demagnetized
© 2023 General Motors. All rights reserved.

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4/26/23, 11:02 AM DTC P215A

Water intrusion in the wiring harness

Debris on the wheel speed sensor or the tone ring
Missing tooth or teeth on the wheel speed sensor tone ring
Air gap between the wheel speed sensor and the tone ring too large
Electrical magnetic interference with the wheel speed sensor harness

Actions Taken when the DTC Sets

The ABS indicator turns ON.

The traction/stability control indicator turns ON.
The Service Brake Assist and Service StabiliTrak messages are displayed on the driver
information center.
The brake system control module disables the ABS, the traction control system and the
electronic stability program for the duration of the drive cycle.

Conditions for Clearing the DTC

The condition for setting the DTC is no longer present.

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The history DTC will clear after 40 consecutive fault-free drive cycles have occurred.

Diagnostic Aids

Do not use a magnet to clean the wheel speed sensor magnetic encoder ring.
.c
Inspect the wheel speed sensor magnetic encoder ring for debris or corrosion.
If two or more wheel speed sensors are inoperative, diagnose each wheel speed sensor
individually.
gn
If any of the DTCs are set, refer to the Diagnostic Fault Information table for possible
mechanical faults or conditions.
If the customer comments that the ABS indicator is ON only during moist environmental
ia

conditions (rain, snow, vehicle wash, etc.), inspect the wheel speed sensor wiring for signs
of water intrusion.
rd

An incorrect wheel and tire size or mounting issue may also cause DTC P215A to set.
Incorrect tire inflation
ca

Reference Information
Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

Master Electrical Component List

Description and Operation

ABS Description and Operation

Electrical Information Reference

Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs

Scan Tool Reference © 2023 General Motors. All rights reserved.

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4/26/23, 11:02 AM DTC P215A

Control Module References for scan tool information

Circuit/System Verification

1. Test drive the vehicle in a straight line at a speed greater than 20 km/h (13 MPH).
2. Verify all scan tool Wheel Speed Sensor parameters are within 1.6 km/h (1 MPH) of each other.
⇒ If any parameter is not within 1.6 km/h (1 MPH) of each other
Refer to Circuit/System Testing.
⇓ If each parameter is within 1.6 km/h (1 MPH) of each other
3. All OK.

Circuit/System Testing

1. Ignition On
2. Verify DTCs C0500-C0504, C0506-C0510, C050A, C050C-C050F, or C0512-C0516 are not set.
⇒ If any listed DTCs are set
Refer to Diagnostic Trouble Code (DTC) List - Vehicle
⇓ If none of the listed DTCs are set

om
3. Inspect the appropriate B5 Wheel Speed Sensor and encoder ring for contamination, metallic
particles, physical damage, incorrect installation and the correct component.
⇒ If contamination, physical damage, incorrect installation, or the wrong component is
diagnosed
.c
Replace the appropriate B5 Wheel Speed Sensor.
⇓ If no contamination, physical damage, incorrect installation, or the wrong component
gn
is not diagnosed
4. Replace the K160 Brake System Control Module.

Repair Instructions
ia

Perform the Diagnostic Repair Verification after completing the repair.

rd

Front Wheel Speed Sensor Replacement

Rear Wheel Speed Sensor Replacement
ca

Control Module References for Electronic Brake Control Module replacement, programming
and setup

© 2023 General Motors. All rights reserved.

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4/26/23, 11:02 AM DTC P314F

2022 Buick Encore GX | | Brakes | Antilock Brake System |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5088853

DTC P314F
Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC P314F Brake System Vehicle Speed Limit Request Signal Message Counter Incorrect

Symptom Byte Information: Symptom Byte List

Circuit/System Description

om
For an overview of the component/system, refer to: ABS Description and Operation

Conditions for Running the DTC

Ignition/Vehicle = ON

Conditions for Setting the DTC

.c
gn
K20 Engine Control Module = K160 Brake System Control Module — Message Counter Incorrect

Actions Taken When the DTC Sets

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DTCs listed in the DTC Descriptor category = Type B DTC

Conditions for Clearing the DTC

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DTCs listed in the DTC Descriptor category = Type B DTC

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Reference Information
Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

Master Electrical Component List

Electrical Information Reference

Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs

Scan Tool Reference

Control Module References

Circuit/System Verification© 2023 General Motors. All rights reserved.

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4/26/23, 11:02 AM DTC P314F

1. Ignition » On / Vehicle » In Service Mode

2. Verify no other DTCs are set.
⇒ If other DTCs are set
Refer to: Diagnostic Trouble Code (DTC) List - Vehicle
⇓ If no other DTCs are set
3. Replace the component: K160 Brake System Control Module
4. Verify the DTC does not set.
⇒ If the DTC is set
Replace the component: K20 Engine Control Module
⇓ If the DTC is not set
5. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
Verification

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For control module replacement, programming, and setup refer to: Control Module References

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4/26/23, 11:00 AM DTC P0856

2022 Buick Encore GX | | Brakes | Antilock Brake System |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5083309

DTC P0856
Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC P0856 Traction Control Torque Request Circuit

Symptom Byte Information: Symptom Byte List

Circuit/System Description

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For an overview of the component/system, refer to: ABS Description and Operation

Conditions for Running the DTC

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Engine Running — Gasoline /Diesel
Propulsion Active — Hybrid /EV
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Conditions for Setting the DTC

When certain DTCs are set in the engine control module, it will not be able to perform torque
reduction for traction control. A serial data message is sent to the electronic brake control module
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indicating that torque reduction is currently not allowed.

Actions Taken When the DTC Sets

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Traction/Stability Control Indicator = ON

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Conditions for Clearing the DTC

The conditions for setting the DTC no longer exist.

A history DTC will clear after 40 consecutive malfunction-free ignition cycles.

Reference Information
Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

Master Electrical Component List

Electrical Information Reference

Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs
© 2023 General Motors. All rights reserved.

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4/26/23, 11:00 AM DTC P0856

Scan Tool Reference

Control Module References

Circuit/System Verification

1. Verify there are no other DTCs set, except for DTC P0856.
⇒ If any other DTCs are set
Refer to: Diagnostic Trouble Code (DTC) List - Vehicle
⇓ If no other DTCs are set
2. Replace the component: K20 Engine Control Module
3. Under normal operating conditions: Verify that no DTCs are set.
⇒ If the DTC sets
Replace the appropriate component: K160 Brake System Control Module or K17 Electronic
Brake Control Module
⇓ If no DTC is set
4. All OK.

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Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
Verification

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For control module replacement, programming, and setup refer to: Control Module References
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4/26/23, 11:02 AM DTC U3002

2022 Buick Encore GX | | Brakes | Antilock Brake System |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5088855

DTC U3002
Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC U3002 Vehicle Identification Number Incorrect

Symptom Byte Information: Symptom Byte List

Circuit/System Description

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For an overview of the component/system, refer to: ABS Description and Operation

Conditions for Running the DTC

Ignition/Vehicle = ON

Conditions for Setting the DTC

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VIN Not Programmed

Actions Taken When the DTC Sets

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ABS Warning Indicator = OFF

Conditions for Clearing the DTC

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The conditions for setting the DTC no longer exist.

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Reference Information
Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

Master Electrical Component List

Electrical Information Reference

Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs

Scan Tool Reference

Control Module References

Circuit/System Verification© 2023 General Motors. All rights reserved.

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4/26/23, 11:02 AM DTC U3002

1. Ignition » On / Vehicle » In Service Mode

2. Verify DTC U3002 is not set.
⇒ If the DTC is set
2.1. Perform all necessary programming and setup procedures for the control module: K160
Brake System Control Module
2.2. Verify the DTC does not set.
⇒ If the DTC sets » Replace the component: K160 Brake System Control Module
⇓ If the DTC is not set
2.3. All OK.
⇓ If the DTC is not set
3. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair
Verification

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For control module replacement, programming, and setup refer to: Control Module References

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4/26/23, 11:07 AM Electronic Parking Brake Description

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Park Brake | Description and Operation |
Document ID: 3961302

Electronic Parking Brake Description

Vehicles with the electric parking brake have a switch in the center console or on the dash, which takes
the place of the manual parking brake system, the foot pedal and release handle. In case of insufficient
electrical power, the electric parking brake cannot be applied or released.

Electronic Brake Control Module/Brake System Control Module

The parking brake function is integrated into the Electronic Brake Control Module/Brake System
Control Module. The module contains the logic for applying and releasing the parking brake when
commanded by the Park Brake Switch.

When the Park Brake Switch is pulled, a signal is sent to the Electronic Brake Control Module
which will supply 12 V to the apply control circuits and ground to the release control circuits which
will cause the left and right park brake actuators to activate causing the park brakes to engage.
When the Park Brake Switch is pressed, a signal is sent to the Electronic Brake Control Module
which will supply 12 V to the released control circuits and ground to the apply control circuits

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which will cause the left and right park brake actuators to activate causing the park brakes to
release. In some vehicles, the Park Brake Switch is a push-button style switch. When the switch is
pressed, the park brakes are commanded to either apply or release based off of their current
position.

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The Electronic Brake Control Module/Brake System Control Module will diagnose the park brake
motor circuits to verify that they are functioning properly. The park brake motor circuits are used
to command actuator motor operation, which will apply and release the parking brake. These
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circuits are used to activate the actuator, which applies or releases pressure on the caliper
pistons, ultimately applying and releasing the park brake.

The Park Brake Motor Position Sensor is an internal sensor to the park brake actuator, this sensor
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is used to monitor the park brake motor position.

Electric Parking Brake Apply

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The electric parking brake can be applied any time the vehicle is stopped or in motion. The electric
parking brake is applied by momentarily operating the park brake control switch. The red park
brake light will momentarily flash while the parking brake is being applied. Once fully applied, the
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red park brake light will turn on. If the electric parking brake is applied while the vehicle is in
motion, the vehicle will decelerate as long as the switch is being operated. If the switch is
operated until the vehicle comes to a stop, the park brake will remain applied.

If the red park brake light is flashing, the electric parking brake is only partially applied or
released, or there is a problem with the electric parking brake. A DIC message will display.

The vehicle may automatically apply the electric parking brake in some situations when the
vehicle is not moving. This is normal, and is done to periodically check the correct operation of the
electric parking brake system.

Electric Parking Brake Release

To release the electric parking brake, turn the ignition switch to the ON or RUN position, apply and
hold the brake pedal, and push down momentarily on the park brake control switch. When the
electric parking brake is released the red park brake light turns off.

Automatic Electric Parking Brake Release

The parking brake will automatically release if the vehicle is running, placed into gear, and an
attempt is made to drive away. Avoid rapid acceleration when the parking brake is applied to
© 2023 General Motors. All rights reserved.

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4/26/23, 11:07 AM Electronic Parking Brake Description

preserve parking brake lining life.

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4/26/23, 11:04 AM Fastener Specifications

2022 Buick Encore GX | |

Encore GX Service Manual N America 14739426 Brakes | Disc Brakes | Specifications |
Document ID: 5286112

Fastener Specifications
Reusable Threaded Fastener Tightening Specifications

Specification

Application Metric (English)

Note: All fasteners listed in this table can be reused after removal.

Front Brake Caliper Bleeder Valve 10 Y (89 lb in)

Front Brake Caliper Bracket Bolt

First Pass: 150 Y (111 lb ft)

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Final Pass: 15 - 30 degrees

Front Brake Caliper Guide Pin Bolt

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Front Brake Hose Fitting Bolt 40 Y (30 lb ft)

Front Brake Rotor Bolt 9 Y (80 lb in)

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Rear Brake Bleeder Valve 17 Y (13 lb ft)

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Rear Brake Caliper Bracket Bolt 100 Y (74 lb ft)

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Rear Brake Caliper Guide Pin Bolt 40 Y (30 lb ft)

Rear Brake Hose Fitting Bolt 40 Y (30 lb ft)

Rear Brake Rotor Bolt 9 Y (80 lb in)

© 2023 General Motors. All rights reserved.

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4/26/23, 11:13 AM Fastener Specifications

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Hydraulic Brakes | Specifications |
Document ID: 5286113

Fastener Specifications
Table 1: Single Use Non-Threaded Fasteners/Components
Table 2: Reusable Threaded Fastener Tightening Specifications
Single Use Non-Threaded Fasteners/Components

Application

Note: All fasteners/components listed in this table MUST BE DISCARDED and replaced
with NEW after removal.

Brake Pedal Push Rod Retainer

Front Brake Hose Washer

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Rear Brake Hose Washer

Reusable Threaded Fastener Tightening Specifications

Specification

Application
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Note: All fasteners listed in this table can be reused after removal.

Brake and Accelerator Pedal Bracket Nut 22 Y (16 lb ft)

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Brake Master Cylinder Bracket Nut 9 Y (80 lb in)

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Brake Master Cylinder Reservoir Bolt 5 – 6 Y (44 - 53 lb in)

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Brake Master Cylinder Reservoir Bracket Nut 9 Y (80 lb in)

Brake Pipe Fitting 18 Y (13 lb ft)

Brake Pressure Modulator Valve Front Brake Pipe

18 Y (13 lb ft)
Fitting

Electronic Brake Control Module Bolt 3 Y (27 lb in)

Front Brake Hose Bracket Nut 9 Y (80 lb in)

Front Brake Hose Fitting Bolt 40 Y (30 lb ft)

Instrument Panel Tie Bar Bolt 22 Y (16 lb ft)

Rear Brake Hose Fitting Bolt 40 Y (30 lb ft)

© 2023 General Motors. All rights reserved.
R B k I t di t Pi Fitti 18 Y (13 lb ft)
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4/26/23, 11:13 AM Fastener Specifications

Rear Brake Intermediate Pipe Fitting 18 Y (13 lb ft)

Specification

Application Metric (English)

Rear Brake Pipe Fitting 18 Y (13 lb ft)

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4/26/23, 11:17 AM Fastener Specifications

2022 Buick Encore GX | Encore GX Service Manual N America 14739426 | Brakes | Park Brake | Specifications |
Document ID: 5236125

Fastener Specifications
Table 1: Single Use Non-Threaded Fasteners/Components
Table 2: Reusable Threaded Fastener Tightening Specifications
Single Use Non-Threaded Fasteners/Components

Note: All fasteners/components listed in this table MUST BE DISCARDED and replaced
with NEW after removal.

Application

Parking Brake Actuator Seal

Reusable Threaded Fastener Tightening Specifications

Note: All fasteners listed in this table can be reused after removal.

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Specification

Application Metric (English)

Parking Brake Actuator Bolt Bolt

.c 11.5 Y (102 lb in)
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4/26/23, 11:04 AM Fastener Specifications

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Antilock Brake System | Specifications |
Document ID: 5286111

Fastener Specifications
Reusable Threaded Fastener Tightening Specifications

Specification

Application Metric (English)

Note: All fasteners listed in this table can be reused after removal.

Front Wheel Speed Sensor Bolt 9 Y (80 lb in)

Rear Wheel Speed Sensor Bolt 9 Y (80 lb in)

Wheel Speed Sensor Bracket Nut 9 Y (80 lb in)

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Wheel Speed Sensor Wire Bracket Bolt 9 Y (80 lb in)

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© 2023 General Motors. All rights reserved.

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4/26/23, 10:23 AM Front Brake Caliper Bleeder Valve Replacement

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Disc Brakes | Repair Instructions |
Document ID: 5236076

Front Brake Caliper Bleeder Valve Replacement

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Front Brake Caliper Bleeder Valve Replacement
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Callout Component Name

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Warning: The battery must be disconnected to prevent the brake master cylinder from
pressurizing the hydraulic system during its automated self diagnostic tests that can
possibly occur when a door is opened or the key transmitter is activated. Failure to
follow this precaution may cause personal injury.
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Warning: Brake Dust Warning

Warning: Brake Fluid Irritant Warning
Caution: Brake Fluid Effects on Paint and Electrical Components Caution
Preliminary Procedures

1. Disconnect the battery negative cable. Battery Negative Cable Disconnection and Connection
2. Raise and support the vehicle. Lifting and Jacking the Vehicle.
3. Remove the front tire and wheel assembly. Tire and Wheel Removal and Installation

1 Front Brake Caliper Bleeder Valve Cap

2 Front Brake Caliper Bleeder Valve

Caution: Fastener Caution
Tighten
10 Y (89 lb in)
Procedure
© 2023 General Motors. All rights reserved.

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4/26/23, 10:23 AM Front Brake Caliper Bleeder Valve Replacement

Callout Component Name

1. Install the front tire and wheel assembly. Tire and Wheel Removal and
Installation
2. Connect the battery negative cable. Battery Negative Cable Disconnection and
Connection

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© 2023 General Motors. All rights reserved.

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4/26/23, 10:31 AM Front Brake Caliper Bracket Replacement (JBP)

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Disc Brakes | Repair Instructions |
Document ID: 5380885

Front Brake Caliper Bracket Replacement (JBP)

Removal Procedure

Warning: The battery must be disconnected to prevent the brake master cylinder from
pressurizing the hydraulic system during its automated self diagnostic tests that can
possibly occur when a door is opened or the key transmitter is activated. Failure to
follow this precaution may cause personal injury.

Warning: Brake Dust Warning

1. Set the parking brake in service mode. Parking Brake Service Mode Selection
2. Disconnect the battery negative cable. Battery Negative Cable Disconnection and Connection
3. Raise and support the vehicle. Lifting and Jacking the Vehicle.
4. Remove the front tire and wheel assembly. Tire and Wheel Removal and Installation

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Note: If installing new front disc brake pads, a NEW sensor must be installed.
5. Front Disc Brake Pad Wear Sensor (1) @ Vehicle » Remove — Front Disc Brake Pad Wear
Sensor Replacement

© 2023 General Motors. All rights reserved.

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4/26/23, 10:31 AM Front Brake Caliper Bracket Replacement (JBP)

6. Electrical Connector (1) @ Parking Brake Actuator » Disconnect

7. Parking Brake Actuator Harness Retainer (2) » Release

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Note: .c
Do NOT use air or power tools to remove or install the brake caliper guide pin bolts.
Use hand tools ONLY.
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Install an open end wrench to hold the caliper guide pin in line with the brake caliper
while removing or installing the caliper guide pin bolt. Allowing the open end wrench
to come in contact with the brake caliper will cause a pulsation when the brakes are
applied.
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8. Front Brake Caliper Guide Pin Bolt (1) » Remove [2x]

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Caution: Support the brake caliper with heavy mechanic wire, or equivalent, whenever it is
separated from its mount and the hydraulic flexible brake hose is still connected.
Failure to support the caliper in this manner will cause the flexible brake hose to
bear the weight of the caliper, which may cause damage to the brake hose and in
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turn may cause a brake fluid leak.

9. Remove the front brake caliper (2) from the front brake caliper bracket and support the front
brake caliper (2) with heavy mechanic’s wire, or equivalent. Do NOT disconnect the hydraulic
brake flexible hose from the caliper.

© 2023 General Motors. All rights reserved.

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4/26/23, 10:31 AM Front Brake Caliper Bracket Replacement (JBP)

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10. Front Disc Brake Inner Pad (1) @ Front Brake Caliper Bracket (3) » Remove
11. Front Disc Brake Outer Pad (2) @ Front Brake Caliper Bracket (3) » Remove

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12. Front Disc Brake Pad Retaining Spring (1) @ Front Brake Caliper Bracket (2) » Remove and
DISCARD [4x]

© 2023 General Motors. All rights reserved.

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4/26/23, 10:31 AM Front Brake Caliper Bracket Replacement (JBP)

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13. Front Brake Caliper Bracket Bolt (1) » Remove [2x]
14. Front Brake Caliper Bracket (2) @ Steering Knuckle » Remove

Installation Procedure

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1. Prepare the front brake caliper bracket bolts for installation as follows:
1.1. Remove any loose cured adhesive from the external threads of the component using a
lint free cloth.
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1.2. Thread the cleaned components into the internal mating threads and remove to loosen
trapped cured adhesive.
1.3. Apply thread locking adhesive to the external threads of the components.
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1.4. Ensure there are no gaps in the thread locking adhesive once applied to the component.
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2. Front Brake Caliper Bracket (2) @ Steering Knuckle » Install

Caution: Fastener Caution
3. Front Brake Caliper Bracket
© 2023Bolt (1) »Motors.
General Install and tighten
All rights [2x]
reserved.

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4/26/23, 10:31 AM Front Brake Caliper Bracket Replacement (JBP)

3.1. First Pass: 150 Y (111 lb ft)

3.2. Final Pass: 15–30 degrees

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4. Front Disc Brake Pad Retaining Spring (1) @ Front Brake Caliper Bracket (2) » Install NEW
[4x]
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5. Front Disc Brake Outer Pad (2) @ Front Brake Caliper Bracket (3) » Install
6. Front Disc Brake Inner Pad (1) @ Front Brake Caliper Bracket (3) » Install

© 2023 General Motors. All rights reserved.

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4/26/23, 10:31 AM Front Brake Caliper Bracket Replacement (JBP)

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7. Remove the support and reposition the front brake caliper (2) over the brake pads and to the
front brake caliper bracket.
Note: Install an open end wrench to hold the caliper guide pin in line with the brake caliper
while removing or installing the caliper guide pin bolt.
8. Front Brake Caliper Guide Pin Bolt (1) » Install and tighten [2x] 40 Y (30 lb ft)
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9. Parking Brake Actuator Harness Retainer (2) » Install

10. Electrical Connector (1) @ Parking Brake Actuator » Connect

© 2023 General Motors. All rights reserved.

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4/26/23, 10:31 AM Front Brake Caliper Bracket Replacement (JBP)

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Note: If installing new front disc brake pads, a NEW sensor must be installed.
11. Front Disc Brake Pad Wear Sensor (1) @ Vehicle » Install — Front Disc Brake Pad Wear Sensor
Replacement
12. Install the front tire and wheel assembly. Tire and Wheel Removal and Installation
13. Lower the vehicle. .c
14. Connect the battery negative cable. Battery Negative Cable Disconnection and Connection
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15. Calibrate the park brake. Park Brake Calibration
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© 2023 General Motors. All rights reserved.

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4/26/23, 10:31 AM Front Brake Caliper Bracket Replacement

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Disc Brakes | Repair Instructions |
Document ID: 5236081

Front Brake Caliper Bracket Replacement

Removal Procedure

Warning: The battery must be disconnected to prevent the brake master cylinder from
pressurizing the hydraulic system during its automated self diagnostic tests that can
possibly occur when a door is opened or the key transmitter is activated. Failure to
follow this precaution may cause personal injury.

Warning: Brake Dust Warning

1. Set the parking brake in service mode. Parking Brake Service Mode Selection
2. Disconnect the battery negative cable. Battery Negative Cable Disconnection and Connection
3. Raise and support the vehicle. Lifting and Jacking the Vehicle.
4. Remove the front tire and wheel assembly. Tire and Wheel Removal and Installation

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5. Electrical Connector (1) @ Parking Brake Actuator » Disconnect

6. Parking Brake Actuator Harness Retainer (2) » Release

© 2023 General Motors. All rights reserved.

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4/26/23, 10:31 AM Front Brake Caliper Bracket Replacement

Note:
Do NOT use air or power tools to remove or install the brake caliper guide pin bolts.
Use hand tools ONLY.
Install an open end wrench to hold the caliper guide pin in line with the brake caliper
while removing or installing the caliper guide pin bolt. Allowing the open end wrench
to come in contact with the brake caliper will cause a pulsation when the brakes are
applied.
7. Front Brake Caliper Guide Pin Bolt (1) » Remove [2x]
Caution: Support the brake caliper with heavy mechanic wire, or equivalent, whenever it is
separated from its mount and the hydraulic flexible brake hose is still connected.
Failure to support the caliper in this manner will cause the flexible brake hose to
bear the weight of the caliper, which may cause damage to the brake hose and in
turn may cause a brake fluid leak.
8. Remove the front brake caliper (2) from the front brake caliper bracket and support the front
brake caliper (2) with heavy mechanic’s wire, or equivalent. Do NOT disconnect the hydraulic
brake flexible hose from the caliper.

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9. Front Disc Brake Inner Pad (1) @ Front Brake Caliper Bracket (3) » Remove
10. Front Disc Brake Outer Pad (2) @ Front Brake Caliper Bracket (3) » Remove

© 2023 General Motors. All rights reserved.

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4/26/23, 10:31 AM Front Brake Caliper Bracket Replacement

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11. Front Disc Brake Pad Retaining Spring (1) @ Front Brake Caliper Bracket (2) » Remove and
DISCARD [4x]

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12. Front Brake Caliper Bracket Bolt (1) » Remove [2x]

13. Front Brake Caliper Bracket (2) @ Steering Knuckle » Remove

Installation Procedure

1. Prepare the front brake caliper bracket bolts for installation as follows:
1.1. Remove any loose cured adhesive from the external threads of the component using a
lint free cloth.
1.2. Thread the cleaned components into the internal mating threads and remove to loosen
trapped cured adhesive.
1.3. Apply thread locking adhesive to the external threads of the components.
1.4. Ensure there are no gaps in the thread locking adhesive once applied to the component.
© 2023 General Motors. All rights reserved.

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4/26/23, 10:31 AM Front Brake Caliper Bracket Replacement

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2. Front Brake Caliper Bracket (2) @ Steering Knuckle » Install
Caution: Fastener Caution
3. Front Brake Caliper Bracket Bolt (1) » Install and tighten [2x]
3.1. First Pass: 150 Y (111 lb ft)
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3.2. Final Pass: 15–30 degrees
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4. Front Disc Brake Pad Retaining Spring (1) @ Front Brake Caliper Bracket (2) » Install NEW
[4x]

© 2023 General Motors. All rights reserved.

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4/26/23, 10:31 AM Front Brake Caliper Bracket Replacement

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5. Front Disc Brake Outer Pad (2) @ Front Brake Caliper Bracket (3) » Install
6. Front Disc Brake Inner Pad (1) @ Front Brake Caliper Bracket (3) » Install

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7. Remove the support and reposition the front brake caliper (2) over the brake pads and to the
front brake caliper bracket.
Note: Install an open end wrench to hold the caliper guide pin in line with the brake caliper
while removing or installing the caliper guide pin bolt.
8. Front Brake Caliper Guide Pin Bolt (1) » Install and tighten [2x] 36.5 Y (27 lb ft)

© 2023 General Motors. All rights reserved.

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4/26/23, 10:31 AM Front Brake Caliper Bracket Replacement

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9. Parking Brake Actuator Harness Retainer (2) » Install
10. Electrical Connector (1) @ Parking Brake Actuator » Connect
11. Install the front tire and wheel assembly. Tire and Wheel Removal and Installation
12. Lower the vehicle.
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13. Connect the battery negative cable. Battery Negative Cable Disconnection and Connection
14. Calibrate the park brake. Park Brake Calibration
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© 2023 General Motors. All rights reserved.

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4/26/23, 10:25 AM Front Brake Caliper Guide Pin Replacement (JBP)

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Disc Brakes | Repair Instructions |
Document ID: 5380888

Front Brake Caliper Guide Pin Replacement (JBP)

Removal Procedure

Warning: The battery must be disconnected to prevent the brake master cylinder from
pressurizing the hydraulic system during its automated self diagnostic tests that can
possibly occur when a door is opened or the key transmitter is activated. Failure to
follow this precaution may cause personal injury.

Warning: Brake Dust Warning

1. Set the parking brake in service mode. Parking Brake Service Mode Selection
2. Disconnect the battery negative cable. Battery Negative Cable Disconnection and Connection
3. Raise and support the vehicle. Lifting and Jacking the Vehicle.
4. Remove the front tire and wheel assembly. Tire and Wheel Removal and Installation

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Note: If installing new front disc brake pads, a NEW sensor must be installed.
5. Front Disc Brake Pad Wear Sensor (1) @ Vehicle » Remove — Front Disc Brake Pad Wear
Sensor Replacement

© 2023 General Motors. All rights reserved.

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4/26/23, 10:25 AM Front Brake Caliper Guide Pin Replacement (JBP)

6. Electrical Connector (1) @ Parking Brake Actuator » Disconnect

7. Parking Brake Actuator Harness Retainer (2) » Release

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Note: .c
Do NOT use air or power tools to remove or install the brake caliper guide pin bolts.
Use hand tools ONLY.
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Install an open end wrench to hold the caliper guide pin in line with the brake caliper
while removing or installing the caliper guide pin bolt. Allowing the open end wrench
to come in contact with the brake caliper will cause a pulsation when the brakes are
applied.
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8. Front Brake Caliper Guide Pin Bolt (1) » Remove [2x]

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Caution: Support the brake caliper with heavy mechanic wire, or equivalent, whenever it is
separated from its mount and the hydraulic flexible brake hose is still connected.
Failure to support the caliper in this manner will cause the flexible brake hose to
bear the weight of the caliper, which may cause damage to the brake hose and in
ca

turn may cause a brake fluid leak.

9. Remove the front brake caliper (2) from the front brake caliper bracket and support the front
brake caliper (2) with heavy mechanic’s wire, or equivalent. Do NOT disconnect the hydraulic
brake flexible hose from the caliper.

© 2023 General Motors. All rights reserved.

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4/26/23, 10:25 AM Front Brake Caliper Guide Pin Replacement (JBP)

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10. Front Brake Caliper Guide Pin (1) » Remove [2x]
11. Front Brake Caliper Guide Pin Seal (2) » Remove [2x]

Installation Procedure

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1. Front Brake Caliper Guide Pin Seal (2) » Install [2x]

2. Front Brake Caliper Guide Pin (1) » Install [2x]

© 2023 General Motors. All rights reserved.

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4/26/23, 10:25 AM Front Brake Caliper Guide Pin Replacement (JBP)

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3. Remove the support and reposition the front brake caliper (2) over the brake pads and to the
front brake caliper bracket.
Caution: Fastener Caution
Note: Install an open end wrench to hold the caliper guide pin in line with the brake caliper
while removing or installing the caliper guide pin bolt.
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4. Front Brake Caliper Guide Pin Bolt (1) » Install and tighten [2x] 36.5 Y (27 lb ft)
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5. Parking Brake Actuator Harness Retainer (2) » Install

6. Electrical Connector (1) @ Parking Brake Actuator » Connect

© 2023 General Motors. All rights reserved.

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4/26/23, 10:25 AM Front Brake Caliper Guide Pin Replacement (JBP)

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Note: If installing new front disc brake pads, a NEW sensor must be installed.
7. Front Disc Brake Pad Wear Sensor (1) @ Vehicle » Install — Front Disc Brake Pad Wear Sensor
Replacement
8. Install the front tire and wheel assembly. Tire and Wheel Removal and Installation
9. Lower the vehicle. .c
10. Connect the battery negative cable. Battery Negative Cable Disconnection and Connection
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11. Calibrate the park brake. Park Brake Calibration
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© 2023 General Motors. All rights reserved.

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4/26/23, 10:24 AM Front Brake Caliper Guide Pin Replacement

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Disc Brakes | Repair Instructions |
Document ID: 5236077

Front Brake Caliper Guide Pin Replacement

Removal Procedure

Warning: The battery must be disconnected to prevent the brake master cylinder from
pressurizing the hydraulic system during its automated self diagnostic tests that can
possibly occur when a door is opened or the key transmitter is activated. Failure to
follow this precaution may cause personal injury.

Warning: Brake Dust Warning

1. Set the parking brake in service mode. Parking Brake Service Mode Selection
2. Disconnect the battery negative cable. Battery Negative Cable Disconnection and Connection
3. Raise and support the vehicle. Lifting and Jacking the Vehicle.
4. Remove the front tire and wheel assembly. Tire and Wheel Removal and Installation

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5. Electrical Connector (1) @ Parking Brake Actuator » Disconnect

6. Parking Brake Actuator Harness Retainer (2) » Release

© 2023 General Motors. All rights reserved.

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4/26/23, 10:24 AM Front Brake Caliper Guide Pin Replacement

Note:
Do NOT use air or power tools to remove or install the brake caliper guide pin bolts.
Use hand tools ONLY.
Install an open end wrench to hold the caliper guide pin in line with the brake caliper
while removing or installing the caliper guide pin bolt. Allowing the open end wrench
to come in contact with the brake caliper will cause a pulsation when the brakes are
applied.
7. Front Brake Caliper Guide Pin Bolt (1) » Remove [2x]
Caution: Support the brake caliper with heavy mechanic wire, or equivalent, whenever it is
separated from its mount and the hydraulic flexible brake hose is still connected.
Failure to support the caliper in this manner will cause the flexible brake hose to
bear the weight of the caliper, which may cause damage to the brake hose and in
turn may cause a brake fluid leak.
8. Remove the front brake caliper (2) from the front brake caliper bracket and support the front
brake caliper (2) with heavy mechanic’s wire, or equivalent. Do NOT disconnect the hydraulic
brake flexible hose from the caliper.

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9. Front Brake Caliper Guide Pin (1) » Remove [2x]

10. Front Brake Caliper Guide Pin Seal (2) » Remove [2x]

Installation Procedure

© 2023 General Motors. All rights reserved.

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4/26/23, 10:24 AM Front Brake Caliper Guide Pin Replacement

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1. Front Brake Caliper Guide Pin Seal (2) » Install [2x]
2. Apply a light coat of high temperature silicone brake lubricant to the caliper guide pins.
3. Front Brake Caliper Guide Pin (1) » Install [2x]

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4. Remove the support and reposition the front brake caliper (2) over the brake pads and to the
front brake caliper bracket.
Caution: Fastener Caution
Note: Install an open end wrench to hold the caliper guide pin in line with the brake caliper
while removing or installing the caliper guide pin bolt.
5. Front Brake Caliper Guide Pin Bolt (1) » Install and tighten [2x] 36.5 Y (27 lb ft)

© 2023 General Motors. All rights reserved.

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4/26/23, 10:24 AM Front Brake Caliper Guide Pin Replacement

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6. Parking Brake Actuator Harness Retainer (2) » Install
7. Electrical Connector (1) @ Parking Brake Actuator » Connect
8. Install the front tire and wheel assembly. Tire and Wheel Removal and Installation
9. Lower the vehicle.
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10. Connect the battery negative cable. Battery Negative Cable Disconnection and Connection
11. Calibrate the park brake. Park Brake Calibration
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© 2023 General Motors. All rights reserved.

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4/26/23, 10:22 AM Front Brake Caliper Replacement (JBP)

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Disc Brakes | Repair Instructions |
Document ID: 5380883

Front Brake Caliper Replacement (JBP)

Removal Procedure

Warning: The battery must be disconnected to prevent the brake master cylinder from
pressurizing the hydraulic system during its automated self diagnostic tests that can
possibly occur when a door is opened or the key transmitter is activated. Failure to
follow this precaution may cause personal injury.

Warning: Brake Dust Warning

Warning: Brake Fluid Irritant Warning

Caution: Brake Fluid Effects on Paint and Electrical Components Caution

1. Set the parking brake in service mode. Parking Brake Service Mode Selection
2. Disconnect the battery negative cable. Battery Negative Cable Disconnection and Connection

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3. Raise and support the vehicle. Lifting and Jacking the Vehicle.
4. Remove the front tire and wheel assembly. Tire and Wheel Removal and Installation

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Note: If installing new front disc brake pads, a NEW sensor must be installed.
5. Front Disc Brake Pad Wear Sensor (1) @ Vehicle » Remove — Front Disc Brake Pad Wear
Sensor Replacement

© 2023 General Motors. All rights reserved.

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4/26/23, 10:22 AM Front Brake Caliper Replacement (JBP)

6. Electrical Connector (1) @ Parking Brake Actuator » Disconnect

7. Parking Brake Actuator Harness Retainer (2) » Release

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8. Front Brake Hose Fitting Bolt (1) @ Front Brake Caliper » Remove
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9. Front Brake Hose (2) @ Front Brake Caliper » Remove
10. Front Brake Hose Washer (3) » Remove and DISCARD [2x]
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These washers may be stuck to the brake caliper and/or the brake hose end.
11. Cap the opening in the brake caliper and the brake hose to prevent fluid loss and
contamination.
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rd
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Note:
Do NOT use air or power tools to remove or install the brake caliper guide pin bolts.
Use hand tools ONLY.
© 2023 General Motors. All rights reserved.

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4/26/23, 10:22 AM Front Brake Caliper Replacement (JBP)

Install an open end wrench to hold the caliper guide pin in line with the brake caliper
while removing or installing the caliper guide pin bolt. Allowing the open end wrench
to come in contact with the brake caliper will cause a pulsation when the brakes are
applied.
12. Front Brake Caliper Guide Pin Bolt (1) » Remove [2x]
13. Front Brake Caliper (2) @ Front Brake Caliper Bracket » Remove

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14. Parking Brake Actuator Bolt (1) » Remove

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15. Parking Brake Actuator (2) » Remove

16. Parking Brake Actuator Seal (3) » Remove and DISCARD
17. Inspect the brake caliper guide pins for freedom of movement, and inspect the condition of
the guide pin boots. Move the guide pins inboard and outboard within the bracket bores,
without disengaging the slides from the boots, and observe for the following:
Restricted caliper guide pin movement
Looseness in the brake caliper mounting bracket
Seized or binding caliper guide pins
Split or torn boots
18. If any of the conditions listed are found, the brake caliper guide pins and/or boots require
replacement.

Installation Procedure

© 2023 General Motors. All rights reserved.

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4/26/23, 10:22 AM Front Brake Caliper Replacement (JBP)

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1. Parking Brake Actuator Seal (3) » Install NEW
2. Parking Brake Actuator (2) » Install
3. Parking Brake Actuator Bolt (1) » Install — Parking Brake Actuator Replacement
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4. Front Brake Caliper (2) @ Front Brake Caliper Bracket » Install

Caution: Fastener Caution
Note: Install an open end wrench to hold the caliper guide pin in line with the brake caliper
while removing© or
2023 General
installing Motors.
the caliper All rights
guide pin reserved.
bolt.

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4/26/23, 10:22 AM Front Brake Caliper Replacement (JBP)

5. Front Brake Caliper Guide Pin Bolt (1) » Install and tighten [2x] 36.5 Y (27 lb ft)

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6. Remove the caps from the brake caliper and the brake hose.
Note: Do not reuse the copper brake hose washers.
7. Front Brake Hose Washer (3) » Install NEW [2x]
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8. Front Brake Hose (2) @ Front Brake Caliper » Install
9. Front Brake Hose Fitting Bolt (1) @ Front Brake Caliper » Install and tighten 40 Y (30 lb ft)
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10. Parking Brake Actuator Harness Retainer (2) » Install

11. Electrical Connector (1) @ Parking Brake Actuator » Connect

© 2023 General Motors. All rights reserved.

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4/26/23, 10:22 AM Front Brake Caliper Replacement (JBP)

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Note: If installing new front disc brake pads, a NEW sensor must be installed.
12. Front Disc Brake Pad Wear Sensor (1) @ Vehicle » Install — Front Disc Brake Pad Wear Sensor
Replacement
13. Install the front tire and wheel assembly. Tire and Wheel Removal and Installation
.c
14. Connect the battery negative cable. Battery Negative Cable Disconnection and Connection
15. Bleed the brake system. Hydraulic Brake System Bleeding
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16. Lower the vehicle.
17. Fill the brake master cylinder reservoir to the maximum-full level with GM approved brake
fluid from a clean, sealed brake fluid container. Brake Master Cylinder Reservoir Filling
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18. Calibrate the park brake. Park Brake Calibration

rd
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© 2023 General Motors. All rights reserved.

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4/26/23, 10:21 AM Front Brake Caliper Replacement

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Disc Brakes | Repair Instructions |
Document ID: 5236075

Front Brake Caliper Replacement

Removal Procedure

Warning: The battery must be disconnected to prevent the brake master cylinder from
pressurizing the hydraulic system during its automated self diagnostic tests that can
possibly occur when a door is opened or the key transmitter is activated. Failure to
follow this precaution may cause personal injury.

Warning: Brake Dust Warning

Warning: Brake Fluid Irritant Warning

Caution: Brake Fluid Effects on Paint and Electrical Components Caution

1. Set the parking brake in service mode. Parking Brake Service Mode Selection
2. Disconnect the battery negative cable. Battery Negative Cable Disconnection and Connection

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3. Raise and support the vehicle. Lifting and Jacking the Vehicle.
4. Remove the front tire and wheel assembly. Tire and Wheel Removal and Installation

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5. Electrical Connector (1) @ Parking Brake Actuator » Disconnect

6. Parking Brake Actuator Harness Retainer (2) » Release

© 2023 General Motors. All rights reserved.

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4/26/23, 10:21 AM Front Brake Caliper Replacement

7. Front Brake Hose Fitting Bolt (1) @ Front Brake Caliper » Remove
8. Front Brake Hose (2) @ Front Brake Caliper » Remove
9. Front Brake Hose Washer (3) » Remove and DISCARD [2x]
These washers may be stuck to the brake caliper and/or the brake hose end.
10. Cap the opening in the brake caliper and the brake hose to prevent fluid loss and
contamination.

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Note:
Do NOT use air or power tools to remove or install the brake caliper guide pin bolts.
ia

Use hand tools ONLY.

Install an open end wrench to hold the caliper guide pin in line with the brake caliper
rd

while removing or installing the caliper guide pin bolt. Allowing the open end wrench
to come in contact with the brake caliper will cause a pulsation when the brakes are
applied.
ca

11. Front Brake Caliper Guide Pin Bolt (1) » Remove [2x]
12. Front Brake Caliper (2) @ Front Brake Caliper Bracket » Remove

© 2023 General Motors. All rights reserved.

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4/26/23, 10:21 AM Front Brake Caliper Replacement

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13. Parking Brake Actuator Bolt (1) » Remove
14. Parking Brake Actuator (2) » Remove
15. Parking Brake Actuator Seal (3) » Remove and DISCARD
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16. Inspect the brake caliper guide pins for freedom of movement, and inspect the condition of
the guide pin boots. Move the guide pins inboard and outboard within the bracket bores,
rd

without disengaging the slides from the boots, and observe for the following:
Restricted caliper guide pin movement
Looseness in the brake caliper mounting bracket
ca

Seized or binding caliper guide pins

Split or torn boots
17. If any of the conditions listed are found, the brake caliper guide pins and/or boots require
replacement.

Installation Procedure

© 2023 General Motors. All rights reserved.

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4/26/23, 10:21 AM Front Brake Caliper Replacement

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1. Parking Brake Actuator Seal (3) » Install NEW
2. Parking Brake Actuator (2) » Install
3. Parking Brake Actuator Bolt (1) » Install — Parking Brake Actuator Replacement
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4. Front Brake Caliper (2) @ Front Brake Caliper Bracket » Install

Caution: Fastener Caution
Note: Install an open end wrench to hold the caliper guide pin in line with the brake caliper
while removing© or
2023 General
installing Motors.
the caliper All rights
guide pin reserved.
bolt.

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4/26/23, 10:21 AM Front Brake Caliper Replacement

5. Front Brake Caliper Guide Pin Bolt (1) » Install and tighten [2x] 36.5 Y (27 lb ft)

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6. Remove the caps from the brake caliper and the brake hose.
Note: Do not reuse the copper brake hose washers.
7. Front Brake Hose Washer (3) » Install NEW [2x]
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8. Front Brake Hose (2) @ Front Brake Caliper » Install
9. Front Brake Hose Fitting Bolt (1) @ Front Brake Caliper » Install and tighten 40 Y (30 lb ft)
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10. Parking Brake Actuator Harness Retainer (2) » Install

11. Electrical Connector (1) @ Parking Brake Actuator » Connect
12. Install the front tire and wheel assembly. Tire and Wheel Removal and Installation
13. Connect the battery negative cable. Battery Negative Cable Disconnection and Connection
14. Bleed the brake system. Hydraulic Brake System Bleeding
15. Lower the vehicle. © 2023 General Motors. All rights reserved.

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4/26/23, 10:21 AM Front Brake Caliper Replacement

16. Fill the brake master cylinder reservoir to the maximum-full level with GM approved brake
fluid from a clean, sealed brake fluid container. Brake Master Cylinder Reservoir Filling
17. Calibrate the park brake. Park Brake Calibration

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© 2023 General Motors. All rights reserved.

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4/26/23, 11:11 AM Front Brake Hose Replacement

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Hydraulic Brakes | Repair Instructions |
Document ID: 5236976

Front Brake Hose Replacement

Removal Procedure

Warning: The battery must be disconnected to prevent the brake master cylinder from
pressurizing the hydraulic system during its automated self diagnostic tests that can
possibly occur when a door is opened or the key transmitter is activated. Failure to
follow this precaution may cause personal injury.

Warning: Brake Fluid Irritant Warning

Caution: Brake Fluid Effects on Paint and Electrical Components Caution

1. Disconnect the battery negative cable. Battery Negative Cable Disconnection and Connection
2. Raise and support the vehicle. Lifting and Jacking the Vehicle.
3. Remove the front tire and wheel assembly. Tire and Wheel Removal and Installation

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4. Clean all dirt and foreign material from the brake hose ends and the brake pipe fitting.

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5. Brake Pressure Modulator Valve Front Brake Pipe Fitting (1) @ Front Brake Hose (3) » Remove
6. Cap the brake pipe fitting to prevent brake fluid loss and contamination.
7. Front Brake Hose Retainer (2) » Remove

© 2023 General Motors. All rights reserved.

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4/26/23, 11:11 AM Front Brake Hose Replacement

8. Front Brake Hose Bracket Nut (1) » Remove

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9. Front Brake Hose Fitting Bolt (1) @ Front Brake Caliper » Remove
10. Front Brake Hose (2) @ Front Brake Caliper » Remove
11. Front Brake Hose Washer (3) » Remove and DISCARD [2x]
These washers may be stuck to the brake caliper and/or the brake hose end.

Installation Procedure

© 2023 General Motors. All rights reserved.

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4/26/23, 11:11 AM Front Brake Hose Replacement

Note: Do NOT reuse the brake hose washers.

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1. Front Brake Hose Washer (3) » Install NEW [2x]
2. Front Brake Hose (2) @ Front Brake Caliper » Install
Caution: Fastener Caution
3. Front Brake Hose Fitting Bolt (1) @ Front Brake Caliper » Install and tighten 40 Y (30 lb ft)
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4. Front Brake Hose Bracket Nut (1) » Install and tighten 9 Y (80 lb in)

© 2023 General Motors. All rights reserved.

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4/26/23, 11:11 AM Front Brake Hose Replacement

5. Front Brake Hose Retainer (2) » Install

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6. Brake Pressure Modulator Valve Front Brake Pipe Fitting (1) @ Front Brake Hose (3) » Install
and tighten 18 Y (13 lb ft)
7. Install the front tire and wheel assembly. Tire and Wheel Removal and Installation
8. Connect the battery negative cable. Battery Negative Cable Disconnection and Connection
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9. Bleed the brake system. Hydraulic Brake System Bleeding
10. Lower the vehicle.
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11. Fill the brake master cylinder reservoir to the maximum-full level with GM approved brake
fluid from a clean, sealed brake fluid container. Brake Master Cylinder Reservoir Filling
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4/26/23, 10:32 AM Front Brake Rotor Replacement

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Disc Brakes | Repair Instructions |
Document ID: 5236083

Front Brake Rotor Replacement

Special Tools

CH-41013 Rotor Resurfacing Kit

CH-42450-A Wheel Hub Resurfacing Kit

For equivalent regional tools, refer to Special Tools.

Removal Procedure

Warning: The battery must be disconnected to prevent the brake master cylinder from
pressurizing the hydraulic system during its automated self diagnostic tests that can
possibly occur when a door is opened or the key transmitter is activated. Failure to
follow this precaution may cause personal injury.

Warning: Brake Dust Warning

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1. Set the parking brake in service mode. Parking Brake Service Mode Selection
2. Disconnect the battery negative cable. Battery Negative Cable Disconnection and Connection
3. Raise and support the vehicle. Lifting and Jacking the Vehicle.
4. Remove the front tire and wheel assembly. Tire and Wheel Removal and Installation
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5. Front Brake Caliper Bracket » Remove — Front Brake Caliper Bracket Replacement
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6. Front Brake Rotor Bolt (1) » Remove

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4/26/23, 10:32 AM Front Brake Rotor Replacement

7. Front Brake Rotor (1) @ Front Wheel Hub (2) » Remove

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Installation Procedure

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Note: Whenever the brake rotor has been separated from the hub/axle flange, any rust or
contaminants should be cleaned from the hub/axle flange and the brake rotor mating
surfaces. Failure to do this may result in excessive assembled lateral runout (LRO) of
the brake rotor, which could lead to brake pulsation.
1. Using the CH-42450-A Wheel Hub Resurfacing Kit, thoroughly clean any rust or corrosion from
the mating surface of the hub flange (1).
2. Using the CH-41013 Rotor Resurfacing Kit, thoroughly clean any rust or corrosion from the
mating surface of the rotor (2).
3. Inspect the mating surfaces of the hub/axle flange and the rotor to ensure that there are no
foreign particles or debris remaining.

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4/26/23, 10:32 AM Front Brake Rotor Replacement

4. Front Brake Rotor (1) @ Front Wheel Hub (2) » Install

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Caution: Fastener Caution

5. Front Brake Rotor Bolt (1) » Install and tighten 9 Y (80 lb in)
6. Front Brake Caliper Bracket » Install — Front Brake Caliper Bracket Replacement
7. Install the front tire and wheel assembly. Tire and Wheel Removal and Installation
8. Lower the vehicle.
9. Connect the battery negative cable. Battery Negative Cable Disconnection and Connection
10. With the vehicle OFF, gradually apply the brake pedal to approximately 2/3 of its travel
distance.
11. Slowly release the brake pedal.
12. Wait 15 seconds, then gradually apply the brake pedal approximately 2/3 of its travel distance
again until a firm brake pedal apply is obtained. This will properly seat the brake caliper
pistons and brake pads.
13. Inspect the fluid level in the brake master cylinder reservoir.
14. Calibrate the park brake. Park Brake Calibration
15. Burnish the brake pads and rotors.
© 2023 GeneralBrake Pad All
Motors. andrights
Rotorreserved.
Burnishing

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4/26/23, 10:32 AM Front Brake Rotor Replacement

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4/26/23, 10:33 AM Front Brake Shield Replacement

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Disc Brakes | Repair Instructions |
Document ID: 5236085

Front Brake Shield Replacement

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Front Brake Shield Replacement
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Callout Component Name

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Warning: Refer to Brake Dust Warning.

Preliminary Procedures

1. Raise and support the vehicle. Lifting and Jacking the Vehicle.
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2. Remove the front tire and wheel assembly. Tire and Wheel Removal and Installation
3. Front Wheel Bearing and Hub Replacement

1 Front Brake Shield

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4/26/23, 10:44 AM Front Disc Brake Mounting and Hardware Inspection

2022 Buick Encore GX | | Brakes | Disc Brakes |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5236092

Front Disc Brake Mounting and Hardware Inspection

Warning: Brake Dust Warning

1. Inspect the fluid level in the brake master cylinder reservoir.

2. If the brake fluid level is midway between the maximum–full point and the minimum allowable level
then no brake fluid needs to be removed from the reservoir before proceeding.
3. If the brake fluid level is higher than midway between the maximum–full point and the minimum
allowable level then remove brake fluid to the midway point before proceeding.
4. Set the parking brake in service mode. Parking Brake Service Mode Selection
5. Disconnect the battery negative cable. Battery Negative Cable Disconnection and Connection
6. Raise and support the vehicle. Lifting and Jacking the Vehicle
7. Remove the tire and wheel assembly. Tire and Wheel Removal and Installation
8. Grasp the brake caliper housing and try to move the brake caliper housing up/down and

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forward/reverse in relation to the brake caliper mounting bracket. If excessive looseness is observed
the brake caliper guide pins may need to be replaced.
Caution: Support the brake caliper with heavy mechanic wire, or equivalent, whenever it is
separated from its mount and the hydraulic flexible brake hose is still connected. Failure to
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support the caliper in this manner will cause the flexible brake hose to bear the weight of
the caliper, which may cause damage to the brake hose and in turn may cause a brake
fluid leak.
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9. Remove the brake caliper mounting bolts from the brake caliper mounting bracket and support the
brake caliper using heavy mechanics wire. Do Not remove the hydraulic brake hose from the caliper.
Front Brake Caliper Replacement
Note: When replacing the disc brake pads, maintain the same disc brake pad wear sensor
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orientation.
10. Remove the disc brake pads from the brake caliper mounting bracket.
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11. Inspect the disc brake pad mounting hardware for the following:
Missing mounting hardware
Excessive corrosion
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Bent mounting tabs

Looseness at the brake caliper mounting bracket
Looseness at the disc brake pads
Excessive contaminants in the brake caliper mounting bracket surface and threads.
12. If any of the conditions listed are found, the disc brake pad mounting hardware requires
replacement.
13. Ensure the disc brake pads are held firmly in place on the brake caliper mounting bracket, yet slide
easily on the mounting hardware without binding.

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4/26/23, 10:44 AM Front Disc Brake Mounting and Hardware Inspection

14. Inspect the brake caliper guide pin bolt (1), brake caliper (2), caliper bracket (3), and the guide pin
seal (4) for the following:

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Binding
Seizing
Looseness in the brake caliper mounting bracket
Bent or damaged brake caliper mounting bolts
Cracked or torn boots
Missing boots
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Bent or damaged brake caliper mounting bracket
15. If any of the conditions listed are found then the brake caliper mounting hardware requires
replacement.
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16. Using a commercial brake caliper piston retracting tool, carefully push back the brake caliper piston
until it is compressed completely into the caliper bore.
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17. Install the disc brake pads to the brake caliper mounting bracket. Front Disc Brake Pads
Replacement
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18. Install the disc brake caliper to the brake caliper mounting bracket. Front Brake Caliper Replacement
19. With the pistons compressed into the caliper bores, reinstall the brake caliper. Grasp the brake
caliper housing and slide it back and forth on the brake caliper mounting bolts. Check for smooth
operation. If the brake caliper housing slide force is high or the brake caliper housing does not slide
smoothly, inspect the brake caliper guide pins for wear or damage. If wear or damage conditions
are found, replacement of the brake caliper guide pins is necessary.
20. Install the tire and wheel assembly. Tire and Wheel Removal and Installation
21. Remove the supports and lower the vehicle.
22. Connect the battery negative cable. Battery Negative Cable Disconnection and Connection
23. Calibrate the park brake. Park Brake Calibration

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4/26/23, 10:15 AM Front Disc Brake Pad Wear Sensor Replacement

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Disc Brakes | Repair Instructions |
Document ID: 5380881

Front Disc Brake Pad Wear Sensor Replacement

Removal Procedure

1. Raise and support the vehicle. Lifting and Jacking the Vehicle
2. Remove the front tire and wheel assembly. Tire and Wheel Removal and Installation

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3. Electrical Connector (1) @ Front Disc Brake Pad Wear Sensor Harness » Disconnect
4. Front Disc Brake Pad Wear Sensor (2) @ Front Disc Brake Pad Wear Sensor Harness Clip »
Remove
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5. Front Disc Brake Pad Wear Sensor Clip (1) @ Front Brake Caliper » Remove
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4/26/23, 10:15 AM Front Disc Brake Pad Wear Sensor Replacement

6. Front Disc Brake Pad Wear Sensor (2) @ Front Disc Brake Pad » Remove

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7. Front Disc Brake Pad Wear Sensor (1) @ Vehicle » Remove

Installation Procedure
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1. Front Disc Brake Pad Wear Sensor (1) @ Vehicle » Install

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4/26/23, 10:15 AM Front Disc Brake Pad Wear Sensor Replacement

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2. Front Disc Brake Pad Wear Sensor (2) @ Front Disc Brake Pad » Install
3. Front Disc Brake Pad Wear Sensor Clip (1) @ Front Brake Caliper » Install

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4. Front Disc Brake Pad Wear Sensor (2) @ Front Disc Brake Pad Wear Sensor Harness Clip »
Install
5. Electrical Connector (1) @ Front Disc Brake Pad Wear Sensor Harness » Connect
6. Install the front tire and wheel assembly. Tire and Wheel Removal and Installation
7. Lower the vehicle.
8. Using a scan tool, relearn the front disc brake pad wear sensor. Brake Pad Life Monitoring
Reset

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4/26/23, 10:17 AM Front Disc Brake Pads Replacement (JBP)

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Disc Brakes | Repair Instructions |
Document ID: 5380878

Front Disc Brake Pads Replacement (JBP)

Removal Procedure

Warning: The battery must be disconnected to prevent the brake master cylinder from
pressurizing the hydraulic system during its automated self diagnostic tests that can
possibly occur when a door is opened or the key transmitter is activated. Failure to
follow this precaution may cause personal injury.

Warning: Brake Dust Warning

Note:

Always replace disc brake pads in axle sets.

If installing new brake pads, a NEW brake pad wear sensor must be installed.

1. Inspect the fluid level in the brake master cylinder reservoir.

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2. If the brake fluid level is midway between the maximum-full point and the minimum allowable
level, no brake fluid needs to be removed before proceeding.
3. If the brake fluid level is higher than midway between the maximum-full point and the
minimum allowable level, remove brake fluid to the midway point before proceeding.
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4. Set the parking brake in service mode. Parking Brake Service Mode Selection
5. Disconnect the battery negative cable. Battery Negative Cable Disconnection and Connection
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6. Raise and support the vehicle. Lifting and Jacking the Vehicle.
7. Remove the front tire and wheel assembly. Tire and Wheel Removal and Installation
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Note: If installing new front disc brake pads, a NEW sensor must be installed.
8. Front Disc Brake Pad Wear Sensor (1) @ Vehicle » Remove — Front Disc Brake Pad Wear
Sensor Replacement

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4/26/23, 10:17 AM Front Disc Brake Pads Replacement (JBP)

Note:
Do NOT use air or power tools to remove or install the brake caliper guide pin bolts.
Use hand tools ONLY.
Install an open end wrench to hold the caliper guide pin in line with the brake caliper
while removing or installing the caliper guide pin bolt. Allowing the open end wrench
to come in contact with the brake caliper will cause a pulsation when the brakes are
applied.
9. Front Brake Caliper Guide Pin Bolt (1) » Remove
Caution: Support the brake caliper with heavy mechanic wire, or equivalent, whenever it is
separated from its mount and the hydraulic flexible brake hose is still connected.
Failure to support the caliper in this manner will cause the flexible brake hose to
bear the weight of the caliper, which may cause damage to the brake hose and in
turn may cause a brake fluid leak.
10. Pivot the brake caliper upward and secure with heavy mechanics wire, or equivalent. (2)

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11. Front Disc Brake Inner Pad (1) @ Front Brake Caliper Bracket (3) » Remove
12. Front Disc Brake Outer Pad (2) @ Front Brake Caliper Bracket (3) » Remove

© 2023 General Motors. All rights reserved.

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4/26/23, 10:17 AM Front Disc Brake Pads Replacement (JBP)

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13. Front Disc Brake Pad Retaining Spring (1) @ Front Brake Caliper Bracket (2) » Remove and
DISCARD [4x]
14. Inspect the front disc brake mounting and hardware. Refer to Front Disc Brake Mounting and
Hardware Inspection.

Installation Procedure .c
1. Using a commercial brake caliper piston retracting tool, carefully push back the brake caliper
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piston until it is compressed completely into the caliper bore.
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2. Front Disc Brake Pad Retaining Spring (1) @ Front Brake Caliper Bracket (2) » Install NEW
[4x]

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4/26/23, 10:17 AM Front Disc Brake Pads Replacement (JBP)

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3. Front Disc Brake Outer Pad (2) @ Front Brake Caliper Bracket (3) » Install
4. Front Disc Brake Inner Pad (1) @ Front Brake Caliper Bracket (3) » Install

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5. Remove the support and rotate the front brake caliper (2) into position over the disc brake
pads and to the caliper mounting bracket.
Caution: Fastener Caution
Note: Install an open end wrench to hold the caliper guide pin in line with the brake caliper
while removing or installing the caliper guide pin bolt.
6. Front Brake Caliper Guide Pin Bolt (1) » Install and tighten 36.5 Y (27 lb ft)

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4/26/23, 10:17 AM Front Disc Brake Pads Replacement (JBP)

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Note: If installing new front disc brake pads, a NEW sensor must be installed.
7. Front Disc Brake Pad Wear Sensor (1) @ Vehicle » Install — Front Disc Brake Pad Wear Sensor
Replacement
8. Install the front tire and wheel assembly. Tire and Wheel Removal and Installation
9. Lower the vehicle. .c
10. Connect the battery negative cable. Battery Negative Cable Disconnection and Connection
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11. With the vehicle OFF, gradually apply the brake pedal to approximately 2/3 of its travel
distance.
12. Slowly release the brake pedal.
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13. Wait 15 seconds, then gradually apply the brake pedal approximately 2/3 of its travel distance
again until a firm brake pedal apply is obtained. This will properly seat the brake caliper
pistons and brake pads.
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14. Inspect the fluid level in the brake master cylinder reservoir.
15. Calibrate the park brake. Park Brake Calibration
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16. Using a scan tool, relearn the front disc brake pad wear sensor. Brake Pad Life Monitoring
Reset
17. Burnish the brake pads and rotors. Brake Pad and Rotor Burnishing

© 2023 General Motors. All rights reserved.

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4/26/23, 10:16 AM Front Disc Brake Pads Replacement

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Disc Brakes | Repair Instructions |
Document ID: 5236073

Front Disc Brake Pads Replacement

Removal Procedure

Warning: The battery must be disconnected to prevent the brake master cylinder from
pressurizing the hydraulic system during its automated self diagnostic tests that can
possibly occur when a door is opened or the key transmitter is activated. Failure to
follow this precaution may cause personal injury.

Warning: Brake Dust Warning

Note: Always replace disc brake pads in axle sets.

1. Inspect the fluid level in the brake master cylinder reservoir.

2. If the brake fluid level is midway between the maximum-full point and the minimum allowable
level, no brake fluid needs to be removed before proceeding.

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3. If the brake fluid level is higher than midway between the maximum-full point and the
minimum allowable level, remove brake fluid to the midway point before proceeding.
4. Set the parking brake in service mode. Parking Brake Service Mode Selection
5. Disconnect the battery negative cable. Battery Negative Cable Disconnection and Connection
.c
6. Raise and support the vehicle. Lifting and Jacking the Vehicle.
7. Remove the front tire and wheel assembly. Tire and Wheel Removal and Installation
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Note:
Do NOT use air or power tools to remove or install the brake caliper guide pin bolts.
Use hand tools ONLY.
Install an open end wrench to hold the caliper guide pin in line with the brake caliper
while removing or installing the caliper guide pin bolt. Allowing the open end wrench
to come in contact with the brake caliper will cause a pulsation when the brakes are
applied.
8. Front Brake Caliper Guide
© 2023PinGeneral
Bolt (1)Motors.
» Remove
All rights reserved.

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4/26/23, 10:16 AM Front Disc Brake Pads Replacement

Caution: Support the brake caliper with heavy mechanic wire, or equivalent, whenever it is
separated from its mount and the hydraulic flexible brake hose is still connected.
Failure to support the caliper in this manner will cause the flexible brake hose to
bear the weight of the caliper, which may cause damage to the brake hose and in
turn may cause a brake fluid leak.
9. Pivot the brake caliper upward and secure with heavy mechanics wire, or equivalent. (2)

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10. Front Disc Brake Inner Pad (1) @ Front Brake Caliper Bracket (3) » Remove
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11. Front Disc Brake Outer Pad (2) @ Front Brake Caliper Bracket (3) » Remove
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12. Front Disc Brake Pad Retaining Spring (1) @ Front Brake Caliper Bracket (2) » Remove and
DISCARD [4x]
13. Inspect the front disc brake mounting and hardware. Refer to Front Disc Brake Mounting and
Hardware Inspection.

Installation Procedure
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4/26/23, 10:16 AM Front Disc Brake Pads Replacement

Note: Do NOT rotate the brake caliper piston.

1. Using a commercial brake caliper piston retracting tool, carefully push back the brake caliper
piston until it is compressed completely into the caliper bore.

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2. Front Disc Brake Pad Retaining Spring (1) @ Front Brake Caliper Bracket (2) » Install NEW
[4x]
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3. Apply a coating of grease evenly on the front disc brake pad retaining spring (1). Adhesives,
Fluids, Lubricants, and Sealers
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4. Front Disc Brake Outer Pad (2) @ Front Brake Caliper Bracket (3) » Install
5. Front Disc Brake Inner Pad (1) @ Front Brake Caliper Bracket (3) » Install

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4/26/23, 10:16 AM Front Disc Brake Pads Replacement

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6. Remove the support and rotate the front brake caliper (2) into position over the disc brake
pads and to the caliper mounting bracket.
Caution: Fastener Caution
Note: Install an open end wrench to hold the caliper guide pin in line with the brake caliper
while removing or installing the caliper guide pin bolt.
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7. Front Brake Caliper Guide Pin Bolt (1) » Install and tighten 36.5 Y (27 lb ft)
8. Install the front tire and wheel assembly. Tire and Wheel Removal and Installation
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9. Lower the vehicle.
10. Connect the battery negative cable. Battery Negative Cable Disconnection and Connection
11. With the vehicle OFF, gradually apply the brake pedal to approximately 2/3 of its travel
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distance.
12. Slowly release the brake pedal.
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13. Wait 15 seconds, then gradually apply the brake pedal approximately 2/3 of its travel distance
again until a firm brake pedal apply is obtained. This will properly seat the brake caliper
pistons and brake pads.
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14. Inspect the fluid level in the brake master cylinder reservoir.
15. Calibrate the park brake. Park Brake Calibration
16. Burnish the brake pads and rotors. Brake Pad and Rotor Burnishing

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4/26/23, 10:47 AM Front Wheel Speed Sensor Replacement (JBP)

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Antilock Brake System | Repair Instructions |
Document ID: 5380877

Front Wheel Speed Sensor Replacement (JBP)

Removal Procedure

1. Raise and support the vehicle. Lifting and Jacking the Vehicle
2. Remove the front tire and wheel assembly. Tire and Wheel Removal and Installation

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3. Front Wheelhouse Liner (1) » Remove — Front Wheelhouse Liner Replacement
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4. Front Wheel Speed Sensor Wiring Harness (1) @ Body Front Suspension Support » Unclip
5. Electrical Connector (2) @ Body Wiring Harness » Disconnect

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4/26/23, 10:47 AM Front Wheel Speed Sensor Replacement (JBP)

6. Electrical Connector (1) @ Park Brake Actuator » Disconnect

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7. Wheel Speed Sensor Bracket Nut (1) @ Front Brake Hose Bracket » Remove
8. Wheel Speed Sensor Wire Bracket Bolt (2) @ Front Suspension Strut » Remove

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4/26/23, 10:47 AM Front Wheel Speed Sensor Replacement (JBP)

9. Front Wheel Speed Sensor Wiring Harness (1) @ Front Disc Brake Pad Wear Sensor Harness

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Clip » Remove

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10. Front Wheel Speed Sensor Bolt (1) @ Steering Knuckle » Remove
11. Front Wheel Speed Sensor (2) @ Steering Knuckle » Remove

Installation Procedure

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4/26/23, 10:47 AM Front Wheel Speed Sensor Replacement (JBP)

1. Front Wheel Speed Sensor (2) @ Steering Knuckle » Install

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Caution: Fastener Caution
2. Front Wheel Speed Sensor Bolt (1) @ Steering Knuckle » Install and tighten 9 Y (80 lb in)

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3. Front Wheel Speed Sensor Wiring Harness (1) @ Front Disc Brake Pad Wear Sensor Harness
Clip » Install

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4/26/23, 10:47 AM Front Wheel Speed Sensor Replacement (JBP)

4. Wheel Speed Sensor Wire Bracket Bolt (2) @ Front Suspension Strut » Install and tighten 9

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Y (80 lb in)
5. Wheel Speed Sensor Bracket Nut (1) @ Front Brake Hose Bracket » Install and tighten 9 Y
(80 lb in)

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6. Electrical Connector (1) @ Park Brake Actuator » Connect

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4/26/23, 10:47 AM Front Wheel Speed Sensor Replacement (JBP)

7. Electrical Connector (2) @ Body Wiring Harness » Connect

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8. Front Wheel Speed Sensor Wiring Harness (1) @ Body Front Suspension Support » Install

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9. Front Wheelhouse Liner (1) » Install — Front Wheelhouse Liner Replacement

10. Install the front tire and wheel assembly. Tire and Wheel Removal and Installation
11. Lower the vehicle.

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4/26/23, 10:47 AM Front Wheel Speed Sensor Replacement

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Antilock Brake System | Repair Instructions |
Document ID: 5210526

Front Wheel Speed Sensor Replacement

Removal Procedure

1. Raise and support the vehicle. Lifting and Jacking the Vehicle
2. Remove the front tire and wheel assembly. Tire and Wheel Removal and Installation

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3. Front Wheelhouse Liner (1) » Remove — Front Wheelhouse Liner Replacement
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4. Front Wheel Speed Sensor Wiring Harness (1) @ Body Front Suspension Support » Unclip
5. Electrical Connector (2) @ Body Wiring Harness » Disconnect

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4/26/23, 10:47 AM Front Wheel Speed Sensor Replacement

6. Electrical Connector (1) @ Park Brake Actuator » Disconnect

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7. Wheel Speed Sensor Bracket Nut (1) @ Front Brake Hose Bracket » Remove
8. Wheel Speed Sensor Wire Bracket Bolt (2) @ Front Suspension Strut » Remove

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4/26/23, 10:47 AM Front Wheel Speed Sensor Replacement

9. Front Wheel Speed Sensor Wiring Harness (1) @ Steering Knuckle » Unclip

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10. Front Wheel Speed Sensor Bolt (1) @ Steering Knuckle » Remove
11. Front Wheel Speed Sensor (2) @ Steering Knuckle » Remove

Installation Procedure

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4/26/23, 10:47 AM Front Wheel Speed Sensor Replacement

1. Front Wheel Speed Sensor (2) @ Steering Knuckle » Install

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Caution: Fastener Caution
2. Front Wheel Speed Sensor Bolt (1) @ Steering Knuckle » Install and tighten 9 Y (80 lb in)

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3. Front Wheel Speed Sensor Wiring Harness (1) @ Steering Knuckle » Install

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4/26/23, 10:47 AM Front Wheel Speed Sensor Replacement

4. Wheel Speed Sensor Wire Bracket Bolt (2) @ Front Suspension Strut » Install and tighten 9

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Y (80 lb in)
5. Wheel Speed Sensor Bracket Nut (1) @ Front Brake Hose Bracket » Install and tighten 9 Y
(80 lb in)

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6. Electrical Connector (1) @ Park Brake Actuator » Connect

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4/26/23, 10:47 AM Front Wheel Speed Sensor Replacement

7. Electrical Connector (2) @ Body Wiring Harness » Connect

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8. Front Wheel Speed Sensor Wiring Harness (1) @ Body Front Suspension Support » Install

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9. Front Wheelhouse Liner (1) » Install — Front Wheelhouse Liner Replacement

10. Install the front tire and wheel assembly. Tire and Wheel Removal and Installation
11. Lower the vehicle.

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4/26/23, 11:03 AM Hill Descent Control Indicator Malfunction

2022 Buick Encore GX | | Brakes | Antilock Brake System |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5569277

Hill Descent Control Indicator Malfunction

Diagnostic Instructions

Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
Review Strategy Based Diagnosis for an overview of the diagnostic approach.
Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC B273A 02 Hill Descent Control Switch Short to Ground

Diagnostic Fault Information

Short to Open/High Short to Signal

Circuit Ground Resistance Voltage Performance

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Signal B273A 02 1 1 —

Ground — 1 — —
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1. Hill descent control switch inoperative
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Circuit/System Description

The body control module monitors the signal circuit from the hill descent control switch. The hill
descent switch is a momentary switch that is normally open. When the hill descent control switch
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is pressed once, the body control module will request the electronic brake control module via
serial data to disable or enable the hill descent control. When activated, the switch grounds the
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hill descent control system signal circuit. The electronic brake control module then enables or
disables the hill descent control system. The electronic brake control module will request the
instrument cluster via serial data to turn the hill descent indicator ON or OFF to notify the driver.
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Conditions for Running the DTC

Ignition ON.

Conditions for Setting the DTC

The body control module detects a short to ground on the signal circuit.

Action Taken When the DTC Sets

The body control module ignores the hill descent switch signal input.

Conditions for Clearing the DTC

The DTC clears when the diagnostic runs and passes.

The history DTC will clear after 40 consecutive fault-free ignition cycles have occurred.

Reference Information
Schematic Reference

Antilock Brake System Schematics

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4/26/23, 11:03 AM Hill Descent Control Indicator Malfunction

Connector End View Reference

Master Electrical Component List

Description and Operation

ABS Description and Operation

Electrical Information Reference

Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

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1. Ignition ON.
2. Verify the scan tool Body Control Module Hill Descent Control Switch parameter changes
between Active and Inactive when pressing and releasing the hill descent control switch.
⇒ If the parameter does not change
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Refer to Circuit/System Testing.
⇓ If the parameter changes
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3. All OK.

Circuit/System Testing
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1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the S48E
Multifunction Switch — Center Console. It may take up to 2 min for all vehicle systems to
power down.
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2. Test for less than 5 Ω between the ground circuit terminal 1 and ground.
⇒ If 5 Ω or greater
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2.1. Ignition OFF.

2.2. Test for less than 2 Ω in the ground circuit end to end.
⇒ If 2 Ω or greater, repair the open/high resistance in the circuit.
⇒ If less than 2 Ω, repair the open/high resistance in the ground connection.
⇓ If less than 5 Ω
3. Ignition ON.
4. Verify the scan tool Body Control Module Hill Descent Control Switch parameter is Inactive.
⇒ If not Inactive
4.1. Ignition OFF, disconnect the X2 harness connector at the K9 Body Control Module.
4.2. Test for infinite resistance between the signal circuit terminal 14 and ground.
⇒ If less than infinite resistance, repair the short to ground on the circuit.
⇒ If infinite resistance, replace the K9 Body Control Module.
⇓ If Inactive
5. Install a 3 A fused jumper wire between the signal circuit terminal 8 and the ground circuit
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4/26/23, 11:03 AM Hill Descent Control Indicator Malfunction

6. Verify the scan tool Hill Descent Control Switch parameter is Active.
⇒ If not Active
6.1. Ignition OFF, disconnect the X2 harness connector at the K9 Body Control Module, ignition
ON.
6.2. Test for less than 1 V between the signal circuit and ground.
⇒ If 1 V or greater, repair the short to voltage on the circuit.
⇓ If less than 1 V
6.3. Test for less than 2 Ω in the signal circuit end to end.
⇒ If 2 Ω or greater, repair the open/high resistance in the circuit.
⇒ If less than 2 Ω, replace the K9 Body Control Module.
⇓ If Active
7. Test or replace the S48E Multifunction Switch — Center Console.

Component Testing

1. Ignition OFF, disconnect the harness connector at the S48E Multifunction Switch — Center
Console.

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2. Test for infinite resistance between the signal terminal 8 and the ground terminal 1 with the
switch in the open position.
⇒ If less than infinite resistance
Replace the S48E Multifunction Switch — Center Console.
⇓ If infinite resistance
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3. Test for less than 2 Ω between the signal terminal 8 and the ground terminal 1 with the switch
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in the closed position.
⇒ If 2 Ω or greater
Replace the S48E Multifunction Switch — Center Console.
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⇓ If less than 2 Ω
4. All OK.
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Repair Instructions
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Perform the Diagnostic Repair Verification after completing the repair.

Instrument Panel Center Air Outlet Replacement

Control Module References for Body Control Module replacement, programming and setup

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4/26/23, 11:16 AM Hydraulic Brake Component Operation Visual Inspection

2022 Buick Encore GX | | Brakes | Hydraulic Brakes |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5044064

Hydraulic Brake Component Operation Visual Inspection

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Warning: Refer to Brake Fluid Irritant Warning.

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Caution: Refer to Brake Fluid Effects on Paint and Electrical Components Caution.
1. With the tire and wheel assemblies removed and the brake rotors retained by wheel lug nuts,
visually inspect the caliper piston dust boot (2) sealing area to ensure that there are no brake fluid
leaks.
2. If any evidence of a brake fluid leak is present, the brake caliper requires overhaul or replacement.
3. While the brake system is at rest (4), observe the position of the caliper piston (1) in relation to the
caliper housing.
4. Have an assistant apply and release the brake pedal several times while you observe the operation
of the hydraulic brake caliper.
4.1. Observe the caliper piston (1) for unrestricted and even movement during each apply of the
brake system (5).
4.2. Observe the caliper piston (1) for an unrestricted and even return motion during each release of
the brake system (6).
5. If the caliper piston (1) did not exhibit unrestricted and even movement during brake system apply
and/or release, the piston square seal (3) may be worn or damaged and the caliper may require
overhaul or replacement.

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4/26/23, 11:10 AM Hydraulic Brake Fluid Replacement

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Hydraulic Brakes | Repair Instructions |
Document ID: 5236113

Hydraulic Brake Fluid Replacement

Warning: Brake Fluid Irritant Warning

Caution: Brake Fluid Effects on Paint and Electrical Components Caution

Caution: Only use products that comply with GM specifications and check manufacturer information
respectively. We recommend the use of GM genuine products. Instructions must be followed
at all times. The use of any type of fluid other than the recommended type of brake fluid, may
cause contamination which could result in damage to the internal rubber seals and/or rubber
linings of hydraulic brake system components.

1. Clean the outer surface of the master cylinder brake fluid reservoir, on and around the reservoir cap,
prior to removing the cap and diaphragm. Brake Master Cylinder Reservoir Filling
2. Fill the master cylinder brake fluid reservoir to the maximum-fill level with GM approved brake fluid
from a clean, sealed brake fluid container. Adhesives, Fluids, Lubricants, and Sealers

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3. Maintain the brake fluid level in the master cylinder brake fluid reservoir to between the minimum
and maximum-fill level during the brake fluid replacement procedure.
4. Following the hydraulic brake system bleeding procedure, bleed each of the hydraulic brake wheel
circuits until clean, clear brake fluid is observed coming from each bleeder valve. Hydraulic Brake
System Bleeding
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5. Fill the master cylinder brake fluid reservoir to the maximum-fill level with GM approved brake fluid
from a clean, sealed brake fluid container. Brake Master Cylinder Reservoir Filling
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6. Securely install the master cylinder brake fluid reservoir diaphragm and cap.
7. Slowly apply and release the brake pedal, observing the brake pedal feel.
8. If the brake pedal feels spongy, perform the following:
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8.1. Visually inspect the hydraulic brake system for external leaks. Brake System External Leak
Inspection
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8.2. Using a scan tool, perform the antilock brake system automated bleed procedure to remove
any air that may have become trapped in the brake pressure modulator valve. Antilock Brake
System Automated Bleed
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4/26/23, 11:13 AM Hydraulic Brake Schematics

2022 Buick Encore GX | Encore GX Service Manual N America 14739426| Brakes | Hydraulic Brakes | Schematic and Routing Diagrams |
Document ID: 5674990

Hydraulic Brake Schematics

Hydraulic Brakes

L
O
C

D
E
P16 K160 S
C
Instrument Brake
Cluster System
Control
Module
A90
Logic
38

333
GN/GY

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1
B20
Brake

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2
Fluid Level
Switch
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250
BK
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G103
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4/26/23, 11:12 AM Hydraulic Brake System Bleeding (Pressure)

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Hydraulic Brakes | Repair Instructions |
Document ID: 5236096

Hydraulic Brake System Bleeding (Pressure)

Special Tools

CH-29532-A Pressure Brake Bleeder

CH-44894-A Brake Bleeder Adapter

For equivalent regional tools. Special Tools

Warning: Brake Dust Warning

Warning: Brake Fluid Irritant Warning.

Caution: Brake Fluid Effects on Paint and Electrical Components Caution.

Caution: Only use products that comply with GM specifications and check manufacturer information
respectively. We recommend the use of GM genuine products. Instructions must be followed
at all times. The use of any type of fluid other than the recommended type of brake fluid, may

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cause contamination which could result in damage to the internal rubber seals and/or rubber
linings of hydraulic brake system components.

Note: If the system is opened at the brake master cylinder, a full hydraulic brake system bleed is
necessary.

Bleeding a Single Hydraulic Brake Circuit

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1. Use Global Diagnostic System (GDS) to deactivate brake boost system with disconnect brake
fluid level sensor.
2. Place a clean shop cloth beneath the brake master cylinder to prevent brake fluid spills.
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3. Clean the outside of the reservoir on and around the reservoir cap prior to removing the cap
and diaphragm.
Note: The pressure bleeding equipment must be the diaphragm type. The rubber diaphragm
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between the air supply and the brake fluid prevents air, moisture, oil, and other
contaminants from entering the hydraulic system.
4. Fill the brake master cylinder reservoir with GM approved brake fluid from a clean, sealed
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brake fluid container. Ensure that the brake master cylinder reservoir remains at least half-full
during this bleeding procedure. Add fluid as needed to maintain the proper level. Brake Master
Cylinder Reservoir Filling
5. Check the brake fluid level in the CH-29532-A Pressure Brake Bleeder. Add GM approved brake
fluid from a clean, sealed brake fluid container as necessary to bring the level to
approximately the half-full point. Adhesives, Fluids, Lubricants, and Sealers
6. Install the CH-44894-A Brake Bleeder Adapter to the brake master cylinder reservoir.
7. Connect the CH-29532-A Pressure Brake Bleeder, to the CH-44894-A Brake Bleeder Adapter.
8. Charge the CH-29532-A Pressure Brake Bleeder, air tank to 207 - 310 kPa (30 - 45 psi).
9. Open the CH-29532-A Pressure Brake Bleeder, fluid tank valve to allow pressurized brake fluid
to enter the brake system.
10. Wait approximately 30 seconds, then inspect the entire hydraulic brake system in order to
ensure that there are no existing external brake fluid leaks. Any brake fluid leaks identified
require repair prior to completing this procedure. Brake System External Leak Inspection
11. Install a proper box-end wrench onto the wheel hydraulic circuit bleeder valve which has been
serviced.
12. Install a transparent hose over the end of the bleeder valve.
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4/26/23, 11:12 AM Hydraulic Brake System Bleeding (Pressure)

13. Submerge the open end of the transparent hose into a transparent container partially filled
with GM approved brake fluid from a clean, sealed brake fluid container. Adhesives, Fluids,
Lubricants, and Sealers
14. Loosen the bleeder valve to purge air from the wheel hydraulic circuit.
15. Allow fluid to flow until air bubbles stop flowing from the bleeder.
16. Cycle the park brake ON and OFF after opening the bleeder valve on the rear calipers.
17. After all air has been purged from the hydraulic circuit, tighten the bleeder valve to the
necessary torque specification and install the dust cap.
Front Brake Caliper Bleeder Valve Replacement
Rear Brake Bleeder Valve Replacement
Note: The brake reservoir may have residual pressure after the bleeding operation is
complete. Wrap a clean shop towel around the bleeder adapter and all hose connections
before disconnecting the pressure bleeding equipment to prevent brake fluid from
contacting and damaging vehicle components and painted surfaces
18. Close the CH-29532-A Pressure Brake Bleeder, fluid tank valve, then disconnect the CH-
29532-A Pressure Brake Bleeder, from the CH-44894-A Brake Bleeder Adapter.
19. Remove the CH-44894-A Brake Bleeder Adapter from the brake master cylinder reservoir.

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20. Fill the brake master cylinder reservoir to the maximum-fill level with GM approved brake fluid
from a clean, sealed brake fluid container. Adhesives, Fluids, Lubricants, and Sealers
21. Inspect the brake system for external leaks. Brake System External Leak Inspection
22. Run the GDS - Brake Hydraulic Test, if it fails, perform the Bleeding the Complete Brake
Hydraulic System procedure. .c
23. Connect the brake fluid level sensor.
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24. Turn the ignition ON, with the engine OFF. Check to see if the brake system warning lamp
remains illuminated.
25. Inspect the brake system for external leaks. Brake System External Leak Inspection
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Note: DO NOT allow the vehicle to be driven until it is diagnosed and repaired.
26. If the brake system warning lamp remains illuminated, go to Diagnostic Starting Point -
Vehicle.
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Bleeding Complete Brake Hydraulic System

1. Use Global Diagnostic System (GDS) to deactivate brake boost system with disconnect brake
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fluid level sensor.

2. Place a clean shop cloth beneath the brake master cylinder to prevent brake fluid spills.
3. Clean the outside of the reservoir on and around the reservoir cap prior to removing the cap
and diaphragm.
Note: The pressure bleeding equipment must be the diaphragm type. The rubber diaphragm
between the air supply and the brake fluid prevents air, moisture, oil, and other
contaminants from entering the hydraulic system.
4. Fill the brake master cylinder reservoir with GM approved brake fluid from a clean, sealed
brake fluid container. Ensure that the brake master cylinder reservoir remains at least half-full
during this bleeding procedure. Add fluid as needed to maintain the proper level. Brake Master
Cylinder Reservoir Filling
5. Check the brake fluid level in the CH-29532-A Pressure Brake Bleeder. Add GM approved brake
fluid from a clean, sealed brake fluid container as necessary to bring the level to
approximately the half-full point. Adhesives, Fluids, Lubricants, and Sealers
6. Install the CH-44894-A Brake Bleeder Adapter to the brake master cylinder reservoir.
7. Connect the CH-29532-A Pressure Brake Bleeder, to the CH-44894-A Brake Bleeder Adapter.
8. Charge the CH-29532-A Pressure Brake Bleeder, air tank to 207 - 310 kPa (30 - 45 psi).
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4/26/23, 11:12 AM Hydraulic Brake System Bleeding (Pressure)

9. Open the CH-29532-A Pressure Brake Bleeder, fluid tank valve to allow pressurized brake fluid
to enter the brake system.
10. Wait approximately 30 seconds, then inspect the entire hydraulic brake system in order to
ensure that there are no existing external brake fluid leaks. Any brake fluid leaks identified
require repair prior to completing this procedure. Brake System External Leak Inspection
11. Install a proper box-end wrench onto the LEFT REAR wheel hydraulic circuit bleeder valve.
12. Install a transparent hose over the end of the bleeder valve.
13. Submerge the open end of the transparent hose into a transparent, graduated container
partially filled with GM approved brake fluid from a clean, sealed brake fluid container. Note
amount of fluid in the container. Adhesives, Fluids, Lubricants, and Sealers
14. Loosen the bleeder valve to purge air from the wheel hydraulic circuit.
15. Allow fluid to flow until air bubbles stop flowing from the bleeder.
16. After all air has been purged from the hydraulic circuit, close the bleeder valve.
17. Install a proper box-end wrench onto the LEFT FRONT wheel hydraulic circuit bleeder valve,
then repeat steps 12-17.
18. Install a proper box-end wrench onto the RIGHT FRONT wheel hydraulic circuit bleeder valve,
then repeat steps 12-17.

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19. Install a proper box-end wrench onto the RIGHT REAR wheel hydraulic circuit bleeder valve,
then repeat steps 12-17.
20. After all air has been purged from the hydraulic circuit, tighten the bleeder valve to the
necessary torque specification and install the dust cap.
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Front Brake Caliper Bleeder Valve Replacement
Rear Brake Bleeder Valve Replacement
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21. Close the CH-29532-A Pressure Brake Bleeder, fluid tank valve, then disconnect the CH-
29532-A Pressure Brake Bleeder, from the CH-44894-A Brake Bleeder Adapter.
22. Remove the CH-44894-A Brake Bleeder Adapter from the brake master cylinder reservoir.
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23. Fill the brake master cylinder reservoir to the maximum-fill level with GM approved brake fluid
from a clean, sealed brake fluid container. Adhesives, Fluids, Lubricants, and Sealers
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24. Inspect the brake system for external leaks. Brake System External Leak Inspection
25. Run the GDS — Brake Hydraulic Test, if it fails. Antilock Brake System Automated Bleed
26. Connect the brake fluid level sensor.
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27. Turn the ignition ON, with the engine OFF. Check to see if the brake system warning lamp
remains illuminated.
Note: DO NOT allow the vehicle to be driven until it is diagnosed and repaired.
28. If the brake system warning lamp remains illuminated, go to Diagnostic Starting Point -
Vehicle.

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4/26/23, 11:10 AM Hydraulic Brake System Description and Operation

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Hydraulic Brakes |
Description and Operation | Document ID: 5064125

Hydraulic Brake System Description and Operation

System Component Description

The hydraulic brake system consists of the following:

Hydraulic Brake Master Cylinder Fluid Reservoir Contains supply of brake fluid for the
hydraulic brake system.

Hydraulic Brake Master Cylinder Converts mechanical input force into hydraulic output
pressure.

Hydraulic output pressure is distributed from the master cylinder through 2 hydraulic
circuits, supplying diagonally-opposed wheel apply circuits.

Hydraulic Brake Pressure Balance Control System Regulates brake fluid pressure delivered
to hydraulic brake wheel circuits, in order

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to control the distribution of braking force.

Pressure balance control is achieved through dynamic rear proportioning (DRP), which is a
function of the ABS modulator.

Hydraulic Brake Pipes and Flexible Brake Hoses Carries brake fluid to and from hydraulic
.c brake system components.

Hydraulic Brake Wheel Apply Components Converts hydraulic input pressure into mechanical
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output force.

System Operation
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Mechanical force is converted into hydraulic pressure by the master cylinder, regulated to meet
braking system demands by the pressure balance control system, and delivered to the hydraulic
brake wheel circuits by the pipes and flexible hoses. The wheel apply components then convert
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the hydraulic pressure back into mechanical force which presses linings against rotating brake
system components.
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4/26/23, 11:16 AM Hydraulic Brake System Diagnosis

2022 Buick Encore GX | | Brakes | Hydraulic Brakes |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5236108

Hydraulic Brake System Diagnosis

Hydraulic Brake System Diagnosis

Step Action Yes No

DEFINITION: This diagnostic table is designed to diagnose ONLY the components of the
HYDRAULIC brake system in order to determine if the HYDRAULIC brake system is operating
properly. You will be directed by the appropriate Symptom table to go to other brake system
diagnostic tables as appropriate.

Were you sent here from a Hydraulic Brake Go to Symptoms

1 Symptom table? - Hydraulic
Go to Step 2 Brakes

Inspect and adjust the brake fluid level in the

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brake master cylinder. Brake Master Cylinder
2 Reservoir Filling
Was the brake fluid level low? Go to Step 5 Go to Step 3

conditions, indicating brake fluid

contamination:
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1. Inspect the brake fluid for the following
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Fluid separation, indicating two types of
fluid are present
– Swirled appearance – oil-based
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substance
– Layered appearance – silicone-based
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substance
3 Fluid discoloration
– Cloudy appearance – moisture
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– Dark appearance/suspended particles

in fluid – dirt, rust, corrosion, brake
dust
2. Inspect the master cylinder reservoir cap
diaphragm and the reservoir-to-master
cylinder grommets for swelling, indicating fluid
contamination.

Do any of the above conditions exist? Go to Step 4 Go to Step 10

4 Go to Step 8 —
1. Flush the hydraulic brake system. Hydraulic
Brake System Flushing
2. If the brake fluid WAS contaminated with an
oil-based or a silicone-based fluid, indicated
by fluid separation and/or a swollen master
cylinder reservoir cap diaphragm and/or
swollen reservoir-to-master cylinder
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4/26/23, 11:16 AM Hydraulic Brake System Diagnosis

Step Action Yes No

grommets, perform the following steps. Refer

to the procedures indicated.
2.1. Remove ALL of the following components
listed. Each component contains internal
rubber seals/linings which have been
contaminated.
2.2. Clean out the hydraulic brake pipes using
denatured alcohol, or equivalent.
2.3. Dry the brake pipes using non-lubricated,
filtered air.
2.4. Repair or replace ALL of the following
components listed. Each component
contains internal rubber seals/linings
which have been contaminated.
Brake Master Cylinder Replacement
- With Power Brake Booster and

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Electronic Brake Control Module
Brake master cylinder reservoir:
Clean the brake master cylinder
reservoir using denatured alcohol,
or equivalent, then dry the
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reservoir using non-lubricated,
filtered air, or if necessary, replace
the brake master cylinder reservoir.
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Replace the brake master cylinder
reservoir cap diaphragm.
Front Brake Hose Replacement
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Rear Brake Hose Replacement

Front Brake Caliper Replacement
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Rear Brake Caliper Replacement

3. If the brake fluid was NOT contaminated with
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an oil-based fluid, but WAS contaminated with

water or dirt, rust, corrosion, and/or brake
dust, replace the brake master cylinder
reservoir cap diaphragm which may have
allowed moisture or dirt to enter the system.
4. Refill and bleed the hydraulic brake system.
Hydraulic Brake System Bleeding

Did you complete the operation and any required

repairs and/or replacements?

5 Go to Step 6 Go to Step 10
1. Inspect the following hydraulic brake system
components for external fluid leaks. Repair or
replace any of the components found to be
leaking brake fluid. Refer to the appropriate
procedures:
Brake Master Cylinder Replacement -
With Power Brake Booster and Electronic
Brake Control Module
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4/26/23, 11:16 AM Hydraulic Brake System Diagnosis

Step Action Yes No

Front Brake Hose Replacement

Rear Brake Hose Replacement
Brake Pressure Modulator Valve Front
Brake Pipe Replacement
Rear Brake Intermediate Number 1 Pipe
Replacement
Rear Brake Intermediate Number 2 Pipe
Replacement
Front Brake Caliper Replacement
Rear Brake Caliper Replacement
2. If you repaired or replaced any of the brake
system components listed, bleed the hydraulic
brake system. Hydraulic Brake System
Bleeding While bleeding the hydraulic brake
system, observe for the following conditions:
The presence of air in the system at a

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bleeder valve location other than at the
repair location, except if the brake
master cylinder was replaced
An unrestricted and even flow of brake
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fluid per axle during the bleeding
procedure
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Did you find and correct a condition?

Was there air in the system at a bleeder valve

6 location other than at the repair location, except if
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the brake master cylinder was replaced? Go to Step 17 Go to Step 7

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Was the flow of brake fluid unrestricted and even

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per axle during the bleeding procedure? Go to Step 8 Go to Step 9
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Inspect the hydraulic function of the brake

calipers for proper operation. Hydraulic Brake
8 Component Operation Visual Inspection
Was the hydraulic function of the brake calipers
operating properly? Go to Step 17 Go to Step 12

Was the flow of brake fluid restricted or uneven

9 through front axle hydraulic components during
the bleeding procedure? Go to Step 13 Go to Step 10

Inspect the hydraulic function of the brake

calipers for proper operation. Hydraulic Brake
10 Component Operation Visual Inspection
Was the hydraulic function of the brake calipers
operating properly? Go to Step 13 Go to Step 11

11 Determine if the brake caliper is restricting the Go to Step 15 Go to Step 12

flow of brake fluid and/or not operating properly.
Brake Caliper Inspection
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4/26/23, 11:16 AM Hydraulic Brake System Diagnosis

Step Action Yes No

Was the flow of brake fluid unrestricted and did

the caliper piston move freely?

Repair or replace any brake caliper that was not

operating properly. Refer to the appropriate
procedure:
12 Front Brake Caliper Replacement —

Rear Brake Caliper Replacement

Did you complete the repair and/or replacement? Go to Step 17

Bleed the hydraulic brake system to observe for

the presence of air in the system and to observe
for an unrestricted and even flow of brake fluid
13 per axle during the bleeding procedure. Hydraulic
Brake System Bleeding

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Was there air in the system? Go to Step 17 Go to Step 14

Was the flow of brake fluid unrestricted and even

14
per axle during the bleeding procedure? Go to Step 17 Go to Step 15

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1. Inspect the hydraulic brake pipes and flexible
brake hoses for signs of a fluid restriction;
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such as being bent, kinked, pinched or
damaged. Brake Pipe and Hose Inspection
2. Replace any of the hydraulic brake pipes
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and/or flexible brake hoses found to be bent,

kinked, pinched, or damaged. Refer to the
following procedures as necessary:
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Front Brake Hose Replacement

Rear Brake Hose Replacement
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15 Brake Pressure Modulator Valve Front

Brake Pipe Replacement
Rear Brake Intermediate Number 1 Pipe
Replacement
Rear Brake Intermediate Number 2 Pipe
Replacement
3. If none of the hydraulic brake pipes or flexible
brake hoses were visibly bent, kinked,
pinched, or damaged, replace the hydraulic
brake flex hose at the restricted location.

Did you find and correct a condition? Go to Step 17 Go to Step 16

16 Go to Step 17 Go to Step 3
1. Inspect the hydraulic brake system
components for brake fluid seepage at a seal
and/or fitting location, which may have drawn
air into the system.

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4/26/23, 11:16 AM Hydraulic Brake System Diagnosis

Step Action Yes No

2. Inspect the hydraulic brake system

components for evidence of a recent repair,
which may have introduced air into the
system.
3. Repair or replace any of the components found
to be installed incorrectly or seeping brake
fluid.

Did you find and correct a condition?

Install or connect components that were removed Hydraulic Brake

or disconnected during diagnosis. System OK
17 —
Did you complete the operation? Return to
Symptom Table

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4/26/23, 11:12 AM Hydraulic Brake System Flushing

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Hydraulic Brakes | Repair Instructions |
Document ID: 5236094

Hydraulic Brake System Flushing

Warning: Refer to Brake Fluid Irritant Warning.

Caution: Refer to Brake Fluid Effects on Paint and Electrical Components Caution.

Caution: Only use products that comply with GM specifications and check manufacturer information
respectively. We recommend the use of GM genuine products. Instructions must be followed
at all times. The use of any type of fluid other than the recommended type of brake fluid, may
cause contamination which could result in damage to the internal rubber seals and/or rubber
linings of hydraulic brake system components.

1. Inspect the brake fluid for the following conditions, indicating brake fluid contamination:
Fluid separation, indicating 2 types of fluid are present; a substance other than the
recommended brake fluid has been introduced into the brake hydraulic system
– Swirled appearance—oil-based substance

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– Layered appearance— silicone-based substance
Fluid discoloration, indicating the presence of moisture or particles that have been introduced
into the brake hydraulic system
– Cloudy appearance – moisture
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– Dark appearance/suspended particles in fluid - dirt, rust, corrosion, brake dust
2. Inspect the master cylinder reservoir cap diaphragm and the reservoir-to-master cylinder grommets
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for swelling, indicating brake fluid contamination.
3. If the brake fluid WAS contaminated with an oil-based or a silicone-based substance, indicated by
fluid separation and/or a swollen master cylinder reservoir cap diaphragm and/or swollen reservoir-
to-master cylinder grommets, perform the following:
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3.1. Remove ALL of the following components listed from the vehicle. Each component contains
internal rubber seals/linings which have been contaminated by the contaminated brake fluid in
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the brake hydraulic system.

Refer to the procedures indicated:
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Brake Master Cylinder Replacement - With Power Brake Booster and Electronic Brake
Control Module
Front Brake Hose Replacement
Rear Brake Hose Replacement
Front Brake Caliper Replacement
Rear Brake Caliper Replacement
3.2. Clean out all the hydraulic brake pipes using denatured alcohol, or equivalent.
3.3. Dry the brake pipes using non-lubricated, filtered air.
3.4. Repair or replace ALL of the following components listed and install them to the vehicle. Each
component contains internal rubber seals/linings which have been contaminated by the
contaminated brake fluid in the brake hydraulic system.
Refer to the procedures indicated:
Brake Master Cylinder Replacement - With Power Brake Booster and Electronic Brake
Control Module - Also perform the following:
Clean the brake master cylinder reservoir using denatured alcohol, or equivalent, then
dry the reservoir using non-lubricated, filtered air. Inspect the reservoir for cracks and/or
damage and replace if necessary. Brake Master Cylinder Reservoir Replacement
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4/26/23, 11:12 AM Hydraulic Brake System Flushing

Replace the brake master cylinder reservoir cap diaphragm.

Front Brake Hose Replacement
Rear Brake Hose Replacement
Front Brake Caliper Replacement
Rear Brake Caliper Replacement
4. If the brake fluid was NOT contaminated with an oil-based or a silicone-based substance, but WAS
contaminated with water or dirt, rust, corrosion, and/or brake dust, replace the brake master
cylinder reservoir cap diaphragm which may have allowed the moisture or particles to enter the
hydraulic system.
5. Fill the brake master cylinder reservoir to the maximum-fill level with GM approved brake fluid from
a clean, sealed brake fluid container. Fluid and Lubricant Recommendations
6. Pressure bleed the hydraulic brake system; begin the procedure with the pressure bleeder reservoir
filled to the maximum-fill level with the correct brake fluid as indicated. Hydraulic Brake System
Bleeding

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4/26/23, 11:12 AM Hydraulic Circuit Installation Verification

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Hydraulic Brakes | Repair Instructions |
Document ID: 5627407

Hydraulic Circuit Installation Verification

The Hydraulic Circuit Installation Verification is required after replacing the A104 Brake Master Cylinder
or more than one brake pipe has been disconnected from A104 Brake Master Cylinder:

The Hydraulic Circuit Installation Verification can be completed with a scan tool using the following
steps:

1. Place the vehicle on a hoist.

2. Install the scan tool to the data link connector.
3. Ignition ON/Vehicle in Service Mode
4. Select Hydraulic Circuit Installation Verification in the K160 Brake System Control Module/Controls
Functions list.
5. Perform the Left Front, Right Front, Left Rear, and Right Rear Corner tests and follow the scan tool
directions to complete the tests.

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6. If any of the corner tests did not pass, cross piping at the A104 Brake Master Cylinder may have
occurred.
7. Clear any DTCs that may be set.

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4/26/23, 11:05 AM Module Power, Ground, and Subsystem References

2022 Buick Encore GX | Encore GX Service Manual N America 14739426 | Brakes | Antilock Brake System | Schematic and Routing Diagrams |
Document ID: 5675076

Module Power, Ground, and Subsystem References

B+ P16 K9 L
P9 Instrument Body O
B+ X50A Driver Information Cluster C
Control
Fuse Block - ABS Center Display Module
X50D KR73 Underhood
Fuse Ignition Main D
F6BA Block - Relay E
A90 X2 14 S
60A Battery C
Logic

F21UA
60A F14UA
X6 A
10A
1788
402 BU/VT
RD/GY X1 65 52

240 539
RD/YE VT/GY

J349
X206 16

539
VT/GY

5985 2500 2501 2500 2501 6105 6106 1788

VT/YE BU WH BU WH BU/YE WH BU/VT

14 46 36 8 11 25 10 24 5 19 8

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K160 S48E
B+ B+ IGN ACCY Brake Multifunction
System Switch -
Control OFF Center
Module Console

1
38 1 30

333 250 2050 351

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Hydraulic
Brake
BK BK BK/WH
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Schematics
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G103 G104 G200

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4/26/23, 11:07 AM Park Brake Calibration

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Park Brake | Repair Instructions |
Document ID: 5431512

Park Brake Calibration

The park brakes do not require calibration often. Park brake calibration may be required after certain
service procedures are performed. Some of these procedures are as follows:

Park brake actuator replacement.

Front brake pad replacement.
Front brake rotor replacement.
Front brake caliper replacement.

The park brake calibration procedure can be completed using the following steps:

1. Block the drive wheels.

2. Install a scan tool to the vehicle.
3. Turn the ignition switch to the ON/RUN position with the engine OFF.

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4. Select Configuration/Reset Functions from the Brake System Control Module menu.
5. If available, perform the Parking Brake Calibration procedure.
6. If Park Brake Calibration is not available, proceed back and select Control Functions.

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7. Perform the Front Brake Caliper Piston Extend function.
8. Apply and release the park brakes using the park brake switch to ensure that the system is
functioning.
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4/26/23, 11:09 AM Park Brake System Diagnosis

2022 Buick Encore GX | | Brakes | Park Brake |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5236115

Park Brake System Diagnosis

Park Brake System Diagnosis

Step Action Yes No

DEFINITION: This diagnostic table is designed to diagnose ONLY the mechanical components of
the PARK brake system in order to determine if the PARK brake system is operating properly.
You will be directed by the appropriate Symptom table to go to other brake system diagnostic
tables as appropriate.

Were you sent here from a Hydraulic Brake

1
Symptom table? Go to Step 4 Go to Step 2

Were you sent here from a Park Brake Symptom

2
table? Go to Step 4 Go to Step 3

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1. Raise and support the vehicle. Lifting and
Jacking the Vehicle
2. With the park brake RELEASED, attempt to
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rotate the front wheels to check the front
brakes for a significant amount of drag.
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Do the front brakes have a significant amount of
drag? Go to Step 5 Go to Step 4
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1. Apply the park brake.

2. Attempt to rotate the front wheels to check
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4 the front brakes for a significant amount of

drag.
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Do the front brakes have a significant amount of

drag? Go to Step 8 Go to Step 5

1. Have an assistant apply the brakes.

2. Attempt to rotate the front wheels to check
the front brakes for a significant amount of
drag.
5
3. Repeat steps 1-2 for the opposite front wheel.
4. Rotate the front wheels to check the brake for
a significant reduction of drag.

Did the brake calipers apply and release properly? Go to Step 7 Go to Step 6

Replace the appropriate front brake caliper. Front

6 Brake Caliper Replacement —
Did you complete the replacement? Go to Step 8

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4/26/23, 11:09 AM Park Brake System Diagnosis

Step Action Yes No

Inspect the parking brake actuators for proper

operation and replace if necessary. Parking Brake
7 Actuator Replacement —
Did you complete the replacement? Go to Step 8

Connect any components that were disconnected

8 during diagnosis. Park Brake —
Did you complete the operation? System OK

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4/26/23, 11:07 AM Park Brake System Schematics

2022 Buick Encore GX | Encore GX Service Manual N America 14739426 | Brakes | Park Brake | Schematic and Routing Diagrams | Document ID: 5674991

Park Brake System Schematics

Electric Park Brake

L
O
C

D
E
S
C

S91 M104L M104R

Park Park Brake Park Brake
Brake M Actuator - M Actuator -
Control Left Right
P
Switch
1 2 1 2

1 7 4 5 3 2

1492 7684 6107 6108 7683 1134 4369 1988

GY/RD BU/BK YE/RD BU/VT 2001 4368
YE BN WH GY/BK GN/VT GY

X206 2 26 27 12 14 24

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X180 1 2 X181 1 2
1492 7684 6107 6108 7683 1134
YE GY/RD BN BU/BK YE/RD BU/VT

X200 62 26 27 60 61 25

1492
YE

29

12V
7684
GY/RD

44
5V
6107
BN

15
.c6108
BU/BK

9
7683
YE/RD

28
12V
1134
BU/VT

17
2001
WH

13
4369
GY/BK

12
1988
GN/VT

2
4368
GY

3
K160
Brake
System
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Control
Module
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4/26/23, 11:09 AM Park Brake Will Not Hold or Release

2022 Buick Encore GX | | Brakes | Park Brake |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5236117

Park Brake Will Not Hold or Release

Park Brake Will Not Hold or Release

Step Action Yes No

Were you sent here from the Park Brake Symptom Go to Diagnostic
1 table? Starting Point -
Go to Step 2 Vehicle

Inspect the park brake system for proper

2 operation. Park Brake System Diagnosis
Did you find and correct a condition? Go to Step 5 Go to Step 3

Inspect the disc brake system for proper

3 operation. Disc Brake System Diagnosis

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Did you find and correct a condition? Go to Step 5 Go to Step 4

Inspect the hydraulic brake system for proper Go to Diagnostic

4 operation. Hydraulic Brake System Diagnosis Starting Point -
Did you find and correct a condition?.c
Road test the vehicle in order to confirm proper
Go to Step 5 Vehicle
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5 operation. Brake System Vehicle Road Test
Is the condition still present? Go to Step 2 System OK
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4/26/23, 11:08 AM Parking Brake Actuator Replacement

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Park Brake | Repair Instructions |
Document ID: 5236120

Parking Brake Actuator Replacement

Removal Procedure

1. Set the parking brake in service mode. Parking Brake Service Mode Selection
2. Raise and support the vehicle. Lifting and Jacking the Vehicle.
3. Remove the front tire and wheel assembly. Tire and Wheel Removal and Installation

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4. Electrical Connector (1) @ Parking Brake Actuator » Disconnect

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5. Parking Brake Actuator Harness Retainer (2) » Release

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4/26/23, 11:08 AM Parking Brake Actuator Replacement

6. Parking Brake Actuator Bolt (1) @ Front Brake Caliper » Remove [2x]
7. Parking Brake Actuator (2) @ Front Brake Caliper » Remove
8. Parking Brake Actuator Seal (3) @ Front Brake Caliper » Remove and DISCARD

Installation Procedure

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1. Parking Brake Actuator Seal (3) @ Front Brake Caliper » Install NEW
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2. Parking Brake Actuator (2) @ Front Brake Caliper » Install

Caution: Fastener Caution
3. Parking Brake Actuator Bolt (1) @ Front Brake Caliper » » Install and tighten [2x] 11.5 Y
(102 lb in)

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4/26/23, 11:08 AM Parking Brake Actuator Replacement

4. Parking Brake Actuator Harness Retainer (2) » Install

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5. Electrical Connector (1) @ Parking Brake Actuator » Connect
6. Install the front tire and wheel assembly. Tire and Wheel Removal and Installation
7. Lower the vehicle.
8. Calibrate the park brake. Park Brake Calibration
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4/26/23, 11:08 AM Parking Brake Control Switch Replacement

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Park Brake | Repair Instructions |
Document ID: 5204929

Parking Brake Control Switch Replacement

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Parking Brake Control Switch Replacement
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Callout Component Name

Preliminary Procedures
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1. { With MRG } Transmission Control Lever Knob Replacement

2. { With M3F } Transmission Control Lever Knob Replacement
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Parking Brake Control Switch

1 Procedure
Release the tabs and remove the switch.

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4/26/23, 11:08 AM Parking Brake Service Mode Selection

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Park Brake | Repair Instructions |
Document ID: 5641362

Parking Brake Service Mode Selection

In order to perform repairs on certain parts of the brake system, it is necessary to fully retract the park
brake caliper pistons. There are two ways to set the park brake into service mode. The preferred
method is with a scan tool.

With Scan Tool

1. Install a scan tool.

2. Turn the ignition ON with the engine OFF.
3. Select Electronic Brake Control Module/Brake System Control Module.
4. Select Control Functions.
Note: Do NOT apply any brake pressure during this step.
5. Select Left Park Brake Actuator and Right Park Brake Actuator, command the actuators off.
6. Exit the control function.

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Without Scan Tool

1. Turn the ignition ON with the engine OFF.

2. Press accelerator pedal halfway down.
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3. Place the park brake switch in the release position and hold for 10 seconds. Release the park brake
switch.
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4. Within 5 seconds, place the park brake switch into the release position again.

Exiting Service Mode

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The park brake can be taken out of service mode with either of the following methods:

With a scan tool, select Left Park Brake Actuator and Right Park Brake Actuator, command the
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actuators on. Exit the control function

Place the park brake switch in the apply position.
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4/26/23, 10:27 AM Rear Brake Bleeder Valve Replacement

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Disc Brakes | Repair Instructions |
Document ID: 5236079

Rear Brake Bleeder Valve Replacement

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Rear Brake Bleeder Valve Replacement
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Callout Component Name

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Warning: The battery must be disconnected to prevent the brake master cylinder from
pressurizing the hydraulic system during its automated self diagnostic tests that can
possibly occur when a door is opened or the key transmitter is activated. Failure to
follow this precaution may cause personal injury.
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Warning: Brake Dust Warning

Warning: Brake Fluid Irritant Warning
Caution: Brake Fluid Effects on Paint and Electrical Components Caution
Preliminary Procedures

1. Disconnect the battery negative cable. Battery Negative Cable Disconnection and Connection
2. Raise and support the vehicle. Lifting and Jacking the Vehicle.
3. Remove the rear tire and wheel assembly. Tire and Wheel Removal and Installation

1 Rear Brake Bleeder Valve Cap

2 Rear Brake Bleeder Valve

Caution: Fastener Caution
Tighten
17 Y (13 lb ft)
Procedure
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4/26/23, 10:27 AM Rear Brake Bleeder Valve Replacement

Callout Component Name

1. Install the rear tire and wheel assembly. Tire and Wheel Removal and
Installation
2. Connect the battery negative cable. Battery Negative Cable Disconnection and
Connection

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4/26/23, 10:32 AM Rear Brake Caliper Bracket Replacement (JBP)

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Disc Brakes | Repair Instructions |
Document ID: 5380887

Rear Brake Caliper Bracket Replacement (JBP)

Removal Procedure

Warning: The battery must be disconnected to prevent the brake master cylinder from
pressurizing the hydraulic system during its automated self diagnostic tests that can
possibly occur when a door is opened or the key transmitter is activated. Failure to
follow this precaution may cause personal injury.

Warning: Brake Dust Warning

1. Disconnect the battery negative cable. Battery Negative Cable Disconnection and Connection
2. Raise and support the vehicle. Lifting and Jacking the Vehicle
3. Remove the rear tire and wheel assembly. Tire and Wheel Removal and Installation

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Note: If installing new rear disc brake pads, a NEW sensor must be installed.
4. Rear Disc Brake Pad Wear Sensor (1) @ Vehicle » Remove — Rear Disc Brake Pad Wear Sensor
Replacement

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4/26/23, 10:32 AM Rear Brake Caliper Bracket Replacement (JBP)

Note:
Do NOT use air or power tools to remove or install the brake caliper guide pin bolts.
Use hand tools ONLY.
Install an open end wrench to hold the caliper guide pin in line with the brake caliper
while removing or installing the caliper guide pin bolt. Allowing the open end wrench
to come in contact with the brake caliper will cause a pulsation when the brakes are
applied.
5. Rear Brake Caliper Guide Pin Bolt (1) » Remove [2x]
Caution: Support the brake caliper with heavy mechanic wire, or equivalent, whenever it is
separated from its mount and the hydraulic flexible brake hose is still connected.
Failure to support the caliper in this manner will cause the flexible brake hose to
bear the weight of the caliper, which may cause damage to the brake hose and in
turn may cause a brake fluid leak.
6. Remove the rear brake caliper (2) from the brake caliper bracket and support the rear brake
caliper (2) with heavy mechanic’s wire, or equivalent. Do NOT disconnect the hydraulic brake
flexible hose from the caliper.

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7. Rear Brake Shoe Return Spring (1) » Remove [2x]

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4/26/23, 10:32 AM Rear Brake Caliper Bracket Replacement (JBP)

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8. Rear Disc Brake Inner Pad (1) @ Rear Brake Caliper Bracket (3) » Remove
9. Rear Disc Brake Outer Pad (2) @ Rear Brake Caliper Bracket (3) » Remove

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10. Rear Disc Brake Pad Retainer Spring (1) @ Rear Brake Caliper Bracket (2) » Remove [2x]

© 2023 General Motors. All rights reserved.

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4/26/23, 10:32 AM Rear Brake Caliper Bracket Replacement (JBP)

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11. Rear Brake Caliper Bracket Bolt (1) » Remove [2x]
12. Rear Brake Caliper Bracket (2) @ Vehicle » Remove

Installation Procedure

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1. Prepare the rear brake caliper bracket bolts for installation as follows:
1.1. Remove any loose cured adhesive from the external threads of the component using a
lint free cloth.
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1.2. Thread the cleaned components into the internal mating threads and remove to loosen
trapped cured adhesive.
1.3. Apply thread locking adhesive to the external threads of the components.
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1.4. Ensure there are no gaps in the thread locking adhesive once applied to the component.
rd
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2. Rear Brake Caliper Bracket (2) @ Vehicle » Install

Caution: Fastener Caution
3. Rear Brake Caliper Bracket
© 2023Bolt (1) » Motors.
General Install and
All tighten [2x] 100 Y (74 lb ft)
rights reserved.

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4/26/23, 10:32 AM Rear Brake Caliper Bracket Replacement (JBP)

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4. Rear Disc Brake Pad Retainer Spring (1) @ Rear Brake Caliper Bracket (2) » Install [2x]

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Note: The disc brake pad equipped with wear sensor has to be mounted in lower position on
the inner side of the rotor.
5. Rear Disc Brake Outer Pad (2) @ Rear Brake Caliper Bracket (3) » Install
6. Rear Disc Brake Inner Pad (1) @ Rear Brake Caliper Bracket (3) » Install

© 2023 General Motors. All rights reserved.

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4/26/23, 10:32 AM Rear Brake Caliper Bracket Replacement (JBP)

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7. Rear Brake Shoe Return Spring (1) » Install [2x]

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8. Remove the support and reposition the rear brake caliper (2) over the brake pads and to the
rear brake caliper bracket.
Note: Install an open end wrench to hold the caliper guide pin in line with the brake caliper
while removing or installing the caliper guide pin bolt.
9. Rear Brake Caliper Guide Pin Bolt (1) » Install and tighten [2x] 40 Y (30 lb ft)

© 2023 General Motors. All rights reserved.

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4/26/23, 10:32 AM Rear Brake Caliper Bracket Replacement (JBP)

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Note: If installing new rear disc brake pads, a NEW sensor must be installed.
10. Rear Disc Brake Pad Wear Sensor (1) @ Vehicle » Install — Rear Disc Brake Pad Wear Sensor
Replacement
11. Install the rear tire and wheel assembly. Tire and Wheel Removal and Installation
12. Lower the vehicle. .c
13. Connect the battery negative cable. Battery Negative Cable Disconnection and Connection
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© 2023 General Motors. All rights reserved.

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4/26/23, 10:31 AM Rear Brake Caliper Bracket Replacement

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Disc Brakes | Repair Instructions |
Document ID: 5236082

Rear Brake Caliper Bracket Replacement

Removal Procedure

Warning: The battery must be disconnected to prevent the brake master cylinder from
pressurizing the hydraulic system during its automated self diagnostic tests that can
possibly occur when a door is opened or the key transmitter is activated. Failure to
follow this precaution may cause personal injury.

Warning: Brake Dust Warning

1. Disconnect the battery negative cable. Battery Negative Cable Disconnection and Connection
2. Raise and support the vehicle. Lifting and Jacking the Vehicle
3. Remove the rear tire and wheel assembly. Tire and Wheel Removal and Installation

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Note:
Do NOT use air or power tools to remove or install the brake caliper guide pin bolts.
Use hand tools ONLY.
Install an open end wrench to hold the caliper guide pin in line with the brake caliper
while removing or installing the caliper guide pin bolt. Allowing the open end wrench
to come in contact with the brake caliper will cause a pulsation when the brakes are
applied.
4. Rear Brake Caliper Guide Pin Bolt (1) » Remove [2x]
Caution: Support the brake caliper with heavy mechanic wire, or equivalent, whenever it is
separated from its mount and the hydraulic flexible brake hose is still connected.
Failure to support the caliper in this manner will cause the flexible brake hose to
bear the weight of the caliper, which may cause damage to the brake hose and in
turn may cause a brake fluid leak.
5. Remove the rear brake caliper (2) from the brake caliper bracket and support the rear brake
caliper (2) with heavy mechanic’s wire, or equivalent. Do NOT disconnect the hydraulic brake
flexible hose from the caliper.
© 2023 General Motors. All rights reserved.

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4/26/23, 10:31 AM Rear Brake Caliper Bracket Replacement

6. Rear Brake Shoe Return Spring (1) » Remove [2x]

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7. Rear Disc Brake Inner Pad (1) @ Rear Brake Caliper Bracket (3) » Remove
8. Rear Disc Brake Outer Pad (2) @ Rear Brake Caliper Bracket (3) » Remove
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9. Rear Disc Brake Pad Retainer Spring (1) @ Rear Brake Caliper Bracket (2) » Remove [2x]

© 2023 General Motors. All rights reserved.

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4/26/23, 10:31 AM Rear Brake Caliper Bracket Replacement

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10. Rear Brake Caliper Bracket Bolt (1) » Remove [2x]
11. Rear Brake Caliper Bracket (2) @ Vehicle » Remove

Installation Procedure

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1. Prepare the rear brake caliper bracket bolts for installation as follows:
1.1. Remove any loose cured adhesive from the external threads of the component using a
lint free cloth.
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1.2. Thread the cleaned components into the internal mating threads and remove to loosen
trapped cured adhesive.
1.3. Apply thread locking adhesive to the external threads of the components.
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1.4. Ensure there are no gaps in the thread locking adhesive once applied to the component.
rd
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2. Rear Brake Caliper Bracket (2) @ Vehicle » Install

Caution: Fastener Caution
3. Rear Brake Caliper Bracket
© 2023Bolt (1) » Motors.
General Install and
All tighten [2x] 100 Y (74 lb ft)
rights reserved.

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4/26/23, 10:31 AM Rear Brake Caliper Bracket Replacement

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4. Rear Disc Brake Pad Retainer Spring (1) @ Rear Brake Caliper Bracket (2) » Install [2x]

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Note: The disc brake pad equipped with wear sensor has to be mounted in lower position on
the inner side of the rotor.
5. Rear Disc Brake Outer Pad (2) @ Rear Brake Caliper Bracket (3) » Install
6. Rear Disc Brake Inner Pad (1) @ Rear Brake Caliper Bracket (3) » Install

© 2023 General Motors. All rights reserved.

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4/26/23, 10:31 AM Rear Brake Caliper Bracket Replacement

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7. Rear Brake Shoe Return Spring (1) » Install [2x]

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8. Remove the support and reposition the rear brake caliper (2) over the brake pads and to the
rear brake caliper bracket.
Note: Install an open end wrench to hold the caliper guide pin in line with the brake caliper
while removing or installing the caliper guide pin bolt.
9. Rear Brake Caliper Guide Pin Bolt (1) » Install and tighten [2x] 40 Y (30 lb ft)
10. Install the rear tire and wheel assembly. Tire and Wheel Removal and Installation
11. Lower the vehicle.
12. Connect the battery negative cable. Battery Negative Cable Disconnection and Connection

© 2023 General Motors. All rights reserved.

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4/26/23, 10:30 AM Rear Brake Caliper Guide Pin Replacement (JBP)

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Disc Brakes | Repair Instructions |
Document ID: 5380889

Rear Brake Caliper Guide Pin Replacement (JBP)

Removal Procedure

Warning: The battery must be disconnected to prevent the brake master cylinder from
pressurizing the hydraulic system during its automated self diagnostic tests that can
possibly occur when a door is opened or the key transmitter is activated. Failure to
follow this precaution may cause personal injury.

Warning: Brake Dust Warning

1. Disconnect the battery negative cable. Battery Negative Cable Disconnection and Connection
2. Raise and support the vehicle. Lifting and Jacking the Vehicle
3. Remove the rear tire and wheel assembly. Tire and Wheel Removal and Installation

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Note: If installing new rear disc brake pads, a NEW sensor must be installed.
4. Rear Disc Brake Pad Wear Sensor (1) @ Vehicle » Remove — Rear Disc Brake Pad Wear Sensor
Replacement

© 2023 General Motors. All rights reserved.

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4/26/23, 10:30 AM Rear Brake Caliper Guide Pin Replacement (JBP)

Note:
Do NOT use air or power tools to remove or install the brake caliper guide pin bolts.
Use hand tools ONLY.
Install an open end wrench to hold the caliper guide pin in line with the brake caliper
while removing or installing the caliper guide pin bolt. Allowing the open end wrench
to come in contact with the brake caliper will cause a pulsation when the brakes are
applied.
5. Rear Brake Caliper Guide Pin Bolt (1) » Remove [2x]
Caution: Support the brake caliper with heavy mechanic wire, or equivalent, whenever it is
separated from its mount and the hydraulic flexible brake hose is still connected.
Failure to support the caliper in this manner will cause the flexible brake hose to
bear the weight of the caliper, which may cause damage to the brake hose and in
turn may cause a brake fluid leak.
6. Remove the rear brake caliper (2) from the brake caliper bracket and support the rear brake
caliper (2) with heavy mechanic’s wire, or equivalent. Do NOT disconnect the hydraulic brake
flexible hose from the caliper.

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7. Rear Brake Caliper Guide Pin (1) » Remove [2x]

8. Rear Brake Caliper Guide Pin Boot (2) » Remove [2x]

Installation Procedure

© 2023 General Motors. All rights reserved.

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4/26/23, 10:30 AM Rear Brake Caliper Guide Pin Replacement (JBP)

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1. Rear Brake Caliper Guide Pin Boot » Install [2x]
2. Rear Brake Caliper Guide Pin (1) » Install [2x]

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3. Remove the support and reposition the rear brake caliper (2) over the brake pads and to the
rear brake caliper bracket.
Caution: Fastener Caution
Note: Install an open end wrench to hold the caliper guide pin in line with the brake caliper
while removing or installing the caliper guide pin bolt.
4. Rear Brake Caliper Guide Pin Bolt (1) » Install and tighten [2x] 40 Y (30 lb ft)

© 2023 General Motors. All rights reserved.

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4/26/23, 10:30 AM Rear Brake Caliper Guide Pin Replacement (JBP)

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Note: If installing new rear disc brake pads, a NEW sensor must be installed.
5. Rear Disc Brake Pad Wear Sensor (1) @ Vehicle » Install — Rear Disc Brake Pad Wear Sensor
Replacement
6. Install the rear tire and wheel assembly. Tire and Wheel Removal and Installation
7. Lower the vehicle. .c
8. Connect the battery negative cable. Battery Negative Cable Disconnection and Connection
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© 2023 General Motors. All rights reserved.

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4/26/23, 10:28 AM Rear Brake Caliper Guide Pin Replacement

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Disc Brakes | Repair Instructions |
Document ID: 5236080

Rear Brake Caliper Guide Pin Replacement

Removal Procedure

Warning: The battery must be disconnected to prevent the brake master cylinder from
pressurizing the hydraulic system during its automated self diagnostic tests that can
possibly occur when a door is opened or the key transmitter is activated. Failure to
follow this precaution may cause personal injury.

Warning: Brake Dust Warning

1. Disconnect the battery negative cable. Battery Negative Cable Disconnection and Connection
2. Raise and support the vehicle. Lifting and Jacking the Vehicle
3. Remove the rear tire and wheel assembly. Tire and Wheel Removal and Installation

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rd
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Note:
Do NOT use air or power tools to remove or install the brake caliper guide pin bolts.
Use hand tools ONLY.
Install an open end wrench to hold the caliper guide pin in line with the brake caliper
while removing or installing the caliper guide pin bolt. Allowing the open end wrench
to come in contact with the brake caliper will cause a pulsation when the brakes are
applied.
4. Rear Brake Caliper Guide Pin Bolt (1) » Remove [2x]
Caution: Support the brake caliper with heavy mechanic wire, or equivalent, whenever it is
separated from its mount and the hydraulic flexible brake hose is still connected.
Failure to support the caliper in this manner will cause the flexible brake hose to
bear the weight of the caliper, which may cause damage to the brake hose and in
turn may cause a brake fluid leak.
5. Remove the rear brake caliper (2) from the brake caliper bracket and support the rear brake
caliper (2) with heavy mechanic’s wire, or equivalent. Do NOT disconnect the hydraulic brake
flexible hose from the caliper.
© 2023 General Motors. All rights reserved.

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4/26/23, 10:28 AM Rear Brake Caliper Guide Pin Replacement

6. Rear Brake Caliper Guide Pin (1) » Remove [2x]

7. Rear Brake Caliper Guide Pin Boot (2) » Remove [2x]

Installation Procedure

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1. Rear Brake Caliper Guide Pin Boot » Install [2x]
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2. Apply a light coat of high temperature silicone brake lubricant to the caliper guide pins.
3. Rear Brake Caliper Guide Pin (1) » Install [2x]
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4. Remove the support and reposition the rear brake caliper (2) over the brake pads and to the
rear brake caliper bracket.
Caution: Fastener Caution
Note: Install an open end wrench to hold the caliper guide pin in line with the brake caliper
while removing or installing the caliper guide pin bolt.
© 2023 General Motors. All rights reserved.

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4/26/23, 10:28 AM Rear Brake Caliper Guide Pin Replacement

5. Rear Brake Caliper Guide Pin Bolt (1) » Install and tighten [2x] 40 Y (30 lb ft)
6. Install the rear tire and wheel assembly. Tire and Wheel Removal and Installation
7. Lower the vehicle.
8. Connect the battery negative cable. Battery Negative Cable Disconnection and Connection

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© 2023 General Motors. All rights reserved.

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4/26/23, 10:30 AM Rear Brake Caliper Overhaul

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Disc Brakes | Repair Instructions |
Document ID: 5326265

Rear Brake Caliper Overhaul

Disassembly Procedure

Warning: Brake Dust Warning

Warning: Brake Fluid Irritant Warning

Warning: Do not place fingers in front of the caliper piston(s) in an attempt to catch or protect it
when applying compressed air. The piston(s) can fly out with force and could result in
serious bodily injury.

Caution: Use clean cloths to pad interior of caliper housing during piston removal. Use just
enough air to ease the pistons out of the bores. If the pistons are blown out, even with
the padding provided, it may be damaged.

1. Rear Brake Caliper » Remove — Rear Brake Caliper Replacement

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2. Rear Brake Bleeder Valve Cap (1) » Remove

3. Rear Brake Bleeder Valve (2) » Remove

© 2023 General Motors. All rights reserved.

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4/26/23, 10:30 AM Rear Brake Caliper Overhaul

Note: Direct low-pressure, compressed air through the brake caliper fluid inlet.

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4. Rear Brake Caliper Piston (1) » Remove
5. Rear Brake Caliper Piston Boot (2) » Remove and DISCARD

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Note: Use a wooden or plastic tool to remove the seal.

6. Rear Brake Caliper Piston Seal (1) » Remove and DISCARD
7. If cracks, scoring, pitting, excessive rust, and/or excessive corrosion are present in the caliper
bore, replace the caliper assembly.
8. If light rust or light corrosion are present in the caliper bore, attempt to remove the
imperfection with a fine emery paper. If the imperfection cannot be removed, replace the
caliper assembly.
9. Clean the brake caliper piston bore and seal counterbore, and the caliper piston with
denatured alcohol, or equivalent.
10. Dry the caliper piston bore and counterbore, and the piston with non-lubricated, filtered,
compressed air.
Note: Do NOT use abrasives to clean the brake caliper piston.
© 2023 General Motors. All rights reserved.

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4/26/23, 10:30 AM Rear Brake Caliper Overhaul

11. Inspect the caliper piston for cracks, scoring, and/or damage to the plating. Replace the
caliper piston if any of these conditions exist.
12. Inspect the caliper mounting holes for cracks, scoring, pitting, rust and/or excessive corrosion.
Replace the caliper assembly if any of these conditions exist.

Assembly Procedure

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1. Lubricate the NEW caliper piston seal with brake fluid from a clean, sealed brake fluid
container. Adhesives, Fluids, Lubricants, and Sealers
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2. Rear Brake Caliper Piston Seal (1) » Install NEW
3. Apply a thin coat of brake fluid from a clean, sealed brake fluid container to the brake caliper
bore. Adhesives, Fluids, Lubricants, and Sealers
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Note: Seat the NEW caliper piston dust boot in the groove of the brake caliper piston.
4. Rear Brake Caliper Piston Boot (2) @ Rear Brake Caliper Piston (1) » Install NEW
5. Compress the caliper piston to the bottom of the caliper bore.
6. Fully seat the piston dust boot seal into caliper counterbore.

© 2023 General Motors. All rights reserved.

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4/26/23, 10:30 AM Rear Brake Caliper Overhaul

Caution: Fastener Caution

7. Rear Brake Bleeder Valve (2) » Install and tighten 17 Y (13 lb ft)

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8. Rear Brake Bleeder Valve Cap (1) » Install
9. Rear Brake Caliper » Install — Rear Brake Caliper Replacement

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© 2023 General Motors. All rights reserved.

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4/26/23, 10:27 AM Rear Brake Caliper Replacement (JBP)

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Disc Brakes | Repair Instructions |
Document ID: 5380884

Rear Brake Caliper Replacement (JBP)

Removal Procedure

Warning: The battery must be disconnected to prevent the brake master cylinder from
pressurizing the hydraulic system during its automated self diagnostic tests that can
possibly occur when a door is opened or the key transmitter is activated. Failure to
follow this precaution may cause personal injury.

Warning: Brake Dust Warning

Warning: Brake Fluid Irritant Warning

Caution: Brake Fluid Effects on Paint and Electrical Components Caution

1. Disconnect the battery negative cable. Battery Negative Cable Disconnection and Connection
2. Raise and support the vehicle. Lifting and Jacking the Vehicle

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3. Remove the rear tire and wheel assembly. Tire and Wheel Removal and Installation

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Note: If installing new rear disc brake pads, a NEW sensor must be installed.
4. Rear Disc Brake Pad Wear Sensor (1) @ Vehicle » Remove — Rear Disc Brake Pad Wear Sensor
Replacement

© 2023 General Motors. All rights reserved.

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4/26/23, 10:27 AM Rear Brake Caliper Replacement (JBP)

5. Rear Brake Hose Fitting Bolt (1) @ Rear Brake Caliper » Remove
6. Rear Brake Hose (2) @ Rear Brake Caliper » Remove
7. Rear Brake Hose Washer (3) » Remove and DISCARD [2x]
These washers may be stuck to the brake caliper and/or the brake hose end.
8. Cap the opening in the brake caliper and the brake hose to prevent fluid loss and
contamination.

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Note:
Do NOT use air or power tools to remove or install the brake caliper guide pin bolts.
ia

Use hand tools ONLY.

Install an open end wrench to hold the caliper guide pin in line with the brake caliper
rd

while removing or installing the caliper guide pin bolt. Allowing the open end wrench
to come in contact with the brake caliper will cause a pulsation when the brakes are
applied.
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9. Rear Brake Caliper Guide Pin Bolt (1) » Remove [2x]

10. Rear Brake Caliper (2) @ Rear Brake Caliper Bracket » Remove
11. Inspect the brake caliper guide pins for freedom of movement, and inspect the condition of
the guide pin boots. Move the guide pins inboard and outboard within the bracket bores,
without disengaging the slides from the boots, and observe for the following:
Restricted caliper guide pin movement
Looseness in the brake caliper mounting bracket
Seized or binding caliper guide pins
Split or torn boots
12. If any of the conditions listed are found, the brake caliper guide pins and/or boots require
replacement.

Installation Procedure

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4/26/23, 10:27 AM Rear Brake Caliper Replacement (JBP)

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1. Rear Brake Caliper (2) @ Rear Brake Caliper Bracket » Install
Caution: Fastener Caution
Note: Install an open end wrench to hold the caliper guide pin in line with the brake caliper
while removing or installing the caliper guide pin bolt.
2. Rear Brake Caliper Guide Pin Bolt (1) » Install and tighten [2x] 40 Y (30 lb ft)
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3. Remove the caps from the brake caliper and the brake hose.
Note: Do not reuse the copper brake hose washers.
4. Rear Brake Hose Washer (3) » Install NEW [2x]
5. Rear Brake Hose (2) @ Rear Brake Caliper » Install
6. Rear Brake Hose Fitting Bolt (1) @ Rear Brake Caliper » Install and tighten [2x] 40 Y (30 lb
ft)

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4/26/23, 10:27 AM Rear Brake Caliper Replacement (JBP)

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Note: If installing new rear disc brake pads, a NEW sensor must be installed.
7. Rear Disc Brake Pad Wear Sensor (1) @ Vehicle » Install — Rear Disc Brake Pad Wear Sensor
Replacement
8. Install the rear tire and wheel assembly. Tire and Wheel Removal and Installation
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9. Connect the battery negative cable. Battery Negative Cable Disconnection and Connection
10. Bleed the brake system. Hydraulic Brake System Bleeding
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11. Lower the vehicle.
12. Fill the brake master cylinder reservoir to the maximum-full level with GM approved brake
fluid from a clean, sealed brake fluid container. Brake Master Cylinder Reservoir Filling
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rd
ca

© 2023 General Motors. All rights reserved.

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4/26/23, 10:26 AM Rear Brake Caliper Replacement

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Disc Brakes | Repair Instructions |
Document ID: 5236078

Rear Brake Caliper Replacement

Removal Procedure

Warning: The battery must be disconnected to prevent the brake master cylinder from
pressurizing the hydraulic system during its automated self diagnostic tests that can
possibly occur when a door is opened or the key transmitter is activated. Failure to
follow this precaution may cause personal injury.

Warning: Brake Dust Warning

Warning: Brake Fluid Irritant Warning

Caution: Brake Fluid Effects on Paint and Electrical Components Caution

1. Disconnect the battery negative cable. Battery Negative Cable Disconnection and Connection
2. Raise and support the vehicle. Lifting and Jacking the Vehicle

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3. Remove the rear tire and wheel assembly. Tire and Wheel Removal and Installation

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4. Rear Brake Hose Fitting Bolt (1) @ Rear Brake Caliper » Remove
5. Rear Brake Hose (2) @ Rear Brake Caliper » Remove
6. Rear Brake Hose Washer (3) » Remove and DISCARD [2x]
These washers may be stuck to the brake caliper and/or the brake hose end.
7. Cap the opening in the brake caliper and the brake hose to prevent fluid loss and
contamination.

© 2023 General Motors. All rights reserved.

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4/26/23, 10:26 AM Rear Brake Caliper Replacement

Note:
Do NOT use air or power tools to remove or install the brake caliper guide pin bolts.
Use hand tools ONLY.
Install an open end wrench to hold the caliper guide pin in line with the brake caliper
while removing or installing the caliper guide pin bolt. Allowing the open end wrench
to come in contact with the brake caliper will cause a pulsation when the brakes are
applied.
8. Rear Brake Caliper Guide Pin Bolt (1) » Remove [2x]
9. Rear Brake Caliper (2) @ Rear Brake Caliper Bracket » Remove
10. Inspect the brake caliper guide pins for freedom of movement, and inspect the condition of
the guide pin boots. Move the guide pins inboard and outboard within the bracket bores,
without disengaging the slides from the boots, and observe for the following:
Restricted caliper guide pin movement
Looseness in the brake caliper mounting bracket
Seized or binding caliper guide pins
Split or torn boots

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11. If any of the conditions listed are found, the brake caliper guide pins and/or boots require
replacement.

Installation Procedure

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1. Rear Brake Caliper (2) @ Rear Brake Caliper Bracket » Install

Caution: Fastener Caution
Note: Install an open end wrench to hold the caliper guide pin in line with the brake caliper
while removing or installing the caliper guide pin bolt.
2. Rear Brake Caliper Guide Pin Bolt (1) » Install and tighten [2x] 40 Y (30 lb ft)

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4/26/23, 10:26 AM Rear Brake Caliper Replacement

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3. Remove the caps from the brake caliper and the brake hose.
Note: Do not reuse the copper brake hose washers.
4. Rear Brake Hose Washer (3) » Install NEW [2x]
5. Rear Brake Hose (2) @ Rear Brake Caliper » Install

ft)
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6. Rear Brake Hose Fitting Bolt (1) @ Rear Brake Caliper » Install and tighten [2x] 40 Y (30 lb

7. Install the rear tire and wheel assembly. Tire and Wheel Removal and Installation
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8. Connect the battery negative cable. Battery Negative Cable Disconnection and Connection
9. Bleed the brake system. Hydraulic Brake System Bleeding
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10. Lower the vehicle.

11. Fill the brake master cylinder reservoir to the maximum-full level with GM approved brake
fluid from a clean, sealed brake fluid container. Brake Master Cylinder Reservoir Filling
rd
ca

© 2023 General Motors. All rights reserved.

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4/26/23, 11:12 AM Rear Brake Hose Replacement

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Hydraulic Brakes | Repair Instructions |
Document ID: 5236977

Rear Brake Hose Replacement

Removal Procedure

Warning: The battery must be disconnected to prevent the brake master cylinder from
pressurizing the hydraulic system during its automated self diagnostic tests that can
possibly occur when a door is opened or the key transmitter is activated. Failure to
follow this precaution may cause personal injury.

Warning: Refer to Brake Fluid Irritant Warning.

Caution: Refer to Brake Fluid Effects on Paint and Electrical Components Caution.

1. Disconnect the battery negative cable. Battery Negative Cable Disconnection and Connection
2. Raise and support the vehicle. Lifting and Jacking the Vehicle
3. Remove the rear tire and wheel assembly. Tire and Wheel Removal and Installation

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4. Clean all dirt and foreign material from the brake hose ends and the brake pipe fitting.

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5. Rear Brake Pipe Fitting (1) @ Rear Brake Hose (3) » Remove
6. Cap the brake pipe fitting to prevent brake fluid loss and contamination.
7. Rear Brake Hose Retainer (2) » Remove

© 2023 General Motors. All rights reserved.

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4/26/23, 11:12 AM Rear Brake Hose Replacement

8. Rear Brake Hose Fitting Bolt (1) @ Rear Brake Caliper » Remove

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9. Rear Brake Hose (2) @ Rear Brake Caliper » Remove
10. Rear Brake Hose Washer (3) » Remove and DISCARD [2x]
These washers may be stuck to the brake caliper and/or the brake hose end.

Installation Procedure .c
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Note: Do NOT reuse the brake hose washers.

1. Rear Brake Hose Washer (3) » Install NEW [2x]
2. Rear Brake Hose (2) @ Rear Brake Caliper » Install
Caution: Fastener Caution
3. Rear Brake Hose Fitting Bolt (1) @ Rear Brake Caliper » Install and tighten 40 Y (30 lb ft)

© 2023 General Motors. All rights reserved.

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4/26/23, 11:12 AM Rear Brake Hose Replacement

4. Rear Brake Hose Retainer (2) » Install

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5. Rear Brake Pipe Fitting (1) @ Rear Brake Hose (3) » Install and tighten 18 Y (13 lb ft)
6. Install the rear tire and wheel assembly. Tire and Wheel Removal and Installation
7. Connect the battery negative cable. Battery Negative Cable Disconnection and Connection
8. Bleed the brake system. Hydraulic Brake System Bleeding
9. Lower the vehicle.
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10. Fill the brake master cylinder reservoir to the maximum-full level with GM approved brake
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fluid from a clean, sealed brake fluid container. Brake Master Cylinder Reservoir Filling
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© 2023 General Motors. All rights reserved.

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4/26/23, 11:12 AM Rear Brake Intermediate Number 1 Pipe Replacement

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Hydraulic Brakes | Repair Instructions |
Document ID: 5236978

Rear Brake Intermediate Number 1 Pipe Replacement

Removal Procedure

Warning: The battery must be disconnected to prevent the brake master cylinder from
pressurizing the hydraulic system during its automated self diagnostic tests that can
possibly occur when a door is opened or the key transmitter is activated. Failure to
follow this precaution may cause personal injury.

Warning: Brake Fluid Irritant Warning

Caution: Brake Fluid Effects on Paint and Electrical Components Caution

1. Disconnect the battery negative cable. Battery Negative Cable Disconnection and Connection
2. Battery Tray » Remove — Battery Tray Replacement
3. Raise and support the vehicle. Lifting and Jacking the Vehicle.

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4. Remove the left front, left rear and right rear tires. Tire and Wheel Removal and Installation
5. Fuel Tank » Remove — Fuel Tank Replacement

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6. Brake Pressure Modulator Valve Front Brake Pipe Fitting (1) @ Brake Pressure Modulator Valve
» Remove
7. Cap the brake pipe fitting and plug the brake pressure modulator valve port to prevent brake
fluid loss and contamination.
8. Rear Brake Intermediate Pipe Fitting (2) @ Brake Pressure Modulator Valve » Remove
9. Cap the brake pipe fitting and plug the brake pressure modulator valve port to prevent brake
fluid loss and contamination.
10. Brake Pipe Clip (3) » Release

© 2023 General Motors. All rights reserved.

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4/26/23, 11:12 AM Rear Brake Intermediate Number 1 Pipe Replacement

11. Brake Pipe Clip (1) » Release

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12. Brake Pipe Clip (1) » Release
13. Brake Pipe Clip (2) » Release
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14. Rear Brake Intermediate Pipe Fitting (1) @ Rear Brake Hose (3) » Remove
15. Cap the brake pipe fitting to prevent brake fluid loss and contamination.
16. Rear Brake Hose Retainer (2) » Remove

© 2023 General Motors. All rights reserved.

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4/26/23, 11:12 AM Rear Brake Intermediate Number 1 Pipe Replacement

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17. Brake Pipe Clip (1) » Release
18. Brake Pipe Clip (2) » Release [2x]
19. Brake Pipe Clip (3) » Release
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20. Brake Pipe Clip (4) » Release

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© 2023 General Motors. All rights reserved.

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4/26/23, 11:12 AM Rear Brake Intermediate Number 1 Pipe Replacement

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21. Brake Pipe Clip (1) » Release [5x]
22. Rear Brake Intermediate Number 1 Pipe (2) @ Vehicle » Remove
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Installation Procedure
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© 2023 General Motors. All rights reserved.

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4/26/23, 11:12 AM Rear Brake Intermediate Number 1 Pipe Replacement

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1. Rear Brake Intermediate Number 1 Pipe (2) @ Vehicle » Install
2. Brake Pipe Clip (1) » Secure [5x]
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© 2023 General Motors. All rights reserved.

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4/26/23, 11:12 AM Rear Brake Intermediate Number 1 Pipe Replacement

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3. Brake Pipe Clip (4) » Secure
4. Brake Pipe Clip (3) » Secure
5. Brake Pipe Clip (2) » Secure [2x]
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6. Brake Pipe Clip (1) » Secure

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7. Rear Brake Hose Retainer (2) » Install

Caution: Fastener Caution
© 2023 General Motors. All rights reserved.

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4/26/23, 11:12 AM Rear Brake Intermediate Number 1 Pipe Replacement

8. Rear Brake Intermediate Pipe Fitting (1) @ Rear Brake Hose (3) » Install and tighten 18 Y
(13 lb ft)

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9. Brake Pipe Clip (2) » Secure
10. Brake Pipe Clip (1) » Secure
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11. Brake Pipe Clip (1) » Secure

© 2023 General Motors. All rights reserved.

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4/26/23, 11:12 AM Rear Brake Intermediate Number 1 Pipe Replacement

12. Brake Pipe Clip (3) » Secure

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13. Remove the cap from the brake pipe fitting and the plug from the brake pressure modulator
valve port.
14. Rear Brake Intermediate Pipe Fitting (2) @ Brake Pressure Modulator Valve » Install and
tighten 18 Y (13 lb ft)
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15. Remove the cap from the brake pipe fitting and the plug from the brake pressure modulator
valve port.
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16. Brake Pressure Modulator Valve Front Brake Pipe Fitting (1) @ Brake Pressure Modulator Valve
» Install and tighten 18 Y (13 lb ft)
17. Fuel Tank » Install — Fuel Tank Replacement
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18. Install the left front, left rear and right rear tires. Tire and Wheel Removal and Installation
19. Battery Tray » Install — Battery Tray Replacement
rd

20. Connect the battery negative cable. Battery Negative Cable Disconnection and Connection
21. Bleed the brake system. Hydraulic Brake System Bleeding
22. Lower the vehicle.
ca

23. Fill the brake master cylinder reservoir to the maximum-full level with GM approved brake
fluid from a clean, sealed brake fluid container. Brake Master Cylinder Reservoir Filling

© 2023 General Motors. All rights reserved.

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4/26/23, 11:12 AM Rear Brake Intermediate Number 2 Pipe Replacement

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Hydraulic Brakes | Repair Instructions |
Document ID: 5236979

Rear Brake Intermediate Number 2 Pipe Replacement

Removal Procedure

Warning: The battery must be disconnected to prevent the brake master cylinder from
pressurizing the hydraulic system during its automated self diagnostic tests that can
possibly occur when a door is opened or the key transmitter is activated. Failure to
follow this precaution may cause personal injury.

Warning: Brake Fluid Irritant Warning

Caution: Brake Fluid Effects on Paint and Electrical Components Caution

1. Disconnect the battery negative cable. Battery Negative Cable Disconnection and Connection
2. Battery Tray » Remove — Battery Tray Replacement
3. Raise and support the vehicle. Lifting and Jacking the Vehicle.

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4. Remove the left front and right rear tires. Tire and Wheel Removal and Installation
5. Fuel Tank » Remove — Fuel Tank Replacement

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6. Rear Brake Intermediate Pipe Fitting (1) @ Brake Pressure Modulator Valve » Remove
7. Cap the brake pipe fitting and plug the brake pressure modulator valve port to prevent brake
fluid loss and contamination.
8. Brake Pipe Clip (2) » Release

© 2023 General Motors. All rights reserved.

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4/26/23, 11:12 AM Rear Brake Intermediate Number 2 Pipe Replacement

9. Brake Pipe Clip (1) » Release

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10. Rear Brake Intermediate Pipe Fitting (1) @ Brake Pipe Union (2) » Remove
11. Cap the brake pipe fitting to prevent brake fluid loss and contamination.
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12. Brake Pipe Clip (1) » Release

13. Brake Pipe Clip (2) » Release
© 2023 General Motors. All rights reserved.

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4/26/23, 11:12 AM Rear Brake Intermediate Number 2 Pipe Replacement

14. Brake Pipe Clip (3) » Release

15. Brake Pipe Clip (4) » Release

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16. Brake Pipe Clip (1) » Release [5x]

17. Rear Brake Intermediate Number 2 Pipe (2) @ Vehicle » Remove
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Installation Procedure
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© 2023 General Motors. All rights reserved.

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4/26/23, 11:12 AM Rear Brake Intermediate Number 2 Pipe Replacement

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1. Rear Brake Intermediate Number 2 Pipe (2) @ Vehicle » Install
2. Brake Pipe Clip (1) » Secure [5x]
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© 2023 General Motors. All rights reserved.

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4/26/23, 11:12 AM Rear Brake Intermediate Number 2 Pipe Replacement

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3. Brake Pipe Clip (4) » Secure
4. Brake Pipe Clip (3) » Secure
5. Brake Pipe Clip (2) » Secure
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6. Brake Pipe Clip (1) » Secure

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Caution: Fastener Caution

7. Rear Brake Intermediate Pipe Fitting (1) @ Brake Pipe Union (2) » Install and tighten 18 Y
(13 lb ft) © 2023 General Motors. All rights reserved.

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4/26/23, 11:12 AM Rear Brake Intermediate Number 2 Pipe Replacement

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8. Brake Pipe Clip (1) » Secure

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9. Brake Pipe Clip (2) » Secure

10. Remove the cap from the brake pipe fitting and the plug from the brake pressure modulator
valve port.
11. Rear Brake Intermediate Pipe Fitting (1) @ Brake Pressure Modulator Valve » Install and
tighten 18 Y (13 lb ft)
12. Fuel Tank » Install — Fuel Tank Replacement
13. Install the left front and right rear tires. Tire and Wheel Removal and Installation
14. Battery Tray » Install — Battery Tray Replacement
15. Connect the battery negative cable. Battery Negative Cable Disconnection and Connection
16. Bleed the brake system. Hydraulic Brake System Bleeding
17. Lower the vehicle.
18. Fill the brake master cylinder reservoir to the maximum-full level with GM approved brake
fluid from a clean, sealed
© 2023brake fluid Motors.
General container.
AllBrake
rightsMaster Cylinder Reservoir Filling
reserved.

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4/26/23, 11:12 AM Rear Brake Intermediate Number 2 Pipe Replacement

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© 2023 General Motors. All rights reserved.

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4/26/23, 11:12 AM Rear Brake Pipe Replacement

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Hydraulic Brakes | Repair Instructions |
Document ID: 5236980

Rear Brake Pipe Replacement

Removal Procedure

Warning: The battery must be disconnected to prevent the brake master cylinder from
pressurizing the hydraulic system during its automated self diagnostic tests that can
possibly occur when a door is opened or the key transmitter is activated. Failure to
follow this precaution may cause personal injury.

Warning: Brake Fluid Irritant Warning

Caution: Brake Fluid Effects on Paint and Electrical Components Caution

1. Disconnect the battery negative cable. Battery Negative Cable Disconnection and Connection
2. Raise and support the vehicle. Lifting and Jacking the Vehicle
3. Remove the rear tire and wheel assembly. Tire and Wheel Removal and Installation

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4. Rear Wheelhouse Liner » Remove — Rear Wheelhouse Liner Replacement

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5. Rear Brake Pipe Fitting (1) @ Brake Pipe Union (2) » Remove
6. Cap the brake pipe union to prevent fluid loss and contamination.
7. Cap the brake pipe fitting to prevent brake fluid loss and contamination.

© 2023 General Motors. All rights reserved.

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4/26/23, 11:12 AM Rear Brake Pipe Replacement

8. Brake Pipe Clip (1) » Release

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9. Brake Pipe Clip Clip (2) » Release

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10. Rear Brake Pipe Fitting (1) @ Rear Brake Hose (3) » Remove
11. Cap the brake pipe fitting to prevent brake fluid loss and contamination.
12. Rear Brake Hose Retainer (2) » Remove

© 2023 General Motors. All rights reserved.

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4/26/23, 11:12 AM Rear Brake Pipe Replacement

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13. Brake Pipe Clip (1) » Release [3x]
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14. Rear Brake Pipe (2) @ Vehicle » Remove

Installation Procedure
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© 2023 General Motors. All rights reserved.

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4/26/23, 11:12 AM Rear Brake Pipe Replacement

1. Rear Brake Pipe (2) @ Vehicle » Install

2. Brake Pipe Clip (1) » Secure [3x]

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Caution: Fastener Caution
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3. Rear Brake Hose Retainer (2) » Install

4. Rear Brake Pipe Fitting (1) @ Rear Brake Hose (3) » Install and tighten 18 Y (13 lb ft)
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5. Brake Pipe Clip Clip (2) » Secure

6. Brake Pipe Clip (1) » Secure
7. Remove the cap from the brake pipe union.

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4/26/23, 11:12 AM Rear Brake Pipe Replacement

8. Rear Brake Pipe Fitting (1) @ Brake Pipe Union (2) » Install and tighten 18 Y (13 lb ft)
9. Rear Wheelhouse Liner » Install — Rear Wheelhouse Liner Replacement

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10. Install the rear tire and wheel assembly. Tire and Wheel Removal and Installation
11. Connect the battery negative cable. Battery Negative Cable Disconnection and Connection
12. Bleed the brake system. Hydraulic Brake System Bleeding
13. Lower the vehicle. .c
14. Fill the brake master cylinder reservoir to the maximum-full level with GM approved brake
fluid from a clean, sealed brake fluid container. Brake Master Cylinder Reservoir Filling
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© 2023 General Motors. All rights reserved.

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4/26/23, 10:33 AM Rear Brake Rotor Replacement

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Disc Brakes | Repair Instructions |
Document ID: 5236084

Rear Brake Rotor Replacement

Special Tools

CH-41013 Rotor Resurfacing Kit

CH-42450-A Wheel Hub Resurfacing Kit

For equivalent regional tools, refer to Special Tools.

Removal Procedure

Warning: The battery must be disconnected to prevent the brake master cylinder from
pressurizing the hydraulic system during its automated self diagnostic tests that can
possibly occur when a door is opened or the key transmitter is activated. Failure to
follow this precaution may cause personal injury.

Warning: Brake Dust Warning

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1. Disconnect the battery negative cable. Battery Negative Cable Disconnection and Connection
2. Raise and support the vehicle. Lifting and Jacking the Vehicle
3. Remove the rear tire and wheel assembly. Tire and Wheel Removal and Installation
4. Rear Brake Caliper Bracket » Remove — Rear Brake Caliper Bracket Replacement
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5. Rear Brake Rotor Bolt (1) » Remove

© 2023 General Motors. All rights reserved.

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4/26/23, 10:33 AM Rear Brake Rotor Replacement

6. Rear Brake Rotor (1) @ Rear Wheel Hub (2) » Remove

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Installation Procedure

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Note: Whenever the brake rotor has been separated from the hub/axle flange, any rust or
contaminants should be cleaned from the hub/axle flange and the brake rotor mating
surfaces. Failure to do this may result in excessive assembled lateral runout (LRO) of
the brake rotor, which could lead to brake pulsation.
1. Using the CH-42450-A Wheel Hub Resurfacing Kit, thoroughly clean any rust or corrosion from
the mating surface of the hub flange (1).
2. Using the CH-41013 Rotor Resurfacing Kit, thoroughly clean any rust or corrosion from the
mating surface of the rotor (2).
3. Inspect the mating surfaces of the hub/axle flange and the rotor to ensure that there are no
foreign particles or debris remaining.

© 2023 General Motors. All rights reserved.

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4/26/23, 10:33 AM Rear Brake Rotor Replacement

4. Rear Brake Rotor (1) @ Rear Wheel Hub (2) » Install

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Caution: Fastener Caution

5. Rear Brake Rotor Bolt (1) » Install and tighten 9 Y (80 lb in)
6. Rear Brake Caliper Bracket » Install — Rear Brake Caliper Bracket Replacement
7. Install the rear tire and wheel assembly. Tire and Wheel Removal and Installation
8. Lower the vehicle.
9. Connect the battery negative cable. Battery Negative Cable Disconnection and Connection
10. With the vehicle OFF, gradually apply the brake pedal approximately 2/3 of its travel distance.
11. Slowly release the brake pedal.
12. Wait 15 seconds, then gradually apply the brake pedal approximately 2/3 of its travel distance
again until a firm brake pedal apply is obtained. This will properly seat the brake caliper
pistons and brake pads.
13. Inspect the fluid level in the brake master cylinder reservoir.
14. Burnish the brake pads and rotors. Brake Pad and Rotor Burnishing

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4/26/23, 10:34 AM Rear Brake Shield Replacement

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Disc Brakes | Repair Instructions |
Document ID: 5236086

Rear Brake Shield Replacement

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Rear Brake Shield Replacement
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Callout Component Name

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Warning: Brake Dust Warning

Preliminary Procedures

1. Raise and support the vehicle. Lifting and Jacking the Vehicle
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2. Remove the rear tire and wheel assembly. Tire and Wheel Removal and Installation
3. Rear Wheel Bearing and Hub Replacement

1 Rear Brake Shield

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4/26/23, 10:44 AM Rear Disc Brake Mounting and Hardware Inspection

2022 Buick Encore GX | | Brakes | Disc Brakes |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5044431

Rear Disc Brake Mounting and Hardware Inspection

Warning: The battery must be disconnected to prevent the brake master cylinder from pressurizing the
hydraulic system during its automated self diagnostic tests that can possibly occur when a
door is opened or the key transmitter is activated. Failure to follow this precaution may cause
personal injury.

Warning: Brake Dust Warning

Warning: Brake Fluid Irritant Warning

Caution: Brake Fluid Effects on Paint and Electrical Components Caution

1. Inspect the fluid level in the brake master cylinder reservoir.

2. If the brake fluid level is midway between the maximum-full point and the minimum allowable level
then no brake fluid needs to be removed from the reservoir before proceeding.

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3. If the brake fluid level is higher than midway between the maximum-full point and the minimum
allowable level then remove brake fluid to the midway point before proceeding.
4. Disconnect the battery negative cable. Battery Negative Cable Disconnection and Connection
5. Raise and support the vehicle. Lifting and Jacking the Vehicle
.c
6. Remove the tire and wheel assembly. Tire and Wheel Removal and Installation
7. Grasp the brake caliper housing and try to move the brake caliper housing up/down and
forward/reverse in relation to the brake caliper mounting bracket. If excessive looseness is observed
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the brake caliper bracket bushings and/or the brake caliper mounting bolts may need to be
replaced.
8. Compress the rear caliper piston.
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8.1. Install a large C-clamp over the top of the caliper housing and against the back of the outboard
pad.
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8.2. Slowly tighten the C-clamp until the pistons are pushed completely into the caliper bores.
8.3. Remove the C-clamp from the caliper.
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9. With the piston compressed into the caliper bore, grasp the brake caliper housing and slide it back
and forth on the brake caliper mounting bolts. Check for smooth operation. If the brake caliper
housing slide force is high or the brake caliper housing does not slide smoothly, inspect the brake
caliper mounting bolts and/or the brake caliper mounting bracket bushings for wear or damage. If
wear or damage conditions are found, replacement of the brake caliper mounting bolts and/or the
brake caliper mounting bracket bushings is necessary.
10. Remove the brake caliper mounting bolts from the brake caliper mounting bracket and support the
brake caliper using heavy mechanics wire. Do not disconnect the hydraulic brake hose from the
caliper. Rear Brake Caliper Replacement
11. Remove the disc brake pads from the brake caliper mounting bracket.
12. Inspect the disc brake pad mounting hardware for the following:
Missing mounting hardware
Excessive corrosion
Bent mounting tabs
Looseness at the brake caliper mounting bracket
Looseness at the disc brake pads
Excessive contaminants in the brake caliper mounting bracket surface and threads.
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4/26/23, 10:44 AM Rear Disc Brake Mounting and Hardware Inspection

13. If any of the conditions listed are found, the disc brake pad mounting hardware requires
replacement.
14. Ensure the disc brake pads are held firmly in place on the brake caliper mounting bracket, yet slide
easily on the mounting hardware without binding.

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15. Inspect the caliper bolts (1) or guide pins for the following:
Binding
Seizing
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Looseness in the brake caliper mounting bracket (3)
Bent or damaged brake caliper mounting bolts or guide pins
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Cracked or torn boots (4)

Missing boots
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Bent or damaged brake caliper mounting bracket (3)

16. If any of the conditions listed are found then the brake caliper mounting hardware requires
replacement.
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4/26/23, 10:44 AM Rear Disc Brake Mounting and Hardware Inspection

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Note: Excess brake lubricant and trapped air must be expelled from the brake caliper guide pin bore
to allow full caliper movement and prevent premature brake pad wear.
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17. Gently pull the edge of the upper guide pin seal (1) away from the brake caliper guide pin (2) while
simultaneously pushing the brake caliper guide pin into the brake caliper bracket to expel any
trapped air and excess brake lubricant.
18. Repeat step 17 for the lower guide pin seal and brake caliper guide pin.
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19. With a clean shop towel, clean any excess brake lubricant from the guide pin seal and brake caliper
guide pin.
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20. Install the disc brake pads to the brake caliper mounting bracket.
21. Install the disc brake caliper to the brake caliper mounting bracket. Rear Brake Caliper Replacement
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22. Install the tire and wheel assembly. Tire and Wheel Removal and Installation
23. Remove the support and lower the vehicle.
24. Connect the battery negative cable. Battery Negative Cable Disconnection and Connection

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4/26/23, 10:19 AM Rear Disc Brake Pad Wear Sensor Replacement

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Disc Brakes | Repair Instructions |
Document ID: 5380882

Rear Disc Brake Pad Wear Sensor Replacement

Removal Procedure

1. Raise and support the vehicle. Lifting and Jacking the Vehicle
2. Remove the rear tire and wheel assembly. Tire and Wheel Removal and Installation

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3. Electrical Connector (1) @ Body Wiring Harness » Disconnect

4. Rear Disc Brake Pad Wear Sensor Clip (2) @ Underbody Rear Side Rail » Remove
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5. Rear Disc Brake Pad Wear Sensor (3) @ Rear Axle Mounted Bracket » Remove
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6. Rear Disc Brake Pad ©

Wear Sensor
2023 ClipMotors.
General (1) @ Rear Brakereserved.
All rights Caliper » Remove

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4/26/23, 10:19 AM Rear Disc Brake Pad Wear Sensor Replacement

7. Rear Disc Brake Pad Wear Sensor (2) @ Rear Disc Brake Pad » Remove

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8. Rear Disc Brake Pad Wear Sensor (1) @ Vehicle » Remove

Installation Procedure
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1. Rear Disc Brake Pad Wear Sensor (1) @ Vehicle » Install

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4/26/23, 10:19 AM Rear Disc Brake Pad Wear Sensor Replacement

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2. Rear Disc Brake Pad Wear Sensor (2) @ Rear Disc Brake Pad » Install
3. Rear Disc Brake Pad Wear Sensor Clip (1) @ Rear Brake Caliper » Install

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4. Rear Disc Brake Pad Wear Sensor (3) @ Rear Axle Mounted Bracket » Install
5. Rear Disc Brake Pad Wear Sensor Clip (2) @ Underbody Rear Side Rail » Install
6. Electrical Connector (1) @ Body Wiring Harness » Connect
7. Install the rear tire and wheel assembly. Tire and Wheel Removal and Installation
8. Lower the vehicle.
9. Using a scan tool, relearn the rear disc brake pad wear sensor. Brake Pad Life Monitoring Reset

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4/26/23, 10:18 AM Rear Disc Brake Pads Replacement (JBP)

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Disc Brakes | Repair Instructions |
Document ID: 5380880

Rear Disc Brake Pads Replacement (JBP)

Removal Procedure

Warning: The battery must be disconnected to prevent the brake master cylinder from
pressurizing the hydraulic system during its automated self diagnostic tests that can
possibly occur when a door is opened or the key transmitter is activated. Failure to
follow this precaution may cause personal injury.

Warning: Brake Dust Warning

Note:

Always replace disc brake pads in axle sets.

If installing new brake pads, a NEW brake pad wear sensor must be installed.

1. Inspect the fluid level in the brake master cylinder reservoir.

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2. If the brake fluid level is midway between the maximum-full point and the minimum allowable
level, no brake fluid needs to be removed before proceeding.
3. If the brake fluid level is higher than midway between the maximum-full point and the
minimum allowable level, remove brake fluid to the midway point before proceeding.
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4. Disconnect the battery negative cable. Battery Negative Cable Disconnection and Connection
5. Raise and support the vehicle. Lifting and Jacking the Vehicle
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6. Remove the rear tire and wheel assembly. Tire and Wheel Removal and Installation
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Note: If installing new rear disc brake pads, a NEW sensor must be installed.
7. Rear Disc Brake Pad Wear Sensor (1) @ Vehicle » Remove — Rear Disc Brake Pad Wear Sensor
Replacement

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4/26/23, 10:18 AM Rear Disc Brake Pads Replacement (JBP)

Note:
Do NOT use air or power tools to remove or install the brake caliper guide pin bolts.
Use hand tools ONLY.
Install an open end wrench to hold the caliper guide pin in line with the brake caliper
while removing or installing the caliper guide pin bolt. Allowing the open end wrench
to come in contact with the brake caliper will cause a pulsation when the brakes are
applied.
8. Rear Brake Caliper Guide Pin Bolt (1) » Remove
Caution: Support the brake caliper with heavy mechanic wire, or equivalent, whenever it is
separated from its mount and the hydraulic flexible brake hose is still connected.
Failure to support the caliper in this manner will cause the flexible brake hose to
bear the weight of the caliper, which may cause damage to the brake hose and in
turn may cause a brake fluid leak.
9. Pivot the brake caliper upward and secure with heavy mechanics wire, or equivalent. (2)

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10. Rear Brake Shoe Return Spring (1) » Remove [2x]

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4/26/23, 10:18 AM Rear Disc Brake Pads Replacement (JBP)

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11. Rear Disc Brake Inner Pad (1) @ Rear Brake Caliper Bracket (3) » Remove
12. Rear Disc Brake Outer Pad (2) @ Rear Brake Caliper Bracket (3) » Remove

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13. Rear Disc Brake Pad Retainer Spring (1) @ Rear Brake Caliper Bracket (2) » Remove [2x]
14. Inspect the rear disc brake mounting and hardware. Refer to Rear Disc Brake Mounting and
Hardware Inspection.

Installation Procedure

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4/26/23, 10:18 AM Rear Disc Brake Pads Replacement (JBP)

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1. Rear Disc Brake Pad Retainer Spring (1) @ Rear Brake Caliper Bracket (2) » Install [2x]

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Note: The disc brake pad equipped with wear sensor has to be mounted in lower position on
the inner side of the rotor.
2. Rear Disc Brake Outer Pad (2) @ Rear Brake Caliper Bracket (3) » Install
3. Rear Disc Brake Inner Pad (1) @ Rear Brake Caliper Bracket (3) » Install

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4/26/23, 10:18 AM Rear Disc Brake Pads Replacement (JBP)

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4. Rear Brake Shoe Return Spring (1) » Install [2x]

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5. Rotate the rear brake caliper (2) into position over the disc brake pads and to the caliper
mounting bracket.
Caution: Fastener Caution
Note: Install an open end wrench to hold the caliper guide pin in line with the brake caliper
while removing or installing the caliper guide pin bolt.
6. Rear Brake Caliper Guide Pin Bolt (1) » Install and tighten 40 Y (30 lb ft)

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4/26/23, 10:18 AM Rear Disc Brake Pads Replacement (JBP)

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Note: If installing new rear disc brake pads, a NEW sensor must be installed.
7. Rear Disc Brake Pad Wear Sensor (1) @ Vehicle » Install — Rear Disc Brake Pad Wear Sensor
Replacement
8. Install the rear tire and wheel assembly. Tire and Wheel Removal and Installation
9. Lower the vehicle. .c
10. Connect the battery negative cable. Battery Negative Cable Disconnection and Connection
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11. With the vehicle OFF, gradually apply the brake pedal approximately 2/3 of its travel distance.
12. Slowly release the brake pedal.
13. Wait 15 seconds, then gradually apply the brake pedal approximately 2/3 of its travel distance
ia

again until a firm brake pedal apply is obtained. This will properly seat the brake caliper
pistons and brake pads.
14. Inspect the fluid level in the brake master cylinder reservoir.
rd

15. Using a scan tool, relearn the rear disc brake pad wear sensor. Brake Pad Life Monitoring
Reset
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16. Burnish the brake pads and rotors. Brake Pad and Rotor Burnishing

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4/26/23, 10:17 AM Rear Disc Brake Pads Replacement

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Disc Brakes | Repair Instructions |
Document ID: 5236074

Rear Disc Brake Pads Replacement

Removal Procedure

Warning: The battery must be disconnected to prevent the brake master cylinder from
pressurizing the hydraulic system during its automated self diagnostic tests that can
possibly occur when a door is opened or the key transmitter is activated. Failure to
follow this precaution may cause personal injury.

Warning: Brake Dust Warning

Note: Always replace disc brake pads in axle sets.

1. Inspect the fluid level in the brake master cylinder reservoir.

2. If the brake fluid level is midway between the maximum-full point and the minimum allowable
level, no brake fluid needs to be removed before proceeding.

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3. If the brake fluid level is higher than midway between the maximum-full point and the
minimum allowable level, remove brake fluid to the midway point before proceeding.
4. Disconnect the battery negative cable. Battery Negative Cable Disconnection and Connection
5. Raise and support the vehicle. Lifting and Jacking the Vehicle
.c
6. Remove the rear tire and wheel assembly. Tire and Wheel Removal and Installation
gn
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rd
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Note:
Do NOT use air or power tools to remove or install the brake caliper guide pin bolts.
Use hand tools ONLY.
Install an open end wrench to hold the caliper guide pin in line with the brake caliper
while removing or installing the caliper guide pin bolt. Allowing the open end wrench
to come in contact with the brake caliper will cause a pulsation when the brakes are
applied.
7. Rear Brake Caliper Guide Pin Bolt (1) » Remove

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4/26/23, 10:17 AM Rear Disc Brake Pads Replacement

Caution: Support the brake caliper with heavy mechanic wire, or equivalent, whenever it is
separated from its mount and the hydraulic flexible brake hose is still connected.
Failure to support the caliper in this manner will cause the flexible brake hose to
bear the weight of the caliper, which may cause damage to the brake hose and in
turn may cause a brake fluid leak.
8. Pivot the brake caliper upward and secure with heavy mechanics wire, or equivalent. (2)

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9. Rear Brake Shoe Return Spring (1) » Remove [2x]
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10. Rear Disc Brake Inner Pad (1) @ Rear Brake Caliper Bracket (3) » Remove
11. Rear Disc Brake Outer Pad (2) @ Rear Brake Caliper Bracket (3) » Remove

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4/26/23, 10:17 AM Rear Disc Brake Pads Replacement

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12. Rear Disc Brake Pad Retainer Spring (1) @ Rear Brake Caliper Bracket (2) » Remove [2x]
13. Inspect the rear disc brake mounting and hardware. Refer to Rear Disc Brake Mounting and
Hardware Inspection.

Installation Procedure
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1. Rear Disc Brake Pad Retainer Spring (1) @ Rear Brake Caliper Bracket (2) » Install [2x]

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4/26/23, 10:17 AM Rear Disc Brake Pads Replacement

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Note: The disc brake pad equipped with wear sensor has to be mounted in lower position on
the inner side of the rotor.
2. Rear Disc Brake Outer Pad (2) @ Rear Brake Caliper Bracket (3) » Install
3. Rear Disc Brake Inner Pad (1) @ Rear Brake Caliper Bracket (3) » Install
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4. Rear Brake Shoe Return Spring (1) » Install [2x]

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4/26/23, 10:17 AM Rear Disc Brake Pads Replacement

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5. Rotate the rear brake caliper (2) into position over the disc brake pads and to the caliper
mounting bracket.
Caution: Fastener Caution
Note: Install an open end wrench to hold the caliper guide pin in line with the brake caliper
while removing or installing the caliper guide pin bolt.
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6. Rear Brake Caliper Guide Pin Bolt (1) » Install and tighten 40 Y (30 lb ft)
7. Install the rear tire and wheel assembly. Tire and Wheel Removal and Installation
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8. Lower the vehicle.
9. Connect the battery negative cable. Battery Negative Cable Disconnection and Connection
10. With the vehicle OFF, gradually apply the brake pedal approximately 2/3 of its travel distance.
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11. Slowly release the brake pedal.

12. Wait 15 seconds, then gradually apply the brake pedal approximately 2/3 of its travel distance
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again until a firm brake pedal apply is obtained. This will properly seat the brake caliper
pistons and brake pads.
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13. Inspect the fluid level in the brake master cylinder reservoir.
14. Burnish the brake pads and rotors. Brake Pad and Rotor Burnishing

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4/26/23, 10:47 AM Rear Wheel Speed Sensor Replacement

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Antilock Brake System | Repair Instructions |
Document ID: 5210527

Rear Wheel Speed Sensor Replacement

Removal Procedure

1. Raise and support the vehicle. Lifting and Jacking the Vehicle

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2. Rear Wheel Speed Sensor Wiring Harness (1) @ Rear Suspension Control Arm Bracket Support
» Unclip
3. Electrical Connector (2) @ Body Wiring Harness » Disconnect
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4. Rear Wheel Speed Sensor Wiring Harness (1) @ Rear Axle Mounted Bracket » Unclip

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4/26/23, 10:47 AM Rear Wheel Speed Sensor Replacement

5. Rear Wheel Speed Sensor Bolt (1) @ Rear Axle » Remove

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6. Rear Wheel Speed Sensor (2) @ Rear Axle » Remove

Installation Procedure

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1. Rear Wheel Speed Sensor (2) @ Rear Axle » Install

Caution: Refer to Fastener Caution.
2. Rear Wheel Speed Sensor Bolt (1) @ Rear Axle » Install and tighten 9 Y (80 lb in)

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4/26/23, 10:47 AM Rear Wheel Speed Sensor Replacement

3. Rear Wheel Speed Sensor Wiring Harness (1) @ Rear Axle Mounted Bracket » Install

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4. Electrical Connector (2) @ Body Wiring Harness » Connect

5. Rear Wheel Speed Sensor Wiring Harness (1) @ Rear Suspension Control Arm Bracket Support
» Install
6. Lower the vehicle.

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4/26/23, 11:07 AM Special Tools

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Hydraulic Brakes |
Special Tools and Equipment | Document ID: 6231085

Special Tools
Illustrations Tool Number/Description

CH–28662
Brake Pedal Effort Gauge

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CH–29532-A
.c Pressure Brake Bleeder
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CH–44894-A
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Brake Pressure Bleeder Adapter

CH 45405
Brake Pipe Flaring Kit

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4/26/23, 11:05 AM Special Tools

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Disc Brakes | Special Tools and Equipment |
Document ID: 5286268

Special Tools
Illustration Tool Number/Description

CH-41013
Rotor Resurfacing Kit

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CH–42450-A
Wheel Hub Resurfacing Kit
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CH-45101
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Hub and Wheel Runout Gauge

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CH–45101-100
Conical Brake Rotor Washers

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4/26/23, 11:05 AM Stability Control

2022 Buick Encore GX | | Brakes | Antilock Brake System |

Encore GX Service Manual N America 14739426 Schematic and Routing Diagrams |
Document ID: 5675078

Stability Control

K9 L
Body O
Control C
Module
D
E
S
C

X2 14 8

6817
YE
J210

1788 6817
BU/VT YE

X206 16 6

1788 6817
BU/VT YE

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J320

6817
YE

.c 8 2
S48E
Multifunction
Switch -
Center
Console
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1
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351
BK/WH
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G200
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4/26/23, 10:45 AM Steering Wheel Angle Sensor Centering

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Antilock Brake System | Repair Instructions |
Document ID: 4887047

Steering Wheel Angle Sensor Centering

Warning: An inaccurate or not centered steering angle sensor could limit the operation of the electric
power steering and may result in personal injury.

Note: The GDS2 calibration software must be updated to the latest diagnostic package for the scan tool
Reset and Learn functions to work correctly.

Note: Steering Wheel Angle Centering must be done with the steering wheel in the position that causes
straight vehicle motion. If the Steering Wheel Angle is more than 10 degrees out, an alignment
must be done first.

The steering angle sensor is internal to the Electronic Power Steering (EPS). Centering of the steering
angle sensor might be required after certain service procedures are performed. Do not perform the
Steering Wheel Position Sensor Centering unless directed by another service procedure. Some of these
procedures are as follows:

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Wheel alignment
Steering gear replacement
Steering column replacement
Collision or other physical damage
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The steering angle sensor centering procedure can be completed with a scan tool using the following
steps:
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1. Using the steering wheel, align the front wheels forward.
2. Apply the parking brake, or set the transmission in the Park position.
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3. Install the scan tool to the data link connector.

4. Ignition ON, engine OFF
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5. Select Steering Wheel Angle Sensor Centering in the Electronic Power Steering Module
Configuration/Reset Functions list.
6. Follow the scan tool directions to complete the Centering procedure.
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7. Select Steering Wheel Angle Sensor Offset Calibration in the Brake System Control Module
Configuration/Reset Functions list.
8. Follow the scan tool directions to complete the learn procedure.
9. Clear any DTCs that may be set.

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4/26/23, 11:03 AM Symptoms - Antilock Brake System

2022 Buick Encore GX | | Brakes | Antilock Brake System |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5073651

Symptoms - Antilock Brake System

Note: The following steps must be completed before using the symptom tables.

1. Perform the Diagnostic System Check - Vehicle before using the symptom tables in order to verify
that all of the following are true:
There are no DTCs set.
The control modules can communicate via the serial data link.
2. Review the system description and operation in order to familiarize yourself with the system
functions. Refer to ABS Description and Operation.

Visual/Physical Inspection

Inspect for aftermarket devices which could affect the operation of the ABS.
Inspect the easily accessible or visible system components, for obvious damage or

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conditions, which could cause the symptom.

Intermittent

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to
Testing for Intermittent Conditions and Poor Connections.

Symptom List
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Refer to a symptom diagnostic procedure from the following list in order to diagnose the
symptom:

ABS Indicator Malfunction

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Traction Control/Stability Control Indicator Malfunction

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4/26/23, 10:39 AM Symptoms - Brake Pad Life Monitor

2022 Buick Encore GX | | Brakes | Disc Brakes |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 4958461

Symptoms - Brake Pad Life Monitor

Note: The following steps must be completed before using the symptom diagnostic tables.

1. Before using the symptom diagnostic tables, perform the Diagnostic System Check - Vehicle in order
to determine that there are no DTCs set, and that the control modules can communicate via the
serial data link.
2. Review the system operation in order to understand the system functions. Refer to the following
description and operations:
Brake Pad Life Monitoring Description and Operation

Visual/Physical Inspection

Inspect for aftermarket devices which can affect the operation of the instrument panel
cluster or the audible warning systems.
Inspect the accessible system components or the visible system components for obvious

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damage or for obvious conditions which can cause the symptom.
Inspect for the proper fluid levels.

Intermittent
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Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to
Testing for Intermittent Conditions and Poor Connections
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Symptom List

Refer to a symptom diagnostic procedure from the following list in order to diagnose the
symptom:
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Brake Pad Life Monitoring Malfunction

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4/26/23, 11:15 AM Symptoms - Hydraulic Brakes

2022 Buick Encore GX | | Brakes | Hydraulic Brakes |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5286120

Symptoms - Hydraulic Brakes

Note: The following steps must be completed before using the symptom tables.

1. Perform the Brake System Vehicle Road Test before using the hydraulic brake symptom tables in
order to duplicate the customers concern.
2. Review the system operation in order to familiarize yourself with the system functions. Refer to the
following:
Hydraulic Brake System Description and Operation
Brake Assist System Description and Operation
ABS Description and Operation

Visual/Physical Inspection

Inspect for aftermarket devices which could affect the operation of the hydraulic brake

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system.
Inspect the easily accessible or visible system components, for obvious damage or
conditions, which could cause the symptom.

Intermittent
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Faulty electrical connections or wiring may be the cause of intermittent conditions. Testing for
Intermittent Conditions and Poor Connections
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Symptom List

Refer to a symptom diagnostic procedure from the following list in order to diagnose the
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symptom:

Brake Warning Indicator Malfunction

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Brake Pulsation
Brake System Noise
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Braking Action Uneven - Pulls to One Side

Braking Action Uneven - Front to Rear
Brake Pedal Excessive Travel
Brake Pedal Excessive Effort
Brakes Drag
Brake System Slow Release
Brake Fluid Loss

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4/26/23, 11:09 AM Symptoms - Park Brake

2022 Buick Encore GX | | Brakes | Park Brake |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5236116

Symptoms - Park Brake

Visual/Physical Inspection

Inspect for aftermarket devices which could affect the operation of the park brake system.
Inspect the easily accessible or visible system components for obvious damage or conditions
which could cause the symptom.

Symptom

Refer to the following procedure in order to diagnose the symptom:

Park Brake Will Not Hold or Release

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4/26/23, 11:03 AM Traction Control/Stability Control Indicator Malfunction

2022 Buick Encore GX | | Brakes | Antilock Brake System |

Encore GX Service Manual N America 14739426
Diagnostic Information and Procedures | Document ID: 5402754

Traction Control/Stability Control Indicator Malfunction

Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure
Instructions

DTC Descriptor

DTC B2745 Traction Control Switch Circuit

Symptom Byte Information: Symptom Byte List

Diagnostic Fault Information

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Short to Open/High Short to Signal
Circuit Ground Resistance Voltage Performance

Signal

Ground
.c B2745 02

—
1

1 —
1 —

—
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1. Traction Control Switch = Inoperative
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Circuit/System Description
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For an overview of the component/system, refer to: ABS Description and Operation

Circuit Description
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The control module input circuit has an internal

Signal
resistance connected to 12 V.

Ground Chassis Ground

Component Description

The control module contains a microprocessor used

K9 Body Control Module
to process input data to control outputs.

S48E Multifunction Switch - Center When the traction control switch is pressed once, the
Console BCM will request the EBCM via serial data to disable
the traction control. When the switch is pressed for 5
s, the BCM will request the EBCM to disable the
stability control. The EBCM will request the
instrument cluster via serial data to turn the
"TractionAllControl
© 2023 General Motors. rights Off" and "Stability Control Off"
reserved.

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4/26/23, 11:03 AM Traction Control/Stability Control Indicator Malfunction

Component Description

indicators On to notify the driver of the deactivation.

When the switch is pressed once more, the traction
control and stability control will be activated again.

Conditions for Running the DTC

Ignition On

Conditions for Setting the DTC

The control module detects a short to ground.

Actions Taken When the DTC Sets

The body control module ignores the traction control switch input signal.

Conditions for Clearing the DTC

The conditions for setting the DTC no longer exist.

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A history DTC will clear after 40 consecutive malfunction-free ignition cycles.

Reference Information
Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

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Master Electrical Component List

Electrical Information Reference

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Circuit Testing
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Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs
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Scan Tool Reference

Control Module References

Circuit/System Verification

1. Ignition » On / Vehicle » In Service Mode

2. Perform the scan tool control function: All Indicators Command » On and Off
⇒ Traction/Stability Control Indicator = OFF
Replace the component: P16 Instrument Cluster
⇓ Traction/Stability Control Indicator = ON
3. Operate the component: S48E Multifunction Switch - Center Console » Active
Verify the scan tool parameter: Traction Control Switch @ K9 Body Control Module = Active
⇒ If not the specified state
Refer to: Circuit/System Testing
⇓ If the specified state
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4/26/23, 11:03 AM Traction Control/Stability Control Indicator Malfunction

4. All OK.

Circuit/System Testing

Note: It may take up to 2 min for all vehicle systems to power down before an accurate
ground or low reference circuit continuity test can be performed.
1. Ignition/Vehicle & All vehicle systems » Off
2. Disconnect the electrical connector: S48E Multifunction Switch - Center Console
3. Test for less than 10 Ω between the test points: Ground circuit terminal 1 & Ground
⇒ If 10 Ω or greater
3.1. Disconnect the ground connection: G200
3.2. Test for less than 2 Ω between the test points: Ground circuit terminal 1 @ S48E
Multifunction Switch - Center Console & Terminal G200
⇒ If 2 Ω or greater » Repair the open/high resistance in the circuit.
⇒ If less than 2 Ω » Repair the open/high resistance in the ground connection.
⇓ If less than 10 Ω
4. Ignition » On / Vehicle » In Service Mode

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5. Verify the scan tool parameter: Traction Control Switch @ K9 Body Control Module = Inactive
⇒ If not the specified state
5.1. Ignition/Vehicle » Off
5.2. Disconnect the electrical connector: X2 Harness Connector @ K9 Body Control Module
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5.3. Test for infinite resistance between the test points: Signal circuit terminal 14 @ X2
Harness Connector & Ground
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⇒ If less than infinite resistance » Repair the short to ground on the circuit.
⇒ If infinite resistance » Replace the component: K9 Body Control Module
⇓ If the specified state
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6. Connect a 3 A fused jumper wire between the test points: Signal circuit terminal 8 & Ground
circuit terminal 1
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7. Verify the scan tool parameter: Traction Control Switch @ K9 Body Control Module = Active
⇒ If not the specified state
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7.1. Ignition/Vehicle » Off & Remove » Jumper wire(s)

7.2. Disconnect the electrical connector: X2 Harness Connector @ K9 Body Control Module
7.3. Ignition » On / Vehicle » In Service Mode
7.4. Test for less than 1 V between the test points: Signal circuit terminal 14 @ X2 Harness
Connector & Ground
⇒ If 1 V or greater » Repair the short to voltage on the circuit.
⇓ If less than 1 V
7.5. Ignition/Vehicle » Off
7.6. Test for less than 2 Ω between the test points: @ S48E Multifunction Switch - Center
Console & Terminal 14 @ X2 Harness Connector
⇒ If 2 Ω or greater » Repair the open/high resistance in the circuit.
⇒ If less than 2 Ω » Replace the component: K9 Body Control Module
⇓ If the specified state
8. Test or replace the component: S48E Multifunction Switch - Center Console

Component Testing © 2023 General Motors. All rights reserved.

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4/26/23, 11:03 AM Traction Control/Stability Control Indicator Malfunction

1. Ignition/Vehicle » Off
2. Disconnect the electrical connector: S48E Multifunction Switch - Center Console
3. Test for infinite resistance between the test points: Signal terminal 8 & Ground terminal 1 —
The switch is in the open position.
⇒ If less than infinite resistance
Replace the component: S48E Multifunction Switch - Center Console
⇓ If infinite resistance
4. Test for less than 2 Ω between the test points: Signal terminal 8 & Ground terminal 1 — The
switch is in the closed position.
⇒ If 2 Ω or greater
Replace the component: S48E Multifunction Switch - Center Console
⇓ If less than 2 Ω
5. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair

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Verification

For control module replacement, programming, and setup refer to: Control Module References

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4/26/23, 10:45 AM Vehicle Dynamic Sensor Offset Calibration

2022 Buick Encore GX | | Brakes |

Encore GX Service Manual N America 14739426 Antilock Brake System | Repair Instructions |
Document ID: 5042609

Vehicle Dynamic Sensor Offset Calibration

The vehicle dynamic sensor does not require calibration often. Calibrating the vehicle dynamic sensor
might be required after certain service procedures are performed. Some of these procedures are as
follows:

Inflatable Restraint Sensing and Diagnostic Module replacement

Brake System Control Module replacement.

The vehicle dynamic sensor learn procedure can be completed with a scan tool using the following
steps:

1. Place vehicle on a level surface

2. Apply the parking brake, or set the transmission in the Park position.
3. Install the scan tool to the data link connector.

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4. Ignition ON, engine OFF.
5. Select Vehicle Dynamic Sensor Offset Calibration in the Inflatable Restraint Sensing and Diagnostic
Module Configuration/Reset Functions list.
6. Follow the scan tool directions to complete the calibration procedure.

Configuration/Reset Functions list.

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7. Select Vehicle Dynamic Sensor Offset Calibration in the Brake System Control Module

8. Follow the scan tool directions to complete the calibration procedure.

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9. Clear any DTCs that may be set.
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4/26/23, 11:05 AM Wheel Speed Sensors

2022 Buick Encore GX | Encore GX Service Manual N America 14739426 | Brakes | Antilock Brake System | Schematic and Routing Diagrams |
Document ID: 5675077

Wheel Speed Sensors

L
O
C

D
E
S
C

1 1 1 1
B5LF B5RF B5LR B5RR
Wheel Wheel Wheel Wheel
Speed Speed Speed Speed
Sensor - Sensor - Sensor - Sensor -
Left Front Right Left Rear Right
2 2 Front 2 2 Rear

7064 830 7065 872

GY/WH GY GY/BN YE

X180 4 3 X181 4 3

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7064 830 7065 872 7127 884 7128 882
GY/WH GY GY/BN YE GY/BK BU GY/YE VT

9 9 9 9

21 7
.c 42 26 39 23 20 37
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K160
12V 12V 12V 12V Brake
System
Control
Module
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