35B-1

GROUP 35B

ANTI-LOCK
BRAKING SYSTEM
(ABS)
CONTENTS

GENERAL DESCRIPTION. . . . . . . . . 35B-2 HYDRAULIC UNIT . . . . . . . . . . . . . . . 35B-118

REMOVAL AND INSTALLATION . . . . . . . . 35B-118
ANTI-LOCK BRAKING SYSTEM (ABS)
DIAGNOSIS . . . . . . . . . . . . . . . . . . . . 35B-4 ABS SENSOR. . . . . . . . . . . . . . . . . . . 35B-120
INTRODUCTION TO ANTI-LOCK BRAKING REMOVAL AND INSTALLATION . . . . . . . . 35B-120
SYSTEM DIAGNOSIS . . . . . . . . . . . . . . . . 35B-4 INSPECTION. . . . . . . . . . . . . . . . . . . . . . . . 35B-121
ABS DIAGNOSTIC TROUBLESHOOTING
STRATEGY. . . . . . . . . . . . . . . . . . . . . . . . . 35B-4 G-SENSOR . . . . . . . . . . . . . . . . . . . . . 35B-122
SYMPTOM CHART. . . . . . . . . . . . . . . . . . . 35B-68 REMOVAL AND INSTALLATION . . . . . . . . 35B-122
SYMPTOM PROCEDURES . . . . . . . . . . . . 35B-69 INSPECTION. . . . . . . . . . . . . . . . . . . . . . . . 35B-123
DATA LIST REFERENCE TABLE . . . . . . . 35B-106
ACTUATOR TEST REFERENCE TABLE. . 35B-107
STEERING ANGULAR VELOCITY
SENSOR* . . . . . . . . . . . . . . . . . . . . . . 35B-124
TERMINAL VOLTAGE CHECK CHART . . . 35B-108
REMOVAL AND INSTALLATION . . . . . . . . 35B-124
SPECIAL TOOLS. . . . . . . . . . . . . . . . 35B-111
SPECIFICATIONS . . . . . . . . . . . . . . . 35B-125
ON-VEHICLE SERVICE. . . . . . . . . . . 35B-112 FASTENER TIGHTENING
ABS SENSOR OUTPUT VOLTAGE SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . 35B-125
MEASUREMENT . . . . . . . . . . . . . . . . . . . . 35B-112 GENERAL SPECIFICATIONS . . . . . . . . . . 35B-125
HYDRAULIC UNIT CHECK . . . . . . . . . . . . 35B-114 SERVICE SPECIFICATION . . . . . . . . . . . . 35B-125
IN THE EVENT OF A DISCHARGED
BATTERY . . . . . . . . . . . . . . . . . . . . . . . . . . 35B-117

WARNINGS REGARDING SERVICING OF SUPPLEMENTAL RESTRAINT SYSTEM (SRS) EQUIPPED VEHICLES

WARNING
• Improper service or maintenance of any component of the SRS, or any SRS-related component, can lead to
personal injury or death to service personnel (from inadvertent firing of the air bag) or to the driver and
passenger (from rendering the SRS inoperative).
• Service or maintenance of any SRS component or SRS-related component must be performed only at an
authorized MITSUBISHI dealer.
• MITSUBISHI dealer personnel must thoroughly review this manual, and especially its GROUP 52B - Supplemental
Restraint System (SRS) before beginning any service or maintenance of any component of the SRS or any SRS-
related component.
NOTE
The SRS includes the following components: SRS air bag control unit, SRS warning light, front impact sensors, air bag module,
clock spring, and interconnecting wiring. Other SRS-related components (that may have to be removed/installed in connection
with SRS service or maintenance) are indicated in the table of contents by an asterisk (*).
35B-2 ANTI-LOCK BRAKING SYSTEM (ABS)
GENERAL DESCRIPTION

GENERAL DESCRIPTION
M1352000100379
Top components such as Bremboä brakes, EBD and
sports ABS improve braking power and braking sta-
bility.
SPORTS ABS EBD (Electronic Brake-force Distribution
• 4-wheel independent control optimizes the brake system)
force to each wheel to achieve a balance of • Rear brake power is electronically controlled to
improved braking force and braking stability. optimize performance in accordance with road
• A steering angular velocity sensor was added to and load conditions and to ensure optimal distri-
monitor the steering angle status. Braking force is bution of braking force between the front and rear
altered in response to the steering status to brakes.
improve the quality of steering when braking in • Rear brake fluid pressure control employs a
corners. brake modulator hydraulic unit solenoid valve that
• The steering angular velocity sensor, lateral G- made it possible to eliminate the pressure control
sensor and longitudinal G-sensor accurately valves (proportioning valves).
monitor driving conditions and optimize ABS con- • Effective use of rear wheel brake force reduces
trol to match the specific driving conditions. temperature build-up in the front brakes under
hard braking conditions.
• Independent control of the left and right rear
brakes when braking during cornering achieves a
balance of improved vehicle stability and braking
force.

CONSTRUCTION DIAGRAM

6
4

AC209828
8

7, 10

10067AU

1
2
9 5 3
1
AC211546 AB

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 ANTI-LOCK BRAKING SYSTEM (ABS)
GENERAL DESCRIPTION
35B-3

NAME OF PART NO. OUTLINE OF FUNCTION

Sensor ABS sensor 1 Sends alternating current signals at frequencies which are proportional
to the rotation speeds of each wheel to the ABS-ECU.
Lateral G-sensor 2 Sends data on vehicle’s rate of lateral acceleration to the ABS-ECU.
Longitudinal G- 3 Sends data on vehicle’s rate of longitudinal acceleration to the ABS-
sensor ECU.
Steering angular 4 Sends data on steering wheel angle to the ABS-ECU.
velocity sensor Indicates the ABS-ECU when steering wheel is in straight-ahead
position.
Stoplight switch 5 Sends a signal to the ABS-ECU to indicate whether the brake pedal is
depressed or not.
Parking brake 6 Sends a signal to the ABS-ECU to indicate whether the parking brake
switch lever is pulled or not.
Actuator Hydraulic unit 7 Drives the solenoid valves according to signals from the ABS-ECU in
order to control the brake hydraulic pressure for each wheel.
ABS warning 8 Illuminates in response to signals from the ABS-ECU when a problem
light develops in the system.
Data link connector 9 Outputs the diagnostic trouble codes and allows communication with
the scan tool.
Brake modulator (ABS-ECU) 10 Controls actuators (described above) based on the signals coming from
each sensor.
Controls the self-diagnosis and fail-safe functions.
Controls the diagnostic function (scan tool compatible).
. .

System Check Sound Long Stopping Distances on Loose Road

When starting the engine, a thudding sound can Surfaces
sometimes be heard coming from the engine com- When braking on loose surfaces like snow-covered
partment. This is a normal sound during the ABS or gravel roads, the stopping distance can be longer
self-check. for an ABS-equipped vehicle than the stopping dis-
.
tance for a vehicle with a conventional brake system.
ABS Operation Sounds and Sensations .

During normal operation, the ABS makes several Shock at starting check
sounds that may seem unusual at first: Shock may be felt when the brake pedal is lightly
• A whining sound is caused by the ABS hydraulic pressed while driving at a low speed. This is a nor-
unit motor. mal characteristic because the ABS system opera-
• When pressure is applied to the brake pedal, the tion check is carried out when vehicle speed is 8 km/
pulsation of the pedal causes a scraping sound. h (5 mph) or less.
• When the brakes are applied firmly, the ABS
operates, rapidly applying and releasing the
brakes many times per second. This repeated
application and release of braking forces can
cause the suspension to make a thumping sound
and the tires to squeak.

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35B-4 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

INTRODUCTION TO ANTI-LOCK BRAKING SYSTEM DIAGNOSIS
M1352012500341
The anti-lock brake system (ABS) operates differ- Some operational characteristics may seem to be
ently from conventional brake systems. These differ- malfunctions, but they are simply signs of normal
ences include sounds, sensations, and vehicle ABS operation. When diagnosing the ABS system,
performance that owners and service technicians keep these operational characteristics in mind.
who are not familiar with ABS may not be used to. Inform the owner of the kind of performance charac-
teristics to expect from an ABS-equipped vehicle.
ABS Diagnostic Trouble Code Detection When you check if an ABS DTC will be displayed
Conditions again after the DTC has been erased, you should
duplicate the ABS DTC set conditions. Depending on
ABS diagnostic trouble codes (ABS DTCs) are set
the detection timing and set conditions for the spe-
under different conditions, depending on the mal-
cific ABS DTC, you must either drive the vehicle or
function detected. Most ABS DTCs will only be set
turn the engine off and restart it. To set the proper
during vehicle operation. Some ABS DTCs will also
conditions for that DTC again, refer to "ABS DTC
be set during the ABS self-check immediately after
SET CONDITIONS" for each ABS DTC that you are
the engine is started.
trying to reset.
ABS DIAGNOSTIC TROUBLESHOOTING STRATEGY
M1352011100470
Use these steps to plan your diagnostic strategy. If • If the basic brake system is not operating prop-
you follow them carefully, you will be sure that you erly, refer to the GROUP 35A, Basic Brake Sys-
have exhausted most of the possible ways to find an tem Diagnosis P.35A-3.
ABS fault. • If the basic brake system is operating properly,
1. Gather information about the problem from the refer to P.35B-68.
customer. 6. If there is an ABS DTC, record the number of the
2. Verify that the condition described by the DTC, then erase the DTC from the memory using
customer exists. the scan tool.
3. Check the vehicle for any ABS DTC. 7. Recreate the ABS DTC set conditions to see if the
4. If you cannot verify the condition and there are no same ABS DTC will set again.
ABS DTCs, the malfunction is intermittent. Refer • If the same ABS DTC sets again, perform the
to GROUP 00, How to use Troubleshooting/ diagnostic procedures for the DTC. Refer to
Inspection Service Points − How to Cope with P.35B-10.
Intermittent Malfunctions P.00-6. • If you cannot get the same ABS DTC to set
5. If you can verify the condition but there are no again, the malfunction is intermittent. Refer to
ABS DTCs, or the system cannot communicate GROUP 00, How to use Troubleshooting/Inspec-
with the scan tool, check that the basic brake tion Service Points − How to Cope with Intermit-
system is operating properly. tent Malfunctions P.00-6.

DIAGNOSIS FUNCTION
M1352011200507

HOW TO CONNECT THE SCAN TOOL (MUT-III)

Required Special Tools:
• MB991958: Scan Tool (MUT-III Sub Assembly)
• MB991824: V.C.I.
• MB991827: USB Cable
• MB991911: Main Harness B

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 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
35B-5
CAUTION
To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
1. Ensure that the ignition switch is at the "LOCK" (OFF)
position.
2. Start up the personal computer.
3. Connect special tool MB991827 to special tool MB991824
16-PIN and the personal computer.
4. Connect special tool MB991911 to special tool MB991824.
5. Connect special tool MB991911 to the data link connector.
6. Turn the power switch of special tool MB991824 to the "ON"
position.
MB991911 NOTE: When special tool MB991824 is energized, special
tool MB991824 indicator light will be illuminated in a green
color.
MB991824
7. Start the MUT-III system on the personal computer.
NOTE: Disconnecting scan tool MB991958 is the reverse of the
connecting sequence, making sure that the ignition switch is at
the "LOCK" (OFF) position.

MB991827 AK204071AB

HOW TO READ AND ERASE DIAGNOSTIC

TROUBLE CODE
.

<Reading DTC by the ABS Warning Light and Special Tool

MB991529>
Required Special Tool:
• MB991529: Diagnostic Trouble Code Check Harness
1. Use special tool MB991529 to ground number 1 terminal of
DATA LINK the data link connector.
CONNECTOR
CAUTION
Do not depress the brake pedal after the ignition switch is
turned "ON". If the brake pedal is depressed while the ABS
is inoperative and the ignition switch is "ON," the ABS
MB991529
warning light will remain on. Because of this, diagnostic
1 2 3 4 5 6 7 8 trouble codes will not be read out.
9 10 11 12 13 14 15 16
2. Turn the ignition switch to the "ON" position.
AC211895AB

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35B-6 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

3. Read out a diagnostic trouble code by observing how the

warning light flashes.

ABS WARNING LIGHT AC211552AB

WHEN THE DIAGNOSTIC TROUBLE CODE NO. 24 WHEN NO DIAGNOSTIC TROUBLE CODE IS
IS OUTPUT OUTPUT

0.5s 0.25s
1.5s
0.5s
ILLUMINATED ILLUMINATED
SWITCHED SWITCHED
OFF OFF
PAUSE TENS PLACE UNITS
ACX01778 AB
TIME 3s SIGNAL DIVISION SIGNAL
2s
ACX01777AB

4. Turn the ignition switch to the "LOOK" (OFF) position.

5. Disconnect special tool MB991529.
.

<Erasing DTC by Special Operation for Brake Pedal>

Required Special Tool:
• MB991529: Diagnostic Trouble Code Check Harness
1. Use special tool MB991529 to ground number 1 terminal of
DATA LINK the data link connector.
CONNECTOR
NOTE: If the ABS-ECU functions have stopped due to the
fail-safe function, the diagnostic trouble code cannot be
erased.
MB991529

1 2 3 4 5 6 7 8
9 10 11 12 13 14 15 16

AC211895AB

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 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
35B-7

ON
IGNITION SWITCH
OFF

ON
STOPLIGHT SWITCH
OFF

ON
ABS WARNING LIGHT
OFF
3s

DIAGNOSTIC TROUBLE
CODE MEMORY
WITHIN WITH- WITH- WITH- WITH- WITH- WITH- WITH- WITH- WITH- WITH-
3s IN 1 s IN 1 s IN 1 s IN 1 s IN 1 s IN 1 s IN 1 s IN 1 s IN 1 s IN 1 s 1s

1ST 2ND 3RD 4TH 5TH 6TH 7TH 8TH 9TH 10TH
ERASING
COMPLETED
AC000937 AB
2. Depress the brake pedal and hold it.
3. Turn the ignition switch to the "ON" position.
4. After turning the ignition switch to the "ON," release the
pedal within three seconds. Repeat this process of pressing
and releasing the brake pedal 10 continuous times.
5. Turn the ignition switch to the "LOOK" (OFF) position.
6. Disconnect special tool MB991529.
.

<Reading/Erasing by scan tool MB991502>

Required Special Tool:
• MB991502: Scan Tool (MUT-II)
CAUTION
To prevent damage to scan tool MB991502, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991502.
NOTE: If Battery positive voltage is low, diagnostic trouble
16-PIN
codes may not be output. Be sure to check the battery and
charging system before continuing.
1. Connect scan tool MB991502 to the data link connector.
MB991502 2. Turn the ignition switch to the "ON" position.
3. Read the diagnostic trouble codes for ABS.
AK204070AB
4. Refer to the DIAGNOSTIC TROUBLE CODE
CHART(P.35B-10).
5. Turn the ignition switch to the "LOCK" (OFF) position and
then back to "ON" again.
6. Erase the diagnostic trouble code(s) using MB991502
screen prompts.
7. Confirm that the diagnostic trouble code output is normal.
8. Turn the ignition switch to the "LOCK" (OFF) position.
9. Disconnect scan tool MB991502 from the data link
connector.
.

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35B-8 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

<Reading/Erasing by scan tool MB991958>

Required Special Tools:
• MB991958: Scan Tool (MUT-lll Sub Assembly)
• MB991824: V.C.I
• MB991827: USB Cable
• MB991911: Main Harness B
CAUTION
To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
NOTE: If the battery voltage is low, diagnostic trouble codes will
not be set. Check the battery if scan tool MB991958 does not
display.
1. Connect scan tool MB991958 to the data link connector.
2. Turn the ignition switch to "ON" position.
3. Select "Interactive Diagnosis" from the start-up screen.
4. Select "System select."
16-PIN
5. Choose "ABS" from the "CHASSIS" tab.
6. Select "Diagnostic Trouble Code."
7. If a DTC is set, it is shown.
8. Choose "Erase DTCs" to erase the DTC.

MB991911

MB991824

MB991827 AK204071AB

HOW TO READ DATA LIST (MUT-III)

.

Required Special Tools:

• MB991958: Scan Tool (MUT-lll Sub Assembly)
• MB991824: V.C.I.
• MB991827: USB Cable
• MB991911: Main Harness B

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 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
35B-9
CAUTION
To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
1. Connect scan tool MB991958 to the data link connector.
2. Turn the ignition switch to "ON" position.
3. Select "Interactive Diagnosis" from the start-up screen.
4. Select "System select."
16-PIN
5. Choose "ABS" from the "CHASSIS" tab.
6. Select "Data List."
7. Choose an appropriate item and select the "OK" button

MB991911

MB991824

MB991827 AK204071AB

HOW TO PERFORM ACTUATOR TEST (MUT-III)

Required Special Tools:
• MB991958: Scan Tool (MUT-III Sub Assembly)
• MB991824: V.C.I.
• MB991827: Usb Cable
• MB991911: Main Harness B

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35B-10 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

CAUTION
To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
1. Connect scan tool MB991958 to the data link connector.
2. Turn the ignition switch to the "ON" position.
3. Select "Interactive Diagnosis" from the start-up screen.
4. Select "System select."
16-PIN
5. Choose "ABS" from the "CHASSIS" tab.
6. Choose "Actuator Test" from "ABS" screen.
7. Choose an appropriate item.

MB991911

MB991824

MB991827 AK204071AB

DIAGNOSTIC TROUBLE CODE CHART

M1352011300504
Follow the inspection chart that is appropriate for the
diagnostic trouble code.
DTC INSPECTION ITEM REFERENCE PAGE
11 Open circuit or short-circuit in ABS sensor (FR) P.35B-12
12 Open circuit or short-circuit in ABS sensor (FL)
13 Open circuit or short-circuit in ABS sensor (RR)
14 Open circuit or short-circuit in ABS sensor (RL)
16 Abnormal drop or rise in ABS-ECU power supply voltage P.35B-26
21 ABS sensor (FR) system P.35B-12
22 ABS sensor (FL) system
23 ABS sensor (RR) system
24 ABS sensor (RL) system
32 Longitudinal G-sensor system P.35B-31
41 Solenoid valve (FR) system P.35B-42
42 Solenoid valve (FL) system
43 Solenoid valve (RR) system
44 Solenoid valve (RL) system
51 Valve relay ON problem Replace the brake
modulator hydraulic unit
(Integrated with ABS-
ECU).

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 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
35B-11
DTC INSPECTION ITEM REFERENCE PAGE
52 Valve relay OFF problem P.35B-42
53 Motor relay OFF problem
54 Motor relay ON problem Replace the brake
modulator hydraulic unit
(Integrated with ABS-
ECU).
55 Motor system P.35B-42
63 ABS-ECU abnormality Replace the brake
modulator hydraulic unit
(Integrated with ABS-
ECU).
71 Lateral G-sensor system P.35B-46
81 Steering angular velocity sensor (ST-1) system P.35B-57
82 Steering angular velocity sensor (ST-2) system
83 Steering angular velocity sensor (ST-N) system
NOTE: diagnostic trouble code No.16, 52, 63
.
• Code No. 16 is cleared from the memory by turning the ignition switch to the "ACC" position. When the
system is properly reset, this code is also cleared from the memory.
• Code No. 52 and 63 are cleared from the memory by turning the ignition switch to the "ACC" position.

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35B-12 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

DIAGNOSTIC TROUBLE CODE PROCEDURES

DTC 11, 12, 13, 14: ABS Sensor (Open Circuit or Short Circuit)
DTC 21, 22, 23, 24: ABS Sensor System

ABS Sensor Circuit

ABS-ECU

(FRONT: LH) (FRONT: RH) (REAR: LH) (REAR: RH)

ABS SENSOR

AC211704AB

CONNECTOR: A-03 CONNECTOR: A-27

A-03 (B) A-27 (B)

AC211899AB AC211900AB

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 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
35B-13
CONNECTOR: A-29 CONNECTOR: B-118

B-118 (B)

A-29 (B)

AC211262 AW AC211901AB

CONNECTORS: C-111, C-113 CONNECTOR: C-122

C-122 (L)
C-113
C-111 AC211266 BL AC211265 CU

CONNECTORS: D-06, D-13, D-34

D-06 (B)

D-34

D-13 (B)

AC211902AB

. .

CIRCUIT OPERATION ABS DTC SET CONDITIONS

• A toothed ABS rotor generates a voltage pulse as • DTCs 11, 12, 13, 14 are output when signal is not
it moves across the pickup field of each ABS sen- input due to breakage of the wires of one or more
sor. of the four ABS sensors.
• The amount of voltage generated at each wheel • DTCs 21, 22, 23, 24 are output in the following
is determined by the clearance between the ABS cases:
rotor teeth and the ABS sensor, and by the speed • Open circuit is not found but no input is
of rotation. received by one or more of the four ABS sen-
• The ABS sensors transmit the frequency of the sors at 10 km/h (6 mph) or more.
voltage pulses and the amount of voltage gener- • Sensor output drops due to a malfunctioning
ated by each pulse to the ABS-ECU. ABS sensor or warped ABS rotor.
• The hydraulic unit modulates the amount of brak- .

ing force individually applied to each wheel cylin-

der.

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35B-14 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

TROUBLESHOOTING HINTS DTC 21, 22, 23, 24

The most likely causes for these DTCs to set are: • Malfunction of the ABS sensor
DTC 11, 12, 13, 14 • Damaged wiring harness or connector
• Malfunction of the ABS sensor • Malfunction of the brake modulator hydraulic unit
• Damaged wiring harness or connector (integrated with ABS-ECU)
• Malfunction of the brake modulator hydraulic unit • Malfunction of the ABS rotor
(integrated with ABS-ECU) • Malfunction of the wheel bearing
• Excessive clearance between the ABS sensor
and ABS rotor
.

DIAGNOSIS
Required Special Tools:
• MB991223: Harness Set
• MB991529: Diagnostic Trouble Code Check Harness
• MB991502: Scan Tool (MUT-II)
• MB991958: Scan Tool (MUT-III Sub Assembly)
• MB991824: V.C.I.
• MB991827: USB Cable
• MB991910: Main Harness A
.

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 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
35B-15

STEP 1. Using scan tool MB991502 or MB991958, check

data list item 11, 12, 13, 14: ABS sensor.
CAUTION
To prevent damage to scan tool MB991502 or MB991958,
always turn the ignition switch to the "LOOK" (OFF) posi-
tion before connecting or disconnecting scan tool
MB991502 or MB991958.
(1) Connect scan tool MB991502 or MB991958 as shown in
the illustration.
(2) Start the engine.
(3) Set scan tool MB991502 or MB991958 to the data reading
16-PIN mode, and check the data list items by driving the vehicle.
• Item 11 (DTC 11 or 21 is set): Front right ABS sensor
• Item 12 (DTC 12 or 22 is set): Front left ABS sensor
• Item 13 (DTC 13 or 23 is set): Rear right ABS sensor
MB991502
• Item 14 (DTC 14 or 24 is set): Rear left ABS sensor
AC207179AB
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the ABS sensor input normal?
YES : This malfunction is intermittent. Refer to GROUP 00,
How to Use Troubleshooting/Inspection Service
Points − How to Cope With Intermittent Malfunction
16-PIN
P.00E-2.
NO : Go to Step 2.

MB991911

MB991824

MB991827 AC210056AC

STEP 2. Check the ABS sensor installation.

Q: Is the ABS sensor bolted securely in place at the front
knuckle or the rear knuckle?
YES : Go to Step 3.
NO : Install it properly (Refer to P.35B-120). Then go to
Step 15 .

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35B-16 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

STEP 3. Inspect the ABS sensor and/or ABS rotor.

Refer to P.35B-121.
Check items:
• ABS sensor internal resistance: 1.24 − 1.64 kΩ
• Insulation between the ABS sensor body and the connector
terminals
• Toothed ABS rotor check
Q: Is the ABS sensor or ABS rotor damaged?
YES : Replace it (Refer to P.35B-120). Then go to Step 15.
NO : Go to Step 4.

STEP 4. Check ABS sensor circuit. Measure the resistance

at the ABS-ECU connector B-118.
CONNECTOR: B-118 (1) Disconnect the connector B-118 and measure at the
harness side.
(2) Measure the resistance between the ABS-ECU connector
terminals.
B-118 (B)
• If DTC 11 or 21 is set: between terminals 29 and 30
• If DTC 12 or 22 is set: between terminals 22 and 31
• If DTC 13 or 23 is set: between terminals 8 and 9
• If DTC 14 or 24 is set: between terminals 6 and 7
Standard Value: 1.24 − 1.64 kΩ
Q: Is the resistance within the standard value?
YES : Go to Step 13.
CONNECTOR B-118
NO <The resistance between terminals 22 and 31 is not
(HARNESS SIDE)
within the standard value.> : Go to Step 5.
12 11 10 9 8 7 6 5 4 3 2 1 NO <The resistance between terminals 29 and 30 is not
34
22 21 20 19 18 17 16 15 14 13
33 32 31 30 29 28 27 26 25 24 23 within the standard value.> : Go to Step 7.
NO <The resistance between terminals 6 and 7 is not
within the standard value.> : Go to Step 9.
NO <The resistance between terminals 8 and 9 is not
within the standard value.> : Go to Step 11.
AC212153AB

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 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
35B-17

STEP 5. Check the following connectors.

CONNECTOR: B-118 • ABS-ECU connector B-118

B-118 (B)

HARNESS SIDE

12 11 10 9 8 7 6 5 4 3 2 1
22 21 20 19 18 17 16 15 14 13
34 33 32 31 30 29 28 27 26 25 24 23
AC211901AD

CONNECTOR: A-29 • Intermediate connector A-29

A-29 (B)
1 2 3 4
5 6 7 8

AC211262 AX

CONNECTOR: A-03 • Front ABS sensor (LH) connector A-03

Check the connectors, for loose, corroded or damaged termi-
nals, or terminals pushed back in the connector.
Q: Are the connectors and terminals in good condition?
A-03 (B) YES : Go to Step 6.
NO : Repair it and then go to Step 15.

HARNESS SIDE
2 1
AC211899AC

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35B-18 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

STEP 6. Check the following harness wires.

CONNECTOR: B-118 • The wire between ABS-ECU connector B-118 (terminal 22)
and front ABS sensor (LH) connector A-03 (terminal 2)
• The wire between ABS-ECU connector B-118 (terminal 31)
and front ABS sensor (LH) connector A-03 (terminal 1)
B-118 (B)
Q: Is any harness wire damaged?
YES : Repair or replace it and then go to Step 15.
HARNESS SIDE NO : Go to Step 15.
12 11 10 9 8 7 6 5 4 3 2 1
22 21 20 19 18 17 16 15 14 13
34 33 32 31 30 29 28 27 26 25 24 23
AC211901AD

CONNECTOR: A-03

A-03 (B)

HARNESS SIDE
2 1
AC211899AC

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 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
35B-19

STEP 7. Check the following connectors.

CONNECTOR: B-118 • ABS-ECU connector B-118

B-118 (B)

HARNESS SIDE

12 11 10 9 8 7 6 5 4 3 2 1
22 21 20 19 18 17 16 15 14 13
34 33 32 31 30 29 28 27 26 25 24 23
AC211901AD

CONNECTOR: C-111
• Intermediate connectors C-111, C-122

HARNESS SIDE
5 4 3 2 1
13121110 9 8 7 6

AC211266 BN

CONNECTOR: C-122

C-122 (L)
1 2 3 4 5 6 7 8 9 10 11
12 13 14 15 16 17 18 19 20 21 22 AC211265 DD

CONNECTOR: A-27 • Front ABS sensor (RH) connector A-27

Check the connectors, for loose, corroded or damaged termi-
nals, or terminals pushed back in the connector.
Q: Are the connectors and terminals in good condition?
A-27 (B) YES : Go to Step 8.
NO : Repair it and then go to Step 15.

HARNESS SIDE
2 1
AC211900AC

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35B-20 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

STEP 8. Check the following harness wires.

CONNECTOR: B-118 • The wire between ABS-ECU connector B-118 (terminal 29)
and front ABS sensor (RH) connector A-27 (terminal 1)
• The wire between ABS-ECU connector B-118 (terminal 30)
and front ABS sensor (RH) connector A-27 (terminal 2)
B-118 (B)
Q: Is any harness wire damaged?
YES : Repair or replace it and then go to Step 15.
HARNESS SIDE NO : Go to Step 15.
12 11 10 9 8 7 6 5 4 3 2 1
22 21 20 19 18 17 16 15 14 13
34 33 32 31 30 29 28 27 26 25 24 23
AC211901AD

CONNECTOR: A-03

A-03 (B)

HARNESS SIDE
2 1
AC211899AC

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 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
35B-21

STEP 9. Check the following connectors.

CONNECTOR: B-118 • ABS-ECU connector B-118

B-118 (B)

HARNESS SIDE

12 11 10 9 8 7 6 5 4 3 2 1
22 21 20 19 18 17 16 15 14 13
34 33 32 31 30 29 28 27 26 25 24 23
AC211901AD

• Intermediate connectors C-113, C-122, D-34

CONNECTOR: C-113
HARNESS SIDE • Rear ABS sensor (LH) connector D-13
13 12 11 10 9 8 7 6 5 4 3 2 1 Check the connectors, for loose, corroded or damaged termi-
2524 23 22 21 20 19 18 17 16 1514
nals, or terminals pushed back in the connector.
Q: Are the connectors and terminals in good condition?
YES : Go to Step 10.
NO : Repair it and then go to Step 15.

AC211266 BO

CONNECTOR: C-122

C-122 (L)
1 2 3 4 5 6 7 8 9 10 11
12 13 14 15 16 17 18 19 20 21 22 AC211265 DD

CONNECTORS: D-13, D-34

D-34

D-13 (B)

CONNECTOR D-13 CONNECTOR D-34

(HARNESS SIDE) 1 2 3
1 2 4 5 6 7 8
AC211902AD

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35B-22 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

STEP 10. Check the following harness wires.

CONNECTOR: B-118 • The wire between ABS-ECU connector B-118 (terminal 6)
and rear ABS sensor (LH) connector D-13 (terminal 1)
• The wire between ABS-ECU connector B-118 (terminal 7)
and rear ABS sensor (LH) connector D-13 (terminal 2)
B-118 (B)
Q: Is any harness wire damaged?
YES : Repair or replace it and then go to Step 15.
HARNESS SIDE NO : Go to Step 15.
12 11 10 9 8 7 6 5 4 3 2 1
22 21 20 19 18 17 16 15 14 13
34 33 32 31 30 29 28 27 26 25 24 23
AC211901AD

CONNECTOR: D-13

D-13 (B)

HARNESS SIDE
1 2

AC211902AE

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 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
35B-23

STEP 11. Check the following connectors.

CONNECTOR: B-118 • ABS-ECU connector B-118

B-118 (B)

HARNESS SIDE

12 11 10 9 8 7 6 5 4 3 2 1
22 21 20 19 18 17 16 15 14 13
34 33 32 31 30 29 28 27 26 25 24 23
AC211901AD

• Intermediate connectors C-113, C-122, D-34

CONNECTOR: C-113
HARNESS SIDE • Rear ABS sensor (RH) connector D-06
13 12 11 10 9 8 7 6 5 4 3 2 1 Check the connectors, for loose, corroded or damaged termi-
2524 23 22 21 20 19 18 17 16 1514
nals, or terminals pushed back in the connector.
Q: Are the connectors and terminals in good condition?
YES : Go to Step 12.
NO : Repair it and then go to Step 15.

AC211266 BO

CONNECTOR: C-122

C-122 (L)
1 2 3 4 5 6 7 8 9 10 11
12 13 14 15 16 17 18 19 20 21 22 AC211265 DD

CONNECTORS: D-06, D-34

D-06 (B)

D-34

CONNECTOR D-06 CONNECTOR D-34

(HARNESS SIDE) 1 2 3
1 2 4 5 6 7 8

AC211902AF

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35B-24 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

STEP 12. Check the following harness wires.

CONNECTOR: B-118 • The wire between ABS-ECU connector B-118 (terminal 8)
and rear ABS sensor (RH) connector D-06 (terminal 1)
• The wire between ABS-ECU connector B-118 (terminal 9)
and rear ABS sensor (RH) connector D-06 (terminal 2)
B-118 (B)
Q: Is any harness wire damaged?
YES : Repair or replace it and then go to Step 15.
HARNESS SIDE NO : Go to Step 15.
12 11 10 9 8 7 6 5 4 3 2 1
22 21 20 19 18 17 16 15 14 13
34 33 32 31 30 29 28 27 26 25 24 23
AC211901AD

CONNECTOR: D-06
D-06 (B)

HARNESS SIDE
1 2

AC211902AG

STEP 13. Measure the ABS sensor output voltage.

Refer to P.35B-112.
Output Voltage:
• When measured with a voltmeter: 42 mV or more
• When measured with an oscilloscope (maximum voltage):
120 mV or more
Q: Does the voltage meet the specification?
YES : Replace the brake modulator hydraulic unit
(integrated with ABS-ECU) (Refer to P.35B-118).
Then go to Step 15.
NO : Go to Step 14.

STEP 14. Check the wheel bearing.

Refer to GROUP 26, On-vehicle Service − Wheel Bearing End
Play Check <Front>P.26-6 or GROUP 27, On-vehicle Service −
Wheel Bearing End Play Check <Rear>P.27-12. If play on the
wheel bearing is not within the standard value, replace the
wheel bearing.
Limit Value: 0.05 mm (0.002 inch)
Q: Is play on the wheel bearing within the standard value?
YES : Go to Step 15.
NO : Replace it and then go to Step 15.

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 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
35B-25

STEP 15. Recheck for diagnostic trouble code.

Check again if the DTC is set.
(1) Turn the ignition switch to the "ON" position.
(2) Erase the DTC.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
16-PIN (4) Turn the ignition switch to the "ON" position.
(5) Check if the DTC is set.
(6) Turn the ignition switch to the "LOCK" (OFF) position.
MB991502 Q: Do the diagnostic trouble codes 11, 12, 13, 14, 21, 22, 23
or 24 reset?
AC207179AB YES : Go to Step 1.
NO : The procedure is complete.

16-PIN

MB991911

MB991824

MB991827 AC210056AC

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35B-26 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

DTC 16: ABS-ECU Power Supply System (abnormal voltage drop or rise)

Power Supply Circuit

IGNITION
SWITCH (IG2)

JUNCTION
BLOCK

ABS-ECU
POWER
SUPPLY

AC211705AB

CONNECTOR: B-118 CONNECTOR: C-124

B-118 (B)

C-124

AC211901AB AC211265 CV

CONNECTORS: C-210, C-211

C-211

C-210

AC211269 BJ

. .

CIRCUIT OPERATION ABS DTC SET CONDITIONS

The ABS-ECU power is supplied to the ABS-ECU Output is provided when ABS-ECU power supply
(terminal 10) from the ignition switch (IG2) through voltage drops below or rises above the normal value.
the multi-purpose fuse number 12 in the junction Output is not provided if power supply voltage
block. returns to normal voltage.

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 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
35B-27
• Damaged wiring harness and connector
.

TROUBLESHOOTING HINTS
The most likely causes for this DTC to set are: • Malfunction of brake modulator hydraulic unit and
• Malfunction of battery ABS-ECU

DIAGNOSIS
Required Special Tools:
• MB991223: Harness Set
• MB991529: Diagnostic Trouble Code Check Harness
• MB991502: Scan Tool (MUT-II)
• MB991958: Scan Tool (MUT-III Sub Assembly)
• MB991824: V.C.I.
• MB991827: USB Cable
• MB991910: Main Harness A

STEP 1. Check the battery.

Refer to GROUP 54A, Battery − On-vehicle Service − Battery
Test P.54A-4.
Q: Is the battery damaged?
YES : Charge or replace the battery and then go to Step 5.
NO : Go to Step 2.

STEP 2. Check the charging system.

Refer to GROUP 16, Charging System − Charging System
Diagnosis P.16-4.
Q: Is the charging system damaged?
YES : Repair the Charging System and then go to Step 5.
NO : Go to Step 3.

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35B-28 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

STEP 3. Check the following connectors.

CONNECTOR: B-118 • ABS-ECU connector B-118

B-118 (B)

HARNESS SIDE

12 11 10 9 8 7 6 5 4 3 2 1
22 21 20 19 18 17 16 15 14 13
34 33 32 31 30 29 28 27 26 25 24 23
AC211901AD

CONNECTOR : C-124 • Intermediate connector C-124

1 2 3 4 5 6 7 8 9 10 11 12 13
14 15 16 17 18 19 20 2122 23 24 25
AC211265 AR

CONNECTORS : C-210, C-211 • Junction block connectors C-210, C-211

Check the connectors, for loose, corroded or damaged termi-
nals, or terminals pushed back in the connector.
C-211
Q: Are the connectors and terminals in good condition?
YES : Go to Step 4.
NO : Repair it and then go to Step 5.
C-210

JUNCTION BLOCK
(FRONT VIEW)

CONNECTOR C-210
(HARNESS SIDE)
6 5 4 3 2 1
14 13 12 11 10 9 8 7

CONNECTOR C-211
(HARNESS SIDE)
2 1
6 5 4 3
AC212152 AC

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 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
35B-29

STEP 4. Check the following harness wire.

CONNECTOR: B-118 • The wire between ABS-ECU connector B-118 (terminal 10)
and junction block connector C-211 (terminal 2)
Q: Is the harness wire damaged?
B-118 (B) YES : Repair or replace it and then go to Step 5.
NO : Go to Step 5.

HARNESS SIDE

12 11 10 9 8 7 6 5 4 3 2 1
22 21 20 19 18 17 16 15 14 13
34 33 32 31 30 29 28 27 26 25 24 23
AC211901AD

CONNECTOR: C-211

HARNESS SIDE
2 1
6 5 4 3
JUNCTION BLOCK
(FRONT VIEW) AC211269 AL

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35B-30 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

STEP 5. Recheck for diagnostic trouble code.

Check again if the DTC is set.
(1) Turn the ignition switch to the "ON" position.
(2) Erase the DTC.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
16-PIN (4) Turn the ignition switch to the "ON" position.
(5) Check if the DTC is set.
(6) Turn the ignition switch to the "LOCK" (OFF) position.
MB991502 Q: Does DTC 16 reset?
YES : Start over at Step 1.
AC207179AB NO : The procedure is complete.

16-PIN

MB991911

MB991824

MB991827 AC210056AC

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 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
35B-31

DTC 32: Longitudinal G-Sensor System

Longitudinal G-Sensor Circuit

IGNITION
SWITCH (IG2)

JUNCTION
BLOCK

G-SENSOR
(LONGITUDINAL)

ABS-ECU

AC211706AB

CONNECTOR: B-118 CONNECTORS: C-122, C-124

B-118 (B)

C-124

C-122 (L)
AC211901AB AC211265 CW

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35B-32 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

CONNECTORS: C-211, C-214 CONNECTOR: D-38

C-211

C-214
D-38 (B)

AC211269 BK AC208854AD

• If the G-sensor output power does not change

.

CIRCUIT OPERATION
The G-sensor detects the acceleration level in the (G-sensor output fastening).
forward/reverse direction of the vehicle, converts the .

signals into voltage signals and then sends that sig- TROUBLESHOOTING HINTS
nal to the ABS-ECU. The most likely causes for this DTC to set are:
• Malfunction of the G-sensor
• Damaged wiring harness and connector
.

ABS DTC SET CONDITIONS

This code is output in the following case. • Malfunction of the brake modulator hydraulic unit
• When the G-sensor output is 0.5 V or lower or (integrated with ABS-ECU)
4.5 V or higher (disconnected G-sensor or G-sen-
sor short circuit)
.

DIAGNOSIS
Required Special Tools:
• MB991223: Harness Set
• MB991529: Diagnostic Trouble Code Check Harness
• MB991502: Scan Tool (MUT-II)
• MB991958: Scan Tool (MUT-III Sub Assembly)
• MB991824: V.C.I.
• MB991827: USB Cable
• MB991910: Main Harness A

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 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
35B-33

STEP 1. Using scan tool MB991502 or MB991958, check

data list item 32: Longitudinal G-sensor.
CAUTION
To prevent damage to scan tool MB991502 or MB991958,
always turn the ignition switch to the "LOOK" (OFF) posi-
tion before connecting or disconnecting scan tool
MB991502 or MB991958.
(1) Connect scan tool MB991502 or MB991958 as shown in
the illustration.
(2) Start the engine.
(3) Set scan tool MB991502 or MB991958 to data reading
16-PIN mode for following item.
• Item 32: Longitudinal G-sensor
(4) Confirm the indicated value. The voltage should measure
the followings:
MB991502
• When vehicle is stationary (level): 2.4 − 2.6 V
AC207179AB
• When vehicle is being driven: 1.0 − 4.0 V
Q: Is the longitudinal G-sensor input normal?
YES : This malfunction is intermittent. Refer to GROUP 00,
How to Use Troubleshooting/Inspection Service
Points − How to Cope With Intermittent Malfunction
16-PIN
P.00E-2.
NO : Go to Step 2.

MB991911

MB991824

MB991827 AC210056AC

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35B-34 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

STEP 2. Check the power supply circuit. Measure the

voltage at longitudinal G-sensor connector D-38.
CONNECTOR: D-38 (1) Disconnect connector D-38, and check at the harness side.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal 1 and ground. It
should measure approximately 12 volts (battery positive
voltage).
Q: Is battery positive voltage (approximately 12 volts)
D-38 (B) present?
YES : Go to Step 3.
NO : Go to Step 4.

CONNECTOR D-38
(HARNESS SIDE)

3 2 1

AC212253AB

STEP 3. Check the ground circuit. Measure the resistance

at longitudinal G-sensor connector D-38.
CONNECTOR: D-38 (1) Disconnect connector D-38, and check at the harness side.
(2) Measure the resistance between terminal 3 and ground. It
should measure less than 2 ohms.
Q: Is the resistance 2 ohms or less?
YES : Go to Step 8.
NO : Go to Step 6.
D-38 (B)

CONNECTOR D-38
(HARNESS SIDE)
AD

3 2 1

AC212253AC

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 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
35B-35

STEP 4. Check the following connectors.

CONNECTOR: D-38 • Longitudinal G-sensor connector D-38

D-38 (B)
HARNESS SIDE

3 2 1
AC208854AE

CONNECTORS: C-211, C-214

• Junction block connectors C-211, C-214
Check the connectors, for loose, corroded or damaged termi-
C-211
nals, or terminals pushed back in the connector.
Q: Are the connectors and terminals in good condition?
YES : Go to Step 5.
NO : Repair it and then go to Step 11.
C-214

JUNCTION BLOCK CONNECTOR C-211

(FRONT VIEW) (HARNESS SIDE)
2 1
6 5 4 3

CONNECTOR C-214
(HARNESS SIDE)

14 13 12 11 10 9 8 7 6 5 4 3 2 1

28 27 26 25 24 23 22 21 20 19 18 17 16 15

AC212152AD

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35B-36 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

STEP 5. Check the following harness wire.

CONNECTOR: D-38 • The wire between longitudinal G-sensor connector D-38
(terminal 1) and junction block connector C-211 (terminal 2)
Q: Is the harness wire damaged?
YES : Repair or replace it and then go to Step 11.
NO : Go to Step 11.

D-38 (B)
HARNESS SIDE

3 2 1
AC208854AE

CONNECTOR: C-211

HARNESS SIDE
2 1
6 5 4 3
JUNCTION BLOCK
(FRONT VIEW) AC211269 AL

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 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
35B-37

STEP 6. Check the following connectors.

CONNECTOR: D-38 • Longitudinal G-sensor connector D-38

D-38 (B)
HARNESS SIDE

3 2 1
AC208854AE

CONNECTOR : C-124 • Intermediate connector C-124

1 2 3 4 5 6 7 8 9 10 11 12 13
14 15 16 17 18 19 20 2122 23 24 25
AC211265 AR

CONNECTOR: B-118 • ABS-ECU connector B-118

Check the connectors, for loose, corroded or damaged termi-
nals, or terminals pushed back in the connector.
B-118 (B) Q: Are the connectors and terminals in good condition?
YES : Go to Step 7.
NO : Repair it and then go to Step 11.
HARNESS SIDE

12 11 10 9 8 7 6 5 4 3 2 1
22 21 20 19 18 17 16 15 14 13
34 33 32 31 30 29 28 27 26 25 24 23
AC211901AD

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35B-38 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

STEP 7. Check the following harness wire.

CONNECTOR: D-38 • The wire between longitudinal G-sensor connector D-38
(terminal 3) and ABS-ECU connector B-118 (terminal 15)
Q: Is the harness wire damaged?
YES : Repair or replace it and then go to Step 11.
NO : Go to Step 11.

D-38 (B)
HARNESS SIDE

3 2 1
AC208854AE

CONNECTOR: B-118

B-118 (B)

HARNESS SIDE

12 11 10 9 8 7 6 5 4 3 2 1
22 21 20 19 18 17 16 15 14 13
34 33 32 31 30 29 28 27 26 25 24 23
AC211901AD

STEP 8. Check longitudinal G-sensor output voltage.

(1) Disconnect connector D-38, and then connect special tool
MB991348 between terminals of the disconnected
LABEL connectors.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal 2 and ground.
MB991348 • It should measure 2.4 − 2.6 volts when the longitudinal
G-sensor is placed on a level plane.
• Voltage should measure 3.4 − 3.6 volts when the longi-
tudinal G-sensor is placed with its label face as shown.
Q: Is the longitudinal G-sensor output voltage normal?
CONNECTOR: D-37/D-38
(HARNESS SIDE) YES : Go to Step 9.
NO : Replace the longitudinal G-sensor (Refer to P.35B-
122). Then go to Step 11.
LABEL

AC103662AG

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 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
35B-39

STEP 9. Check the following connectors.

CONNECTOR: D-38 • Longitudinal G-sensor connector D-38

D-38 (B)
HARNESS SIDE

3 2 1
AC208854AE

CONNECTOR: C-122 • Intermediate connector C-122

C-122 (L)
1 2 3 4 5 6 7 8 9 10 11
12 13 14 15 16 17 18 19 20 21 22 AC211265 DD

CONNECTOR: B-118 • ABS-ECU connector B-118

Check the connectors, for loose, corroded or damaged termi-
nals, or terminals pushed back in the connector.
B-118 (B) Q: Are the connectors and terminals in good condition?
YES : Go to Step 10.
NO : Repair it and then go to Step 11.
HARNESS SIDE

12 11 10 9 8 7 6 5 4 3 2 1
22 21 20 19 18 17 16 15 14 13
34 33 32 31 30 29 28 27 26 25 24 23
AC211901AD

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35B-40 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

STEP 10. Check the following harness wire.

CONNECTOR: D-38 • The wire between longitudinal G-sensor connector D-38
(terminal 2) and ABS-ECU connector B-118 (terminal 25)
Q: Is the harness wire damaged?
YES : Repair or replace it and then go to Step 11.
NO : Replace the brake modulator hydraulic unit
(integrated with ABS-ECU) (Refer to P.35B-118).
D-38 (B) Then go to Step 11.
HARNESS SIDE

3 2 1
AC208854AE

CONNECTOR: B-118

B-118 (B)

HARNESS SIDE

12 11 10 9 8 7 6 5 4 3 2 1
22 21 20 19 18 17 16 15 14 13
34 33 32 31 30 29 28 27 26 25 24 23
AC211901AD

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 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
35B-41

STEP 11. Recheck for diagnostic trouble code.

Check again if the DTC is set.
(1) Turn the ignition switch to the "ON" position.
(2) Erase the DTC.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
16-PIN (4) Turn the ignition switch to the "ON" position.
(5) Check if the DTC is set.
(6) Turn the ignition switch to the "LOCK" (OFF) position.
MB991502 Q: Does DTC 32 reset?
YES : Start over at Step 1.
AC207179AB NO : The procedure is complete.

16-PIN

MB991911

MB991824

MB991827 AC210056AC

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35B-42 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

DTC 41, 42, 43, and 44: Solenoid Valve inside Hydraulic Unit
DTC 52: Valve Relay Problem (Stays off)
DTC 53: Motor Relay Problem (Stays off)
DTC 55: Motor System (Seized Pump Motor)

Solenoid Valve and Motor Power Supply Circuit

FUSIBLE
LINK 3

HYDRAULIC UNIT
MOTOR SOLENOID VALVE

SOLENOID MOTOR
VALVE POWER POWER
SUPPLY SUPPLY

ABS-ECU

AC211707AB

CONNECTOR: A-12 CONNECTOR: B-118

A-12 (B)
B-118 (B)

AC211262 AV AC211901AB

FUSIBLE LINK: NO.3

NO.3

AC208825 AL

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 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
35B-43
CIRCUIT OPERATION
.

TROUBLESHOOTING HINTS
Power is continuously supplied to the ABS-ECU The most likely causes for these DTCs to set are:
through fusible link number 3 to operate the solenoid • Damaged wiring harness or connector
valve and motor. • Malfunction of the brake modulator hydraulic unit
.
(integrated with ABS-ECU)
ABS DTC SET CONDITIONS
These codes are displayed if the power supply circuit
of solenoid valve or motor is open or shorted.
.

DIAGNOSIS
Required Special Tools:
• MB991223: Harness Set
• MB991529: Diagnostic Trouble Code Check Harness
• MB991502: Scan Tool (MUT-II)
• MB991958: Scan Tool (MUT-III Sub Assembly)
• MB991824: V.C.I.
• MB991827: USB Cable
• MB991910: Main Harness A

STEP 1. Check the solenoid valve or motor power supply

circuit. Measure the voltage at ABS-ECU connector B-118.
CONNECTOR: B-118 (1) Disconnect ABS-ECU connector B-118 and measure at the
harness side.
(2) Measure the voltage between terminal 11 and ground, and
33 and ground. It should measure approximately 12 volts
B-118 (B) (battery positive voltage).
Q: Is battery positive voltage (approximately 12 volts)
present?
YES : Replace the brake modulator hydraulic unit
(integrated with ABS-ECU) (Refer to P.35B-118).
Then go to Step 4.
NO : Go to Step 2.
CONNECTOR B-118
(HARNESS SIDE)

12 11 10 9 8 7 6 5 4 3 2 1
22 21 20 19 18 17 16 15 14 13
34 33 32 31 30 29 28 27 26 25 24 23

AC212153AD

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35B-44 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

STEP 2. Check the following connectors.

CONNECTOR: B-118 • ABS-ECU connector B-118

B-118 (B)

HARNESS SIDE

12 11 10 9 8 7 6 5 4 3 2 1
22 21 20 19 18 17 16 15 14 13
34 33 32 31 30 29 28 27 26 25 24 23
AC211901AD

CONNECTOR: A-12
• Intermediate connector A-12
Check the connectors, for loose, corroded or damaged termi-
A-12 (B) nals, or terminals pushed back in the connector.
Q: Are the connectors and terminals in good condition?
YES : Go to Step 3.
NO : Repair it and then go to Step 4.
1 2

AC211262AY

STEP 3. Check the following harness wires.

FUSIBLE LINK: NO.3 • The wire between fusible link No.3 and ABS-ECU connec-
tor B-118 (terminal 11)
• The wire between fusible link No.3 and ABS-ECU connec-
tor B-118 (terminal 33)
Q: Is any harness wire damaged?
NO.3
YES : Repair or replace it and then go to Step 4.
NO : Go to Step 4.

AC208825 AL

CONNECTOR: B-118

B-118 (B)

HARNESS SIDE

12 11 10 9 8 7 6 5 4 3 2 1
22 21 20 19 18 17 16 15 14 13
34 33 32 31 30 29 28 27 26 25 24 23
AC211901AD

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 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
35B-45

STEP 4. Recheck for diagnostic trouble code.

Check again if the DTC is set.
(1) Turn the ignition switch to the "ON" position.
(2) Erase the DTC.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
16-PIN (4) Turn the ignition switch to the "ON" position.
(5) Check if the DTC is set.
(6) Turn the ignition switch to the "LOCK" (OFF) position.
MB991502 Q: Do diagnostic trouble codes 41, 42, 43, 44, 52, 53 or 55
reset?
AC207179AB YES : Return to Step 1.
NO : The procedure is complete.

16-PIN

MB991911

MB991824

MB991827 AC210056AC

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35B-46 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

DTC 71: Lateral G-Sensor System

Lateral G-Sensor Circuit

IGNITION
SWITCH (IG2)

JUNCTION
BLOCK

G-SENSOR
(LATERAL)

ABS-ECU

AC211708AB

CONNECTOR: B-118 CONNECTOR: C-122

B-118 (B)

C-122 (L)

AC211901AB AC211265 CU

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 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
35B-47

CONNECTORS: C-211, C-214 CONNECTOR: D-37

C-211

C-214 D-37 (B)

AC211269 BK AC208854AC

• If the lateral G-sensor output power does not

.

CIRCUIT OPERATION
The lateral G-sensor detects the acceleration level in change (lateral G-sensor output fastening).
the left/right direction of the vehicle, converts the sig- .

nals into voltage signals and then sends that signal TROUBLESHOOTING HINTS
to the ABS-ECU. The most likely causes for DTC to set are:
• Malfunction of the lateral G-sensor
• Damaged wiring harness and connector
.

ABS DTC SET CONDITIONS

This code is output in the following case. • Malfunction of the brake modulator hydraulic unit
• When the G-sensor output is 0.5 V or lower or (integrated with ABS-ECU)
4.5 V or higher (disconnected lateral G-sensor or
lateral G-sensor short circuit)
.

DIAGNOSIS
Required Special Tools:
• MB991223: Harness Set
• MB991529: Diagnostic Trouble Code Check Harness
• MB991502: Scan Tool (MUT-II)
• MB991958: Scan Tool (MUT-III Sub Assembly)
• MB991824: V.C.I.
• MB991827: USB Cable
• MB991910: Main Harness A

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35B-48 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

STEP 1. Using scan tool MB991502 or MB991958, check

data list item 71: Lateral G-sensor.
CAUTION
To prevent damage to scan tool MB991502 or MB991958,
always turn the ignition switch to the "LOOK" (OFF) posi-
tion before connecting or disconnecting scan tool
MB991502 or MB991958.
(1) Connect scan tool MB991502 or MB991958 as shown in
the illustration.
(2) Start the engine.
(3) Set scan tool MB991502 or MB991958 to data reading
16-PIN mode for following item.
• Item 71: Lateral G-sensor
(4) Confirm the indicated value. The voltage should measure
the followings:
MB991502
• When vehicle is stationary (level): 2.4 − 2.6 V
AC207179AB
• When vehicle is being driven: 1.0 − 4.0 V
Q: Is the lateral G-sensor input normal?
YES : This malfunction is intermittent. Refer to GROUP 00,
How to Use Troubleshooting/Inspection Service
Points − How to Cope With Intermittent Malfunction
16-PIN
P.00E-2.
NO : Go to Step 2.

MB991911

MB991824

MB991827 AC210056AC

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 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
35B-49

STEP 2. Check the power supply circuit. Measure the

voltage at lateral G-sensor connector D-37.
CONNECTOR: D-37 (1) Disconnect connector D-37, and check at the harness side.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal 1 and ground. It
should measure approximately 12 volts (battery positive
voltage).
D-37 (B) Q: Is battery positive voltage (approximately 12 volts)
present?
YES : Go to Step 3.
NO : Go to Step 4.

CONNECTOR D-37
(HARNESS SIDE)

3 2 1

AC212253AD

STEP 3. Check the ground circuit. Measure the resistance

at lateral G-sensor connector D-37.
CONNECTOR: D-37 (1) Disconnect connector D-37, and check at the harness side.
(2) Measure the resistance between terminal 3 and ground. It
should measure less than 2 ohms.
Q: Is the resistance 2 ohms or less?
YES : Go to Step 8.
D-37 (B)
NO : Go to Step 6.

CONNECTOR D-37
(HARNESS SIDE)
AD

3 2 1

AC212253AE

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35B-50 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

STEP 4. Check the following connectors.

CONNECTOR: D-37 • Lateral G-sensor connector D-37

D-37 (B)

HARNESS SIDE

3 2 1
AC208854AF

CONNECTORS: C-211, C-214

• Junction block connectors C-211, C-214
Check the connectors, for loose, corroded or damaged termi-
C-211
nals, or terminals pushed back in the connector.
Q: Are the connectors and terminals in good condition?
YES : Go to Step 5.
NO : Repair it and then go to Step 11.
C-214

JUNCTION BLOCK CONNECTOR C-211

(FRONT VIEW) (HARNESS SIDE)
2 1
6 5 4 3

CONNECTOR C-214
(HARNESS SIDE)

14 13 12 11 10 9 8 7 6 5 4 3 2 1

28 27 26 25 24 23 22 21 20 19 18 17 16 15

AC212152AD

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 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
35B-51

STEP 5. Check the following harness wire.

CONNECTOR: D-37 • The wire between lateral G-sensor connector D-37 (termi-
nal 1) and junction block connector C-211 (terminal 2)
Q: Is the harness wire damaged?
YES : Repair or replace it and then go to Step 11.
NO : Go to Step 11.
D-37 (B)

HARNESS SIDE

3 2 1
AC208854AF

CONNECTOR: C-211

HARNESS SIDE
2 1
6 5 4 3
JUNCTION BLOCK
(FRONT VIEW) AC211269 AL

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35B-52 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

STEP 6. Check the following connectors.

CONNECTOR: D-37 • Lateral G-sensor connector D-37

D-37 (B)

HARNESS SIDE

3 2 1
AC208854AF

CONNECTOR: C-122 • Intermediate connector C-122

C-122 (L)
1 2 3 4 5 6 7 8 9 10 11
12 13 14 15 16 17 18 19 20 21 22 AC211265 DD

CONNECTOR: B-118 • ABS-ECU connector B-118

Check the connectors, for loose, corroded or damaged termi-
nals, or terminals pushed back in the connector.
B-118 (B) Q: Are the connectors and terminals in good condition?
YES : Go to Step 7.
NO : Repair it and then go to Step 11.
HARNESS SIDE

12 11 10 9 8 7 6 5 4 3 2 1
22 21 20 19 18 17 16 15 14 13
34 33 32 31 30 29 28 27 26 25 24 23
AC211901AD

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 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
35B-53

STEP 7. Check the following harness wire.

CONNECTOR: D-37 • The wire between lateral G-sensor connector D-37 (termi-
nal 3) and ABS-ECU connector B-118 (terminal 24)
Q: Is the harness wire damaged?
YES : Repair or replace it and then go to Step 11.
NO : Go to Step 11.
D-37 (B)

HARNESS SIDE

3 2 1
AC208854AF

CONNECTOR: B-118

B-118 (B)

HARNESS SIDE

12 11 10 9 8 7 6 5 4 3 2 1
22 21 20 19 18 17 16 15 14 13
34 33 32 31 30 29 28 27 26 25 24 23
AC211901AD

STEP 8. Check lateral G-sensor output voltage.

(1) Disconnect connector D-37, and then connect special tool
MB991348 between terminals of the disconnected
LABEL connectors.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal 2 and ground.
MB991348 • It should measure 2.4 − 2.6 volts when the lateral G-
sensor is placed on a level plane.
• Voltage should measure 3.4 − 3.6 volts when the lateral
G-sensor is placed with its label face as shown.
Q: Is the lateral G-sensor output voltage normal?
CONNECTOR: D-37/D-38
(HARNESS SIDE) YES : Go to Step 9.
NO : Replace the lateral G-sensor (Refer to P.35B-122).
Then go to Step 11.
LABEL

AC103662AG

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35B-54 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

STEP 9. Check the following connectors.

CONNECTOR: D-37 • Lateral G-sensor connector D-37

D-37 (B)

HARNESS SIDE

3 2 1
AC208854AF

CONNECTOR: C-122 • Intermediate connector C-122

C-122 (L)
1 2 3 4 5 6 7 8 9 10 11
12 13 14 15 16 17 18 19 20 21 22 AC211265 DD

CONNECTOR: B-118 • ABS-ECU connector B-118

Check the connectors, for loose, corroded or damaged termi-
nals, or terminals pushed back in the connector.
B-118 (B) Q: Are the connectors and terminals in good condition?
YES : Go to Step 10.
NO : Repair it and then go to Step 11.
HARNESS SIDE

12 11 10 9 8 7 6 5 4 3 2 1
22 21 20 19 18 17 16 15 14 13
34 33 32 31 30 29 28 27 26 25 24 23
AC211901AD

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 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
35B-55

STEP 10. Check the following harness wire.

CONNECTOR: D-38 • The wire between lateral G-sensor connector D-37 (termi-
nal 2) and ABS-ECU connector B-118 (terminal 14)
Q: Is the harness wire damaged?
YES : Repair or replace it and then go to Step 11.
NO : Replace the brake modulator hydraulic unit
(integrated with ABS-ECU) (Refer to P.35B-118).
D-38 (B) Then go to Step 11.
HARNESS SIDE

3 2 1
AC208854AE

CONNECTOR: B-118

B-118 (B)

HARNESS SIDE

12 11 10 9 8 7 6 5 4 3 2 1
22 21 20 19 18 17 16 15 14 13
34 33 32 31 30 29 28 27 26 25 24 23
AC211901AD

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35B-56 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

STEP 11. Recheck for diagnostic trouble code.

Check again if the DTC is set.
(1) Turn the ignition switch to the "ON" position.
(2) Erase the DTC.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
16-PIN (4) Turn the ignition switch to the "ON" position.
(5) Check if the DTC is set.
(6) Turn the ignition switch to the "LOCK" (OFF) position.
MB991502 Q: Does DTC 71 reset?
YES : Start over at Step 1.
AC207179AB NO : The procedure is complete.

16-PIN

MB991911

MB991824

MB991827 AC210056AC

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 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
35B-57

DTC 81/82/83: Steering Angular Velocity Sensor System

Steering Angular Velocity Sensor Circuit

IGNITION
SWITCH (IG2)
ABS-ECU

JUNCTION
BLOCK

JOINT
CONNECTOR (2)

STEERING
ANGULAR
VELOCITY
SENSOR

ST-1 ST-2 ST-N

JOINT
CONNECTOR (3)

AC211709AB

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35B-58 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

CONNECTOR: B-118 CONNECTOR: C-06

C-06 (GR)

B-118 (B)

AC211901AB AC211266BM

CONNECTORS: C-101, C-122 CONNECTORS: C-210, C-211

C-211
C-101 (L)

C-210

C-122 (L)

AC211265CX AC211269 BJ

CONNECTOR: C-230

C-230

AC211267 AJ

. .

CIRCUIT OPERATION TROUBLESHOOTING HINTS

The steering angular velocity sensor monitors the The most likely causes for these DTCs to set are:
steering angle and outputs the ST-1, ST-2 and ST-N • Malfunction of the steering angular velocity sen-
signals. The ABS-ECU calculates the steering angle sor
by reading the signals from the steering angular • Damaged wiring harness and connector
velocity sensor. • Malfunction of the brake modulator hydraulic unit
.
(integrated with ABS-ECU)
ABS DTC SET CONDITIONS
DTC 81 (ST-1), DTC 82 (ST-2) and DTC 83 (ST-N)
are output if there is a fault in the steering angular
velocity sensor, an open circuit or short circuit in the
signal lines, or the internal circuit in the hydraulic unit
and ABS-ECU is defective.
.

DIAGNOSIS
Required Special Tools:
• MB991223: Harness Set
• MB991529: Diagnostic Trouble Code Check Harness
• MB991502: Scan Tool (MUT-II)

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 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
35B-59
• MB991958: Scan Tool (MUT-III Sub Assembly)
• MB991824: V.C.I.
• MB991827: USB Cable
• MB991910: Main Harness A

STEP 1. Using scan tool MB991502 or MB991958, check

data list item 74, 75, 76: steering angular velocity sensor.
CAUTION
To prevent damage to scan tool MB991502 or MB991958,
always turn the ignition switch to the "LOOK" (OFF) posi-
tion before connecting or disconnecting scan tool
MB991502 or MB991958.
(1) Connect scan tool MB991502 or MB991958 as shown in
the illustration.
(2) Start the engine.
(3) Set scan tool MB991502 or MB991958 to data reading
16-PIN mode for following items.
• Item 74: Steering angular velocity (ST−N)
• Item 75: Steering angular velocity (ST−1)
• Item 76: Steering angular velocity (ST−2)
MB991502
(4) Confirm the indicated ON/OFF state as follows:
AC207179AB ITEM CHECK ITEM CHECKING DISPLAY
NO. REQUIREMENT
74 Steering Steering: Neutral ON
angular velocity position and
sensor (ST-N) position near by ±
16-PIN 360°
Steering: Except for OFF
above
75 Steering Steering: Turn Display ON
angular velocity laterally slowly. and OFF
MB991911
sensor (ST-1) alternately
76 Steering
MB991824 angular velocity
sensor (ST-2)

Q: Is the steering angular velocity sensor input normal?

YES : This malfunction is intermittent. Refer to GROUP 00,
How to Use Troubleshooting/Inspection Service
Points − How to Cope With Intermittent Malfunction
MB991827 AC210056AC P.00E-2.
NO : Go to Step 2.

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35B-60 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

STEP 2. Check the power supply circuit. Measure the

voltage at steering angular velocity sensor connector C-
230.
CONNECTOR: C-230 (1) Disconnect connector C-230, and check at the harness
side.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal 2 and ground. It
should measure approximately 12 volts (battery positive
voltage).
Q: Is battery positive voltage (approximately 12 volts)
present?
YES : Go to Step 3.
NO : Go to Step 4.

CONNECTOR C-230
(HARNESS SIDE)
1
5 4 3 2

AC212249AB

STEP 3. Check the ground circuit. Measure the resistance

at steering angular velocity sensor connector C-230.
CONNECTOR: C-230 (1) Disconnect connector C-230, and check at the harness
side.
(2) Measure the resistance between terminal 3 and ground. It
should measure less than 2 ohms.
Q: Is the resistance 2 ohms or less?
YES : Go to Step 8.
NO : Go to Step 6.

CONNECTOR C-230
(HARNESS SIDE)
1
5 4 3 2

AC212249AC

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 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
35B-61

STEP 4. Check the following connectors.

CONNECTOR: C-230 • Steering angular velocity sensor connector C-230

HARNESS
SIDE
1
5 4 3 2
AC211267AL

CONNECTORS : C-210, C-211 • Junction block connectors C-210, C-211

C-211

C-210

JUNCTION BLOCK
(FRONT VIEW)

CONNECTOR C-210
(HARNESS SIDE)
6 5 4 3 2 1
14 13 12 11 10 9 8 7

CONNECTOR C-211
(HARNESS SIDE)
2 1
6 5 4 3
AC212152 AC

CONNECTOR: C-101
• Joint connector C-101
Check the connectors, for loose, corroded or damaged termi-
C-101 (L)
nals, or terminals pushed back in the connector.
Q: Are the connectors and terminals in good condition?
YES : Go to Step 5.
NO : Repair it and then go to Step 11.

1 2 3 4 5 6 7 8 9 10 11
12 13 14 15 16 17 18 19 20 21 22 AC211265DE

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35B-62 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

STEP 5. Check the following harness wire.

CONNECTOR: C-230 • The wire between steering angular velocity sensor connec-
tor C-230 (terminal 2) and junction block connector C-211
(terminal 2)
Q: Is the harness wire damaged?
YES : Repair or replace it and then go to Step 11.
NO : Go to Step 11.
HARNESS
SIDE
1
5 4 3 2
AC211267AL

CONNECTOR: C-211

HARNESS SIDE
2 1
6 5 4 3
JUNCTION BLOCK
(FRONT VIEW) AC211269 AL

STEP 6. Check the following connectors.

CONNECTOR: C-230 • Steering angular velocity sensor connector C-230

HARNESS
SIDE
1
5 4 3 2
AC211267AL

CONNECTOR: C-06 • Joint connector C-06

1 2 3 4 5 6 7 8 9 10 11 Check the connectors, for loose, corroded or damaged termi-
C-06 (GR)
12 13 14 15 16 17 18 19 20 21 22 nals, or terminals pushed back in the connector.
Q: Are the connectors and terminals in good condition?
YES : Go to Step 7.
NO : Repair it and then go to Step 11.

AC211266BP

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 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
35B-63

STEP 7. Check the following harness wires.

CONNECTOR: C-230 • The wire between steering angular velocity sensor connec-
tor C-230 (terminal 3) and ground (No.3, No.14)
Q: Is any harness wire damaged?
YES : Repair or replace it and then go to Step 11.
NO : Go to Step 11.
HARNESS
SIDE
1
5 4 3 2
AC211267AL

GROUND

NO.3

AC211896 AB

GROUND

NO.14

AC211898AB

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35B-64 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

STEP 8. Check steering angular velocity sensor output

voltage.
CONNECTOR: C-230 (1) Connect steering angular velocity sensor connector C-230.
(2) Turn the ignition switch to the "ON" position.

CONNECTOR C-230
(HARNESS SIDE)
1
5 4 3 2

AC212249AD

VARIATIONS IN VOLTAGE WHEN TURNING (3) Measure the voltage, by backprobing, between terminal 1
THE STEERING WHEEL LATERALLY and ground, terminal 4 and ground, and terminal 5 and
VOLTAGE ground. The voltage should measure as indicated in the
figure.
2.7 - 4.4 V Q: Is the steering angular velocity sensor output voltage
normal?
0.8 - 2.1 V YES : Go to Step 9.
NO : Replace the steering angular velocity sensor (Refer to
TIME P.35B-124). Then go to Step 11.
AC211894 AB

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 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
35B-65

STEP 9. Check the following connectors.

CONNECTOR: C-230 • Steering angular velocity sensor connector C-230

HARNESS
SIDE
1
5 4 3 2
AC211267AL

CONNECTOR: C-122 • Intermediate connector C-122

C-122 (L)
1 2 3 4 5 6 7 8 9 10 11
12 13 14 15 16 17 18 19 20 21 22 AC211265 DD

CONNECTOR: B-118 • ABS-ECU connector B-118

Check the connectors, for loose, corroded or damaged termi-
nals, or terminals pushed back in the connector.
B-118 (B) Q: Are the connectors and terminals in good condition?
YES : Go to Step 10.
NO : Repair it and then go to Step 11.
HARNESS SIDE

12 11 10 9 8 7 6 5 4 3 2 1
22 21 20 19 18 17 16 15 14 13
34 33 32 31 30 29 28 27 26 25 24 23
AC211901AD

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35B-66 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

STEP 10. Check the following harness wires.

CONNECTOR: C-230 • If DTC 81 (ST-1) is set: The wire between steering angular
velocity sensor connector C-230 (terminal 5) and ABS-ECU
connector B-118 (terminal 26)
• If DTC 82 (ST-2) is set: The wire between steering angular
velocity sensor connector C-230 (terminal 4) and ABS-ECU
connector B-118 (terminal 17)
HARNESS • If DTC 83 (ST-N) is set: The wire between steering angular
SIDE velocity sensor connector C-230 (terminal 1) and ABS-ECU
1 connector B-118 (terminal 4)
5 4 3 2
AC211267AL Q: Is any harness wire damaged?
YES : Repair or replace it and then go to Step 11.
CONNECTOR: B-118
NO : Replace the brake modulator hydraulic unit
(integrated with ABS-ECU) (Refer to P.35B-118).
Then go to Step 11.
B-118 (B)

HARNESS SIDE

12 11 10 9 8 7 6 5 4 3 2 1
22 21 20 19 18 17 16 15 14 13
34 33 32 31 30 29 28 27 26 25 24 23
AC211901AD

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 ANTI-LOCK BRAKING SYSTEM (ABS)
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35B-67

STEP 11. Recheck for diagnostic trouble code.

Check again if the DTC is set.
(1) Turn the ignition switch to the "ON" position.
(2) Erase the DTC.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
16-PIN (4) Turn the ignition switch to the "ON" position.
(5) Check if the DTC is set.
(6) Turn the ignition switch to the "LOCK" (OFF) position.
MB991502 Q: Does DTC 81, 82 and/or 83 reset?
YES : Return to Step 1.
AC207179AB NO : The procedure is complete.

16-PIN

MB991911

MB991824

MB991827 AC210056AC

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35B-68 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

SYMPTOM CHART
M1352011400534
NOTE: If steering movements are made when driv- NOTE: During ABS operation, the brake pedal may
ing at high speed, or when driving on road surfaces vibrate a little or may not be able to be pressed. Such
with low frictional resistance, or when passing over conditions are due to intermittent changes in hydrau-
bumps, the ABS may operate although sudden brak- lic pressure inside the brake line to prevent the
ing is not being applied. Because of this, when get- wheels from locking. This is normal.
ting information from the customer, check if the
problem occurred while driving under such condi-
tions as these.
SYMPTOM INSPECTION REFERENCE PAGE
PROCEDURE NO.
Communication between the scan tool and the whole 1 P.35B-69
system is not possible.
Communication between the scan tool and the ABS- 2 P.35B-74
ECU is not possible.
When the ignition key is turned to the "ON" position 3 P.35B-82
(Engine stopped), the ABS warning light does not
illuminate.
The ABS warning light remains illuminated after the 4 P.35B-89
engine is started.
In the inspection with scan tool service data, the 5 P.35B-92
parking brake switch is not turn ON or turn OFF.
The neutral position learning of the steering angular 6 P.35B-98
velocity sensor is not finished.
Faulty ABS operation 7 P.35B-106

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 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
35B-69
SYMPTOM PROCEDURES

INSPECTION PROCEDURE 1: Communication between the Scan Tool and the Whole System is not
possible.

Data Link Connector Power Supply and Ground Circuit

FUSIBLE
LINK 1

JUNCTION
BLOCK

DATA LINK
CONNECTOR
FRONT SIDE

AC211710AB

CONNECTORS: C-14, C-126 CONNECTORS: C-212, C-214

C-212 (B)

C-214
C-126
C-14 (B)
AC211265 CY AC211269 BL

FUSIBLE LINK: NO.1

NO.1

AC208825AM

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35B-70 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

CIRCUIT OPERATION TECHNICAL DESCRIPTION (COMMENT)

A battery positive voltage is applied on the data link The cause is probably a defect in power supply cir-
connector power terminal (terminal 16). The ground cuit or the ground circuit.
terminals (terminal 4, 5) are grounded to the vehicle .

body. TROUBLESHOOTING HINTS

.
The most likely causes for this case are:
• Malfunction of the data link connector
• Damaged wiring harness or connector
.

DIAGNOSIS
Required Special Tool:
• MB991223: Harness Set

STEP 1. Check the power supply circuit. Measure the

voltage at data link connector C-14.
CONNECTOR: C-14
Measure the voltage between terminal 16 and ground. It should
measure approximately 12 volts (battery positive voltage).
Q: Is battery positive voltage (approximately 12 volts)
present?
YES : Go to Step 4.
NO : Go to Step 2.

C-14(B)

DATA LINK
CONNECTOR

AC212151AB

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 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
35B-71

STEP 2. Check the following connectors.

CONNECTOR: C-14 • Data link connector C-14

C-14(B)

AC100188AG

CONNECTORS: C-212, C-214

• Junction block connectors C-212, C-214

C-212 (B)

C-214

CONNECTOR C-212
(HARNESS SIDE)

CONNECTOR C-214
(HARNESS SIDE)

14 13 12 11 10 9 8 7 6 5 4 3 2 1

28 27 26 25 24 23 22 21 20 19 18 17 16 15

AC212152 AB

CONNECTOR: C-126 • Intermediate connector C-126

Check the connectors, for loose, corroded or damaged termi-
nals, or terminals pushed back in the connector.
Q: Are the connectors and terminals in good condition?
YES : Go to Step 3.
NO : Repair it and then go to Step 7.
HARNESS SIDE C-126
3 2 1
AC211265DG

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35B-72 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

STEP 3. Check the following harness wire.

CONNECTOR: C-14 • The wire between data link connector C-14 (terminal 16)
and junction block connector C-212 (terminal 1)
Q: Is the harness wire damaged?
YES : Repair or replace it and then go to Step 7.
NO : Go to Step 7.

C-14(B)

AC100188AG

CONNECTOR: C-212

C-212 (B)

HARNESS SIDE
1
AC211269 BR

STEP 4. Check the ground circuit. Measure the resistance

at data link connector C-14.
CONNECTOR: C-14
Measure the resistance between terminal 4 and ground, and
terminal 5 and ground. It should measure less than 2 ohms.
Q: Is the resistance 2 ohms or less?
YES : Replace the scan tool and then go to Step 7.
NO : Go to Step 5.

C-14(B)

DATA LINK
CONNECTOR
AC212151AC

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 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
35B-73

STEP 5. Check the following connector.

CONNECTOR: C-14 • Data link connector C-14
Check the connector, for loose, corroded or damaged termi-
nals, or terminals pushed back in the connector.
Q: Are the connector and terminals in good condition?
YES : Go to Step 6.
NO : Repair it and then go to Step 7.
C-14(B)

AC100188AG

STEP 6. Check the following harness wires.

CONNECTOR: C-14 • The wire between data link connector C-14 (terminal 4) and
ground (No.7)
• The wire between data link connector C-14 (terminal 5) and
ground (No.7)
Q: Is any harness wire damaged?
YES : Repair or replace it and then go to Step 7.
C-14(B) NO : Go to Step 7.

AC100188AG

GROUND

NO.7

AC211897AB

STEP 7. Retest the system.

Q: Does the scan tool communicate with the whole
system?
YES : The procedure is complete.
NO : Return to Step 1.

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35B-74 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

INSPECTION PROCEDURE 2: Communication between the Scan Tool and the ABS-ECU is not
possible.

ABS-ECU Power Supply /Ground and Data Link Connector Circuit

IGNITION
SWITCH (IG2)

JUNCTION
BLOCK

ABS-ECU
POWER
SUPPLY

JOINT
CONNECTOR (6)

JOINT JOINT
CONNECTOR (4) CONNECTOR (2)

DATA LINK
CONNECTOR FRONT SIDE

AC211711AB

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 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
35B-75
CONNECTOR: B-118 CONNECTORS: C-14,C-23,C-101,C-105,C-124
C-101 (L)

B-118 (B)

C-23 (B) C-124

C-14 (B)
C-105
AC211901AB AC211265 CZ

CONNECTORS: C-210, C-211

C-211

C-210

AC211269 BJ

TECHNICAL DESCRIPTION (COMMENT)

.

CIRCUIT OPERATION
• The DTC is set by the ABS-ECU (terminal 2) to When communication with the scan tool is not possi-
the diagnostic output terminal (terminal 7) of the ble, the cause is probably an open circuit in the ABS-
data link connector. ECU power circuit or an open circuit in the diagnostic
• When the data link connector's diagnostic test output circuit.
mode control terminal (terminal 1) is grounded, .

the ABS-ECU will go into diagnostic mode. TROUBLESHOOTING HINTS

The most likely causes for this case are:
• Blown fuse
.

• Damaged wiring harness or connector

• Malfunction of the brake modulator hydraulic unit
(Integrated with ABS-ECU)
.

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35B-76 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

DIAGNOSIS
Required Special Tool:
• MB991223: Harness Set

STEP 1. Check the power supply circuit. Measure the

voltage at ABS-ECU connector B-118.
CONNECTOR: B-118 (1) Disconnect ABS-ECU connector B-118 and measure at the
harness side.
(2) Start the engine.
(3) Measure the voltage between terminal 10 and ground. It
B-118 (B) should measure battery voltage (approximately 12 volts).
Q: Is battery positive voltage (approximately 12 volts)
present?
YES : Go to Step 4.
NO : Go to Step 2.

CONNECTOR B-118
(HARNESS SIDE)

12 11 10 9 8 7 6 5 4 3 2 1
22 21 20 19 18 17 16 15 14 13
34 33 32 31 30 29 28 27 26 25 24 23

AC212153AC

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 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
35B-77

STEP 2. Check the following connectors.

CONNECTOR: B-118 • ABS-ECU connector B-118

B-118 (B)

HARNESS SIDE

12 11 10 9 8 7 6 5 4 3 2 1
22 21 20 19 18 17 16 15 14 13
34 33 32 31 30 29 28 27 26 25 24 23
AC211901AD

CONNECTORS : C-210, C-211 • Junction block connectors C-210, C-211

C-211

C-210

JUNCTION BLOCK
(FRONT VIEW)

CONNECTOR C-210
(HARNESS SIDE)
6 5 4 3 2 1
14 13 12 11 10 9 8 7

CONNECTOR C-211
(HARNESS SIDE)
2 1
6 5 4 3
AC212152 AC

CONNECTOR : C-124 • Intermediate connector C-124

Check the connectors, for loose, corroded or damaged termi-
nals, or terminals pushed back in the connector.
Q: Are the connectors and terminals in good condition?
YES : Go to Step 3.
NO : Repair it and then go to Step 9.

1 2 3 4 5 6 7 8 9 10 11 12 13
14 15 16 17 18 19 20 2122 23 24 25
AC211265 AR

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35B-78 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

STEP 3. Check the following harness wire.

• The wire between junction block connector C-211 (terminal
CONNECTOR: C-211
2) and ABS-ECU connector B-118 (terminal 10)
Q: Is the harness wire damaged?
YES : Repair or replace it and then go to Step 9.
NO : Go to Step 9.

HARNESS SIDE
2 1
6 5 4 3
JUNCTION BLOCK
(FRONT VIEW) AC211269 AL

CONNECTOR: B-118

B-118 (B)

HARNESS SIDE

12 11 10 9 8 7 6 5 4 3 2 1
22 21 20 19 18 17 16 15 14 13
34 33 32 31 30 29 28 27 26 25 24 23
AC211901AD

STEP 4. Check the ground circuit. Measure the resistance

at ABS-ECU connector B-118.
CONNECTOR: B-118 Measure the resistance between terminal 12 and ground, and
terminal 34 and ground. It should measure less than 2 ohms.
Q: Is the resistance 2 ohms or less?
B-118 (B) YES : Replace the scan tool and then go to Step 7.
NO : Go to Step 5.

12 11 10 9 8 7 6 5 4 3 2 1
22 21 20 19 18 17 16 15 14 13
34 33 32 31 30 29 28 27 26 25 24 23

CONNECTOR B-118
(HARNESS SIDE)

AC212153AE

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 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
35B-79

STEP 5. Check the following connector.

CONNECTOR: B-118 • ABS-ECU connector B-118
Check the connector, for loose, corroded or damaged termi-
nals, or terminals pushed back in the connector.
B-118 (B) Q: Are the connector and terminals in good condition?
YES : Go to Step 6.
NO : Repair it and then go to Step 9.
HARNESS SIDE

12 11 10 9 8 7 6 5 4 3 2 1
22 21 20 19 18 17 16 15 14 13
34 33 32 31 30 29 28 27 26 25 24 23
AC211901AD

STEP 6. Check the following harness wires.

CONNECTOR: B-118 • The wire between ABS-ECU connector B-118 (terminal 12)
and ground (No.14)
• The wire between ABS-ECU connector B-118 (terminal 34)
and ground (No.14)
B-118 (B)
Q: Is any harness wire damaged?
YES : Repair or replace it and then go to Step 9.
HARNESS SIDE NO : Go to Step 9.
12 11 10 9 8 7 6 5 4 3 2 1
22 21 20 19 18 17 16 15 14 13
34 33 32 31 30 29 28 27 26 25 24 23
AC211901AD

GROUND

NO.14

AC211898AB

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35B-80 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

STEP 7. Check the following connectors.

CONNECTOR: C-14 • Data link connector C-14

C-14(B)

AC100188AG

CONNECTORS: C-23, C-101, C-105, C-124 • Joint connectors C-23, C-101, C-105
• Intermediate connector C-124
C-101 (L)

C-23 (B) C-124

C-105

CONNECTOR C-105 CONNECTOR C-23

1 2 3 4 5 6 7 8 9 10 11
12 13 14 15 16 17 18 19 20 21 22 1 2 3 4 5 6 7 8 9 10 11
2324 25 2627 28 2930 31 32 33 12 13 14 15 16 17 18 19 20 21 22

CONNECTOR C-124 CONNECTOR C-101

1 2 3 4 5 6 7 8 9 10 11 12 13 1 2 3 4 5 6 7 8 9 10 11
14 15 16 17 18 19 20 2122 23 24 25 12 13 14 15 16 17 18 19 20 21 22

AC212218 AB

CONNECTOR: B-118 • ABS-ECU connector B-118

Check the connectors, for loose, corroded or damaged termi-
nals, or terminals pushed back in the connector.
B-118 (B) Q: Are the connectors and terminals in good condition?
YES : Go to Step 8.
NO : Repair it and then go to Step 9.
HARNESS SIDE

12 11 10 9 8 7 6 5 4 3 2 1
22 21 20 19 18 17 16 15 14 13
34 33 32 31 30 29 28 27 26 25 24 23
AC211901AD

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 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
35B-81

STEP 8. Check the following harness wires.

CONNECTOR: B-118 • The wire between ABS-ECU connector B-118 (terminal 2)
and data link connector C-14 (terminal 7)
• The wire between ABS-ECU connector B-118 (terminal 5)
and data link connector C-14 (terminal 1)
B-118 (B)
Q: Is any harness wire damaged?
YES : Repair or replace it and then go to Step 9.
HARNESS SIDE NO : Replace the brake modulator hydraulic unit
(integrated with ABS-ECU) (Refer to P.35B-118).
12 11 10 9 8 7 6 5 4 3 2 1

34
22 21 20 19 18 17 16 15 14 13
33 32 31 30 29 28 27 26 25 24 23
Then go to Step 9.
AC211901AD

CONNECTOR: C-14

C-14(B)

AC100188AG

STEP 9. Retest the system.

Q: Does the scan tool communicate with the ABS system?
YES : The procedure is complete.
NO : Return to Step 1.

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35B-82 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

INSPECTION PROCEDURE 3: When the Ignition Key is Turned to the "ON" position (Engine Stopped),
the ABS Warning Light does not Illuminate.

ABS Warning Light Circuit

IGNITION
SWITCH (IG1)

JUNCTION
BLOCK

JOINT
CONNECTOR (4)

COMBINATION
METER

ABS-ECU

AC211712AB

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 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
35B-83
CONNECTOR: B-118 CONNECTORS: C-01, C-02, C-23, C-122
C-01
C-02 (L)

B-118 (B)
C-23 (B)

C-122 (L)
AC211901AB AC211265 DA

CONNECTORS: C-211, C-214

C-211

C-214

AC211269 BK

. .

CIRCUIT OPERATION TECHNICAL DESCRIPTION (COMMENT)

• The ABS warning light power is supplied from the The cause may be an open circuit in the ABS warn-
ignition switch. The ABS-ECU grounds the circuit ing light power supply circuit, a blown ABS warning
to illuminate the light. light bulb, or a short circuit to ground between the
• The ABS-ECU illuminates the ABS warning light ABS warning light and the ABS-ECU.
for 3 seconds while running self-check. This light .

can be illuminated for 3 seconds upon start-up or TROUBLESHOOTING HINTS

when the ignition switch is turned to the "ON" The most likely causes for this case are:
position with engine stopped. • Blown fuse
• When the ABS-ECU connector is disconnected, • Damaged wiring harness or connector
the circuit is grounded to illuminate the light. • Burnt out ABS warning light bulb
• The ABS-ECU controls the continuity to the ABS • Malfunction of the brake modulator hydraulic unit
warning light by turning the power transistor in (integrated with ABS-ECU)
the unit "OFF" and "ON," respectively.
.

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35B-84 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

DIAGNOSIS
Required Special Tool:
• MB991223: Harness Set
.

STEP 1. Check the ABS warning light circuit at ABS-ECU

connector B-118.
CONNECTOR: B-118 (1) Disconnect ABS-ECU connector B-118.
(2) Turn the ignition switch to the "ON" position.
Q: Does the ABS warning light illuminate?
B-118 (B) YES : Replace the brake modulator hydraulic unit
(integrated with ABS-ECU) (Refer to P.35B-118).
Then go to Step 10.
HARNESS SIDE NO : Go to Step 2.
12 11 10 9 8 7 6 5 4 3 2 1
22 21 20 19 18 17 16 15 14 13
34 33 32 31 30 29 28 27 26 25 24 23
AC211901AD

STEP 2. Check the power supply circuit. Measure the

voltage at combination meter connector C-01.
CONNECTOR: C-01 (1) Disconnect combination meter connector C-01 and
measure at the harness side.
(2) Start the engine.
(3) Measure the voltage between terminal 9 and ground. It
should measure battery voltage (approximately 12 volts).
Q: Is battery positive voltage (approximately 12 volts)
present?
YES : Go to Step 5.
NO : Go to Step 3.

CONNECTOR C-01
(HARNESS SIDE)
21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1

AC212218 AC

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 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
35B-85

STEP 3. Check the following connectors.

CONNECTORS: C-01, C-23 • Combination meter connector C-01
C-01

C-23 (B)

CONNECTOR C-01
(HARNESS SIDE)
21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1

CONNECTOR C-23

1 2 3 4 5 6 7 8 9 10 11
12 13 14 15 16 17 18 19 20 21 22

AC212218AE

CONNECTORS: C-211, C-214

• Junction block connectors C-211, C-214
• Joint connector C-23
C-211
Check the connectors, for loose, corroded or damaged termi-
nals, or terminals pushed back in the connector.
Q: Are the connectors and terminals in good condition?
YES : Go to Step 4.
C-214
NO : Repair it and then go to Step 10.

JUNCTION BLOCK CONNECTOR C-211

(FRONT VIEW) (HARNESS SIDE)
2 1
6 5 4 3

CONNECTOR C-214
(HARNESS SIDE)

14 13 12 11 10 9 8 7 6 5 4 3 2 1

28 27 26 25 24 23 22 21 20 19 18 17 16 15

AC212152AD

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35B-86 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

STEP 4. Check the following harness wire.

• The wire between junction block connector C-211 (terminal
CONNECTOR: C-211
6) and combination meter connector C-01 (terminal 9)
Q: Is the harness wire damaged?
YES : Repair or replace it and then go to Step 10.
NO : Go to Step 10.

HARNESS SIDE
2 1
6 5 4 3
JUNCTION BLOCK
(FRONT VIEW) AC211269 AL

CONNECTOR: C-01
C-01

HARNESS SIDE
21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
AC211265DF

STEP 5. Check the ground circuit at combination meter

connector C-02.
CONNECTOR: C-02 (1) Disconnect combination meter connector C-02 and
C-02 (L) measure at the harness side.
(2) Measure the resistance between terminal 48 and ground. It
should measure less than 2 ohms.
Q: Is the resistance 2 ohms or less?
YES : Go to Step 8.
NO : Go to Step 6.

CONNECTOR C-02
(HARNESS SIDE)
515049 48 4746 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31

AC212218 AD

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 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
35B-87

STEP 6. Check the following connector.

CONNECTOR : C-02 • Combination meter connector C-02
Check the connector, for loose, corroded or damaged termi-
nals, or terminals pushed back in the connector.
Q: Are the connector and terminals in good condition?
YES : Go to Step 7.
NO : Repair it and then go to Step 10.

HARNESS SIDE
515049 48 4746 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31
AC211265 AI

STEP 7. Check the following harness wire.

CONNECTOR : C-02 • The wire between combination meter connector C-02 (ter-
minal 48) and ground (No.7)
Q: Is the harness wire damaged?
YES : Repair or replace it and then go to Step 10.
NO : Go to Step 10.

HARNESS SIDE
515049 48 4746 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31
AC211265 AI

GROUND

NO.7

AC211897AB

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35B-88 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

STEP 8. Check the following connectors.

CONNECTOR: C-01 • Combination meter connector C-01
C-01

HARNESS SIDE
21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
AC211265DF

CONNECTOR: C-122 • Intermediate connector C-122

C-122 (L)
1 2 3 4 5 6 7 8 9 10 11
12 13 14 15 16 17 18 19 20 21 22 AC211265 DD

CONNECTOR: B-118 • ABS-ECU connector B-118

Check the connectors, for loose, corroded or damaged termi-
nals, or terminals pushed back in the connector.
B-118 (B) Q: Are the connectors and terminals in good condition?
YES : Go to Step 9.
NO : Repair it and then go to Step 10.
HARNESS SIDE

12 11 10 9 8 7 6 5 4 3 2 1
22 21 20 19 18 17 16 15 14 13
34 33 32 31 30 29 28 27 26 25 24 23
AC211901AD

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 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
35B-89

STEP 9. Check the following harness wire.

CONNECTOR: C-01 • The wire between combination meter connector C-01 (ter-
C-01 minal 13) and ABS-ECU connector B-118 (terminal 27)
Q: Is the harness wire damaged?
YES : Repair or replace it and then go to Step 10.
NO : Replace the combination meter (Refer to GROUP
54A, Combination Meter Assembly and Vehicle
Speed Sensor P.54A-81). Then go to Step 10.
HARNESS SIDE
21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
AC211265DF

CONNECTOR: B-118

B-118 (B)

HARNESS SIDE

12 11 10 9 8 7 6 5 4 3 2 1
22 21 20 19 18 17 16 15 14 13
34 33 32 31 30 29 28 27 26 25 24 23
AC211901AD

STEP 10. Retest the system.

Q: Does the ABS warning light illuminate for 3 seconds
when the ignition switch is turned to the "ON" position
with engine stopped or upon start-up?
YES : The procedure is complete.
NO : Return to Step 1.

INSPECTION PROCEDURE 4: The ABS Warning Light Remains Illuminated after the Engine is Started.

NOTE: This diagnosis procedure is limited to cases where communication with the scan tool is possible
(ABS-ECU power supply is normal) and no diagnostic trouble code outputs.
TECHNICAL DESCRIPTION (COMMENT)
.

ABS Warning Light Circuit

Refer to P.35B-82. The cause is probably the ABS-ECU malfunction.
.

TROUBLESHOOTING HINTS
.

CIRCUIT OPERATION
Refer to P.35B-82. The most likely causes for this case are:
• Damaged wiring harness or connector
.
• Malfunction of the brake modulator hydraulic unit
(integrated with ABS-ECU)
.

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35B-90 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

DIAGNOSIS
Required Special Tool:
• MB991223: Harness Set
.

STEP 1. Check the following connectors.

CONNECTORS: C-01, C-122 • Combination meter connector C-01
C-01 • Intermediate connector C-122

C-122 (L)

CONNECTOR C-01
(HARNESS SIDE)
21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1

CONNECTOR C-122

1 2 3 4 5 6 7 8 9 10 11
12 13 14 15 16 17 18 19 20 21 22

AC212218AF

CONNECTOR: B-118 • ABS-ECU connector B-118

Check the connectors, for loose, corroded or damaged termi-
nals, or terminals pushed back in the connector.
B-118 (B) Q: Are the connectors and terminals in good condition?
YES : Go to Step 2.
NO : Repair it and then go to Step 4.
HARNESS SIDE

12 11 10 9 8 7 6 5 4 3 2 1
22 21 20 19 18 17 16 15 14 13
34 33 32 31 30 29 28 27 26 25 24 23
AC211901AD

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 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
35B-91

STEP 2. Check the following harness wire.

CONNECTOR: C-01 • The wire between combination meter connector C-01 (ter-
C-01 minal 13) and ABS-ECU connector B-118 (terminal 27)
Q: Is the harness wire damaged?
YES : Repair or replace it and then go to Step 4.
NO : Go to Step 3.

HARNESS SIDE
21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
AC211265DF

CONNECTOR: B-118

B-118 (B)

HARNESS SIDE

12 11 10 9 8 7 6 5 4 3 2 1
22 21 20 19 18 17 16 15 14 13
34 33 32 31 30 29 28 27 26 25 24 23
AC211901AD

STEP 3. Check the ABS warning light circuit at ABS-ECU

connector B-118.
CONNECTOR: B-118 (1) Disconnect ABS-ECU connector B-118 and check at the
harness side connector.
(2) Turn the ignition switch to the "ON" position.
(3) Ground terminal 27 and check the ABS warning light.
B-118 (B)
Q: Does the ABS warning light go off?
YES : Replace the brake modulator hydraulic unit
(integrated with ABS-ECU) (Refer to P.35B-118).
Then go to Step 4.
NO : Replace the combination meter (Refer to GROUP
54A, Combination Meter Assembly and Vehicle
Speed Sensor P.54A-81). Then go to Step 4.
CONNECTOR B-118
(HARNESS SIDE)

12 11 10 9 8 7 6 5 4 3 2 1
22 21 20 19 18 17 16 15 14 13
34 33 32 31 30 29 28 27 26 25 24 23

AC212153AF

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35B-92 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

STEP 4. Retest the system.

Q: Does the ABS warning light turn off in 3 seconds after
start-up?
YES : The procedure is complete.
NO : Return to Step 1.

INSPECTION PROCEDURE 5: In the Inspection with the Scan Tool Service Data, the Parking Brake
Switch is not Turned ON or Turned OFF.

Parking Brake Switch Circuit

ABS-ECU

JOINT
CONNECTOR (4)

PARKING
BRAKE
SWITCH

AC211714AB

CONNECTOR: B-118 CONNECTORS: C-23, C-124

B-118 (B)

C-23 (B)

C-124

AC211901AB AC211265 DB

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 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
35B-93
CONNECTOR: D-28

D-28 (B)

AC211902 AC

. .

CIRCUIT OPERATION TROUBLESHOOTING HINTS

The ABS-ECU monitors the parking brake switch to The most likely causes for this case are:
optimize the ABS control. • Damaged wiring harness or connector
.
• Malfunction of the parking brake switch
TECHNICAL DESCRIPTION (COMMENT) • Malfunction of the brake modulator hydraulic unit
The cause may be an open or a short circuit between (integrated with ABS-ECU)
the parking brake switch and the ABS-ECU.
.

DIAGNOSIS
Required Special Tools:
• MB991223: Harness Set
• MB991502: Scan Tool (MUT-II)
• MB991958: Scan Tool (MUT-III Sub Assembly)
• MB991824: V.C.I.
• MB991827: USB Cable
• MB991910: Main Harness A

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35B-94 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

STEP 1. Using scan tool MB991502 or MB991958, check

data list item 29: parking brake switch.
CAUTION
To prevent damage to scan tool MB991502 or MB991958,
always turn the ignition switch to the "LOOK" (OFF) posi-
tion before connecting or disconnecting scan tool
MB991502 or MB991958.
(1) Connect scan tool MB991502 or MB991958 as shown in
the illustration.
(2) Start the engine.
(3) Set scan tool MB991502 or MB991958 to data reading
16-PIN mode for following item.
• Item 29: Parking brake switch
(4) Confirm the indicated ON/OFF state as follows:
MB991502 CHECKING REQUIREMENT DISPLAY

AC207179AB
Pull the parking brake lever ON
Release the parking brake lever OFF

Q: Is the parking brake switch input normal?

YES : This malfunction is intermittent. Refer to GROUP 00,
16-PIN How to Use Troubleshooting/Inspection Service
Points − How to Cope With Intermittent Malfunction
P.00E-2.
NO : Go to Step 2.

MB991911

MB991824

MB991827 AC210056AC

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 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
35B-95

STEP 2. Check the parking brake switch circuit at ABS-

ECU connector B-118.
CONNECTOR: B-118 (1) Disconnect ABS-ECU connector B-118 and measure at the
harness side.
(2) Check for continuity between terminal 1 and ground with
pulling or releasing the parking brake lever. If the parking
B-118 (B) brake lever is pulled, there should be no continuity, and if
the parking brake lever is released, there should be
continuity (less than 2 ohms).
Q: Does continuity exist when the parking brake lever is
released, and dose continuity not exist when the
parking brake lever is pulled?
YES : Go to Step 3.
CONNECTOR B-118 NO : Go to Step 4.
(HARNESS SIDE)

12 11 10 9 8 7 6 5 4 3 2 1
22 21 20 19 18 17 16 15 14 13
34 33 32 31 30 29 28 27 26 25 24 23

AC212153AG

STEP 3. Check the following connector.

CONNECTOR: B-118 • ABS-ECU connector B-118
Check the connector, for loose, corroded or damaged termi-
nals, or terminals pushed back in the connector.
B-118 (B) Q: Are the connector and terminals in good condition?
YES : Replace the brake modulator hydraulic unit
(integrated with ABS-ECU) (Refer to P.35B-118).
HARNESS SIDE Then go to Step 6.
NO : Go to Step 6.
12 11 10 9 8 7 6 5 4 3 2 1
22 21 20 19 18 17 16 15 14 13
34 33 32 31 30 29 28 27 26 25 24 23
AC211901AD

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35B-96 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

STEP 4. Check the following connectors.

CONNECTOR: B-118 • ABS-ECU connector B-118

B-118 (B)

HARNESS SIDE

12 11 10 9 8 7 6 5 4 3 2 1
22 21 20 19 18 17 16 15 14 13
34 33 32 31 30 29 28 27 26 25 24 23
AC211901AD

CONNECTORS: C-23, C-124 • Intermediate connector C-124

• Joint connector C-23

C-23 (B)

C-124

CONNECTOR C-23

1 2 3 4 5 6 7 8 9 10 11
12 13 14 15 16 17 18 19 20 21 22

CONNECTOR C-124

1 2 3 4 5 6 7 8 9 10 11 12 13
14 15 16 17 18 19 20 2122 23 24 25

AC212218 AG

CONNECTOR: D-28 • Parking brake switch connector D-28

Check the connectors, for loose, corroded or damaged termi-
nals, or terminals pushed back in the connector.

D-28 (B)
Q: Are the connectors and terminals in good condition?
YES : Go to Step 5.
NO : Repair it and then go to Step 6.
HARNESS SIDE
1

AC211902AH

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 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
35B-97

STEP 5. Check the following harness wire.

CONNECTOR: D-28 • The wire between parking brake switch connector D-28 (ter-
minal 1) and ABS-ECU connector B-118 (terminal 1)
Q: Is the harness wire damaged?
D-28 (B) YES : Repair or replace it and then go to Step 6.
NO : Replace the parking brake switch (Refer to GROUP
36, Parking Brake Lever P.36-6). Then go to Step 6.
HARNESS SIDE
1

AC211902AH

CONNECTOR: B-118

B-118 (B)

HARNESS SIDE

12 11 10 9 8 7 6 5 4 3 2 1
22 21 20 19 18 17 16 15 14 13
34 33 32 31 30 29 28 27 26 25 24 23
AC211901AD

STEP 6. Retest the system.

Q: Does the parking brake switch turn ON/OFF normally in
the inspection by scan tool service data?
YES : The procedure is complete.
NO : Return to Step 1.

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35B-98 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

INSPECTION PROCEDURE 6: The Neutral Position Learning of the Steering Angular Velocity Sensor
is not Finished.

Stoplight Switch Circuit

BATTERY

RELAY
BOX

STOPLIGHT
SWITCH

STOPLIGHT

JOINT
CONNECTOR (6)

ABS-ECU

AC211715AB

CONNECTOR: B-118 CONNECTORS: C-102, C-105, C-124, C-129

B-118 (B)
C-102

C-129 C-124
C-105
AC211901AB AC211265 DC

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 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
35B-99
FUSE: NO.10

NO.10

AC208825AN

. .

CIRCUIT OPERATION TROUBLESHOOTING HINTS

The ABS finishes the neutral position learning of the The most likely causes for this case are:
steering angular velocity sensor by the signal from • Damaged wiring harness or connector
the stoplight. • Malfunction of the stoplight switch system
.
• Equipment the odd diameter tire
TECHNICAL DESCRIPTION (COMMENT) • Malfunction of suspension
The diagnosis is difficult because it depends on driv- • Malfunction of the steering angular velocity sen-
ing condition and road surface, if the diagnostic trou- sor installation
ble code has not been set, carry out the following • Malfunction of the brake modulator hydraulic unit
checks (refer to TROUBLESHOOTING HINTS). (integrated with ABS-ECU)
.

DIAGNOSIS
Required Special Tools:
• MB991223: Harness Set
• MB991502: Scan Tool (MUT-II)
• MB991958: Scan Tool (MUT-III Sub Assembly)
• MB991824: V.C.I.
• MB991827: USB Cable
• MB991910: Main Harness A

STEP 1. Check the front tires.

Q: Is the odd diameter tire equipped?
YES : Equip the appropriate tire and then go to Step 13.
NO : Go to Step 2.

STEP 2. Check the front suspension.

Q: Is the front suspension abnormal?
YES : Repair the front suspension and then go to Step 13.
NO : Go to Step 3.

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35B-100 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

STEP 3. Using scan tool MB991502 or MB991958, check

data list item 37: steering angular velocity sensor straight
ahead position learning.
CAUTION
To prevent damage to scan tool MB991502 or MB991958,
always turn the ignition switch to the "LOOK" (OFF) posi-
tion before connecting or disconnecting scan tool
MB991502 or MB991958.
(1) Connect scan tool MB991502 or MB991958 as shown in
the illustration.
(2) Start the engine.
(3) Set scan tool MB991502 or MB991958 to data reading
16-PIN mode for following item.
• Item 37: Steering angular sensor neutral position learn-
ing
(4) Confirm the indicated ON/OFF state as follows:
MB991502
CHECKING REQUIREMENT DISPLAY
AC207179AB
After driving straightly with vehicle speed ON
more than 10 km/h (6.3 mph)
Before driving with ignition switch ON OFF

Q: Is the steering angular velocity sensor straight ahead

16-PIN
position learning input normal?
YES : Go to Step 5.
NO : Confirm the steering angular velocity sensor correct
installation and then go to Step 4.

MB991911

MB991824

MB991827 AC210056AC

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 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
35B-101

STEP 4. Check for steering angular velocity sensor output

voltage.
CONNECTOR: C-230 (1) Connect steering angular velocity sensor connector C-230.
(2) Turn the ignition switch to the "ON" position.

CONNECTOR C-230
(HARNESS SIDE)
1
5 4 3 2

AC212249AD

VARIATIONS IN VOLTAGE WHEN TURNING (3) Measure the voltage, by backprobing, between terminal 1
THE STEERING WHEEL LATERALLY and ground, terminal 4 and ground, and terminal 5 and
VOLTAGE ground. The voltage should measure as indicated in the
figure.
2.7 - 4.4 V Q: Is the steering angular velocity sensor output voltage
normal?
0.8 - 2.1 V YES : Go to Step 13.
NO : Replace the steering angular velocity sensor (Refer to
TIME P.35B-124.) and then go to Step 13.
AC211894 AB

STEP 5. Check the stoplight.

Q: Does the stoplight turn on and off normally?
YES : Go to Step 9.
NO : Go to Step 6.

STEP 6. Check the stoplight switch installation condition.

Q: Is the stoplight switch installed correctly?
YES : Check the stoplight switch (Refer to GROUP 35A,
Brake pedal P.35A-23). Then go to Step 7.
NO : Repair the installation of the stoplight switch (Refer to
GROUP 35A, On-vehicle Service - Brake pedal
Check and Adjustment P.35A-12). Then go to Step
13.

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35B-102 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

STEP 7. Check the following connectors.

CONNECTORS: C-102, C-129
• Intermediate connectors C-129
• Stoplight switch connector C-102
Check the connectors, for loose, corroded or damaged termi-
nals, or terminals pushed back in the connector.
Q: Are the connectors and terminals in good condition?
C-102
YES : Go to Step 8.
NO : Repair it and then go to Step 13.
C-129

CONNECTOR C-102
(HARNESS SIDE)
2 1
4 3

CONNECTOR C-129

1 2 3 4 5 6 7 8 9 10 11 12 13
14 15 16 17 18 19 20 2122 23 24 25

AC212218AH

STEP 8. Check the following harness wires.

FUSE: NO.10 • The wire between relay box in engine compartment (fuse
No.10) and stoplight switch connector C-102 (terminal 2)
• The wire between stoplight switch connector C-102 (termi-
NO.10 nal 1) and stoplights
Q: Is any harness wire damaged?
YES : Repair or replace it and then go to Step 13.
NO : Go to Step 9.

AC208825AN

CONNECTOR: C-102

C-102

HARNESS SIDE
2 1
4 3
AC211265DH

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 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
35B-103

STEP 9. Check the stoplight switch circuit. Measure the

voltage at ABS-ECU connector B-118.
CONNECTOR: B-118 (1) Disconnect ABS-ECU connector B-118 and measure at the
harness side.
(2) Depress the brake pedal to turn on the stoplight switch.
(3) Measure the voltage between terminal 19 and ground. It
B-118 (B) should measure battery voltage (approximately 12 volts).
Q: Is battery positive voltage (approximately 12 volts)
present?
YES : Go to Step 12.
NO : Go to Step 10.

CONNECTOR B-118
(HARNESS SIDE)

12 11 10 9 8 7 6 5 4 3 2 1
22 21 20 19 18 17 16 15 14 13
34 33 32 31 30 29 28 27 26 25 24 23

AC212153AH

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35B-104 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

STEP 10. Check the following connectors.

CONNECTOR: B-118 • ABS-ECU connector B-118

B-118 (B)

HARNESS SIDE

12 11 10 9 8 7 6 5 4 3 2 1
22 21 20 19 18 17 16 15 14 13
34 33 32 31 30 29 28 27 26 25 24 23
AC211901AD

CONNECTORS: C-102, C-105, C-124 • Joint connector C-105

• Intermediate connector C-124
• Stoplight switch connector C-102
Check the connectors, for loose, corroded or damaged termi-
nals, or terminals pushed back in the connector.
C-124 Q: Are the connectors and terminals in good condition?
C-102
YES : Go to Step 11.
NO : Repair it and then go to Step 13.
C-105

CONNECTOR C-102 CONNECTOR C-105

(HARNESS SIDE) 1 2 3 4 5 6 7 8 9 10 11
12 13 14 15 16 17 18 19 20 21 22
2 1 2324 25 2627 28 2930 31 32 33
4 3

CONNECTOR C-124

1 2 3 4 5 6 7 8 9 10 11 12 13
14 15 16 17 18 19 20 2122 23 24 25

AC212218AI

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 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
35B-105

STEP 11. Check the following harness wire.

CONNECTOR: C-102 • The wire between stoplight switch connector C-102 (termi-
nal 1) and ABS-ECU connector B-118 (terminal 19)
Q: Is the harness wire damaged?
YES : Repair or replace it and then go to Step 13.
NO : Go to Step 13.
C-102

HARNESS SIDE
2 1
4 3
AC211265DH

CONNECTOR: B-118

B-118 (B)

HARNESS SIDE

12 11 10 9 8 7 6 5 4 3 2 1
22 21 20 19 18 17 16 15 14 13
34 33 32 31 30 29 28 27 26 25 24 23
AC211901AD

STEP 12. Check the following connector.

CONNECTOR: B-118 • ABS-ECU connector B-118
Check the connector, for loose, corroded or damaged termi-
nals, or terminals pushed back in the connector.
B-118 (B) Q: Are the connector and terminals in good condition?
YES : Replace the brake modulator hydraulic unit
(integrated with ABS-ECU) (Refer to P.35B-118).
HARNESS SIDE Then go to Step 13.
NO : Repair it and then go to Step 13.
12 11 10 9 8 7 6 5 4 3 2 1
22 21 20 19 18 17 16 15 14 13
34 33 32 31 30 29 28 27 26 25 24 23
AC211901AD

STEP 13. Retest the system.

Q: Does the neutral position learning of the steering
angular velocity sensor finish?
YES : The procedure is complete.
NO : Return to Step 1.

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35B-106 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

INSPECTION PROCEDURE 7: Faulty ABS Operation

. .

TECHNICAL DESCRIPTION (COMMENT) TROUBLESHOOTING HINT

The cause depends on driving and road surface con- The most likely causes for this case is:
ditions, so diagnosis may be difficult. However, if no • Malfunction of the brake modulator hydraulic unit
diagnostic trouble code is set, carry out the following
inspection.
.

DIAGNOSIS
Check the brake modulator hydraulic unit (Refer to P.35B-114).
If the brake modulator hydraulic unit (integrated with ABS-ECU)
is malfunctioning, replace it. Then check that the malfunction
symptom is eliminated.
DATA LIST REFERENCE TABLE
M1352011500519
The following items can be read by the scan tool
from the ABS-ECU input data.
MUT-II SCAN ITEM CHECK ITEM CHECKING REQUIREMENT NORMAL
TOOL NO. VALUE
DISPLAY
FR SNSR 11 Front-right ABS sensor Drive the vehicle Vehicle speeds
FL SNSR 12 Front-left ABS sensor displayed on the
speedometer
RR SNSR 13 Rear-right ABS sensor and scan tool are
RL SNSR 14 Rear-left ABS sensor identical.
BATT. 21 ABS-ECU power supply Ignition switch: ON 10 − 16 V
VOLTAGE voltage
PARKING 29 Parking brake switch Pull the parking brake lever. ON
SW Release the parking brake lever. OFF
G 32 Longitudinal G-sensor When vehicle stops. 2.4 − 2.6 V
S(STRAIGHT When vehicle drives. 1.0 − 4.0 V
)
STOP LAMP 36 Stoplight switch Depress the brake pedal. ON
SW Release the brake pedal. OFF
ST-N 37 Steering angular velocity After driving straightly with vehicle ON
MEMORY sensor neutral position speed more than 10 km/h (6.3 mph).
learning Before driving with ignition switch ON. OFF
G 71 Lateral G-sensor When vehicle stops. 2.4 − 2.6 V
S(LATERAL) When vehicle drives. 1.0 − 4.0 V
ST-N 74 Steering angular velocity Ignition switch: ON Steering: Neutral ON
sensor (ST-N) position and
position near by ±
360°
Steering: Except OFF
for above

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 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
35B-107
MUT-II SCAN ITEM CHECK ITEM CHECKING REQUIREMENT NORMAL
TOOL NO. VALUE
DISPLAY
ST-1 75 Steering angular velocity Ignition switch: ON Steering: Turn Display ON and
sensor (ST-1) laterally slowly. OFF alternately
ST-2 76 Steering angular velocity
sensor (ST-2)
ST ANGLE 86 Steering degree • Ignition switch: Steering: Steer by + 90°
ON 90° to the right.
• Steering Steering: Neutral OFF
angular velocity
sensor neutral Steering: Steer by - 90°
position 90° to the left.
learning is
finished
(service data
No. 37 displays
ON).

ACTUATOR TEST REFERENCE TABLE

M1352011600475
The scan tool activates the following actuators for NOTE: Actuator testing is only possible when the
testing. vehicle is stationary.
NOTE: If the ABS-ECU runs down, actuator testing
cannot be carried out.
.

ACTUATOR TEST SPECIFICATIONS

ACTIVATION PATTERN
NO. ITEM PARTS TO BE
END OF
ACTIVATED
START OF
FORCED FORCED
ACTION ACTION 01 Solenoid valve for Solenoid valves and
front-left wheel pump motors in the
SOLENOID A
hydraulic unit (simple
VALVE 02 Solenoid valve for
B 1s inspection mode)
C
front-right wheel
2s
0.05 s 0.01 s 03 Solenoid valve for
PUMP ON rear-left wheel
MOTOR OFF
04 Solenoid valve for
rear-right wheel

NOTE
A: HYDRAULIC PRESSURE INCREASES
B: HYDRAULIC PRESSURE HOLDS
C: HYDRAULIC PRESSURE DECREASES

AC100172 AC

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35B-108 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

CHECK AT ABS-ECU
M1352011800509
Use the following steps to remove the connector
cover of the ABS-ECU and then measure the termi-
nal voltage.
1. Move the lock lever of the ABS-ECU connector as shown in
the illustration, and then disconnect the ABS-ECU
connector.

LOCK LEVER
AC211555AB

2. Push up and unlock the hooks of the ABS-ECU connector

shown in the illustration, then remove the connector cover.

AC211694AB

NOTE: Do not measure terminal voltage for approxi-

.

TERMINAL VOLTAGE CHECK CHART

mately three seconds after the ignition switch is
1. Measure the voltages between terminals (12)
turned "ON." The ABS-ECU performs the initial
(ground terminal) and each respective terminal.
check during that period.
2. The terminal layouts are shown in the illustrations
below.

AC211716

CONNECTOR SIGNAL CHECKING REQUIREMENT NORMAL

TERMINAL NO CONDITION
1 Parking brake switch Pull the parking brake lever. 1 V or less
Release the parking brake lever. Battery positive
voltage
2 Scan tool When the scan tool is connected Serial
communication
with Scan tool
When the scan tool is not connected 1 V or less
4 Steering angular Ignition Steering wheel: Neutral 0.8 − 2.1 V
velocity sensor (ST- switch: "ON" position and position near by ±
N) 360°
Steering wheel: Except for 2.7 − 4.4 V
above

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 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
35B-109
CONNECTOR SIGNAL CHECKING REQUIREMENT NORMAL
TERMINAL NO CONDITION
5 Diagnosis When the scan tool is connected Approximately 0 V
changeover input When the scan tool is not connected Battery positive
voltage
10 ABS-ECU power Ignition switch: "ON" Battery positive
supply voltage
Ignition switch: "START" or "ACC" Approximately 0 V
11 Solenoid valve power Always Battery positive
supply voltage
14 Lateral G-sensor Ignition switch: "ON" 2.4 − 2.6 V
input (horizontal
position)
15 Longitudinal G- Always 0V
sensor ground
17 Steering angular Ignition Steering wheel: Turn laterally Variation in the
velocity sensor (ST-2) switch: "ON" voltage value 0.8 −
2.1 V and 2.7 − 4.4
V
19 Stoplight monitor Ignition Stoplight switch: "ON" Battery positive
input switch: "ON" voltage
Stoplight switch: "OFF" 1 V or less
24 Lateral G-sensor Always 0V
ground
25 Longitudinal G- Ignition switch: "ON" 2.4 − 2.6 V
sensor input (horizontal
position)
26 Steering angular Ignition Steering wheel: Turn laterally Variation in the
velocity sensor (ST-1) switch: "ON" voltage value 0.8 −
2.1 V and 2.7 − 4.4
V
27 ABS-ECU warning Ignition When the light is switched off 1 V or less
light transistor output switch: "ON" When the light is illuminated 7 V or more
33 Motor power supply Always Battery positive
voltage
.

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35B-110 ANTI-LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

RESISTANCE AND CONTINUITY BETWEEN 2. Check the resistance and continuity between the
HARNESS-SIDE CONNECTOR TERMINALS terminals indicated in the table below.
1. Turn the ignition switch to the "LOCK" (OFF) 3. The terminal layout is shown in the illustration.
position and disconnect the ABS-ECU connectors
before checking resistance and continuity.

AC211717

CONNECTOR TERMINAL NO. SIGNAL NORMAL CONDITION

6−7 Rear-left ABS sensor 1.24 − 1.64 kΩ
8−9 Rear-right ABS sensor 1.24 − 1.64 kΩ
22 − 31 Front-left ABS sensor 1.24 − 1.64 kΩ
29 − 30 Front-right ABS sensor 1.24 − 1.64 kΩ
12 − body ground Ground Less than 2 ohms
34 − body ground Ground Less than 2 ohms

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 ANTI-LOCK BRAKING SYSTEM (ABS)
SPECIAL TOOLS
35B-111
SPECIAL TOOLS
M1352000600545

TOOL TOOL NUMBER AND SUPERSESSION APPLICATION

NAME
MB991502 MB991496-OD For communication with
Scan tool (MUT-II) ABS-ECU
• Diagnostic trouble
code reading
B991502 • Service data reading
• Actuator testing
MB991958 For communication with
A A: MB991824 ABS-ECU
B: MB991827 • Diagnostic trouble
C: MB991910 code reading
D: MB991911 • Service data reading
MB991824
E: MB991914 • Actuator testing
F: MB991825
B G: MB991826
MUT-III Sub Assembly
A: Vehicle
Communication Interface
MB991827
B: MUT-III USB Cable
C C: MUT-III Main Harness
A (Vehicles with CAN
communication system)
D: MUT-III Main Harness
MB991910 B (Vehicles without CAN
D
communication system)
E: MUT-III Main Harness
C (for Chrysler models
only)
F: MUT-III Adapter
MB991911
Harness
E G: MUT-III Trigger
Harness

MB991914

MB991825

MB991826
MB991958

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35B-112 ANTI-LOCK BRAKING SYSTEM (ABS)
ON-VEHICLE SERVICE

TOOL TOOL NUMBER AND SUPERSESSION APPLICATION

NAME
MB991529 Tool not necessary if scan For checking of ABS
Diagnostic trouble code tool (MUT-II) is available. (Diagnostic trouble code
check harness display when using the
ABS warning light)
MB991529

MB991348 − For checking of G-sensor

The harness set

MB991348

ON-VEHICLE SERVICE
ABS SENSOR OUTPUT VOLTAGE
MEASUREMENT
M1352001600430
Lift up the vehicle and release the parking brake.
1. Move the lock lever of the ABS-ECU connector as shown,
and then disconnect the ABS-ECU connector.

LOCK LEVER
AC211555AB

2. Push up and unlock the hooks of the ABS-ECU connector

shown in the illustration, then remove the connector cover.

AC211694AB

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 ANTI-LOCK BRAKING SYSTEM (ABS)
ON-VEHICLE SERVICE
35B-113
3. Manually turn the wheel to be measured 1/2 to 1 turn/
second. Measure the output voltage with a voltmeter or
oscilloscope.
TERMINAL NO.
Front left Front right Rear left Rear right
22 29 6 8
31 30 7 9
AC211695AB
Output voltage:
• Minimal voltmeter reading: 42 mV
• Maximum voltmeter reading: 300 mV
• Minimal oscilloscope reading: 120 mV
• Maximum oscilloscope reading: 600 mV
Probable causes of low output voltage
• ABS sensor pole piece-to-ABS rotor clearance too large
• Faulty ABS sensor
NOTE: Check the connection of the ABS sensor harness
and connector before using the oscilloscope.
4. To observe the waveform with an oscilloscope:
• Front Wheels: Shift into low gear and drive the wheels.
• Rear Wheels: Turn the wheels manually at a constant
speed.
WHEN TURNED MANUALLY NOTE: The output waveform is low when the wheel speed is
low. Similarly, it will be higher as the wheel speed increases.
Waveform may also be observed by driving the vehicle.

[10.0 ms/DIV 1 V/DIV]

IN LOW GEAR, IDLING

[5 − 6 km/h (3 − 4 mph)]

[10.0 ms/DIV 1 V/DIV]

AC000949 AB

POINTS IN WAVEFORM MEASUREMENT

SYMPTOM PROBABLE CAUSES REMEDY
Too small or zero waveform Faulty ABS sensor Replace ABS sensor
amplitude
Waveform amplitude fluctuates Axle hub eccentric or with large Replace hub assembly
excessively (This is no problem if runout
the minimum amplitude is 100 mV Faulty ABS-ECU ground Repair harness wires
or more)

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35B-114 ANTI-LOCK BRAKING SYSTEM (ABS)
ON-VEHICLE SERVICE

SYMPTOM PROBABLE CAUSES REMEDY

Noisy or disturbed waveform Open circuit in ABS sensor Replace ABS sensor
Open circuit in harness Repair harness wire
Incorrectly mounted ABS sensor Mount ABS sensor correctly
ABS rotor with missing or Replace ABS rotor
damaged teeth
NOTE: The ABS sensor cable moves in relation to motion of the front or rear suspension. Therefore, it is
likely that it has an open circuit only when driving on rough roads but it functions normally when driving on
smooth roads. It is recommended to observe sensor output voltage waveform also under special conditions,
such as driving on a rough road.

HYDRAULIC UNIT CHECK

M1352001700426

Required Special Tool:

• MB991502: Scan Tool (MUT-II) or
• MB991958: Scan Tool (MUT-III Sub Assembly)
• MB991824: V.C.I.
• MB991827: USB Cable
• MB991910: Main Harness A
CAUTION
• The roller of the braking force tester and the tire should
be dry during testing.
• When testing the front brakes, apply the parking brake.
When testing the rear brakes, stop the front wheels
with chocks.
1. Jack up the vehicle. Then support the vehicle with rigid
racks at the specified jack-up points or place the front or rear
wheels on the rollers of the braking force tester.
2. Release the parking brake, and feel the drag force (drag
torque) on each road wheel. When using the braking force
tester, take a reading of the brake drag force.
3. Turn the ignition switch to the "LOCK" (OFF) position.

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 ANTI-LOCK BRAKING SYSTEM (ABS)
ON-VEHICLE SERVICE
35B-115
CAUTION
To prevent damage to scan tool MB991502 or MB991958,
always turn the ignition switch to the "LOOK" (OFF) posi-
tion before connecting or disconnecting scan tool
MB991502 or MB991958.
4. Connect scan tool MB991502 or MB991958 as shown in
the illustration.
5. After checking that the shift lever is in neutral, start the
engine.
16-PIN
6. Use scan tool MB991502 or MB991958 to force-drive the
actuator. For scan tool MB991958, follow the steps below.
(1) Select "Interactive Diagnosis" from the start-up screen.
MB991502 (2) Select "System select."
(3) Choose "ABS" from the "CHASSIS" tab.
AC207179AB
(4) Select "Actuator Test" from "ABS" screen
(5) Choose an appropriate item for hydraulic unit check.
NOTE: The ABS system will switch to the scan tool mode and
the ABS warning light will illuminate.
NOTE: When the ABS has been interrupted by the fail-safe
16-PIN
function, scan tool MB991502 or MB991958 actuator testing
cannot be used.

MB991911

MB991824

MB991827 AC210056AC

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35B-116 ANTI-LOCK BRAKING SYSTEM (ABS)
ON-VEHICLE SERVICE

DEPRESSED
PEDAL
OPERATION SCAN TOOL ACTUATOR TEST
RELEASED (ITEM NO.01, 02, 03, 04) START

PRESSURE INCREASE
SOLENOID 2s
VALVE PRESSURE HOLD
POSITION
PRESSURE DECREASE 1s

LOCK
CHECKING
THE BRAKE
FORCE DRAG FORCE
WHEN THE 3s
PEDAL IS FREE

AC000954AB

7. Turn the wheel by hand and check the change in braking

force when the brake pedal is depressed. When using the
braking force tester, depress the brake pedal until the
braking force is at the following values, and check that the
braking force changes to the brake drag force inspected in
step 2 when the actuator is force-driven. The result should
be as shown in the diagram above.
Front wheel 785 − 981 N (176 − 220 lb.)
Rear wheel 588 − 784 N (132 − 176 lb.)

8. If the result of inspection is abnormal, repair according to the

Diagnosis Table below.

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 ANTI-LOCK BRAKING SYSTEM (ABS)
ON-VEHICLE SERVICE
35B-117

DIAGNOSIS TABLE
MUT-II/MUT-III DISPLAY OPERATION INSPECTION RESULT JUDGMENT PROBABLE CAUSE REMEDY

01 FR VALVE • Depress brake pedal Brake force is Normal − −

02 FL VALVE to lock wheel. released for
03 RR VALVE • Using scan tool three seconds
04 RL VALVE MB991502/ after wheels
MB991958, select the have been
wheel to be checked locked.
and force the actuator
Wheel does not Abnor Clogged brake Check and clean
to operate.
lock when brake mal line other than brake line
• Turn the selected
pedal is hydraulic unit
wheel manually to
depressed.
check the change of Clogged Replace
brake force. hydraulic circuit hydraulic unit
in hydraulic unit assembly
Brake force is Incorrect Connect correctly
not released hydraulic unit
brake tube
connection
Hydraulic unit Replace
solenoid valve hydraulic unit
not functioning assembly
correctly

9. After inspection, disconnect the scan tool MB991502/

MB991958 immediately after turning the ignition switch to
the "LOCK" (OFF) position.

IN THE EVENT OF A DISCHARGED BATTERY

M1352003500451

WARNING
If the ABS is not operating, the vehicle posture will be
unstable during braking, Do not drive the vehicle with
the ABS-ECU connector disconnected or with the
ABS not operating for any other reason.
If the engine is started using a booster cable when the battery
is completely flat, and the vehicle is then driven without waiting
for the battery to be recharged, the engine may misfire and it
may not be possible to drive the vehicle. This is because the
ABS consumes a large amount of current when carrying out its
initial checks. If this happens, recharge the battery fully.

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35B-118 ANTI-LOCK BRAKING SYSTEM (ABS)
HYDRAULIC UNIT

HYDRAULIC UNIT
REMOVAL AND INSTALLATION
M1352008600408
NOTE: The ABS-ECU is integrated in the hydraulic unit.
Pre-removal Operation Post-installation Operation
• Brake Fluid Draining • Brake Fluid Filling
• Bake Line Bleeding (Refer to P.35A-15.)
• Hydraulic Unit Check (Refer to P.35B-114.)

2
15 ± 2 N·m
12 ± 1 ft-lb
2 3

1
2

2
25 ± 6 N·m
19 ± 4 ft-lb

25 ± 6 N·m
19 ± 4 ft-lb

AC100173 AC

REMOVAL STEPS REMOVAL STEPS (Continued)

<<A>> 1. ABS-ECU HARNESS CONNECTOR <<B>> 3. BRAKE MODULATOR HYDRAULIC
>>A<< 2. BRAKE TUBE CONNECTION UNIT (HYDRAULIC UNIT AND ABS-
ECU)
4. BRAKE HYDRAULIC UNIT
BRACKET

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 ANTI-LOCK BRAKING SYSTEM (ABS)
HYDRAULIC UNIT
35B-119
REMOVAL SERVICE POINTS
.

<<A>> ABS-ECU HARNESS CONNECTOR DISCONNEC-

TION
Move the lock lever of the ABS-ECU connector as shown in the
illustration, and then disconnect the harness connector.

LOCK LEVER
AC211555AB

<<B>> BRAKE MODULATOR HYDRAULIC UNIT

(HYDRAULIC UNIT AND ABS-ECU) REMOVAL
WARNING
The hydraulic unit is heavy. Use care when removing
it.
CAUTION
• The hydraulic unit cannot be disassembled. Never
loosen its nuts or bolts.
• Do not drop or shock the hydraulic unit.
• Do not turn the hydraulic unit upside down or lay it on
its side.

INSTALLATION SERVICE POINT

.

>>A<< BRAKE TUBE CONNECTION

Connect the tubes to the hydraulic unit assembly as shown in
2 3 the illustration.
4
5 1. From the master cylinder (secondary)
2. To the front brake (LH)
1 3. To the rear brake (RH)
4. To the rear brake (LH)
5. To the front brake (RH)
6. From the master cylinder (primary)
6
AC100240AB

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35B-120 ANTI-LOCK BRAKING SYSTEM (ABS)
ABS SENSOR

ABS SENSOR
REMOVAL AND INSTALLATION
M1352020700016

Post-installation Operation
• ABS Sensor Output Voltage Measurement (Refer to
P.35B-112.)

3 4

<FRONT>

1
<REAR>

AC211696AB

FRONT ABS SENSOR REMOVAL REAR ABS SENSOR REMOVAL

STEPS STEPS
<<A>> 1. FRONT ABS SENSOR <<A>> >>A<< 3. REAR ABS SENSOR
2. FRONT ABS ROTOR (REFER TO 4. REAR ABS ROTOR (REFER TO
GROUP 26, DRIVE SHAFT GROUP 27B, DRIVE SHAFT
ASSEMBLY P.26-13.) ASSEMBLY P.27-21.)
NOTE: The ABS rotors are integrated with the drive
shaft and cannot be disassembled.

REMOVAL SERVICE POINT

.

<<A>> FRONT ABS SENSOR/REAR ABS SENSOR

REMOVAL
CAUTION
Be careful when handling the projection at the tip of the
ABS sensor and the toothed edge of the ABS rotor so as
not to damage them by contacting other parts.

<FRONT> <REAR>
AC100242 AB

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 ANTI-LOCK BRAKING SYSTEM (ABS)
ABS SENSOR
35B-121
INSTALLATION SERVICE POINT
.

>>A<< REAR ABS SENSOR INSTALLATION

Install the rear ABS sensor crossing with the parking brake
REAR ABS SENSOR
cable as shown.

PARKING BRAKE CABLE

AC211698AB

INSPECTION
M1352020800013

ABS SENSOR CHECK

1. Check whether any metallic foreign material has adhered to
the projection at the ABS sensor tip. Remove any foreign
material. Also check whether the pole piece is damaged.
Replace it with a new one if it is damaged.
NOTE: The projection can become magnetized due to the
magnet inside the ABS sensor, causing foreign material to
easily adhere to it. The projection may not be able to cor-
rectly sense the wheel rotation speed if foreign matter is on
it or if it is damaged.
2. Measure the resistance between the ABS sensor terminals.
Standard value: 1.24 − 1.64 kΩ
<FRONT> <REAR>
3. If the internal resistance of the ABS sensor is not within the
standard value, replace it with a new ABS sensor.

AC211699AB

4. Remove all connections from the speed sensor. The circuit

should be open between terminals (1) and (2) and the body
of the ABS sensor. If the circuit is not open, replace with a
new ABS sensor.
5. Check the ABS sensor cable for breakage, damage or
disconnection. Replace with a new one if a problem is found.
NOTE: When checking for cable damage, remove the cable
clamp part from the body and then gently bend and pull the
cable near the clamp.
ACX01120 AB

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35B-122 ANTI-LOCK BRAKING SYSTEM (ABS)
G-SENSOR

TOOTHED ABS ROTOR CHECK

Check whether the ABS rotor teeth are broken or deformed.
Replace the EBJ assembly of the driveshaft, respectively, if the
teeth are damaged or deformed.

AC000965

G-SENSOR
REMOVAL AND INSTALLATION
M1352010100206

CAUTION
Do not drop or apply a shock on the G-sensor.
Pre-removal and Post-installation Operation
• Rear Console Assembly Removal and Installation (Refer
to GROUP 52A, Rear Floor Console Assembly P.52A-8).

PARKING BRAKE LEVER

2
REAR OF THE VEHICLE Y2056AU

AC211700 AB

>>B<< 1. LATERAL G-SENSOR

>>A<< 2. LONGITUDINAL G-SENSOR

INSTALLATION SERVICE POINTS

.

>>A<< LONGITUDINAL G-SENSOR INSTALLATION

The arrow mark on the G-sensor must direct toward front of the
vehicle.
.

>>B<< LATERAL G-SENSOR INSTALLATION

The arrow mark on the G-sensor must direct toward the parking
brake lever.

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 ANTI-LOCK BRAKING SYSTEM (ABS)
G-SENSOR
35B-123
INSPECTION
M1352018000043

LATERAL/LONGITUDINAL G-SENSOR CHECK

Required Special Tool:
• MB991348: Test Harness Set
1. Disconnect the G-sensor connector and connect special tool
MB991348, between terminals of the disconnected
LABEL connector.
2. With the ignition switch turned to the "ON" position, read the
voltage between terminals number 2 and number 3.
MB991348
Standard Value: 2.4 − 2.6 V
3. With special tool MB991348 connected, rotate so that the
arrow faces straight down. Read output voltage between
terminals number 2 and number 3.
CONNECTOR: D-37/D-38 Standard Value: 3.4 − 3.6 V
(HARNESS SIDE)
4. If the voltage deviates from the standard value, make sure
that nothing is wrong with the power supply wire and ground
LABEL wire and then replace the G-sensor.

AC103662AG

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35B-124 ANTI-LOCK BRAKING SYSTEM (ABS)
STEERING ANGULAR VELOCITY SENSOR

STEERING ANGULAR VELOCITY SENSOR

REMOVAL AND INSTALLATION
M1352021000010

CAUTION
• Before removing the steering wheel and air bag module assembly, be sure to refer to GROUP 52B,
Service Precautions (P.52B-18) and Air Bag Module and Clock Spring (P.52B-184).
• Make sure no oil adheres to the steering angular velocity sensor because a photointerruptors are
mounted on the steering angular velocity sensor.
Pre-removal and Post-installation Operation
• Steering Wheel Removal and Installation (Refer to
GROUP 37, Steering Wheel P.37-23.)
• Column Cover, Clock Spring and Column Switch Assem-
bly Removal and Installation (Refer to GROUP 37, Steer-
ing Shaft P.37-25.)

STEERING ANGULAR
VELOCITY SENSOR

AC211701AB

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 ANTI-LOCK BRAKING SYSTEM (ABS)
SPECIFICATIONS
35B-125
SPECIFICATIONS
FASTENER TIGHTENING SPECIFICATIONS
M1352012400300

ITEM SPECIFICATION
Brake tube flare nut 15 ± 2 N⋅m (12 ± 1 ft-lb)
Hydraulic unit bracket bolt and nut 25 ± 6 N⋅m (19 ± 4 ft-lb)

GENERAL SPECIFICATIONS
M1352000200053

ITEM SPECIFICATION
ABS control method 4-sensor, 4-channel
No. of ABS rotor teeth Front 43
Rear 43
ABS sensor Type Magnet coil type
Gap between sensor Front 0.85 (0.033)
and rotor mm (in) <Non-adjustable type>
Rear 0.60 (0.023)
<Non-adjustable type>

SERVICE SPECIFICATION
M1352000300492

ITEM STANDARD VALUE

ABS sensor internal resistance kΩ 1.24 − 1.64

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NOTES