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Electronic Power Steering DTC Guide

The document describes diagnostic trouble codes (DTCs) C1523 and C1524 related to the electronic power steering system motor circuit. It provides the inspection procedure to diagnose these codes, which involves checking the resistance of the harness and connectors between the power steering ECU assembly and motor, and inspecting the power steering link assembly that contains the motor. If any checks fail, the appropriate harness, connector, or assembly should be repaired or replaced. Calibration procedures are also noted if replacing the link assembly or ECU assembly.

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4K views3 pages

Electronic Power Steering DTC Guide

The document describes diagnostic trouble codes (DTCs) C1523 and C1524 related to the electronic power steering system motor circuit. It provides the inspection procedure to diagnose these codes, which involves checking the resistance of the harness and connectors between the power steering ECU assembly and motor, and inspecting the power steering link assembly that contains the motor. If any checks fail, the appropriate harness, connector, or assembly should be repaired or replaced. Calibration procedures are also noted if replacing the link assembly or ECU assembly.

Uploaded by

diemngan
Copyright
© Attribution Non-Commercial (BY-NC)
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PDF, TXT or read online on Scribd
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POWER STEERING ELECTRONIC POWER STEERING SYSTEM

PS39

DTC DTC
DESCRIPTION

C1523 C1524

Motor Circuit Malfunction Motor Circuit Malfunction

The power steering ECU assembly supplies current to the power steering motor through this circuit.
DTC No. DTC Detection Item Trouble Area Wire harness Power steering motor (built into power steering link assembly) Power steering ECU assembly Wire harness Power steering motor (built into power steering link assembly) Power steering ECU assembly

C1523

Excessively large current deviation

C1524

Voltage error between motor terminals

WIRING DIAGRAM

Power Steering Motor (Shielded) 2 A69 3 A69 1 A69 1 A68 2 A68 3 A68

Power Steering ECU Assembly

C1

PS
B124179E02

PS40

POWER STEERING ELECTRONIC POWER STEERING SYSTEM

INSPECTION PROCEDURE

CHECK HARNESS AND CONNECTOR (POWER STEERING ECU ASSEMBLY - POWER STEERING MOTOR) (a) Disconnect the A68 connector from the power steering ECU assembly. (b) Disconnect the A69 connector from the power steering motor. (c) Measure the resistance according to the value(s) in the table below. Standard resistance
Tester Connection A68-1 (V) - A69-2 (V) A68-2 (U) - A69-3 (U) Condition Always Always Always Always Always Always Specified Condition Below 1 Below 1 Below 1 10 k or higher 10 k or higher 10 k or higher

Wire Harness Side Connector Front View: A69 Power Steering Motor W V U

A68 Power Steering ECU Assembly

A68-3 (W) - A69-1 (W) A68-1 (V) - Body ground A68-2 (U) - Body ground

V U

A68-3 (W) - Body ground

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

W
C116653E03

OK

INSPECT POWER STEERING LINK ASSEMBLY (POWER STEERING MOTOR) (a) Measure the resistance according to the value(s) in the table below. Standard resistance
Tester Connection A69-3 (U) - A69-2 (V) A69-2 (V) - A69-1 (W) A69-1 (W) - A69-3 (U) Condition Always Always Always Always Always Always Specified Condition Below 1 Below 1 Below 1 10 k or higher 10 k or higher 10 k or higher

Power Steering Motor: V W

U
C116649E01

A69-3 (U) - Motor body A69-2 (V) - Motor body A69-1 (W) - Motor body

PS

NOTICE: If replacing the power steering link assembly, clear the rotation angle sensor calibration value, initialize the rotation angle sensor, and calibrate the torque sensor zero point (See page PS-13). If replacing the power steering ECU assembly, initialize the rotation angle sensor value and calibrate the torque sensor zero point (See page PS-13).

POWER STEERING ELECTRONIC POWER STEERING SYSTEM

PS41

NG OK

REPLACE POWER STEERING LINK ASSEMBLY (See page PS-58)

REPLACE POWER STEERING ECU ASSEMBLY (See page PS-68)

PS

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