C1523

POWER STEERING: POWER STEERING SYSTEM: C1521-C1524, C1532, C1555: Motor Circuit Malfunction


DESCRIPTION

The power steering ECU supplies current to the power steering motor through this circuit.





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK CONNECTORS

(a) Check the connection of the power steering ECU and rack and pinion power steering gear connectors.

(b) Visually inspect the terminals of the power steering ECU and rack and pinion power steering gear connectors.

Result:





B -- CONNECT CONNECTORS CORRECTLY

C -- REPLACE POWER STEERING ECU Removal

D -- REPLACE POWER STEERING GEAR ASSEMBLY (w/ VGRS) Removal

E -- REPLACE POWER STEERING GEAR ASSEMBLY (w/o VGRS) Removal
A -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (POWER STEERING ECU - POWER STEERING MOTOR)

(a) Disconnect the C1 ECU connector.





(b) Disconnect the C3 motor connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

3. INSPECT POWER STEERING GEAR ASSEMBLY (POWER STEERING MOTOR)

(a) Measure the resistance according to the value(s) in the table below.





Standard resistance:





NOTICE:
- If replacing the power steering gear assembly, clear the rotation angle sensor value calibration value, initialize the rotation angle sensor value, and calibrate the torque sensor zero point Power Steering System.
- If replacing the power steering ECU, initialize the rotation angle sensor value and calibrate the torque sensor zero point Power Steering System.

Result:





B -- REPLACE POWER STEERING GEAR ASSEMBLY (w/ VGRS) Removal

C -- REPLACE POWER STEERING GEAR ASSEMBLY (w/o VGRS) Removal

A -- REPLACE POWER STEERING ECU Removal