C1521

POWER ASSIST SYSTEMS: POWER STEERING SYSTEM: C1521, C1531-C1534: Motor Circuit Malfunction
C1534 - ECU Malfunction

DESCRIPTION

If the power steering ECU assembly stores these DTCs, it will shut off the motor relay circuit (built into the power steering ECU assembly) and stop power assist. However, power assist continues if DTC C1533 or C1534 is output.





INSPECTION PROCEDURE

NOTICE:
If the power steering ECU assembly has been replaced with a new one, perform assist map writing and rotation angle sensor value initialization torque sensor zero point calibration after performing the initialization of the torque sensor zero point value Programming and Relearning.

PROCEDURE

1. CHECK FOR DTC

(a) Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.

(b) Check for DTCs Reading and Clearing Diagnostic Trouble Codes.

Result:





B -- REPAIR CIRCUITS INDICATED BY OUTPUT DTCS Power Steering System

A -- REPLACE POWER STEERING ECU ASSEMBLY Removal