C1531

POWER ASSIST SYSTEMS: POWER STEERING SYSTEM (for 2ZR-FE): C1531-C1535: ECU Malfunction
C1535 - ECU Malfunction

DESCRIPTION

The fail-safe function operates to stop power assist when DTCs indicating ECU malfunctions are stored. However, the power assist operation continues when DTC C1533 or C1534 is stored because it indicates an EEPROM error in the ECU.





INSPECTION PROCEDURE

NOTICE:
If the power steering ECU has been replaced with a new one, perform the assist map writing and the torque sensor zero point calibration Programming and Relearning.

PROCEDURE

1. CHECK FOR DTC

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

OK:

DTCs other than C1531, C1532, C1533, C1534 and C1535 are not output.

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

OK -- REPLACE POWER STEERING ECU Removal