C1521

POWER ASSIST SYSTEMS: POWER STEERING SYSTEM (for Brushless Type Motor): C1521, C1531-C1534: Motor Circuit Malfunction
C1534 - ECU Malfunction

DESCRIPTION

If the power steering ECU assembly detects 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, perform rotation angle sensor initialization and torque sensor zero point calibration Power Steering System (For Brushless Type Motor).

PROCEDURE

1. CHECK FOR DTC

(a) Clear the DTCs Power Steering System (For Brushless Type Motor).

(b) Check for DTCs. Power Steering System (For Brushless Type Motor)

OK:

DTC is not output.

NG -- REPLACE POWER STEERING ECU ASSEMBLY Removal

OK -- CHECK INTERMITTENT PROBLEMS