C1531

POWER STEERING: ELECTRONIC POWER STEERING SYSTEM: C1531: ECU Malfunction

DTC C1531 - ECU Malfunction

DTC C1533 - ECU Malfunction

DTC C1534 - ECU Malfunction

DTC C1554 - Power Supply Relay Failure

DESCRIPTION

If the power steering ECU assembly detects these DTCs, it will shut off the motor current sensor, power source relay, motor relay circuit (built into the power steering ECU assembly) and stop power assistance. However , power assistance will continue if DTC C1533 or C1534 is output.






INSPECTION PROCEDURE

PROCEDURE

1. RECONFIRM DTC
(a) Check for DTCs Reading and Clearing Diagnostic Trouble Codes.
OK:
DTCs other than C1531, C1533, C1534 and C1554 are not output.
NOTE: If replacing the power steering ECU assembly, initialize the rotation angle sensor value and calibrate the torque sensor zero point Electronic Power Steering System.

NG -- REPLACE POWER STEERING ECU ASSEMBLY
OK -- USE SIMULATION METHOD TO CHECK