C1554

POWER STEERING: ELECTRONIC POWER STEERING SYSTEM: C1521,C1522,C1531-C1534,C1554,C1555: Motor Circuit Malfunction

DTC C1521 - Motor Circuit Malfunction

DTC C1522 - Motor Circuit Malfunction

DTC C1531 - ECU Malfunction

DTC C1532 - ECU Malfunction

DTC C1533 - ECU Malfunction

DTC C1534 - ECU Malfunction

DTC C1554 - Power Supply Relay Failure

DTC C1555 - Motor Relay Welding 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 are not output.
NOTICE: If replacing the power steering ECU assembly, initialize the rotation angle sensor value and calibrate the torque sensor zero point Programming and Relearning.

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