DTC    C1521    Motor Circuit Malfunction

DTC    C1531    ECU Malfunction

DTC    C1532    ECU Malfunction

DTC    C1533    ECU Malfunction

DTC    C1534    ECU Malfunction

for Preparation Click here


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.

DTC No.
DTC Detection Condition
Trouble Area
C1521
Motor overcurrent
Power steering ECU assembly
C1531
ECU internal malfunction (CPU malfunction)
C1532
ECU internal malfunction (Peripheral circuit malfunction)
C1533
ECU internal malfunction (Substrate temperature sensor malfunction)
C1534
ECU internal malfunction (EEPROM error)

INSPECTION PROCEDURE

NOTICE:
If the steering column assembly or power steering ECU assembly has been replaced, perform rotation angle sensor value initialization and torque sensor zero point calibration (Click here).

1.CHECK FOR DTC

  1. Clear the DTCs (Click here).

  1. Check for DTCs (Click here).


Result:

Result
Proceed to
DTCs (except C1521,C1531,C1532,C1533,C1534 DTC) are not output
A
DTCs (except C1521,C1531,C1532,C1533,C1534 DTC) are output
B



B
REPAIR CIRCUITS INDICATED BY OUTPUT DTCS (Click here)
A

REPLACE POWER STEERING ECU ASSEMBLY (Click here)