POWER STEERING SYSTEM, Diagnostic DTC:C1521,C1531,C1532,C1533 and C1534

DTC Code DTC Name
C1521 Motor Circuit Malfunction
C1531 ECU Malfunction
C1532 ECU Malfunction
C1533 ECU Malfunction
C1534 ECU Malfunction

DESCRIPTION

If the power steering ECU stores these DTCs, it will shut off the power supply relay circuit (built into the power steering ECU) and stop power assist. However, power assist continues if DTC C1533 or C1534 is stored.

DTC Code

DTC Detection Condition

Trouble Area

C1521

Motor overcurrent.

Power steering ECU assembly

C1531

An ECU internal malfunction (CPU malfunction).

C1532

An ECU internal malfunction (peripheral circuit malfunction).

C1533

An ECU internal malfunction (substrate temperature sensor malfunction).

C1534

An ECU internal malfunction (EEPROM error).

CAUTION / NOTICE / HINT

Note:

If the power steering ECU assembly is replaced, perform the assist map writing (Click here).

PROCEDURE

  1. CHECK FOR DTC

    1. Clear the DTC(s) (Click here).

    2. Check for DTCs (Click here).

      Table 1. Result

      Result

      Proceed to

      DTC is not output.

      A

      DTC is output.

      B

    USE SIMULATION METHOD TO CHECK

    (Click here)

    REPLACE POWER STEERING ECU ASSEMBLY

    (Click here)