Dtc C1531/25 Ecu Malfunction

Steering. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35
Power Steering. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35

DESCRIPTION

INSPECTION PROCEDURE

RECONFIRM DTC

DTC C1531/25 ECU Malfunction

DTC C1532/25 ECU Malfunction

DTC C1533/25 Temperature Sensor Circuit is Low or High

DTC C1534/25 EEPROM Malfunction


DESCRIPTION

If the power steering ECU detects these DTCs, it will shut off the motor relay circuit (built into the power steering ECU) and stop power assist. However, power assist continues if DTC C1533 is output.

DTC No.
DTC Detection Condition
Trouble Area
C1531/25
ECU internal malfunction (CPU malfunction)
Power steering ECU
C1532/25
ECU internal malfunction (Peripheral circuit malfunction)
Power steering ECU
C1533/25
ECU internal malfunction (Substrate temperature sensor malfunction)
Power steering ECU
C1534/25
ECU internal malfunction (EEPROM error)
Power steering ECU

INSPECTION PROCEDURE

1.RECONFIRM DTC

  1. Check for DTC.

    OK:
    DTC is not output.


OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
NG

REPLACE POWER STEERING ECU