POWER STEERING SYSTEM, Diagnostic DTC:C1521, C1522, C1523, C1524, C1528, C1531, C1532, C1533, C1534, C1555
| DTC Code | DTC Name |
|---|---|
| C1521 | Short in Motor Circuit |
| C1522 | Power Supply Sensor |
| C1523 | Current Deviation Excessive |
| C1524 | Motor Terminal Voltage |
| C1528 | Motor Rotation Angle Sensor |
| C1531 | ECU Malfunction |
| C1532 | ECU Malfunction |
| C1533 | Temperature Sensor Circuit is Low or High |
| C1534 | EEPROM |
| C1555 | Motor Relay Welding Failure |
DESCRIPTION
The power steering ECU assembly detects steering force using the signal received from the steering torque sensor, and also monitors the motor circuit for errors.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| C1521 | Motor overcurrent | Power steering ECU assembly |
| C1522 | Motor current sensor malfunction | |
| C1523 | Excessively large current deviation | |
| C1524 | Short (or open) in motor circuit or abnormal voltage or current in motor circuit | |
| C1528 | Motor rotation angle sensor malfunction | |
| 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) |
|
| C1555 | Motor relay circuit malfunction |
CAUTION / NOTICE / HINT
Note
If the power steering ECU assembly has been replaced with a new one, perform assist map writing and torque sensor zero point calibration Click here.
PROCEDURE
-
REPLACE POWER STEERING ECU ASSEMBLY
-
Replace the power steering ECU assembly (See page for manual tilt and manual telescopic steering column, or Click here for power tilt and power telescopic steering column).
NEXT 
END
-