POWER STEERING SYSTEM (for 2AR-FE), Diagnostic DTC:C1521, C1522, C1523, C1524, C1528, C1531, C1532, C1533, C1534, C1555
| DTC Code | DTC Name |
|---|---|
| C1521 | Motor Circuit Malfunction |
| C1522 | Motor Circuit Malfunction |
| C1523 | Motor Circuit Malfunction |
| C1524 | Motor Circuit Malfunction |
| C1528 | Motor Rotation Angle Sensor Malfunction |
| C1531 | ECU Malfunction |
| C1532 | ECU Malfunction |
| C1533 | ECU Malfunction |
| C1534 | ECU Malfunction |
| 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 |
INSPECTION PROCEDURE
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
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REPLACE POWER STEERING ECU ASSEMBLY
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Replace power steering ECU assembly Click here.
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