POWER STEERING SYSTEM, Diagnostic DTC:C1521/25,C1531/25,C1532/25,C1533/25 and C1534/25
| DTC Code | DTC Name |
|---|---|
| C1521/25 | Short in Motor Circuit |
| C1531/25 | ECU Malfunction |
| C1532/25 | ECU Malfunction |
| C1533/25 | Temperature Sensor Circuit is Low or High |
| C1534/25 | EEPROM Malfunction |
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 C1533/25 or C1534/25 is output.
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
Warning Indicate |
Return-to-normal Condition |
|---|---|---|---|---|---|
C1521/25 |
Short in Motor Circuit |
Motor overcurrent |
Power steering ECU assembly |
On |
Ignition switch ON again |
C1531/25 |
ECU Malfunction |
ECU internal malfunction (CPU malfunction) |
Power steering ECU assembly |
On |
Ignition switch ON again |
C1532/25 |
ECU Malfunction |
ECU internal malfunction (Peripheral circuit malfunction) |
Power steering ECU assembly |
On |
Ignition switch ON again |
C1533/25 |
Temperature Sensor Circuit is Low or High |
ECU internal malfunction (Substrate temperature sensor malfunction) |
Power steering ECU assembly |
Off |
After normal judgment |
C1534/25 |
EEPROM Malfunction |
ECU internal malfunction (EEPROM error) |
Power steering ECU assembly |
Torque and motor rotation angle sensor adjustment is set to the default value and control is continued. In this case, the warning light illuminates. |
After normal judgment |
CAUTION / NOTICE / HINT
If the power steering ECU assembly has been replaced, perform assist map writing (Click here).
PROCEDURE
CHECK FOR DTC
Clear the DTCs.
Chassis > EMPS > Clear DTCs
Check for DTCs.
Chassis > EMPS > Trouble Codes
Result
Result
Proceed to
DTCs (except C1521/25, C1531/25, C1532/25, C1533/25 and C1534/25 DTC) are not output.
A
DTCs (except C1521/25, C1531/25, C1532/25, C1533/25 and C1534/25 DTC) are output.
B