DTC C1201/51 Engine Control System Malfunction: Description
If a malfunction in the engine control system is detected, the operations of VSC and TRAC are prohibited by the fail safe function. When the signals from the engine are input normally, the fail safe is cancelled and the DTC is not stored.
DIAGNOSIS TROUBLE CODE CHART
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| C1201/51 | Engine control system malfunction signal continues for 5 seconds. | Engine control system |
NOTE:
When replacing the skid control ECU, perform zero point calibration (See CALIBRATION
).
- CHECK ENGINE CONTROL SYSTEM
- Check if the engine control system DTC is output (See DTC CHECK / CLEAR
).
Result
CONDITION CHARTCondition Proceed to DTC is not output A DTC is output B
B : INSPECT ENGINE CONTROL SYSTEM
A : GO TO NEXT STEP
- Check if the engine control system DTC is output (See DTC CHECK / CLEAR
).
- RECONFIRM DTC
- Clear the DTC (See DTC CHECK / CLEAR ).
- Perform a road test.
- Check if the same DTC is recorded (See DTC CHECK / CLEAR
).
Result
CONDITION CHARTCondition Proceed to DTC (C1201/51) is output A DTC (C1201/51) is not output B
B : USE SIMULATION METHOD TO CHECK
A : GO TO NEXT STEP
- REPLACE ECM
- Turn the engine switch off.
- Replace the ECM (See INSTALLATION ).
NEXT
- RECONFIRM DTC
- Clear the DTC (See DTC CHECK / CLEAR ).
- Perform a road test.
- Check if the same DTC is recorded (See DTC CHECK / CLEAR
).
Result
CONDITION CHARTCondition Proceed to DTC (C1201/51) is output A DTC (C1201/51) is not output B
B : END
A : REPLACE SKID CONTROL ECU