Dtc C1201/51 Engine Control System Malfunction
Brake. Lexus Is250, Is220D. Gse20 Ale20
DESCRIPTION
INSPECTION PROCEDURE
CHECK ENGINE CONTROL SYSTEM
RECONFIRM DTC
REPLACE ECM
RECONFIRM DTC
DTC C1201/51 Engine Control System Malfunction |
DESCRIPTION
If a malfunction in the engine control system is detected, the operations of VSC and TRC 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.DTC No.
| DTC Detection Condition
| Trouble Area
|
C1201/51
| Engine control system malfunction signal continues for 5 seconds.
| Engine control system
|
INSPECTION PROCEDURE
- NOTICE:
- When replacing the brake actuator assembly, perform zero point calibration (Click here).
1.CHECK ENGINE CONTROL SYSTEM |
Check if the engine control system DTC is output (Click here).
- Result:
Condition
| Proceed to
|
DTC is not output
| A
|
DTC is output
| B
|
| INSPECT ENGINE CONTROL SYSTEM |
|
|
Clear the DTC (Click here).
Perform a road test.
Check if the same DTC is recorded (Click here).
- Result:
Condition
| Proceed to
|
DTC (C1201/51) is output
| A
|
DTC (C1201/51) is not output
| B
|
| USE SIMULATION METHOD TO CHECK |
|
|
Turn the engine switch off.
Replace the ECM (Click here).
Clear the DTC (Click here).
Perform a road test.
Check if the same DTC is recorded (Click here).
- Result:
Condition
| Proceed to
|
DTC (C1201/51) is output
| A
|
DTC (C1201/51) is not output
| B
|
A |
|
|
|
REPLACE BRAKE ACTUATOR ASSEMBLY |
|