C1201

BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: C1201/51: Engine Control System Malfunction

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.





INSPECTION PROCEDURE

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (MOMENTARY INTERRUPTION)
(a) Using Techstream, check for any momentary interruption in the wire harness and connector corresponding to a DTC Check for Intermittent Problems.

DATA LIST: ABS / VSC / TRAC





OK:
There are no momentary interruptions.

HINT: Perform the above inspection before removing the sensor and connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM TO SKID CONTROL ECU)
OK -- Continue to next step.

2. CHECK DTC FOR ENGINE CONTROL SYSTEM
(a) Clear the DTC (engine control system).
(b) Check the DTC (engine control system).
Result:





B -- REPAIR ENGINE CONTROL SYSTEM ACCORDING TO DTC OUTPUT
A -- REPLACE ECM
3. REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM TO SKID CONTROL ECU)
NEXT -- Continue to next step.

4. RECONFIRM DTC
(a) Clear the DTC.
(b) Perform a road test.
(c) Check that the same DTC is recorded.
Result:





B -- CHECK DTC FOR ENGINE CONTROL SYSTEM
A -- END