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 canceled and the DTC is not stored.






INSPECTION PROCEDURE

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (MOMENTARY INTERRUPTION)
(a) Using the Data List of Techstream, check for any momentary interruption in the wire harness corresponding to the DTC .

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 AND CONNECTOR (ECM - 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 -- REPLACE ECM
A -- REPAIR ENGINE CONTROL SYSTEM
3. REPAIR OR REPLACE HARNESS AND CONNECTOR (ECM - SKID CONTROL ECU)
NEXT -- Continue to next step.
4. RECONFIRM DTC
(a) Clear the DTC .
(b) Perform a road test.
(c) Check if the same DTC is recorded .

Result





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