C1277

CIRCUIT DESCRIPTION
The PCM provides the EBTCM with information on engine torque output via a high speed, Pulse Width Modulated (PWM) signal on CKT 464.

The information enables the EBTCM to determine if engine torque management is required during a traction control event.

CONDITIONS FOR SETTING THE DTC
The DTC C1277 will set if the EBTCM determines that there is a signal/circuit malfunction in CKT 464.

ACTION TAKEN WITH THE DTC SETS
The following actions are taken when the DTC sets:
^ A malfunction DTC is stored
^ The TCS is disabled
^ The TRACTION OFF indicator lamp is turned ON

CONDITIONS FOR CLEARING THE DTC
The DTC will clear under following conditions:
^ Conditions for the malfunction are no longer present. Use the scan tool clear DTCs function.
^ 100 ignition switch key cycles have passed without detecting any malfunctions

DIAGNOSTIC AIDS
Perform a thorough inspection of the wiring and the connectors.

Failure to carefully inspect wiring may result in a misdiagnosis. A misdiagnosis may result in replacing parts without repairing the malfunction.

Thoroughly inspect the following grounds:
^ G101
^ G102
^ G106
^ G110

The following condition can cause DTC C1277 set:
^ An open in CKT 464.
^ A short to ground in CKT 464.
^ A short to voltage in CKT 464.
^ Damaged wiring or connections.
^ Poor terminal contact.

If no circuit problem caused the DTC, perform a road test and monitor CKT 464 at the PCM when the DTC sets.






DTC C1277 DELIVERED TORQUE SIGNAL CIRCUIT MALFUNCTION