C1274

CIRCUIT DESCRIPTION
The Traction Control System (TCS) Prime valve solenoid circuits are supplied with battery power when the ignition is in the ON position. The Electronic Brake and Traction Control Module (EBTCM) controls the valve functions by grounding the circuit when necessary.

CONDITIONS FOR SETTING THE DTC
The Electronic Brake and Traction Control Module (EBTCM) senses a discrepancy such as an open, short to ground, or short to voltage in the circuit.

ACTION TAKEN WHEN THE DTC SETS
ABS/TCS/Active Handling (if equipped with RPO JL4) are disabled.
^ Indicators that turn on:
- ABS indicator
- Car Icon (TCS indicator)
^ Messages displayed on the Driver Information Center (DIC):
- Service ABS
- Service Traction System
- Service Active HNDLG (if equipped with Active Handling RPO JL4)

CONDITIONS FOR CLEARING THE DTC
^ Condition for Diagnostic Trouble Code (DTC) is no longer present and Scan tool clear DTC function is used.
^ Fifty ignition cycles have passed with no DTCs detected.

DIAGNOSTIC AIDS
Make sure the integrity of the connection between the Electronic Brake and Traction Control Module (EBTCM) and the Brake Pressure Modulator Valve (BPMV) is secure, tight, and free from corrosion.

TEST DESCRIPTION
The numbers below refer to step numbers on the diagnostic table.
3. Checks the resistance value of the solenoid.
4. Checks for a short to ground in the Brake Pressure Modulator Valve (BPMV).
7. Checks for an internal short to voltage.





DTC C1274 RF TCS PRIME VALVE MALFUNCTION