C1272

DTC C1272 LF TCS Prime Valve Malfunction:

Prime Valve Schematic:

CIRCUIT DESCRIPTION
The TCS prime valve solenoid circuit is supplied with battery power when the ignition is in the "RUN" position. The EBTCM controls the valve by grounding the circuit when necessary.

CONDITION FOR SETTING THE DTC
- The EBTCM senses a discrepancy such as an open, short to ground, or short to voltage in the circuit.

ACTION TAKEN WHEN THE DTC SETS
- A malfunction DTC is stored, ABS/TCS is disabled and the "ABS" and "TRACTION OFF" indicator lamps are turned "ON."

CONDITIONS FOR CLEARING DTC
- Condition for DTC is no longer present and scan tool clear DTC function is used.
- 50 ignition cycles have passed with no DTC(s) detected.

DIAGNOSTIC AIDS
- It is very important that a thorough inspection of the wiring and connectors be performed. Failure to carefully and fully inspect wiring and connectors may result in misdiagnosis, causing part replacement with reappearance of the malfunction.

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 BPMV.
7. Checks for an internal short to voltage.