C1273

DTC C1273 Schematic:

CIRCUIT DESCRIPTION
The Master Cylinder Isolation valve solenoid circuits are supplied with battery power when the ignition is in the ON position. The EBTCM controls the valve functions by grounding the circuit when necessary.

CONDITIONS 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 Control Indicators are turned ON.

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

DIAGNOSTIC AIDS
^ Make sure the integrity of the connection between the EBTCM and the BPMV is secure, tight, and free from corrosion.

DTC C1273: TCS Master Cylinder Isolation Valve Malf:

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.