ABS - Integrated Chassis Control

DTC C1214: Solenoid Valve Relay Contact Or Coil Circuit Open (Part 1 Of 2):

DTC C1214: Solenoid Valve Relay Contact Or Coil Circuit Open (Part 2 Of 2):

DTC C1214 Schematic:

CIRCUIT DESCRIPTION
The valve relay supplies power to the valve solenoids in the BPMV. The valve relay, located in the EBTCM, is activated whenever the ignition switch is in the RUN position and no faults are present. Power is provided to the valves through the relay from CKT 1042 going into terminal D of the EBTCM. The valve relay remains engaged until the ignition is turned OFF or a failure is detected.

CONDITION FOR SETTING THE DTC
DTC C1214 will set anytime the solenoid relay is commanded ON and the solenoid relay voltage is less than 8 volts, and ignition voltage is greater than 10.5 volts.

ACTION TAKEN WHEN THE DTC SETS
A malfunction DTC is stored, ABS/TCS/ICCS is disabled and the ABS and TRACTION CONTROL indicator lamps are turned ON. Vehicles with ICCS2 will display the STABILITY REDUCED message on the DIC.

CONDITIONS FOR CLEARING THE DTC
Condition for DTC is no longer present and scan tool clear DTC function is used. Fifty start cycles have passed with no DTCs 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. A problem in the Power Distribution system may result in no battery voltage to CKT 1042. Fuse (50 A Maxifuse 5) is open. CKT 1042 has a wiring problem, terminal corrosion, or poor connections. There is an internal malfunction in the EBTCM or the BPMV. The Relays are integral to the EBTCM and are not serviceable.

TEST DESCRIPTION
The numbers below refer to step numbers on the diagnostic table.
4. Checks for a short to ground in CKT 1042.
5. Checks for an internal short in the BPMV.
8. Checks for an open in CKT 1042.