C1214

CIRCUIT DESCRIPTION
The Electronic Brake Control Module/Electronic Brake Traction Control Module (EBCM/EBTCM) and the Brake Pressure Modulator Valve (BPMV) receive power from three circuits. CKT 642 supplies battery power to the pump motor. CKT 342 supplies ignition power to the solenoid valves, the EBCM/EBTCM, and the pump motor relay coil. CKT 641 supplies battery power to initialize controller operations. CKT 641 also supplies power to the solenoid valve relay coil.

CONDITIONS FOR SETTING THE DTC
The solenoid relay is commanded on and the solenoid relay voltage is less than 8.0 volts, and ignition voltage is greater than 10.5 volts

ACTION TAKEN WHEN THE DTC SETS
^ A DTC C1214 is stored
^ The ABS/TCS is disabled
^ The ABS and the TRACTION OFF indicators turn on

CONDITIONS FOR CLEARING THE DTC
^ The condition for the Diagnostic Trouble Code (DTC) is no longer present and the scan tool Clear DTC function is used
^ 50 ignition cycles have passed with no DTC(s) detected

DIAGNOSTIC AIDS
^ Thoroughly inspect the wiring and the connectors. Failure to carefully and fully inspect the wiring and the connectors can result in misdiagnosis. Misdiagnosis may cause replacement of parts without repairing the malfunction.
^ The following conditions are possible causes of the malfunction:
- A problem in the power distribution system may result in no batted, voltage to CKT 342
- The ABS SOLENOID fuse is open
- CKT 342 has a wiring problem, corrosion, or faulty connections
- There is an internal malfunction in the EBCM/EBTCM or the BPMV
- The solenoid valve relay is faulty
- The relays are integral to the EBCM/EBTCM and are not serviceable
^ If an intermittent malfunction exists, refer to Troubleshooting Procedures.

TEST DESCRIPTION
The numbers below refer to the step numbers on the diagnostic table.
4. This step checks for a short to ground in CKT 342.
5. This step checks for an internal short in the BPMV.
8. This step checks for an open in CKT 342.