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• When Monitored: • Set Condition: Possible Causes (T312) REAR DIFFERENTIAL SOLENOID CONTROL CIRCUIT SHORTED TO GROUND (T312) REAR DIFFERENTIAL SOLENOID CONTROL CIRCUIT OPEN (T78) SOLENOID SUPPLY VOLTAGE OPEN (T78) SOLENOID SUPPLY VOLTAGE SHORTED TO GROUND ALL WHEEL DRIVE (AWD) CONTROL MODULE ELECTRONIC CONTROLLED CLUTCH (ECC) Diagnostic Test 1. ACTIVE DTC Ignition on, engine not running. With the scan tool, read DTCs. Is the DTC active at this time? Yes >> Go To 2 No >> Go To 9 2. ECC SOLENOID OPERATION Turn the ignition off. Disconnect the ECC Solenoid harness connector. Ignition on, engine not running. Using a 12-volt test light, jump across from the (T78) Solenoid Supply With the scan tool, actuate the ECC Solenoid. Does the test light illuminate brightly and flash on and off? Yes >> Go To 8 No >> Go To 3 PM CLUTCH-ELECTRONICALLY CONTROLLED-ELECTRICAL DIAGNOSTICS 3 - 91 |