For a complete wiring diagram Refer to Section 8W.When Monitored:With the ignition on. Battery voltage greater than 10 volts. A/C Switch on.Set Condition:A shorted high condition has been detected in the A/C Clutch Control output circuit by the TIPM. One Trip Fault. Three good trips to turn off the MIL.Possible Causes(C3) A/C CLUTCH CONTROL OUTPUT CIRCUIT SHORTED TO BATTERY VOLTAGEEXCESSIVE RESISTANCE IN THE (Z906) A/C CLUTCH GROUND CIRCUITA/C COMPRESSOR CLUTCHTIPMAlways perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).1. A/C CLUTCH OPERATIONIgnition on, engine not running.With a scan tool under the PCM Actuators, actuate the A/C Clutch.Is the A/C Clutch actuating?YesRefer to the INTERMITTENT CONDITION Diagnostic Procedure.Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)NoGo To 22. A/C CLUTCH CONTROL OPERATION FROM THE PCM

Turn the ignition off.Disconnect the C1 TIPM harness connector.Ignition on, engine not running.Using the scan tool under the PCM Actuators, actuate the A/C Clutch.With a 12-volt test light connected to ground, probe the (C13) A/C Clutch Control circuit in the C1 TIPM harness connector.Does the test light illuminate brightly and flash on and off?YesGo To 3NoPerform the Diagnostic Procedure for P0645-A/C CLUTCH CONTROL CIRCUIT. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING) 3. (C3) A/C CLUTCH CONTROL OUTPUT CIRCUIT SHORTED TO BATTERY VOLTAGE

Turn the ignition off.Disconnect the A/C Compressor Clutch harness connector.Ignition on, engine not running.Measure the voltage on the (C3) A/C Clutch Control Output circuit at the A/C Compressor Clutch harness connector.Is any voltage present?YesRepair the short to battery voltage in the (C3) A/C Clutch Control Output circuit.Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) NoGo To 44. A/C CLUTCH GROUND CIRCUIT OPEN

Turn the ignition off.Connect the C1 TIPM harness connector.Using a 12-volt test light connected to 12-volts, probe the (Z906) A/C Clutch ground circuit at the A/C Compressor Clutch harness connector.Does the test light illuminate brightly?YesGo To 5NoRepair the excessive resistance in the (Z906) A/C Clutch ground circuit. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) 5. A/C COMPRESSOR CLUTCH

Ignition on, engine not running.Using the scan tool under the TIPM Actuators, actuate the A/C Clutch.With a 12-volt test light connected to ground, probe the (C3) A/C Clutch Control Output circuit at the A/C Compressor Clutch harness connector.Does the test light illuminate brightly and flash on and off?YesReplace the A/C Compressor Clutch per Service Information.Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) NoGo To 6 6. TOTALLY INTEGRATED POWER MODULEBefore continuing, check the TIPM harness connector terminals for corrosion, damage, or terminal push out. Repair as necessary.Using the schematics as a guide, inspect the wire harness and connectors. Pay particular attention to all Power and Ground circuits.Were any problems found?YesRepair as necessary.Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) NoReplace the Totally Integrated Power Module per Service Information.Perform the BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)