For a complete wiring diagram Refer to Section 8W.When Monitored:With ignition on. Battery voltage above 10 volts.Set Condition:The actual ASD state is not equal to the desired ASD state. One Trip Fault. Three good trips to turn off the MIL.Possible Causes(K51) ASD CONTROL CIRCUIT SHORTED TO BATTERY VOLTAGE(K51) ASD CONTROL CIRCUIT OPEN(K51) ASD CONTROL CIRCUIT SHORTED TO GROUNDTIPM PCMAlways perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).1. ASD OPERATIONIgnition on, engine not running.With a scan tool, actuate the ASD.Is the ASD operating?YesRefer to the INTERMITTENT CONDITION Diagnostic Procedure.Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)NoGo To 22. (K51) ASD CONTROL CIRCUIT SHORTED TO VOLTAGE

Stop the ASD actuation.Turn the ignition off.Disconnect the C3 PCM harness connector.Disconnect the C2 TIPM harness connector.Ignition on, engine not running.Measure the voltage on the (K51) ASD Control circuit at the C2 TIPM harness connector.Does the voltmeter indicate voltage present?YesGo To 3NoRepair the short to voltage in the (K51) ASD Control circuit.Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)3. (K51) ASD CONTROL CIRCUIT OPEN

Turn the ignition off.Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool #8815 to perform diagnosis.Measure the resistance of the (K51) ASD Control circuit from the TIPM harness connector to the appropriate terminals of special tool #8815.Is the resistance below 5.0 ohms?YesGo To 4NoRepair the open in the (K51) ASD Control circuit.Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)4. (K51) ASD CONTROL CIRCUIT SHORTED TO GROUND

Measure the resistance between ground and the (K51) ASD Control circuit at the C2 TIPM harness connector.Is the resistance below 100 ohms?YesRepair the short to ground in the (K51) ASD Control circuit.Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)NoGo To 55. ASD CONTROL OPERATION FROM THE PCM

Connect the C3 PCM harness connector.Ignition on, engine not running.Using the scan tool in the PCM, actuate the ASD.With a 12-volt test light connected to ground, probe the (K51) ASD Control circuit in the C2 TIPM harness connector.Does the test light illuminate brightly and flash on and off?YesBefore continuing, check the TIPM harness connector terminals for corrosion, damage, or terminal push out. Repair as necessary.If OK, replace the TIPM in accordance with the Service Information.NoGo To 66. PCMBefore continuing, check the PCM 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 there any problems found?YesRepair as necessary.Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)NoReplace and program the Powertrain Control Module per Service Information.Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)