For a complete wiring diagram Refer to Section 8WWhen the ignition switch is turned off (ignition power removed from ECM) the ECM continues to drive the ECM/ASD relay on for approximately 20–40 seconds. This period of time is the After-Run Mode of operation. During After-Run the ECM performs several internal and external checks. When After-Run is complete, the ECM switches off the ECM/ASD relay driver and powers off the engine system.When Monitored:When the ignition is turned off, during AFTER-RUN mode of operation.Set Condition:The internal ECM timer determines that the ASD Relay remained on for 2.0 seconds once AFTER-RUN mode of operation has been completed.Possible CausesCHECK FOR OTHER DTCSINTERMITTENT CONDITIONSUBSTITUTE ASD RELAY(K51) ASD RELAY CONTROL CIRCUIT SHORTED TO GROUND INTERMITTENTLYASD RELAY OUTPUT CIRCUIT SHORTED TO VOLTAGEENGINE CONTROL MODULEAlways perform the Pre-Diagnostic Troubleshooting procedure before proceeding.(Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)1. CHECK FOR OTHER DTCSTurn the ignition on.With the scan tool, check for additional DTCs.Are other DTCs present?YesRefer to the Symptom List for diagnosis of the other DTCs before continuing.Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - STANDARD PROCEDURE)NoGo To22. CLEAR CODE AND CHECK IF THE DTC RESETSPerform several ignition key cycles, pausing for at least 40 seconds between each cycle.Turn the ignition on.With the scan tool, read ECM DTCs.Did this DTC set again?YesGo To 3NoRefer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure.(Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)3. ASD RELAYTurn the ignition off.Install a known good relay in place of the ASD Relay.Turn the ignition on.With the scan tool, erase DTCs.Perform several ignition key cycles, pausing for at least 40 seconds between each cycle.Turn the ignition on.With the scan tool, read ECM DTCs.Did this DTC set again?YesGo To 4NoReplace the ASD Relay.Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - STANDARD PROCEDURE)4. (K51) ASD RELAY CONTROL CIRCUIT SHORTED TO GROUND INTERMITTENTLY

Turn the ignition off.Remove the ASD Relay from the TIPM.Disconnect the ECM harness connectors.Measure the resistance between ground and the (K51) ASD Relay Control circuit while wiggling the wiring harness and connectors.Was the resistance below 1000 ohms at any time while wiggling the wiring harness and connectors?YesRepair the (K51) ASD Relay Control circuit for an intermittent short to ground.Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - STANDARD PROCEDURE)NoGo To 55. ASD RELAY OUTPUT CIRCUIT SHORTED TO VOLTAGETurn the ignition on.Measure the voltage of the ASD Relay Output circuit.Is the voltage below 1.00 volt?YesGo To 6NoRepair the ASD Relay Output circuit for a short to voltage.Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - STANDARD PROCEDURE)6. CHECK THE ECM POWER AND GROUND CIRCUITSTurn the ignition off.Install the ASD relay.Refer to symptom CHECKING THE ECM POWER AND GROUNDS and verify proper Ignition, Battery and Ground circuits at the ECM.Were any problem found with the ECM Ignition, Battery or Ground circuits?YesRepair or replace as necessary.Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - STANDARD PROCEDURE)NoReplace and program the Engine Control Module in accordance with the Service Information.Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - STANDARD PROCEDURE)