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Symptom: P0688-ASD RELAY SENSE CIRCUIT LOW When Monitored and Set Condition: P0688-ASD RELAY SENSE CIRCUIT LOW When Monitored: With ignition key on. Battery voltage greater than 10 volts. Set Condition: No voltage sensed at the PCM when the ASD relay is energized for 3.075 seconds. Three good trips to clear the MIL. POSSIBLE CAUSES VERIFY ASD DTC ASD RELAY (A209) FUSED B+ CIRCUITS (K334) ASD RELAY OUTPUT CIRCUIT OPEN (NO START) (K334) ASD RELAY OUTPUT CIRCUIT SHORTED TO GROUND (K334) ASD RELAY OUTPUT CIRCUIT OPEN (START) PCM TEST ACTION APPLICABILITY 1 NOTE: Diagnose P0685 - Auto Shutdown Relay Control Circuit first if set t, erase the DTC. Attempt to start the engine. If the engine will not start, crank the engine for at least All Yes → Go To 2 No → Refer to the INTERMITTENT CONDITION Symptom (Diagnos- tic Procedure). 2 Attempt to start the engine. All Yes → Go To 3 No → Go To 4 241 DRIVEABILITY - NGC |