P0688

Test 1 - Test 2:

Test 3 - Test 6:

Test 7 - Test 8:

SYMPTOM
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