P1388 Auto Shutdown Relay Control Circuit

SYMPTOM
P-1388 ASD RELAY CONTROL CIRCUIT

WHEN MONITORED
With ignition key on and battery voltage greater than 10.4 volts.

POSSIBLE CAUSES
- Fused ignition switch output circuit open
- ASD relay defective
- ASD relay control circuit open
- ASD relay control circuit wiring harness intermittent defect
- ASD relay control circuit wiring harness observable defect
- ASD relay control short to ground
- PCM defective