P1388

Tests 497 - 501:

Tests 502 - 504:

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 ckt wiring harness observable defective
- ASD relay control short to ground
- ASD relay control wiring harness intermittent defect
- PCM def (ASD relay control circuit)