P1388

Tests 488 - 493:

Tests 494 - 496:

SYMPTOM
P-1388 AUTO SHUTDOWN RELAY CONTROL CIRCUIT

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

POSSIBLE CAUSES
- No possible causes remaining
- Fused ignition switch output circuit open
- Wiring and connectors observable defective
- Wiring harness intermittent defect
- ASD relay defective
- ASD relay control circuit open
- ASD relay control short to ground
- PCM def (ASD relay control circuit)