P1388 Auto Shutdown Relay Control Circuit

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
- ASD relay control circuit open
- ASD relay control circuit short to ground
- Wiring harness intermittent defect
- Wiring harness observable defect
- Auto shutdown relay defective
- Powertrain control module defective