P1388

Tests 1 - 3:

Tests 4 - 7:

SYMPTOM
P1388-AUTO SHUTDOWN RELAY CONTROL CIRCUIT

WHEN MONITORED
With ignition key ON and battery voltage above 10.4 volts.

SET CONDITION
An open or shorted condition is detected in the ASD relay control circuit.

POSSIBLE CAUSES
- Intermittent condition
- ASD relay resistance
- Fused ignition switch output circuit
- ASD relay control circuit shorted to ground
- ASD relay control circuit open
- PCM