Auto Shutdown Relay Circuit

What this code means

The PCM has detected a malfunction in the Auto Shutdown (ASD) relay circuit. The ASD relay provides power to the fuel injectors, ignition coils, oxygen sensor heaters, and other critical engine management components.

Symptoms

• Check Engine Light
• Engine may not start
• Engine stalls and will not restart
• Intermittent no-start condition
• Loss of injector and coil power

Common causes

• Faulty ASD relay
• Wiring open or short in ASD relay circuit
• Corroded ASD relay socket
• PCM driver circuit failure
• Blown ASD fuse

Diagnostic steps

1. Swap ASD relay with a known good relay
2. Check ASD relay socket for power, ground, and PCM control signal
3. Inspect ASD relay wiring for opens or shorts
4. Test PCM ASD control output
5. Check ASD fuse

Repair notes

Replace the ASD relay and inspect the relay socket for corrosion or damage.

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