X34 - Check ACPSW Circuit For Short to Ground

- Key "OFF".

- AC Pressure Switch (ACPSW) disconnected.

- Powertrain Control Module (PCM) disconnected.

- Measure resistance between the ACPSW circuit at the ACPSW vehicle harness connector and the battery negative post.

- Is resistance greater than 10,000 ohms?

Yes -- Replace PCM. Reconnect all components. Re-evaluate symptom.

No -- Service ACPSW circuit short to ground. Reconnect all components. Re-evaluate symptom.