X53 - Check Continuity of ACPSW to CCRM

- Key "OFF".

- AC Pressure Switch (ACPSW) disconnected.

- Constant Control Relay Module (CCRM) disconnected.

ACPSW View:

- Measure resistance between the A/C demand to CCRM pin at the ACPSW vehicle harness connector and Pin 21 of the CCRM vehicle harness connector.

- Is resistance less than 5.0 ohms?

Yes -- Reconnect CCRM. Go to Heating and Air Conditioning to check the operation of the ACPSW. After any service, reconnect all other components and re-evaluate symptom.

No -- Service open circuit. Reconnect all components. Re-evaluate symptom.