XB59 - Check ACP Circuit For Short to VREF

- Key "OFF".

- A/C Pressure (ACP) sensor disconnected.

- Variable Control Relay Module (VCRM) disconnected.

- Measure resistance between the ACP circuit at the ACP VREF circuit at the ACP sensor vehicle harness connector.

- Was the resistance greater than 10,000 ohms?

Yes -- Go to XB60. XB60 - Check ACP Circuit For Short to Power

No -- Service ACP circuit short to ACP VREF. Remove test lamp and jumper. Reconnect all components. Clear continuous memory. Clearing Diagnostic Trouble Codes

A/C "OFF", Start engine. Turn A/C "ON", wait 20 seconds. Key "OFF", A/C "OFF". Rerun quick test. Quick Test Appendix (Detailed Testing Instructions)