XB51 - Check If A/C Clutch Will Engage

- Key "OFF".

- Reconnect A/C Pressure (ACP) sensor.

- Start engine.

- Turn A/C "ON", wait 30 seconds.

- Does the A/C clutch "click" on?

Yes -- Key "OFF", A/C "OFF". Go to XB52 (ACP circuit is not open or short to power). XB52 - Clear and Attempt to Regenerate DTC

No -- Key "OFF", A/C "OFF". Go to XB57 (to check if ACP circuit is OK). XB57 - Check For Voltage to A/C Clutch (Using Test Lamp)