Operation CHARM: Car repair manuals for everyone.
Home >> Lincoln >> 1994 >> Mark VIII V8-4.6L DOHC >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Testing and Inspection >> Pinpoint Tests >> XB - Variable Control Relay Module (VCRM) >> XB51 - Check If A/C Clutch Will Engage
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

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)
pro multis · About Operation CHARM