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Home >> Lincoln >> 1995 >> 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) >> XB41 - Check ACP Sensor
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XB41 - Check ACP Sensor



- Clear continuous memory again. Clearing Diagnostic Trouble Codes

- Key "OFF".

- Disconnect A/C Pressure (ACP) sensor.

- Start engine, wait 15 seconds.

- Engine "OFF".

- Rerun Key On Engine Off (KOEO) Self-Test. Quick Test Appendix (Detailed Testing Instructions)

- Is Continuous Memory Diagnostic Trouble Code (DTC) 578 present (disregard any other codes)?

Yes -- Go to XB42. XB42 - Check ACP VREF Circuit For Short to Ground

No -- Replace ACP sensor. Reconnect all components. Clear continuous memory. Clearing Diagnostic Trouble Codes

Start engine, wait 15 seconds. Key "OFF". Rerun quick test. Quick Test Appendix (Detailed Testing Instructions)
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