KM64 - Check A/C ON Circuit Continuity

- Key "OFF".

- A/C relay disconnected.

- Breakout box installed, Powertrain Control Module (PCM) disconnected.

- Measure resistance between test pin 54 at breakout box and A/C ON circuit at A/C relay vehicle harness connector.

- Is resistance less than 5.0 ohms?

Yes -- Replace PCM. Remove breakout box. Reconnect all components. Rerun quick test. Quick Test Appendix (Detailed Testing Instructions)

No -- Service open circuit. Remove breakout box. Reconnect all components. Rerun quick test. Quick Test Appendix (Detailed Testing Instructions)