X23 - Check Fan Running Mode

- Key "OFF".

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

- Connect Constant Control Relay Module (CCRM).

- Key "ON", engine "OFF".

- Does fan run?

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

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