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)