X26 - FC/LFC Circuit Fault Isolation Check

- Key "OFF".

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

- Reconnect Constant Control Relay Module (CCRM).

- Key "ON", engine "OFF".

- Jumper test pin 13 to test pin 40 or 60 at the breakout box.

- Does fan continue to run?

Yes -- Key "OFF". Remove jumper. If Diagnostic Trouble Code (DTC) 563 was also present with the 564, go to X150.

If not, replace CCRM. Remove breakout box. Reconnect all components. Rerun quick test. Quick Test Appendix (Detailed Testing Instructions)

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