DTC 63
DTC P1448 (63): IPU Module Fan Problem1. Turn the ignition switch ON (II).
2. Check for IMA system Temporary DTCs or DTCs with the HDS. is DTC P0A78 (32) indicated?
YES - Do the troubleshooting for DTC P0A78 (32).
NO - Go to step 3.
3. Clear the DTC with the HDS.
4. Do the IPU MODULE FAN DRIVE in the INSPECTION MENU with the HDS.
Does the screen indicate OUT OF RANGE?
YES - Go to step 5.
NO - If the screen indicates CONDITION IS NORMAL, intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the IPU module fan and the BCM module.
5. Turn the ignition switch OFF.
6. Turn the battery module switch OFF.
7. Remove the IPU lid.
8. Disconnect the IPU module fan 4P connector.
9. Connect IPU module fan 4P connector terminal No. 3 to body ground with a jumper wire.
10. Disconnect BCM module connector A (40P).
11. Check for continuity between BCM module connector terminal A30 and body ground.
Is there continuity?
YES - Go to step 12.
NO - Repair open in the wire between the IPU module fan and the BCM module (A30), then go to step 23.
12. Disconnect the jumper wire from the IPU module fan 4P connector.
13. Check for continuity between BCM module connector terminal A17 and body ground.
Is there continuity?
YES - Repair short in the wire between the IPU module fan and the BCM module (A17), then go to step 23.
NO - Go to step 14.
14. Connect IPU module fan 4P connector terminal No. 2 to body ground with a jumper wire.
15. Check for continuity between BCM module connector terminal A17 and body ground.
Is there continuity?
YES - Go to step 16.
NO - Repair open in the wire between the IPU module fan and the BCM module (A17), then go to step 23.
16. Disconnect the jumper wire from the IPU module fan 4P connector.
17. Check for continuity between IPU module fan 4P connector terminal No. 4 and body ground.
Is there continuity?
YES - Go to step 18.
NO - Repair open in the wire between the IPU module fan and G902, then go to step 23.
18. Reconnect BCM module connector A (40P).
19. Turn the ignition switch ON (II).
20. Measure voltage between IPU module fan 4P connector terminal No. 1 and body ground.
Is there battery voltage?
YES - Go to step 21.
NO - Repair open in the wire between the IPU module fan and MCM relay 2, then go to step 23.
21. Connect IPU module fan 4P connector terminals No. 2 and No. 3 with a jumper wire.
22. Do the IPU MODULE FAN DRIVE in the INSPECTION MENU with the HDS.
Does the screen indicate OUT OF RANGE?
YES - Go to step 29.
NO - If screen indicates CONDITION IS NORMAL, replace the IPU module fan, then go to step 23.
23. Turn the ignition switch OFF.
24. Reconnect all connectors.
25. Reinstall the IPU lid, then turn the battery module switch ON.
26. Turn the ignition switch ON (II).
27. Reset the BCM module with the HDS.
28. Check for IMA system Temporary DTCs or DTCs with the HDS.
Are any Temporary DTCs or DTCs indicated?
YES - If DTC P1448 (63) is indicated, check for poor connections or loose terminals at the IPU module fan and the BCM module, then go to step 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.
NO - Troubleshooting is complete.
29. Reinstall the IPU lid, then turn the battery module switch ON.
30. Update the BCM module if it does not have the latest software, or substitute a known-good BCM module.
31. Check for IMA system Temporary DTCs or DTCs with the HDS.
Is DTC P1448 (63) indicated?
YES - Check for poor connections or loose terminals at the IPU module fan and the BCM module. If the BCM module was updated, substitute a known-good BCM module, then recheck. If the BCM module was substituted, go to step 1.
NO - If the BCM module was updated, troubleshooting is complete. If the BCM module was substituted, replace the original BCM module. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.