P15A4

DTC P15A4 (81): A/C Compressor Driver Relay Stays Activated
1. Turn the ignition switch ON (II).
2. Make sure the outside temperature is above 41°F (5°C).
3. Start the engine, and let it idle 5 minutes.
4. Turn the A/C on, and set it to 72°F (22°C).
5. Monitor the OBD STATUS for DTC P15A4 (81) in the DTCs MENU with the HDS.
Does the screen indicate FAILED?
YES - Go to step 6.
NO - If the screen indicates PASSED, intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the A/C compressor driver and the BCM module. If the screen indicates NOT COMPLETED, go to step 1 and recheck.

6. Turn the ignition switch OFF.
7. Turn the battery module switch OFF.
8. Remove the cover (A). Check the connections at the A/C compressor power cable connector (B) in the engine compartment.





Are the connections OK?
YES - Go to step 9.
NO - Repair the connections, then go to step 15.

9. Disconnect the A/C compressor power cable connector (A) in the engine compartment.





10. Check for continuity between A/C compressor power cable terminals B and C, C and D, and D and B individually.
Is there continuity?
YES - Replace the A/C compressor driver, then go to step 15.
NO - Go to step 11.

11. Reconnect the A/C compressor power cable.
12. Remove the IPU lid.
13. Disconnect the A/C compressor power connector (A) from the A/C compressor driver.





14. Check for continuity between A/C compressor power cable terminals A and B, B and C, and C and A individually.





Is there continuity?
YES - Replace the A/C compressor driver, then go to step 15.
NO - Replace the motor power cable, then go to step 15.

15. Turn the ignition switch OFF.
16. Reconnect all connectors.
17. Reinstall the IPU lid, then turn the battery module switch ON.
18. Turn the ignition switch ON (II).
19. Reset the BCM module with the HDS.
20. Make sure the outside temperature is above 41°F (5°C).
21. Start the engine, and let it idle 5 minutes.
22. Turn the A/C on, and set it 72°F (22°C).
23. Check for IMA system Temporary DTCs or DTCs with the HDS.
Are any Temporary DTCs or DTCs indicated?
YES - If DTC P15A4 (81) is indicated, check for poor connections or loose terminals at the BCM module and the A/C compressor driver, then go to step 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.
NO - Go to step 24.

24. Monitor the OBD STATUS for DTC P15A4 (81) in the DTCs MENU with the HDS.
Does the screen indicate PASSED?
YES - Troubleshooting is complete.
NO - If the screen indicates FAILED, check for poor connections or loose terminals at the BCM module and the A/C compressor driver, then go to step 1. If the screen indicates NOT COMPLETED, go to step 19 and recheck.