P15A4
DTC P15A4 (81): A/C Compressor Driver Relay Stays Activated1. Turn the ignition switch ON (II).
2. Reset the MCM.
3. Note the outside temperature.
NOTE: Outside temperature is above 41°F (5°C).
4. Start the engine, let it idle 5 minutes.
5. Turn the A/C on, then set to 72°F (22°C).
6. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P15A4 indicated?
YES - Go to step 7.
NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the A/C driver and the MCM.
7. Turn the ignition switch OFF.
8. Turn the battery module switch OFF.
9. Remove the cover (A). Check the connections at the A/C compressor power cable connector (B) in the engine compartment.
Is the connection OK?
YES - Go to step 10.
NO - Repair connection, then go to step 13.
10. Remove the IPU lid.
11. Disconnect the A/C compressor power cable (A) from the stay.
NOTE: Wrap A/C compressor power cables with insulating tape (B).
12. Check for continuity between A/C compressor power cable terminals (A) and (B), (B) and (C), (C) and (A) individually.
Is there continuity?
YES - Replace the A/C compressor driver, then go to step 13.
NO - Replace the A/C compressor and A/C compressor power cable, then go to step 13.
13. Turn the ignition switch OFF.
14. Reconnect all connectors.
15. Reinstall the IPU lid, then turn the battery module switch ON.
16. Turn the ignition switch ON (II).
17. Reset the MCM.
18. Note the outside temperature.
NOTE: Outside temperature is above 41°F (5°C).
19. Start the engine, let it idle 5 minutes.
20. Turn the A/C on, then set to 77°F (25°C).
21. Check for Temporary DTCs or DTCs with the HDS.
Are any Temporary DTCs or DTCs indicated?
YES - If DTC P15A4 is indicated, check for poor connections or loose terminals at the A/C driver and the MCM, 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.