P15A8

DTC P15A8 (88): W Phase Motor Current Sensor Circuit Malfunction
1. Turn the ignition switch ON (II).
2. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P0A64, and/or P0A65 indicated?
YES - Do the troubleshooting for DTC P0A64, and/or P0A65.
NO - Go to step 3.

3. Reset the MCM.
4. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P15A8 indicated?
YES - Go to step 5.
NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the W phase motor current sensor and the MCM.

5. Turn the ignition switch OFF.
6. Turn the battery module switch OFF.
7. Remove the IPU lid.
8. Measure voltage between W phase motor current sensor 3P connector terminals No. 1 and No. 2.





Is there 4.8 - 5.2 V?
YES - Go to step 9.
NO - Go to step 16.

9. Measure voltage between W phase motor current sensor 3P connector terminals No. 2 and No. 3.





Is there 2.3 - 2.7 V?
YES - Go to step 16.
NO - Replace the W phase motor current sensor, then go to step 10.

10. Turn the ignition switch OFF.
11. Reconnect all connectors.
12. Reinstall the IPU lid, then turn the battery module switch ON.
13. Turn the ignition switch ON (II).
14. Reset the MCM.
15. Check for Temporary DTCs or DTCs with the HDS.
Are any Temporary DTCs or DTCs indicated?
YES - If DTC P15A8 is indicated, check for poor connections or loose terminals at the W phase motor current sensor 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.

16. Reinstall the IPU lid, then turn the battery module switch ON.
17. Update the MCM if it does not have the latest software, or substitute a known-good MCM.
18. Check for Temporary DTCs or DTCs with the HDS.
Are any Temporary DTCs or DTCs indicated?
YES - If DTC P15A8 is indicated, check for poor connections or loose terminals at the W phase motor current sensor 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 - If the MCM was updated, troubleshooting is complete. If the MCM was substituted, replace the original MCM.