P0A5F

DTC P0A5F (25): U Phase Motor Current Sensor Circuit High Voltage
1. Turn the ignition switch ON (II).
2. Check the U PHASE MOTOR CURRENT SENSOR in the DATA LIST with the HDS.
Is about 4.84 V or more indicated?
YES - Go to step 3.
NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the U phase motor current sensor and the MCM.

3. Turn the ignition switch OFF.
4. Turn the battery module switch OFF.
5. Remove the IPU lid.
6. Disconnect the U phase motor current sensor 3P connector.
7. Turn the ignition switch ON (II). Measure voltage between U phase motor current sensor 3P connector terminals No. 1 and No. 2.





Is there about 5 V?
YES - Replace the U phase motor current sensor, then go to step 11.
NO - Go to step 8.

8. Turn the ignition switch OFF.
9. Disconnect MCM connector A (31P).
10. Check for continuity between U phase motor current sensor 3P connector terminal No. 2 and MCM connector terminal A15.





Is there continuity?
YES - Go to step 17.
NO - Repair open in the wire between the U phase motor current sensor and the MCM (A15), then go to step 11.

11. Turn the ignition switch OFF.
12. Reconnect all connectors.
13. Reinstall the IPU lid, then turn the battery module switch ON.
14. Turn the ignition switch ON (II).
15. Reset the MCM.
16. Check for Temporary DTCs or DTCs with the HDS.
Are any Temporary DTCs or DTCs indicated?
YES - If DTC P0A5F is indicated, check for poor connections or loose terminals at the U 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.

17. Reinstall the IPU lid, then turn the battery module switch ON.
18. Update the MCM if it does not have the latest software, or substitute a known-good MCM.
19. Check for Temporary DTCs or DTCs with the HDS.
Are any Temporary DTCs or DTCs indicated?
YES - If DTC P0A5F is indicated, check for poor connections or loose terminals at the U 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.