P0A5E
DTC P0A5E (24): U Phase Motor Current Sensor Circuit Low Voltage1. Turn the ignition switch ON (II).
2. Check the U PHASE MOTOR CURRENT SENSOR in the DATA LIST with the HDS.
Is about 0.15 V or less 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. Check for Temporary DTCs or DTCs with the HDS.
Are DTC P0A5E, P0A61, and P0A64 indicated at the same time?
YES - Go to step 21.
NO - Go to step 4.
4. Turn the ignition switch OFF,
5. Turn the battery module switch OFF.
6. Remove the IPU lid.
7. Disconnect the U phase motor current sensor 3P connector.
8. Turn the ignition switch ON (II).
9. Measure voltage between U phase motor current sensor 3P connector terminals No. 1 and No. 2.
Is there about 5 V?
YES - Go to step 10.
NO - Go to step 18.
10. Turn the ignition switch OFF.
11. Disconnect MCM connector A (31P).
12. Check for continuity between U phase motor current sensor 3P connector terminal No. 3 and body ground.
Is there continuity?
YES - Repair short in the wire between the U phase motor current sensor and the MCM (A19), then go to step 41.
NO - Go to step 13.
13. Check for continuity between U phase motor current sensor 3P connector terminal No. 3 and MCM connector terminal A19.
Is there continuity?
YES - Go to step 14.
NO - Repair open in the wire between the U phase motor current sensor and the MCM (A19), then go to step 41.
14. Reconnect MCM connector A (31P).
15. Connect U phase motor current sensor 3P connector terminals No. 1 and No. 3 with a jumper wire.
16. Turn the ignition switch ON (II).
17. Check the U PHASE MOTOR CURRENT SENSOR in the DATA LIST with the HDS.
Is about 0.15 V or less indicated?
YES - Go to step 47.
NO - Replace the U phase motor current sensor, then go to step 41.
18. Turn the ignition switch OFF.
19. Disconnect MCM connector A (31P).
20. Check for continuity between U phase motor current sensor 3P connector terminal No. 1 and MCM connector terminal A18.
Is there continuity?
YES - Go to step 47.
NO - Repair open in the wire between the U phase motor current sensor and the MCM (A18), then go to step 41.
21. Turn the ignition switch OFF.
22. Turn the battery module switch OFF.
23. Remove the IPU lid.
24. Disconnect the U phase motor current sensor 3P connector.
25. Turn the ignition switch ON (II).
26. Reset the MCM.
27. Check for Temporary DTCs or DTCs with the HDS.
Are DTCs P0A5E, P0A61, and P0A64 indicated at the same time?
YES - Go to step 28.
NO - Replace the U phase motor current sensor, then go to step 41.
28. Turn the ignition switch OFF.
29. Disconnect the V phase motor current sensor 3P connector.
30. Turn the ignition switch ON (II).
31. Reset the MCM.
32. Check for Temporary DTCs or DTCs with the HDS.
Are DTCs P0A5E, P0A61, and P0A64 indicated at the same time?
YES - Go to step 33.
NO - Replace the V phase motor current sensor, then go to step 41.
33. Turn the ignition switch OFF.
34. Disconnect the W phase motor current sensor 3P connector.
35. Turn the ignition switch ON (II).
36. Reset the MCM.
37. Check for Temporary DTCs or DTCs with the HDS.
Are DTCs P0A5E, P0A61, and P0A64 indicated at the same time?
YES - Go to step 38.
NO - Replace the W phase motor current sensor, then go to step 41.
38. Turn the ignition switch OFF.
39. Disconnect MCM connector A (31P).
40. Check for continuity between U/V/W phase motor current sensor 3P connector terminal No. 1 and body ground individually.
Is there continuity?
YES - Repair short in the wire between the U/V/W phase motor current sensor and the MCM (A16, A17, or A18), then go to step 41.
NO - Go to step 46.
41. Turn the ignition switch OFF.
42. Reconnect all connectors.
43. Reinstall the IPU lid, then turn the battery module switch ON.
44. Turn the ignition switch ON (II).
45. Reset the MCM.
46. Check for Temporary DTCs or DTCs with the HDS.
Are any Temporary DTCs or DTCs indicated?
YES - If DTC P0A5E 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.
47. Reinstall the IPU lid, then turn the battery module switch ON.
48. Update the MCM if it does not have the latest software, or substitute a known-good MCM.
49. Check for Temporary DTCs or DTCs with the HDS.
Are any Temporary DTCs or DTCs indicated?
YES - If DTC P0A5E 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.