DTC Troubleshooting
DTC Troubleshooting: P1440 (57)
DTC P1440 (57):
Motor Power Inverter (MPI) module Output Circuit Malfunction
NOTE:
- Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information Initial Inspection and Diagnostic Overview.
- If the DTC cannot be cleared, do the troubleshooting for DTC U1204 (55).
1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
3. Check under these conditions:
- Headlights on high beam
- Blower fan at maximum speed
- Rear window defogger on
4. Start the engine, and let it idle 1 minute.
5. Check for Pending or Confirmed DTCs with the HDS.
Is DTC P0A3F (89), P0A5E (24), P0A5F (25), P0A61 (26), P0A62 (27), P0A64 (28), P0A65 (29), P0BE6 (86), P0BEA (87), P0BEE (88), or P0BFD (30) indicated?
YES -
Go to the indicated DTC's troubleshooting.�
NO -
Go to step 6.
6. Monitor the OBD STATUS for DTC P1440 (57) in the DTCs MENU with the HDS.
Does the screen indicate PASSED?
YES -
Intermittent failure, the system is OK at this time.�
NO -
If the screen indicates FAILED, go to step 7. If the screen indicates NOT COMPLETED, go to step 3.
7. Turn the ignition switch to LOCK (0).
8. Turn the battery module switch OFF.
9. Remove the IPU cover IPU Cover Removal/Installation.
10. Remove the PCU lid Service and Repair.
11. Check the connections at the IMA motor power cables (A).
Are the connections OK?
YES -
Go to step 12.
NO -
Repair the connections, then go to step 25.
12. Remove the IMA motor power cables from the phase motor current sensor.
NOTE: Check the position of the U phase, the V phase, and the W phase cables before disconnecting them.
13. Check for continuity between IMA motor power cables A and B, and then between cables A and C.
Is there continuity?
YES -
Go to step 17.
NO -
Go to step 14.
14. Connect jumper wires between IMA motor power cables A and B, and A and C.
15. Disconnect the IMA motor power cable connector (A).
NOTE:
- Refer to disconnecting the IMA motor power cable connector from the motor stator.
- If the IMA motor power cable terminals are wet, dry them with a clean shop towel. Do not use compressed air.
16. Check for continuity between IMA motor power cable terminals A and B, and then between terminals A and C.
Is there continuity?
YES -
Replace the IMA motor housing IMA Motor Housing Removal/Installation, then go to step 25.
NO -
Replace the IMA motor power cables Service and Repair, then go to step 25.
17. Reconnect the IMA motor power cable connector.
18. Remove the PCU busplate and the PCU cover Service and Repair.
19. Disconnect the MPI module 12P connector (A).
20. Disconnect MCM connector C (22P).
21. Check for continuity between these terminals:
- MCM connector terminal C15 and MPI module 12P connector terminal No. 8.
- MCM connector terminal C22 and MPI module 12P connector terminal No. 2.
- MCM connector terminal C21 and MPI module 12P connector terminal No. 9.
- MCM connector terminal C7 and MPI module 12P connector terminal No. 3.
- MCM connector terminal C14 and MPI module 12P connector terminal No. 10.
- MCM connector terminal C6 and MPI module 12P connector terminal No. 4.
Is there continuity?
YES -
Go to step 22.
NO -
Repair an open in the wire between the MPI module 12P connector and the MCM (C6, C7, C14, C15, C21, C22), then go to step 25.
22. Check for continuity between body ground and these MCM connector C (22P) terminals individually:
- C6
- C7
- C14
- C15
- C21
- C22
Is there continuity?
YES -
Repair a short in the wire between the MPI module 12P connector and the MCM (C6, C7, C14, C15, C20, C22), then go to step 25.
NO -
Go to step 23.
23. Reconnect MCM connector C (22P).
24. Measure the resistance between body ground and these MCM connector C (22P) terminals individually:
- C6
- C7
- C14
- C15
- C21
- C22
Is there about 10 kOhms?
YES -
Replace the MPI module Service and Repair, then go to step 25.
NO -
Go to step 34.
25. Reconnect all connectors.
26. Reinstall the PCU cover, the PCU busplate, and the PCU lid Service and Repair.
27. Reinstall the IPU cover IPU Cover Removal/Installation, then turn the battery module switch ON.
28. Turn the ignition switch to ON (II).
29. Clear the DTC with the HDS.
30. Check under these conditions:
- Headlights on high beam
- Blower fan at maximum speed
- Rear window defogger on
31. Start the engine, and let it idle 1 minute.
32. Check for Pending or Confirmed DTCs with the HDS.
Is DTC P1440 (57) indicated?
YES -
Check for poor connections or loose terminals at the MPI module, the IMA motor power cable, and the MCM, then go to step 1.
NO -
Go to step 33.
33. Monitor the OBD STATUS for DTC P1440 (57) in the DTCs MENU with the HDS.
Does the screen indicate PASSED?
YES -
Troubleshooting is complete. If any other Pending or Confirmed DTCs were indicated in step 32, go to the indicated DTC's troubleshooting.�
NO -
If the screen indicates FAILED, check for poor connections or loose terminals at the MPI module, the IMA motor power cable, and the MCM, then go to step 1. If the screen indicates NOT COMPLETED, go to step 30.
34. Reconnect all connectors.
35. Reinstall the PCU cover, the PCU busplate, and the PCU lid Service and Repair.
36. Reinstall the IPU cover IPU Cover Removal/Installation, then turn the battery module switch ON.
37. Update the MCM if it does not have the latest software Testing and Inspection, or substitute a known-good MCM.
38. Check under these conditions:
- Headlights on high beam
- Blower fan at maximum speed
- Rear window defogger on
39. Start the engine, and let it idle 1 minute.
40. Check for Pending or Confirmed DTCs with the HDS.
Is DTC P1440 (57) indicated?
YES -
Check for poor connections or loose terminals at the MPI module, the IMA motor power cable, and the MCM. If the MCM was updated, substitute a known-good MCM, and recheck. If the MCM was substituted, go to step 1.
NO -
Go to step 41.
41. Monitor the OBD STATUS for DTC P1440 (57) in the DTCs MENU with the HDS.
Does the screen indicate PASSED?
YES -
If the MCM was updated, troubleshooting is complete. If the MCM was substituted, replace the original MCM Service and Repair. If any other Pending or Confirmed DTCs were indicated in step 40, go to the indicated DTC's troubleshooting.�
NO -
If the screen indicates FAILED, check for poor connections or loose terminals at the MPI module, the IMA motor power cable, and the MCM. If the MCM was updated, substitute a known-good MCM, and recheck. If the MCM was substituted, go to step 1. If the screen indicates NOT COMPLETED, go to step 38.