DTC Troubleshooting
DTC Troubleshooting: P1575 (12)
DTC P1575 (12):
Motor Power Inverter (MPI) Module Voltage 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 battery module switch is turned OFF while the ignition switch is ON (II), DTC P1575 (12) may be detected.
- 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 for Pending or Confirmed DTCs with the HDS.
Is DTC P0AE1 (62) indicated?
YES -
Do the troubleshooting for DTC P0AE1 (62) P0AE1.
NO -
Go to step 4.
4. Check for Pending or Confirmed DTCs with the HDS.
Is DTC P1575 (12) indicated?
YES -
Go to step 5.
NO -
Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the junction board, the MCM, and the MPI module.�
5. Turn the ignition switch to LOCK (0).
6. Turn the battery module switch OFF.
7. Remove the IPU cover IPU Cover Removal/Installation.
8. Remove the PCU lid, the PCU busplate, and the PCU cover Service and Repair.
9. Disconnect MCM connector B (24P).
10. Measure the resistance between MCM connector terminals B14 and B15.
Is there 23.4-28.6 Ohms?
YES -
Go to11.
NO -
- If the resistance is too high, go to step 17.
- If the resistance is too low, go to step 19.
11. Check for continuity between MCM connector terminal B14 and body ground.
Is there continuity?
YES -
Go to step 12.
NO -
Go to step 14.
12. Disconnect the junction board 12P connector (A).
13. Check for continuity between MCM connector terminal B14 and body ground.
Is there continuity?
YES -
Repair a short in the wire between the junction board 12P connector and the MCM (B14), then go to step 28.
NO -
Replace the battery module Service and Repair, then go to step 28.
14. Make sure the battery module switch is turned OFF.
15. Connect MCM connector terminal B14 to battery power and MCM connector terminal B15 to body ground.
16. Check for continuity between high voltage contactor terminals No. 1 (A) and No. 2 (B).
Is there continuity?
YES -
Go to step 21.
NO -
Replace the battery module Service and Repair, then go to step 28.
17. Disconnect the junction board 12P connector (A).
18. Check for continuity between MCM connector terminal B14 and junction board 12P connector terminal No. 1.
Is there continuity?
YES -
Replace the battery module Service and Repair, then go to step 28.
NO -
Repair an open in the wire between the junction board 12P connector and the MCM (B14), then go to step 28.
19. Disconnect the junction board 12P connector (A).
20. Check for continuity between MCM connector terminals B14 and B15.
Is there continuity?
YES -
Repair a short in the wire between the junction board 12P connector and the MCM (B14, B15), then go to step 28.
NO -
Replace the battery module Service and Repair, then go to step 28.
21. Reconnect MCM connector B (24P).
22. Turn the ignition switch to ON (II).
23. Record the value of IMA BATTERY MODULE 1 VOLTAGE through IMA BATTERY MODULE 7 VOLTAGE in the DATA LIST with the HDS.
24. Turn the ignition switch to LOCK (0).
25. Disconnect MCM connector E (31P).
26. Using the IMA BATTERY MODULE VOLTAGES you recorded in step 23, compare the voltages between the following MCM connector terminals and the recorded IMA BATTERY MODULE VOLTAGES in the DATA LIST with the HDS.
- E22 and E10, compared to IMA BATTERY MODULE 1 VOLTAGE
- E10 and E11, compared to IMA BATTERY MODULE 2 VOLTAGE
- E11 and E1, compared to IMA BATTERY MODULE 3 VOLTAGE
- E1 and E2, compared to IMA BATTERY MODULE 4 VOLTAGE
- E18 and E19, compared to IMA BATTERY MODULE 5 VOLTAGE
- E19 and E8, compared to IMA BATTERY MODULE 6 VOLTAGE
- E8 and E9, compared to IMA BATTERY MODULE 7 VOLTAGE
Is there more than a 1 V difference between the MCM measurement and the DATA LIST measurement?
YES -
Go to step 35.
NO -
Replace the MPI module Service and Repair, then go to step 27.
27. Turn the ignition switch to LOCK (0).
28. Reconnect all connectors.
29. Reinstall the PCU cover, the PCU busplate, and the PCU lid Service and Repair.
30. Reinstall the IPU cover IPU Cover Removal/Installation, then turn the battery module switch ON.
31. Turn the ignition switch to ON (II).
32. Clear the DTC with the HDS.
33. Check for Pending or Confirmed DTCs with the HDS.
Is DTC P1575 (12) indicated?
YES -
Check for poor connections or loose terminals at the junction board, the MCM, and the MPI module, then go to step 1.
NO -
Go to step 34.
34. Monitor the OBD STATUS for DTC P1575 (12) 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 33, go to the indicated DTC's troubleshooting.�
NO -
If the screen indicates FAILED, check for poor connections or loose terminals at the junction board, the MCM, and the MPI module, then go to step 1. If the screen indicates NOT COMPLETED, keep the ignition switch ON (II) until a result comes on.
35. Turn the ignition switch to LOCK (0).
36. Reconnect all connectors.
37. Reinstall the PCU cover, the PCU busplate, and the PCU lid Service and Repair.
38. Reinstall the IPU cover IPU Cover Removal/Installation, then turn the battery module switch ON.
39. Update the MCM if it does not have the latest software Testing and Inspection, or substitute a known-good MCM.
40. Turn the ignition switch to ON (II).
41. Check for Pending or Confirmed DTCs with the HDS.
Is DTC P1575 (12) indicated?
YES -
Check for poor connections or loose terminals at the junction board, the MCM, and the MPI module. 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 42.
42. Monitor the OBD STATUS for DTC P1575 (12) 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 41, go to the indicated DTC's troubleshooting.�
NO -
If the screen indicates FAILED, check for poor connections or loose terminals at the junction board, the MCM, and the MPI module. 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, keep the ignition switch ON (II) until a result comes on.