P1575

DTC P1575 (12): Motor Power Inverter (MPI) Module Voltage Malfunction

NOTE: If the battery module switch is turned OFF and the ignition switch is ON (II), DTC P1575 may be detected.

1. Turn the ignition switch ON (II).
2. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P1445 indicated?
YES - Do the troubleshooting for DTC P1445.
NO - Go to step 3.

3. Turn the ignition switch ON (II), wait 1 minute.
4. Check the MPI VOLTAGE, TOTAL VOLTAGE IMA BATT. MDLS in the DATA LIST with the HDS.
Is there more than 9 V difference between MPI VOLTAGE and TOTAL VOLTAGE IMA BATT. MDLS?
YES - Go to step 9.
NO - Go to step 5.

5. Clear the DTC with the HDS.
6. Check the SOC in the DATA LIST with the HDS.
7. Start the engine, and hold it between 3,500 rpm and 4,000 rpm without load (in Park or neutral) until the SOC increases above 70 %.
8. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P1575 indicated?
YES - Go to step 25.
NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the MPI module, the high voltage contactor, and the MCM.

9. Note the value of MPI VOLTAGE in the DATA LIST with the HDS.
10. Compare the MPI VOLTAGE and the TOTAL VOLTAGE IMA BATT. MDLS in the DATA LIST with the HDS.
Did MPI VOLTAGE change 9 V or less?
YES - Go to step 11.
NO - Go to step 21.

11. Turn the ignition switch OFF.
12. Turn the battery module switch OFF.
13. Remove the IPU lid.
14. Check the high voltage cable (orange cable) connection and busbar connection on the junction board.
Are the connections OK?
YES - Go to step 15.
NO - Repair the connections, then go to step 29.

15. Disconnect the high voltage contactor 2P connector.
16. At the contactor side, check for continuity between high voltage contactor 2P connector terminals No. 1 and No. 2.





Is there continuity?
YES - Go to step 17.
NO - Replace the high voltage contactor, then go to step 29.

17. At the wire harness side, check for continuity between high voltage contactor 2P connector terminal No. 1 and body ground.





Is there continuity?
YES - Go to step 18.
NO - Repair open in the wire between the high voltage contactor and G652, then go to step 29.

18. Disconnect MCM connector B (24P).
19. Check for continuity between MCM connector terminal B13 and body ground.





Is there continuity?
YES - Repair short in the wire between the high voltage contactor and the MCM (B13), then go to step 29.
NO - Go to step 20.

20. Check for continuity between MCM connector terminal B13 and high,voltage contactor 2P connector terminal No. 2.





Is there continuity?
YES - Go to stop 36.
NO - Repair open in the wire between the high voltage contactor and the MCM (B13), then go to step 29.

21. Turn the ignition switch OFF.
22. Turn the battery module switch OFF.
23. Remove the IPU lid.
24. Check the MCM connector connection.
Is the connection OK?
YES - Go to stop 25.
NO - Repair the connection, then go to step 29.

25. Turn the ignition switch ON (II).
26. Note the value of BATT. MDL VOLTAGE 1 to BATT. MDL VOLTAGE 10 in the DATA LIST with the HDS.
27. Disconnect MCM connector C (14P).
28. Measure voltage between the following MCM connector terminals, then compare the following value of BATT. MDL VOLTAGE 1 to BATT. MDL VOLTAGE 10 in the DATA LIST with the HDS.
^ C14 and C6, and value of BATT. MDL VOLTAGE 1
^ C6 and C13, and value of BATT. MDL VOLTAGE 2
^ C13 and C5, and value of BATT. MDL VOLTAGE 3
^ C5 and C12, and value of BATT. MDL VOLTAGE 4
^ C1 2 and C4, and value of BATT. MDL VOLTAGE 5
^ C3 and C9, and value of BATT. MDL VOLTAGE 6
^ C9 and C2, and value of BATT. MDL VOLTAGE 7
^ C2 and C8, and value of BATT. MDL VOLTAGE 8
^ C8 and C1, and value of BATT. MDL VOLTAGE 9
^ C1 and C7, and value of BATT. MDL VOLTAGE 10





Is there more than 1 V difference between the MCM measurement and the DATA LIST measurement?
YES - Go to step 36.
NO - Replace the battery module, then go to step 29.

29. Turn the ignition switch OFF.
30. Reconnect all connectors.
31. Reinstall the IPU lid, then turn the battery module switch ON.
32. Turn the ignition switch ON (II).
33. Reset the MCM.
34. Turn the ignition switch ON (II), and wait 1 minute.
35. Check for Temporary DTCs or DTCs with the HDS.
Are any Temporary DTCs or DTCs indicated?
YES - If DTC P1575 is indicated, check for poor connections or loose terminals at the MPI module, the high voltage contactor, 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.

36. Reinstall the IPU lid, then turn the battery module switch ON.
37. Update the MCM if it does not have the latest software, or substitute a known-good MCM.
38. Turn the ignition switch ON (II), and wait 1 minute.
39. Check for Temporary DTCs or DTCs with the HDS.
Are any Temporary DTCs or DTCs indicated?
YES - If DTC P1575 is indicated, check for poor connections or loose terminals at the MPI module, the high voltage contactor, 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.