DTC 12
DTC P1575 (12): MCM Voltage MalfunctionNOTE: If the battery module switch is turned OFF while the ignition switch is ON (II), DTC P1575 (12) may be detected.
1. Turn the ignition switch ON (II).
2. Check for IMA system Temporary DTCs or DTCs with the HDS.
Is DTC P0AE1 (62) indicated?
YES - Do the troubleshooting for DTC P0AE1 (62).
NO - Go to step 3.
3. Turn the ignition switch ON (II), then wait 1 minute.
4. Compare the MPI VOLTAGE and the TOTAL VOLTAGE OF ALL IMA BATTERY MODULES in the DATA LIST with the HDS.
Is there more than a 10 V difference between the MPI VOLTAGE and the TOTAL VOLTAGE OF ALL IMA BATTERY MODULES?
YES - Go to step 8.
NO - Go to step 5.
5. Check the SOC in the DATA LIST with the HDS.
6. Start the engine, and hold it between 3,500 rpm and 4,000 rpm without load (in Park or neutral) until the SOC changes to 70%.
7. Monitor the OBD STATUS for DTC P1575 (12) in the DTCs MENU with the HDS.
Does the screen indicate FAILED?
YES - Go to step 21.
NO - If the screen indicates PASSED, intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the MCM, the high voltage connector, and the BCM module. If the screen indicates NOT COMPLETED, go to step 3 and recheck.
8. Record the value of the MPI VOLTAGE in the DATA LIST with the HDS.
9. Compare the MPI VOLTAGE and the TOTAL VOLTAGE OF ALL IMA BATTERY MODULES in the DATA LIST with the HDS.
Is there more than a 10 V difference between the MPI VOLTAGE and the TOTAL VOLTAGE OF ALL IMA BATTERY MODULES?
YES - Go to step 10.
NO - Go to step 21.
10. Turn the ignition switch OFF.
11. Turn the battery module switch OFF.
12. Remove the IPU lid.
13. Check the high voltage cable (orange cable) connection and busbar connection on the junction board.
Is the connection OK?
YES - Go to step 14.
NO - Repair the connection, then go to step 29.
14. Disconnect BCM module connector A (40P).
15. Check for continuity between BCM module connector terminals A14 and A28.
Is there continuity?
YES - Go to step 16.
NO - Go to step 19.
16. Check for continuity between BCM module connector terminal A14 and body ground.
Is there continuity?
YES - Go to step 17.
NO - Go to step 38.
17. Disconnect the junction board 12P connector.
18. Check for continuity between BCM module connector terminal A14 and body ground.
Is there continuity?
YES - Repair short to ground in the wire between the junction board 12P connector and the BCM module (A14), then go to stop 29.
NO - Replace the battery module, then go to step 29.
19. Disconnect the junction board 12P connector.
20. Check for continuity between these terminals:
^ BCM module connector terminal A14 and junction board 12P connector terminal No. 1.
^ BCM module connector terminal A28 and junction board 12P connector terminal No. 2.
Is there continuity?
YES - Replace the battery module, then go to step 29.
NO - Repair open in the wire between the junction board 12P connector and the BCM module (A4, A28), 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 BCM module connector terminals.
Are the terminals OK?
YES - Go to step 25.
NO - Repair the BCM module connector terminals, then go to step 29.
25. Turn the ignition switch ON (II).
26. Record the values of IMA BATTERY MODULE 1 VOLTAGE through IMA BATTERY MODULE 11 VOLTAGE in the DATA LIST with the HDS.
27. Disconnect BCM module connector B (14P).
28. Measure voltage between the following BCM module connector terminals, then compare those values to the IMA BATTERY MODULE 1 VOLTAGE through IMA BATTERY MODULE 11 VOLTAGE that you recorded in step 26.
^ B6 and B14, compared to IMA BATTERY MODULE 1 VOLTAGE
^ B14 and 89, compared to IMA BATTERY MODULE 2 VOLTAGE
^ B9 and B8, compared to IMA BATTERY MODULE 3 VOLTAGE
^ B8 and B4, compared to IMA BATTERY MODULE 4 VOLTAGE
^ B4 and B12, compared to IMA BATTERY MODULE 5 VOLTAGE
^ B11 and B7, compared to IMA BATTERY MODULE 6 VOLTAGE
^ B7 and B1, compared to IMA BATTERY MODULE 7 VOLTAGE
^ B1 and B8, compared to IMA BATTERY MODULE 8 VOLTAGE
^ B8 and B2, compared to IMA BATTERY MODULE 9 VOLTAGE
^ B2 and B9, compared to IMA BATTERY MODULE 10 VOLTAGE
^ B9 and B3, compared to IMA BATTERY MODULE 11 VOLTAGE
Is there more than 1 V difference between the BCM module measurement and the DATA LIST measurement?
YES - Go to step 38.
NO - Go to step 44.
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 BCM module and the MCM with the HDS.
34. Check the SOC in the DATA LIST with the HDS.
35. Start the engine, and hold it between 3,500 rpm and 4,000 rpm without load (in Park or neutral) until the SOC is 70%.
36. Check for IMA system Temporary DTCs or DTCs with the HDS.
Are any Temporary DTCs or DTCs indicated?
YES - If DTC P1575 (12) is indicated, check for poor connections or loose terminals at the MCM, the high voltage contactor, and the BCM module, then go to step 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.
NO - Go to step 37.
37. Monitor the OBD STATUS for DTC P1575 (12) in the DTCs MENU with the HDS.
Does the screen indicate PASSED?
YES - Troubleshooting is complete.
NO - If the screen indicates FAILED, check for poor connections or loose terminals at the MCM, the high voltage connector, and the BCM module, then go to step 1. If the screen indicates NOT COMPLETED, go to step 34 and recheck.
38. Reinstall the IPU lid, then turn the battery module switch ON.
39. Update the BCM module if it does not have the latest software, or substitute a known-good BCM module.
40. Check the SOC in the DATA LIST with the HDS.
41. Start the engine, and hold it between 3,500 rpm and 4,000 rpm without load (in Park or neutral) until the SOC is 70%.
42. Check for IMA system Temporary DTCs or DTCs with the HDS.
Is DTC P1575 (12) indicated?
YES - Check for poor connections or loose terminals at the MCM, the high voltage connector, and the BCM module. If the BCM module was updated, substitute a known-good BCM module, then go to step 41. If the BCM module was substituted, go to step 1.
NO - If no Temporary DTCs or DTCs are indicated, go to step 43. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.
43. Monitor the OBD STATUS for DTC P1575 (12) in the DTCs MENU with the HDS.
Does the screen indicate PASSED?
YES - If the BCM module was updated, troubleshooting is complete. If the BCM module was substituted, replace the original BCM module.
NO - If the screen indicates FAILED, check for poor connections or loose terminals at the MCM, the high voltage connector, and the BCM module, then go to step 1. If the screen indicates NOT COMPLETED, go to step 40 and recheck.
44. Reinstall the IPU lid, then turn the battery module switch ON.
45. Update the MCM if it does not have the latest software, or substitute a known-good MCM.
46. Check the SOC in the DATA LIST with the HDS.
47. Start the engine, and hold it between 3,500 rpm and 4,000 rpm without load (in Park or neutral) until the SOC is 70%.
48. Check for IMA system Temporary DTCs or DTCs with the HDS.
Is DTC P1575 (12) indicated?
YES - Check for poor connections or loose terminals at the MCM, the high voltage connector, and the BCM module. If the MCM was updated, substitute a known-good MCM, then go to step 46. If the MCM was substituted, go to step 1.
NO - If no Temporary DTCs or DTCs are indicated, go to step 49. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.
49. 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.
NO - If the screen indicates FAILED, check for poor connections or loose terminals at the MCM, the high voltage connector, and the BCM module, then go to step 1. If the screen indicates NOT COMPLETED, go to step 46.