IMA System
DTC P0AE1 (62): Bypass Contactor MalfunctionNOTE: Before you troubleshoot, record all freeze data, and review the general troubleshooting information.
1. Turn the ignition switch ON (II).
2. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P0A78 (32) or P1570 (66) indicated?
YES - Do the troubleshooting for DTC P0A78 (32), or DTC P1570 (66).
NO - Go to step 3.
3. Compare the MPI VOLTAGE, and the TOTAL VOLTAGE OF ALL IMA BATTERY MODULES in the DATA LIST with the HDS.
Is there more than 21.37 V difference between MPI VOLTAGE and TOTAL VOLTAGE OF ALL IMA BATTERY MODULES?
YES - Go to step 4.
NO - Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the high voltage contactor, the bypass contactor, the DC-DC converter, and the BCM module.
4. Check the battery module switch.
Is the battery module switch ON?
YES - Go to step 5.
NO - Turn the ignition switch OFF, then turn the battery module switch ON, and go to step 25.
5. Turn the ignition switch OFF.
6. Turn the battery module switch OFF.
7. Remove the IPU lid.
8. Turn the battery module switch ON.
9. Measure voltage between battery module terminals + (A) and - (B).
NOTE: Wear insulated gloves.
Is there more than 135 V?
YES - Go to step 10.
NO - Replace the battery module, then go to step 22.
10. Turn the battery module switch OFF, and disconnect the DC-DC converter 4P connector.
11. Turn the battery module switch ON.
12. Turn the ignition switch ON (II).
13. Compare the MPI VOLTAGE and the TOTAL VOLTAGE OF ALL IMA BATTERY MODULES in the DATA LIST with the HDS.
Is there more than 21.37 V difference between MPI VOLTAGE and TOTAL VOLTAGE OF ALL IMA BATTERY MODULES?
YES - Go to step 14.
NO - Replace the DC-DC converter, then go to step 22.
14. Turn the ignition switch OFF.
15. Disconnect BCM module connector A (40P).
16. Check for continuity between BCM module connector terminals A13 and A28.
Is there continuity?
YES - Go to step 19.
NO - Go to step 17.
17. Disconnect the junction board 12P connector.
18. Check for continuity between these terminals;
- BCM module connector terminal A13 and junction board 12P connector terminal No. 7.
- 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 22.
NO - Repair open in the wire between the junction board 12P connector and the BCM module (A13, A28), then go to step 22.
19. Check for continuity between BCM module connector terminal A13and body ground.
Is there continuity?
YES - Go to step 20.
NO - Replace the battery module, then go to step 29.
20. Disconnect the junction board 12P connector.
21. Check for continuity between BCM module connector terminal A13 and body ground.
Is there continuity?
YES - Repair short in the wire between the junction board 12P connector and the BCM module (A13), then go to step 22.
NO - Replace the battery module.
22. Turn the ignition switch OFF.
23. Reconnect all connectors.
24. Reinstall the IPU lid, then turn the battery module switch ON.
25. Turn the ignition switch ON (II).
26. Clear the DTC with the HDS.
27. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P0AE1 (62) indicated?
YES - Check for poor connections or loose terminals at the high voltage connector, the bypass contactor, the DC-DC converter, the MCM, and the BCM module, then go to step 1.
NO - Go to step 28.
28. Monitor the OBD STATUS for P0AE1 (62) in the DTCs MENU with the HDS.
Does the screen indicate PASSED?
YES - Troubleshooting is complete. If any other Temporary DTCs or DTCs were indicated in step 27, go to the indicated DTCs troubleshooting.
NO - If the screen indicates FAILED, check for poor connections or loose terminals at high voltage connector, the bypass connector, the DC-DC converter, the MCM, and the BCM module, then go to step 1. If the screen indicates NOT COMPLETED, keep the ignition switch ON (II) until a result comes on.
29. Reconnect all connectors.
30. Reinstall the IPU lid, then turn the battery module switch ON.
31. Update the BCM module if it does not have the latest software, or substitute a known-good BCM module.
32. Turn the ignition switch ON (II).
33. Clear the DTC with the HDS.
34. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P0AE1 (62) indicated?
YES - Check for poor connections or loose terminals at the high voltage connector, the bypass contactor, the DC-DC converter, the MCM, and the BCM module. If the BCM module was updated, substitute a known-good BCM module, then go to step 32. If the BCM module was substituted, go to step 36.
NO - Go to step 35.
35. Monitor the OBD STATUS for P0AE1 (62) 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. If any other Temporary DTCs or DTCs were indicated in step 34, go to the indicated DTCs troubleshooting.
NO - If the screen indicates FAILED, check for poor connections or loose terminals at the high voltage connector, the bypass contactor, the DC-DC converter, the MCM, and the BCM module. If the BCM module was updated, substitute a known-good BCM module, then go to step 32. If the BCM module was substituted, go to step 36. If the screen indicates NOT COMPLETED, keep the ignition switch ON (II) until a result comes on.
36. Update the MCM if it does not have the latest software, or substitute a known-good MCM.
37. Turn the ignition switch ON (II).
38. Clear the DTC with the HDS.
39. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P0AE1 (62) indicated?
YES - Check for poor connections or loose terminals at the high voltage connector, the bypass contactor, the DC-DC converter, the MCM, and the BCM module. If the MCM was updated, substitute a known-good MCM, then go to step 38. If the MCM was substituted, go to step 1.
NO - Go to step 40.
40. Monitor the OBD STATUS for P0AE1 (62) 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. If any other Temporary DTCs or DTCs were indicated in step 39, go to the indicated DTCs troubleshooting.
NO - If the screen indicates FAILED, check for poor connections or loose terminals at the high voltage connector, the bypass contactor, the DC-DC converter, the MCM, and the BCM module. If the MCM was updated, substitute a known-good MCM, then go to step 37. 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.