P1446

DTC P1446 (74): Battery Module Individual Voltage Input Deviation
1. Turn the ignition switch ON (II).
2. Check for IMA system Temporary DTCs or DTCs with the HDS.
Is DTC P0A7F (78) indicated?
YES - Do the troubleshooting for DTC P0A7F (78).
NO - Go to step 3.

3. Start the engine, and wait 1 minute.
4. Monitor the OBD STATUS for DTC P1446 (74) in the DTCs MENU with the HDS.
Does the screen indicate FAILED?
YES - Go to step 6.
NO - If the screen indicates PASSED, intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the battery module and the BCM module. If the screen indicates NOT COMPLETED, go to step 1 and recheck.

5. Record the value of IMA BATTERY MODULE 1 VOLTAGE through IMA BATTERY MODULE 11 VOLTAGE in the DATA LIST with the HDS.
6. Turn the ignition switch OFF.
7. Turn the battery module switch OFF.
8. Remove the IPU lid.
9. Turn the ignition switch ON (II).
10. Disconnect BCM module connector B (14P).
11. Measure voltage between the following BCM module connector terminals, then compare those values with the IMA BATTERY MODULE 1 VOLTAGE through IMA BATTERY MODULE 11 VOLTAGE in the DATA LIST with the HDS.
^ B6 and B14, compared to IMA BATTERY MODULE 1 VOLTAGE
^ B14 and B9, 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 measurements and the DATA LIST measurements?
YES - Go to step 20.
NO - Replace the battery module, then go to step 12.

12. Turn the ignition switch OFF.
13. Reconnect all connectors.
14. Reinstall the IPU lid, then turn the battery module switch ON.
15. Turn the ignition switch ON (II).
16. Reset the BCM module with the HDS.
17. Start the engine, and wait 1 minute.
18. Check for IMA system Temporary DTCs or DTCs with the HDS.
Are any Temporary DTCs or DTCs indicated?
YES - If DTC P1446 is indicated, check for poor connections or loose terminals at the battery module 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 19.

19. Monitor the OBD STATUS for DTC P1446 (74) 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 battery module and the BCM module, then go to step 1. If the screen indicates NOT COMPLETED, go to step 17 and recheck.

20. Reinstall the IPU lid, then turn the battery module switch ON.
21. Update the BCM module if it does not have the latest software, or substitute a known-good BCM module.
22. Start the engine, and wait 1 minute.
23. Check for IMA system Temporary DTCs or DTCs with the HDS.
Is DTC P1446 (74) indicated?
YES - Check for poor connections or loose terminals at the battery module and the BCM module. If the BCM module was updated, substitute a known-good BCM module, then go to step 22. If the BCM module was substituted, go to step 1.
NO - If no Temporary DTCs or DTCs are indicated, go to step 24. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.

24. Monitor the OBD STATUS for DTC P1446 (74) 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 battery module and the BCM module, then go to step 1. If the screen indicates NOT COMPLETED, go to step 22.