DTC 23

DTC P1586 (23): Battery Current Sensor Signal Malfunction
1. Turn the ignition switch ON (II).
2. Check for IMA system Temporary DTCs or DTCs with the HDS.
Are any DTCs except DTC P1586 (23) and P0A7F (78) indicated?
YES - Do the troubleshooting for the indicated DTC.
NO - Go to step 3.

3. Test-drive the vehicle under wide open throttle for at least 2 seconds, then decelerate with light braking.
4. Monitor the OBD STATUS for DTC P1586 (23) in the DTCs MENU with the HDS.
Does the screen indicate FAILED?
YES - Go to step 5.
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 current sensor and the BCM module. If the screen indicates NOT COMPLETED, go to step 3 and recheck.

5. Turn the ignition switch OFF.
6. Turn the battery module switch OFF.
7. Remove the IPU lid.
8. Remove the BCM module, then check the battery current sensor and the junction board 12P connector connection.
Is the connection OK?
YES - Go to step 10.
NO - Repair the connection, then go to step 15.

9. Disconnect BCM module connector A (40P).
10. Check for continuity between body ground and BCM module connector terminal A16 and A36 individually.





Is there continuity?
YES - Go to step 11.
NO - Go to step 13.

11. Disconnect the junction board 12P connector.
12. Check for continuity between body ground and BCM module connector terminals A16 and A36 individually.





Is there continuity?
YES - Repair short in the wire between the BCM module A16, A36) and the junction board 12P connector, then go to step 15,
NO - Replace the battery module, then go to step 15.

13. Disconnect the junction board 12P connector.
14. Check for continuity between these terminals:
Junction board 12P connector terminal No. 3 and BCM module connector terminal A16. Junction board 12P connector terminal No. 4 and BCM module connector terminal A36.





Is there continuity?
YES - Replace the battery module, then go to step 23.
NO - Repair open in the wire between the BCM module (A16, A36) and the junction board 12P connector, then go to step 15.

15. Turn the ignition switch OFF.
16. Reconnect all connectors.
17. Reinstall the IPU lid, then turn the battery module switch ON.
18. Turn the ignition switch ON (II).
19. Reset the BCM module with the HDS.
20. Test-drive the vehicle under wide open throttle for at least 2 seconds, then decelerate with light braking.
21. Check for IMA system Temporary DTCs or DTCs with the HDS.
Are any Temporary DTCs or DTCs indicated?
YES - If DTC P1586 (30) is indicated, check for poor connections or loose terminals at the battery current sensor 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 22.

22. Monitor the OBD STATUS for DTC P1586 (30) 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 current sensor and the BCM module, then go to step 1. If the screen indicates NOT COMPLETED, go to step 21 and recheck.

23. Reinstall the IPU lid, then turn the battery module switch ON.
24. Update the BCM module if it does not have the latest software, or substitute a known-good BCM module.
25. Test-drive the vehicle under wide open throttle for at least 2 seconds, then decelerate with light braking.
26. Check for IMA system Temporary DTCs or DTCs with the HDS.
Is DTC P1586 (23) indicated?
YES - Check for poor connections or loose terminals at the battery current sensor and the BCM module. If the BCM module was updated, substitute a known-good BCM module, then go to step 25. If the BCM module was substituted, go to step 1.
NO - If no Temporary DTCs or DTCs are indicated, go to step 27. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.

27. Monitor the OBD STATUS for DTC P1586 (23) 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 current sensor and the BCM module, then go to step 1. If the screen indicates NOT COMPLETED, go to step 25.