P1629

DTC P1629 (79): Battery Current Sensor Circuit Malfunction
1. Turn the ignition switch ON (II).
2. Check the BATTERY CURRENT SENSOR SUPPLY VOLTAGE in the DATA LIST with the HDS.
Is there less than 0.5 V?
YES - Go to step 3.
NO - 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.

3. Turn the ignition switch OFF.
4. Turn the battery module switch OFF.
5. Remove the IPU lid.
6. Disconnect the junction board 12P connector.
7. Turn the ignition switch ON (II).
8. Check the BATTERY CURRENT SENSOR SUPPLY VOLTAGE in the DATA LIST with the HDS.
Is there less than 0.5 V?
YES - Go to step 9.
NO - Replace the battery module, then go to step 12.

9. Turn the ignition switch OFF.
10. Disconnect BCM module connector A (40P).
11. Check for continuity between BCM module connector terminal A5 and body ground.





Is there continuity?
YES - Repair short to ground in the wire between the junction board 12P connector and the BCM module (A5), then go to step 12.
NO - Go to step 18.

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. Check for IMA system Temporary DTCs or DTCs with the HDS.
Are any Temporary DTCs or DTCs indicated?
YES - If DTC P1629 (79) 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 - Troubleshooting is complete.

18. Reinstall the IPU lid, then turn the battery module switch ON.
19. Update the BCM module if it does not have the latest software, or substitute a known-good BCM module.
20. Check for IMA system Temporary DTCs or DTCs with the HDS.
Is DTC P1629 (79) 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 recheck. If the BCM module was substituted, go to step 1.
NO - 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 are indicated, go to the indicated DTC's troubleshooting.