DTC Troubleshooting
DTC Troubleshooting: P1629 (79)
DTC P1629 (79):
Battery Current Sensor Circuit Malfunction
NOTE: Before you troubleshoot, record all freeze data, and review the general troubleshooting information Initial Inspection and Diagnostic Overview.
1. Turn the ignition switch to ON (II).
2. Check the BATTERY CURRENT SENSOR SUPPLY VOLTAGE in the DATA LIST with the HDS.
Is there less than 4.0 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 to LOCK (0).
4. Turn the battery module switch OFF High Voltage Safety.
5. Remove the IPU lid IPU Lid Removal/Installation.
6. Disconnect the junction board 12P connector.
7. Turn the ignition switch to ON (II).
8. Check the BATTERY CURRENT SENSOR SUPPLY VOLTAGE in the DATA LIST with the HDS.
Is there less than 4.0 V?
YES -
Go to step 9.
NO -
Replace the battery module Service and Repair, then go to step 12.
9. Turn the ignition switch to LOCK (0).
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 13.
NO -
Go to step 19.
12. Turn the ignition switch to LOCK (0).
13. Reconnect all connectors.
14. Reinstall the IPU lid IPU Lid Removal/Installation, then turn the battery module switch ON High Voltage Safety.
15. Turn the ignition switch to ON (II).
16. Clear the DTC with the HDS Initial Inspection and Diagnostic Overview.
17. Check for Pending or Confirmed 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, then go to step 1.
NO -
Go to step 18.
18. Monitor the OBD STATUS for DTC P1629 (79) in the DTCs MENU with the HDS.
Does the screen indicate PASSED?
YES -
Troubleshooting is complete. If any other Pending or Confirmed DTCs were indicated in step 17, go to the indicated DTC's troubleshooting.�
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, keep the ignition switch ON (II) until a result comes on.
19. Reinstall the IPU lid IPU Lid Removal/Installation, then turn the battery module switch ON High Voltage Safety.
20. Update the BCM module if it does not have the latest software Testing and Inspection, or substitute a known-good BCM module Initial Inspection and Diagnostic Overview.
21. Check for Pending or Confirmed 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 Initial Inspection and Diagnostic Overview, then recheck. If the BCM module was substituted, go to step 1.
NO -
Go to step 22.
22. Monitor the OBD STATUS for DTC P1629 (79) 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 Service and Repair. If any other Pending or Confirmed DTCs were indicated in step 21, go to the indicated DTC's troubleshooting.�
NO -
If the screen indicates FAILED, 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 Initial Inspection and Diagnostic Overview, then recheck. If the BCM module was substituted, go to step 1. If the screen indicates NOT COMPLETED, keep the ignition switch ON (II) until a result comes on.