P1580

DTC P1580 (65): Battery Current Sensor Circuit Malfunction
1. Turn the ignition switch ON (II).
2. Reset the MCM.
3. Turn the ignition switch OFF, and wait 1 minute.
4. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P1580 indicated?
YES - Go to step 5.
NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the battery current sensor and the MCM.

5. Turn the ignition switch OFF.
6. Turn the battery module switch OFF.
7. Remove the IPU lid.
8. Turn the ignition switch ON (II).
9. Measure voltage between battery current sensor 3P connector terminals No. 1 and No. 3.





Is there 23 - 25 V?
YES - Go to step 10.
NO - Go to step 15.

10. Reset the MCM.
11. Turn the ignition switch OFF, and wait 1 minute.
12. Disconnect the battery current sensor 3P connector.
13. Turn the ignition switch ON (II).
14. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P1580 indicated?
YES - Go to step 34.
NO - Replace the battery current sensor, then go to step 26.

15. Turn the ignition switch OFF.
16. Disconnect the battery current sensor 3P connector.
17. Turn the ignition switch ON (II).
18. Measure voltage between battery current sensor 3P connector terminals No. 1 and No. 3.





Is there 23 - 25 V?
YES - Replace the battery current sensor, then go to step 26.
NO - Go to step 19.

19. Turn the ignition switch OFF.
20. Disconnect MCM connector A (31P).
21. Check for continuity between MCM connector terminal A9 and battery current sensor 3P connector terminal No. 1.





Is there continuity?
YES - Go to step 22.
NO - Repair open in the wire between the battery current sensor and the MCM (A9), then go to step 26.

22. Check for continuity between MCM connector terminal A8 and battery current sensor 3P connector terminal No. 3.





Is there continuity?
YES - Go to step 23.
NO - Repair open in the wire between the battery current sensor and the MCM (A8), then go to step 26.

23. Disconnect MCM connector A (31P).
24. Check for continuity between MCM connector terminal A9 and body ground.





Is there continuity?
YES - Repair short in the wire between the battery current sensor and the MCM W), then go to step 26.
NO - Go to step 25.

25. Check for continuity between MCM connector terminal A8 and body ground.





Is there continuity?
YES - Repair short in the wire between the battery current sensor and the MCM (A8), then go to step 26.
NO - Go to step 31.

26. Turn the ignition switch OFF.
27. Reconnect all connectors.
28. Reinstall the IPU lid, then turn the battery module switch ON.
29. Turn the ignition switch ON (II).
30. Reset the MCM.
31. Turn the ignition switch OFF, and wait 1 minute.
32. Turn the ignition switch ON (II).
33. Check for Temporary DTCs or DTCs with the HDS.
Are any Temporary DTCs or DTCs indicated?
YES - If DTC P1580 is indicated, check for poor connections or loose terminals at the battery current sensor and the MCM, 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.

34. Reinstall the IPU lid, then turn the battery module switch ON.
35. Update the MCM if it does not have the latest software, or substitute a known-good MCM.
36. Turn the ignition switch OFF, and wait 1 minute.
37. Check for Temporary DTCs or DTCs with the HDS.
Are any Temporary DTCs or DTCs indicated?
YES - If DTC P1580 is indicated, check for poor connections or loose terminals at the battery current sensor and the MCM, then go to step 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.
NO - If the MCM was updated, troubleshooting is complete. If the MCM was substituted, replace the original MCM.