P1586

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

3. Reset the MCM.
4. Start the engine.
5. Check the BATTERY CURRENT SENSOR in the DATA LIST with the HDS.
Is there 0 A?
YES - Go to step 8.
NO - Go to step 6.

6. Start the engine, and hold it between 3,500 rpm and 4,000 rpm without load (in Park or neutral) until the IMA battery level gauge (BAT) displays at least three segments.
7. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P1586 indicated?
YES - Replace the battery current sensor, then go to step 17.
NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the battery current sensor and the MCM.

8. Turn the ignition switch OFF.
9. Turn the battery module switch OFF.
10. Remove the IPU lid.
11. Check the battery current sensor connection.
Is the connection OK?
YES - Go to step 12.
NO - Repair the connection, then go to step 18.

12. Disconnect MCM connector A (31P).
13. Check for continuity between body ground and MCM connector terminal A21.





Is there continuity?
YES - Go to step 14.
NO - Go to step 16.

14. Disconnect the battery current sensor 3P connector.
15. Check for continuity between body ground and MCM connector terminal A21.





Is there continuity?
YES - Repair short in the wire between the MCM (A21) and the battery current sensor, then go to step 17.
NO - Replace the battery current sensor, then go to step 17.

16. Check for continuity between battery current sensor 3P connector terminal No. 2 and MCM connector terminal A21.





Is there continuity?
YES - Go to step 24.
NO - Repair open in the wire between the MCM (A21) and the battery current sensor, then go to step 18.

17. Turn the ignition switch OFF.
18. Reconnect all connectors.
19. Reinstall the IPU lid, then turn the battery module switch ON.
20. Turn the ignition switch ON (II).
21. Reset the MCM.
22. Start the engine.
23. Check for Temporary DTCs or DTCs with the HDS.
Are any Temporary DTCs or DTCs indicated?
YES - If DTC P1586 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.

24. Reinstall the IPU lid, then turn the battery module switch ON.
25. Update the MCM if it does not have the latest software, or substitute a known-good MCM.
26. Start the engine.
27. Check for Temporary DTCs or DTCs with the HDS.
Are any Temporary DTCs or DTCs indicated?
YES - If DTC P1586 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.