DTC 65

DTC P1580 (65): Battery Current Circuit Problem
1. Reset the MCM.
2. Turn the ignition switch OFF.
3. Turn the ignition switch ON (II).
Is DTC P1580 indicated?
YES - Go to step 4.
NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the battery current sensor and at the MCM.
4. Turn the ignition switch OFF.
5. Turn the battery module switch OFF.
6. Remove the IPU lid.
7. Turn the ignition switch ON (II).





8. Measure voltage between junction board 3P connector terminals No. 1 and No. 3.
Is there 24 V?
YES - Go to step 9.
NO - Go to step 13.
9. Turn the ignition switch OFF.
10. Disconnect the junction board 3P connector.
11. Reset the MCM.
12. Turn the ignition switch ON (II).
Is DTC P 1580 indicated?
YES - Update the MCM if it does not have the latest software, or substitute a known-good MCM, then recheck. If the symptom/indication goes away with a known-good MCM, replace the original MCM.
NO - Replace the battery module.
13. Turn the ignition switch OFF.
14. Disconnect the junction board 3P connector.
15. Turn the ignition switch ON (II).





16. Measure voltage between junction board 3P connector terminals No. 1 and No. 3.
Is there 24 V?
YES - Replace the battery module.
NO - Go to step 17.





17. Measure voltage between MCM connector terminals B16 and A23, and B24 and A23.
YES - Repair open in the wire between the battery module and the MCM (B16, B24).
NO - Go to step 18.
18. Turn the ignition switch OFF.
19. Disconnect MCM connector B (24P).





20. Check for continuity between body ground and MCM connector terminals B16 and B24 individually.
Is there continuity?
YES - Repair short in the wire between the battery current sensor end the MCM (B16, B24).
NO - Update the MCM if it does not have the latest software, or substitute a known-good MCM, then recheck. If the symptom/indication goes away with a known-good MCM, replace the original MCM.