P1569

DTC P1569 (70): Battery Cell Temperature Signal Circuit Malfunction
1. Turn the ignition switch ON (II).
2. Check the PTC in the DATA LIST with the HDS.
Is about 0.2 V or less indicated?
YES - Go to step 3.
NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the battery module and the MCM.

3. Turn the ignition switch OFF.
4. Turn the battery module switch OFF.
5. Remove the IPU lid.
6. Disconnect MCM connector A (31P).
7. Disconnect the battery module 6P connector.
8. Check for continuity between MCM connector terminal A20 and battery module 6P connector terminal No. 1.





Is there continuity?
YES - Go to step 9.
NO - Repair open in the wire between the battery module and the MCM (A20), then go to step 16.

9. Check for continuity between MCM connector terminal A30 and battery module 6P connector terminal No. 2.





Is there continuity?
YES - Go to step 10.
NO - Repair open in the wire between the battery module and the MCM (A30), then go to step 16.

10. Check for continuity between MCM connector terminal A20 and body ground.





Is there continuity?
YES - Repair short in the wire between the battery module and the MCM (A20), then go to stop 16.
NO - Go to step 11.

11. Check for continuity between MCM connector terminal A30 and body ground.





Is there continuity?
YES - Repair short in the wire between the battery module and the MCM (A30), then go to step 16.
NO - Go to step 12.

12. Reconnect MCM connector A (31P).
13. Connect battery module 6P connector terminals No. 1 to No. 2 with a jumper wire.





14. Turn the ignition switch ON (II).
15. Check the PTC in the DATA LIST with the HDS.
Is about 0.2 V or less indicated?
YES - Go to step 22.
NO - Replace the battery module, then go to step 16.

16. Turn the ignition switch OFF.
17. Reconnect all connectors.
18. Reinstall the IPU lid, then turn the battery module switch ON.
19. Turn the ignition switch ON (II).
20. Reset the MCM.
21. Check for Temporary DTCs or DTCs with the HDS.
Are any Temporary DTCs or DTCs indicated?
YES - If DTC P1589 is indicated, check for poor connections or loose terminals at the battery module 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.

22. Reinstall the IPU lid, then turn the battery module switch ON.
23. Update the MCM if it does not have the latest software, or substitute a known-good MCM.
24. Check for Temporary DTCs or DTCs with the HDS.
Are any Temporary DTCs or DTCs indicated?
YES - If DTC P1589 is indicated, check for poor connections or loose terminals at the battery module 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.