P1569

DTC P1569 (70): Battery Cell Temperature Signal Circuit Problem
1. Reset the MCM.
2. Turn the ignition switch ON (II).
Is DTC P1569 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 at the MCM.
3. Turn the ignition switch OFF.
4. Turn the battery module switch OFF.
5. Remove the IPU lid.
6. Disconnect MCM connector E (22P) and the battery module 6P connector.





7. Check for continuity between MCM connector terminal E10 and battery module 6P connector terminal No. 1.
Is there continuity?
YES-Go to step 8.
NO-Repair open in the wire between the battery module and the MCM (E10).




8. Check for continuity between MCM connector terminal E9 and battery module 6P connector terminal No. 2.
Is there continuity?
YES-Go to step 9.
NO-Repair open in the wire between the battery module and the MCM E9).





9. Check for continuity between MCM connector terminal E10 and body ground.
Is there continuity?
YES-Repair short in the wire between the battery module and the MCM (E10).
NO-Go to step 10.





10. Check for continuity between MCM connector terminal E9 and body ground.
Is there continuity?
YES-Repair short in the wire between the battery module and the MCM (E9).
NO-Go to step 11.
11. Reconnect MCM connector E (22P).





12. Connect battery module 6P connector terminals No. 1 and No. 2 with a jumper wire.





13. Measure voltage between MCM connector terminal E10 and body ground.
Is there about 2 - 3 V?
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.