DTC 64

DTC 64: BCM Module Communication Signal Circuit Problem

NOTE: Information marked with an asterisk (*) applies to BATTSCI 2 line.

1. Reset the MCM.
2. Turn the ignition switch ON (II).
Is DTC 64 indicated?
YES- Go to step 3.
NO- Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the BCM 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 C (31P) and BCM module connector A (26P).





7. Check for continuity between body ground and MCM connector terminals C22 and C21 individually.
Is there continuity?
YES- Repair short to ground in the wire between the MCM (C22 or C21) or the BCM module (A20 or A7).
NO- Go to step 8.





8. Check for continuity between BCM module connector terminal A20 and MCM connector terminal C22, BCM module connector terminal A7 and MCM connector terminal C21.
Is there continuity?
YES- Substitute a known-good MCM and BCM module and recheck. If the symptom/indication goes away, replace the original MCM and BCM module.
NO-Repair open in the wire between the MCM (C22, C21*) and the BCM (A20, A7 *.)