DTC U0028-87: Communication Error With Rear Body Control Module (RBCM): Notes

WARNING: This page is about a different car, the 2016 Mazda CX-5. However, it is still accessible from the selected car via links, so may be relevant.

System malfunction location	Communication error with rear body control module (RBCM)
Detection condition	Start stop unit detects communication error with rear body control module (RBCM) 10 times continuously .
Fail-safe	-
Possible cause	Rear body control module (RBCM) connector or terminal malfunction Start stop unit connector or terminal malfunction Short to ground in wiring harness between start stop unit terminal 1Q and rear body control module (RBCM) terminal 3B Open circuit in wiring harness between start stop unit terminal 1Q and rear body control module (RBCM) terminal 3B Rear body control module (RBCM) malfunction Start stop unit malfunction