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Home >> Mazda >> 2016 >> CX-9 Touring, AWD >> Repair and Diagnosis >> Body & Frame >> Door Locks >> On-Board Diagnostic - Start Stop Unit >> DTC U0028-87: Communication Error With Rear Body Control Module (RBCM) >> Notes

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

Description  Communication error with rear body control module (RBCM)
Detection condition 
  • Start stop unit detects the communication error with rear body control module (RBCM) 10 times continuously.
Fail-safe 
  • Performs control with the driver's side door and liftgate open.
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
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