VOLVO
CEM-B110D87 - Rear door passenger side power child locking motor. Bus Signal / Message Failures. Missing message
System
Central Electronic Module (CEM)
Volvo models this fault code applies to
Applies to the following models:
2 modelsV40 (2013–), V40 Cross Country (2013–)
Show models by year and engine (2)
What does this fault code mean?
The child lock in the passenger side rear door sends no message to the CEM, so the control module gets no information from the function. The child lock then does not work, and a yellow warning symbol with a text message may appear in the display.
Possible causes
- Damaged switch that shows the lock motor position
- The lock motor is stuck
What you can do
- 1If you have a diagnostic tool: read the fault codes in the driver and passenger door modules (DDM and PDM)
- 2Turn the child lock on with the driver door switch and check that the passenger side rear door then cannot be opened from inside
- 3Check that the fuse for the right rear door module is intact. Use a multimeter to check the wire is not shorted to ground before replacing a fuse
- 4Look for chafing and pinch damage in the wiring to the rear door and check that the connectors are secure
- 5If the fault returns, have a workshop with diagnostic equipment check the bus and the control modules
Symptoms you may notice2
- Child lock in the passenger side rear door does not work
- Yellow warning symbol and text message in the display
General guidance for car owners. Diagnosis on the car can point to a different cause.