VOLVO
CEM-6F51 - Tailgate handle. Faulty signal
System
Central Electronic Module (CEM)
Volvo models this fault code applies to
Applies to the following models:
5 modelsC30 (2007–2013), C30 Electric (2011–2013), C70 (2006–2013), S40 (2004–2013), V50 (2004–2013)
What does this fault code mean?
CEM checks the tailgate lock motor through a directly connected wire. If the control unit registers that the supply wire to the lock motor is broken or short-circuited to voltage, the fault code is set and the tailgate cannot be locked or unlocked.
Possible causes
- Open circuit in the supply wire between the CEM and the tailgate lock motor
- Supply wire to the tailgate lock motor short-circuited to voltage
What you can do
- 1With the ignition off, check the wire to the tailgate lock motor for chafing, pinching and loose connections
- 2Check the connector at the tailgate lock motor for corrosion and loose connections
- 3Use a multimeter to check that the supply wire has no break and no contact with voltage
- 4Remedy what is found and then clear the fault code
Symptoms you may notice1
- Tailgate does not lock or unlock
General guidance for car owners. Diagnosis on the car can point to a different cause.