VOLVO
CEM-U051587 - Keyless vehicle. Bus Signal / Message Failures. Missing message
System
Central Electronic Module (CEM)
Volvo models this fault code applies to
Applies to the following models:
7 modelsS60 (2011–), S80 (2007–), V60 (2011–), V60 Cross Country (2015–), V70 (2008–), XC60 (2009–), XC70 (2008–)
What does this fault code mean?
The fault code means that the answer from the keyless vehicle module (KVM) is missing when a passive start attempt is made. The fault may lie in the CAN network, the remote key or the KVM. The car may then not start with the keyless function, and a message can show in the display.
Possible causes
- Contact resistance or oxidation in the connections
- Internal fault in the remote key
- Internal fault in the keyless vehicle module (KVM)
- Open circuit in the CAN network
What you can do
- 1Read the fault codes in CEM. If code CEM-U021400 is also set, trace that one first, since the two are linked
- 2Have a workshop download new software to the KVM, then check whether the car can be started keylessly
- 3Replace the KVM only if the workshop finds an internal fault in it after the update
- 4After the repair, check that the car starts keylessly and that the fault code does not come back
Symptoms you may notice2
- Starter motor does not turn over
- Message in the information display
General guidance for car owners. Diagnosis on the car can point to a different cause.