VOLVO
CEM-6C4C - Steering column lock module (SCL). Signal too low
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 controls the supply voltage to the steering column lock control unit. The fault code is set when the supply wire is short-circuited to ground. The electronic steering lock then does not work, and the starter motor does not turn.
Possible causes
- Supply wire from the CEM to the steering column lock short-circuited to ground
What you can do
- 1If the starter motor does not turn, troubleshoot the starting system first, for example the battery and fuses
- 2Function test: take the key out and check that the steering lock locks and the wheel cannot be turned; insert the key and check that it releases
- 3With the ignition off, check the wires to the steering lock for chafing, pinching and loose connections
- 4Use a multimeter to check that the supply wire to the steering lock has no contact with ground (the body)
- 5If the lock does not work as it should after the repair, a workshop should replace the control module
Symptoms you may notice2
- Steering column lock does not lock or unlock
- Starter motor does not operate
General guidance for car owners. Diagnosis on the car can point to a different cause.