VOLVO
CEM-4F49 - Seat belt buckle, rear left-hand. Signal too high
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?
The CEM monitors the left rear belt buckle. If the voltage in the signal wire is too high, the code is set. The information lamp may light and a message may appear in the display.
Possible causes
- A short to supply voltage in the signal wire between the buckle and the CEM
- A short to supply voltage in the connector
- A short inside the seat belt buckle
- Cross-connected signal wires between the buckle and the CEM
What you can do
- 1Safety: the seat belt system is part of the crash protection. Do not work on the wiring or the buckle yourself. Have a workshop check the wires
- 2Look for chafed or pinched cables at the rear left seat belt, without removing anything
- 3Latch and unlatch the belt several times and see whether the information lamp changes
- 4After the work, clear the code and check that the information lamp goes out
Symptoms you may notice2
- The information lamp is lit
- A message appears in the display
General guidance for car owners. Diagnosis on the car can point to a different cause.