VOLVO
CEM-2FA5 - Passenger seatbelt lock. Signal too low. Intermittent fault
System
Central Electronic Module (CEM)
Volvo models this fault code applies to
Applies to the following models:
4 modelsS60 (2001–2009), S80 (1999–2006), V70 (2000–2008), V70 XC / XC70 (2001–2007)
Show models by year and engine (4)
What does this fault code mean?
The CEM registers too low a signal, or no signal, from the passenger's seat belt buckle. The fault is intermittent, so it may have occurred before without being active now. The cause may be a short to ground, a break in wires or connectors, or a blown fuse. The SRS warning lamp may light.
Possible causes
- A short to ground or an open circuit in the wiring or connectors to the passenger's seat belt buckle
- The fuse for the seat belt system has blown
What you can do
- 1Safety: the seat belt system is part of the crash protection. Do not work on the seat belt buckle wiring yourself; have a workshop check it
- 2Check the fuse for the seat belt system. If it has blown, replace it once. If it blows again, have a workshop trace the wiring fault
- 3Look for chafed or pinched cables at the passenger's buckle, without removing anything. If you find one, have a workshop fix it
- 4With a diagnostic tool, read the fault code after switching the ignition off and on, and see whether it returns
- 5After the work, clear the code and check that the SRS warning lamp goes out
Symptoms you may notice1
- The SRS warning lamp is lit
General guidance for car owners. Diagnosis on the car can point to a different cause.