VOLVO
UEM-0031 - Rear left reading lamp. Signal missing
System
Upper Electronic Module (UEM)
Volvo models this fault code applies to
Applies to the following models:
5 modelsS60 (2001–2009), S80 (1999–2006), V70 (2000–2008), V70 XC / XC70 (2001–2007), XC90 (2003–)
What does this fault code mean?
The code concerns a faulty control signal from the rear left lamp circuit. It is set both while the rear left reading lamp shines and while it is off, while the front left lamp is in the opposite state. The cause can be a blown bulb, a break, or a short to voltage in the signal wire.
Possible causes
- Blown bulb
- Open circuit on the signal wire for the rear left reading lamp
- Short to voltage on the signal wire for the rear left reading lamp
What you can do
- 1Check that the bulb is intact.
- 2Read off the code, clear it and check whether it returns.
- 3Check that the connectors to the upper electronic module and the lamp are firmly seated and not oxidised.
- 4Use a multimeter to check that the wire running from the upper electronic module to the rear left reading lamp is not broken.
- 5If the fault remains, have a workshop check and correct the wire.
Symptoms you may notice1
- Passenger compartment lighting does not work
What the fault can affect1
- The rear left reading lamp goes out
General guidance for car owners. Diagnosis on the car can point to a different cause.