VOLVO
UEM-0037 - Front right 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 the control signal to the front right reading lamp. It is set when that signal is faulty, either while the front lamp is lit and the rear lamp is off, or vice versa. It is also set if the connection to the roof lamp control unit is not making proper contact. UEM-0035 and UEM-0039 are usually stored along with this code.
Possible causes
- Open circuit in the signal wire for the front right reading lamp
- Short to voltage on the signal wire for the front right reading lamp
- The connection to the roof lamp control unit is not making proper contact
What you can do
- 1Check that the bulb is intact.
- 2Check the connectors to the upper electronic module and the roof lamp for contact resistance, oxidation and loose contacts.
- 3Correct the connectors where needed and check that they sit firmly afterwards.
- 4With a multimeter you can check that the wire between the upper electronic module and the roof lamp is not broken and has no contact with voltage.
- 5If the fault remains, have a workshop check the roof lamp and the wire.
Symptoms you may notice1
- Passenger compartment lighting does not work
What the fault can affect1
- The front right lamp goes out
General guidance for car owners. Diagnosis on the car can point to a different cause.