VOLVO
CEM-9C02 - Antenna / light ring. Short-circuit to ground
System
Central Electronic Module (CEM)
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 CEM has detected that the supply to the light ring around the ignition switch is shorted to ground. The fault is normally not noticed by the driver, since the light ring only lights when the car is unlocked.
Possible causes
- Light ring around the ignition switch shorted to ground
What you can do
- 1Unlock the car with the interior lighting active and check that the light ring lights, since the fault can only be tested then
- 2Use a multimeter to check that the supply wire to the light ring has no contact with ground (the body) with the ignition off
- 3Look for chafing or damage on the wire around the ignition switch where it may have touched the body
- 4Clear the code once the repair is done and check that it does not come back
- 5If the fault returns, have a workshop repair the wire
Symptoms you may notice1
- No noticeable symptoms for the driver
What the fault can affect1
- If the fault has been present for a long time, the output to the light ring is switched off until the code is cleared
General guidance for car owners. Diagnosis on the car can point to a different cause.