VOLVO
CEM-B1D3524 - Hazards Switch Connection Circuit. General Signal Failures. Signal stuck high
System
Central Electronic Module (CEM)
Volvo models this fault code applies to
Applies to the following models:
7 modelsS60 (2011–), S80 (2007–), V60 (2011–), V60 Cross Country (2015–), V70 (2008–), XC60 (2009–), XC70 (2008–)
What does this fault code mean?
The central electronic module (CEM) monitors the signal from the hazard warning switch. The code is set when the signal stays high for too long, that is, when the switch has been activated for too long.
Possible causes
- The hazard warning switch is stuck in the active position
- Damaged switch
What you can do
- 1Read and clear the code and check whether it comes back
- 2Switch the hazard lights on and off and see whether the switch returns to off
- 3If you have a diagnostic tool, read the live data for the switch and check that the value changes when you press it
- 4Check that the connectors at the switch are fully seated and free from oxidation
- 5Have a workshop replace the switch if it sticks
Symptoms you may notice1
- Hazard warning lights, malfunction
General guidance for car owners. Diagnosis on the car can point to a different cause.