VOLVO
AEM-4F60 - Back-up (reversing) warning system. Signal too low. Permanent fault
System
Accessory Electronic Module (AEM)
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 AEM has detected a signal that is too low on the supply to the reversing warning system while reverse is selected. The fault is permanent and switches the reversing warning off until the ignition is next switched on. The cause is usually a short to ground in the supply wire or a faulty warning unit.
Possible causes
- Power supply wire to the reversing warning system shorted to ground
- Faulty reversing warning system
What you can do
- 1Check that the reversing warning works when reverse gear is selected
- 2Follow the supply wire to the reversing warning system and look for chafing or damage
- 3Check the connectors at the reversing warning system for oxidation and damage
- 4If the fault remains, have a workshop check the warning system after checking the wiring
Symptoms you may notice1
- Reversing warning system does not work
What the fault can affect1
- Reversing warning is disabled until the next ignition cycle
General guidance for car owners. Diagnosis on the car can point to a different cause.