VOLVO
REM-4F41 - Communication with parking assistance module (PAM). Signal missing
System
Rear Electronic Module (REM)
Volvo models this fault code applies to
Applies to the following models:
2 modelsS80 (1999–2006), XC90 (2003–)
Show models by year and engine (2)
What does this fault code mean?
The rear electronic module (REM) has a fault in its communication with the parking assistance module (PAM), and the code is set when this is registered. The back-up warning system does not work while the fault is present. The fault must be corrected and the code erased before any further fault tracing is done on the PAM and its components.
Possible causes
- Fault in the wiring or fuse for the power supply to the parking assistance module (PAM)
- Fault in the relay for the power supply to the parking assistance module (PAM)
- Fault in the wire linking the PAM with the rear electronic module (REM)
- Defective communication device in the parking assistance module (PAM)
- Defective communication device in the rear electronic module (REM)
What you can do
- 1Check whether the fuse for the back-up warning has blown
- 2Check that the connectors on the rear electronic module and the parking assistance module are secure and free from oxidation and damage
- 3Check that the 15I supply relay is in place in the rear electronic module
- 4Clear the fault code only once the fault has been put right, then check that the back-up warning works again
- 5If no fault is found, have a workshop try a new parking assistance module
Symptoms you may notice1
- The back-up warning system does not work
General guidance for car owners. Diagnosis on the car can point to a different cause.