VOLVO
REM-7A20 - Subwoofer X-feed, signal or temperature too high
System
Bakre elektronikk (REM)
Volvo-modeller feilkoden gjelder for
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1 modellXC90 (2003–)
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Hva betyr feilkoden?
The rear electronic module (REM) feeds the subwoofer module (SUB) through a driver stage. The fault is stored when the output is shorted to supply voltage, or when the driver stage overheats, and the module then switches the output off.
Mulige årsaker
- Signal cable shorted to supply voltage
- Internal fault in the rear electronic module (REM)
Hva du kan gjøre
- 1Read and note any other fault codes before clearing them, so a workshop can use them in its fault-finding
- 2With the ignition off, use a multimeter to check that the wiring between the REM and the subwoofer module (SUB) has no contact with supply voltage
- 3Look for damaged insulation on the wiring, which can cause intermittent or permanent short circuits
- 4If the fault remains, have a workshop with diagnostic equipment check the REM and the subwoofer
Symptomer du kan merke2
- Subwoofer output does not match the chosen setting
- No sound from the subwoofer
Hva feilen kan påvirke2
- The control module switches off the output to the subwoofer
- On cars built from late September 2005, the output is switched off permanently if the fault has been present over many ignition cycles, until the fault code is cleared
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