Autologic Fix: Various electrical and communication faults
Feb. 8, 2016
The driver reports the vehicle's headlights were staying on, and/or other symptoms.
Brand: Volvo
Models: MY 2005-2007; S80, XC90, V70, XC70, S60
Symptoms: The driver reports the vehicle's headlights were staying on, even when removing the key from the ignition. Other symptoms include warning messages in the DIM display, warning lamps lit up in the DIM display, brake lights on permanently and a no-start condition.
Cause: Corrosion in the central electronic module (CEM)or connectors, due to water penetration through the plenum box past the sealing grommets. This produces a number of different functionality symptoms and DTCs to be set.
Fix:
Remove wiper arms
Remove plenum chambers
Remove wiper motor
Remove plenum box
Inspect the CEM and connectors for any water ingress
Replace the CEM and/or connectors with extension cables (as necessary)
Replace with a new modified plenum box and sealing grommets.
Parts needed:
Plenum box RHD
Rubber grommet
Central electronic module (CEM) (Only if necessary)
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