S40 2.4i L5-2.4L VIN 38 B5244S4 (2008)
Trailer Lamps: Technical Service Bulletins
Lighting Erratic Lamp Operation With Trailer Hooked Up
TIE - Technical Journal
Title TRM: Caravan and Trailer with LED light
Ref No US21297.2.0 en-GB
Issuer -
Partner 3 US 7510 Volvo Cars North America
Func Group 8920
Func Desc recovery and towing unit
Status Released
Status Date 2010-12-07
Issue Date 2010-12-03
Reference
Attachment
Vehicle Type
CSC
DTC
Text
CSC = Customer Symptom Code
If using a printed copy of this document, always check for the latest online version.
DESCRIPTION:
The customer may complain about the vehicle lighting operation after connecting a trailer equipped with Light Emitting Diode (LED) lamps.
The vehicle trailer module (TRM) is designed to operate with incandescent trailer bulb systems only.
Some trailers are using light emitting diodes (LED) instead of incandescent bulbs. This can cause disturbances depending on trailer.
The following issues are those most likely to be identified by the customer:
- The LED lamps on the trailer will pulse when the vehicle is being driven with the trailer/caravan attached
- The rear park assist sensors are not disabled and a constant tone is heard.