Electrical - Erroneous/Unrelated DTC's in ECM
NUMBER: 08-028-06GROUP: Electrical
DATE: June 17, 2006
SUBJECT:
Erroneous and/or unrelated DTC's in the Engine Control Module (ECM) or ABS/ESP control module
MODELS:
2002 - 2006 (VA) Sprinter
DISCUSSION:
A burned out or incorrect type brake light bulb could result in unrelated DTC's in the ECM or ABS/ESP control module. Also corrosion in the trailer tow connector as well as on a tail light circuit board may cause similar erroneous and/or unrelated DTC's.
When confronted with unexplained DIG's that affect various modules a technician should perform some preliminary checks to diagnose the condition.
^ Perform an individual function test of each bulb in the tail lamp assemblies. Then proceed with functional tests of the license plate lights, cargo lights and dome lamps.
^ Check all brake light bulbs and verify that they are of the correct type (P21/5W - 12V 21/5W). The brake and park light are part of the same bulb. An incorrect type bulb may bridge these two circuits.
^ Assure that there are no broken filaments and that the sockets are free of any corrosion. Verify there are no bent connectors or conductors.
^ Inspect all wiring for damage and proper routing.
^ Inspect trailer tow connector and look for any damage or corrosion.
^ If all of the above check out OK, refer to the existing diagnostic procedure available in TechCONNECT under: Service > Diagnostics > Chassis > 7.0 > 7.1 > 7.1.5.
POLICY:
Information Only
Disclaimer:
This bulletin is supplied as technical information only and is not an authorization for repair.