Lighting - Headlight Range Control Warning ON
90 Headlight range control warning on94 10 35
2018108/3
August 13, 2010
Supersedes Technical Service Bulletin Group 94 number 08-20 dated November 6, 2008 for reasons listed below.
Affected Vehicles
CONDITION
^ After engine start, the warning light for the headlight range control may come on and remain illuminated.
^ While driving, the warning light for the headlight range control may flash.
^ DTC 01316 is stored in the memory of the vertical headlight aim control (address word 55).
^ DTC 01317 (Control unit in the dash insert -J285 no signal/communication sporadic) is stored sporadically in the vertical headlight range control memory.
^ No DTCs are stored in the brake electronics control unit, and no brake-related DTCs are stored in the ECM or TCM. The ESP warning light does not come on.
^ The headlight function is not affected.
TECHNICAL BACKGROUND
An overly sensitive time-out detection triggers the briefly activated warning light and the sporadic data entry in the 55 - memory.
PRODUCTION SOLUTION
Modified control units with software version S004 and higher.
SERVICE
1. Perform the self-diagnosis, and check the software version of the control unit.
2. Replace control units with a software version below S004.
WARRANTY
ADDITIONAL INFORMATION
All parts and service references provided in this TSB are subject to change and/or removal. Always check with your Parts Department and service manuals for the latest information.