Lighting - Headlamp Condensation Diagnosis
SI B 63 04 08
Lights
November 2009
Technical Service
This Service Information bulletin supersedes SI B63 04 08 dated June 2008.
[NEW] designates changes to this revision
SUBJECT
Headlamp Moisture: Fault Diagnostics
MODEL
[NEW] All models
SITUATION
There is water or condensation in one or both headlamps.
[NEW] INFORMATION
Under some environmental conditions, condensation can occur without there being a faulty headlamp. A comprehensive test plan that will allow an
accurate diagnosis and repair is available. Follow the relevant test plan in diagnostics, using the latest ISTA diagnosis version. Select "Information
search" and the test plan may be accessed in two ways:
1. Using the "Text search" tab, select "Search for document title" and search using the term "Headlight fogging".
2. Using the "Function structure" tab, select "Body Mechanism, noises, optical element; leaks Water ingress Headlight fogged on inside Start
search ".
Note that a Diagnosis Code will be produced at the end of the test module. Be sure to include the code in the "Comments" section of the warranty
