Global Positioning System Module: Service and Repair

Telematic Control Module -J499- - Jetta Wagon, Golf & GTI, Removing And Installing

NOTE:
- If the telematic control module is replaced, the OnStar (R) system needs to be reconfigured.







- DO NOT exchange Telephone/Telematic Control Modules between vehicles. Each module contains specific Station Identification (STID) and Electronic Serial Number (ESN) data unique to the VIN. This data is used by OnStar (R) and National Cellular Telephone Network to identify the vehicle and administer the customer's account.
- Using the VAS 5051 Vehicle Diagnostic Testing and Information system in operating mode "Guided Fault Finding, and function "-J499- Telematic control module, replacing" it is possible to read the telematic control module coding from the existing module before removal. Note code prior to removal in order input code into replacement control module.

Removing

Before beginning repairs on the electrical system, disconnect battery.

- Remove luggage compartment floor panel (Jetta Wagon) or carpet mat (Golf & GTI).







- Jetta Wagon: remove both storage trays -arrows-.







- Lift and remove tool/jack set insert in direction of -arrow-.







- Remove screw -arrow- from plastic retainer.
- Lift retainer as far as the electrical harness allows.
- Remove lower part of retainer base plate and remove telematic control module.
- First disconnect 42-pin connection from control module, as follows:







- Depress clip -arrow1- and slide locking lever in direction of -arrow2-.
- Then disconnect antenna cable connections from control module.

Installing
Install in reverse order of removal, noting the following:







- When reinstalling plastic retainer, first insert/lay into spare tire well as illustrated.
- Then, slide retainer forward (in direction of -arrow-) until the screw hole in the retainer lines up with the threaded insert underneath.
- Insert screw into screw hole in retainer and tighten.

If telematics control module was replaced:
- Code telematics control module.
- Reconfigure telematics system for OnStar (R) functions.