Global Positioning System Display Unit: Service and Repair

Telematics

Telematics Control Head

The Telematics Control Head is located in the front interior light module.

• In the event any of the OnStar(R) control buttons are either inadvertently or deliberately pressed for longer than 15 seconds, the OBD program assumes a button is sticking. The red status light will come on and a DTC loads in memory. Use Vehicle Diagnostic Testing and Information System (VAS 5051) in mode "Guided Fault Finding". Check DTC memory for DTC 01526 "mechanical malfunction. Inform customers accordingly.

• A faulty control button cannot be replaced separately. Replace complete Telematics control head.

Removing

CAUTION!
• Activate Telematics Service Mode => [ Telematics Service Mode, Activating and Deactivating ] Description and Operation

CAUTION!
• Switch off all electrical components.

• Switch off ignition and remove ignition key.

- Remove Front Interior Light (W1).

- Disconnect electrical connection - 1 - and unclip it from the retainer - 2 -.





- On the front side of Front Interior Light (W1), unclip the Telematics Control Head (E264) from retainer - arrow 2 - and swivel the Telematics Control Head (E264) upward out of Front Interior Light (W1) - arrow 1 -.

Installing

- Install in reverse order.

- Deactivate Telematics Service Mode => [ Telematics Service Mode, Activating and Deactivating ] Description and Operation.