Diagnostic Instructions
Circuit/System Description
The communication interface module has the capability of commanding the horn, initiating door lock/unlock, or operating the exterior lamps using the serial data circuits. These functions are commanded by the Call Center per a customer request.
Diagnostic Aids
The customer concern may have been due to a lack of cellular service in a given area. A failure in the Cellular Network infrastructure that has since been corrected.
Reference Information
Schematic Reference
Telematics Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Telematics Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References
for scan tool information
Circuit/System Verification
Important:
| • | It is necessary to inform the Call Center advisor that this call is for vehicle diagnostic purposes. |
| • | It is necessary to have the vehicle in an open outside area where a cellular call can be successfully placed and GPS data can be received from satellites. |
- Verify that the horn, lights, and the doors locks on the vehicle operate properly.
- Contact the Call Center by pressing the blue button. Verify with the call center advisor that all of the remote functions (door locks, lights, or horn) work.
| ⇒ | If the remote functions do not operate when requested, replace the communication interface module. |
Repair Instructions
Perform the
Diagnostic Repair Verification
.
Control Module References
for Communication Interface module replacement, setup, and programming
