Rendezvous AWD V6-3.6L VIN 7 (2004)
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customer will hear a demo message stating that there is not a current OnStar(R) subscription for the vehicle. The message will also instruct the
customer how to upgrade and reactivate services.
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OnStar(R) personal calling (OPC) will not be available, as this feature requires the customer to have a current OnStar(R) account. Attempts to use
this feature will result in cellular connection failure messages and the inability to connect to the number dialed.
Note
For deactivated vehicles, a no connect response should be considered normal system operation. Further diagnosis and subsequent repair is only necessary
should the customer elect to become an active OnStar(R) subscriber and upgrade the account subscription.
OnStar(R) Cellular, GPS, and Diagnostic Limitations
The proper operation of the OnStar(R) System is dependent on several elements outside the components integrated into the vehicle. These include the
National Cellular Network Infrastructure, the cellular telephone carriers within the network, and the GPS.
The cellular operation of the OnStar(R) system may be inhibited by factors such as the users range from a digital cellular tower, the state of the cellular
carrier's equipment, and the location where the call is placed. Making an OnStar(R) key press in areas that lack sufficient cellular coverage or have a
temporary equipment failure will result in either the inability of a call to complete with a data transfer or the complete inability to connect to the
OnStar(R) Call Center. The OnStar(R) system may also experience connection issues if the identification numbers for the module, station identification
number (STID), electronic serial number (ESN) or manufacturers electronic ID (MEID), are not recognized by the cellular carriers local signal receiving
towers.
The satellites that orbit earth providing the OnStar system with GPS data have almost no failures associated with them. In the event of a no GPS concern,
the failure will likely lie with the inability of the system to gain GPS signals because of its location, i.e. in a parking structure, hardware failure, or being
mistaken with an OnStar(R) call which has reached the Call Center without vehicle data.
During diagnostic testing of the OnStar(R) system, the technician should ensure the vehicle is located in an area that has a clear unobstructed view of the
open sky, and preferably, an area where digital cellular calls have been successfully placed. These areas can be found by successfully making an
OnStar(R) keypress in a known good OnStar(R) equipped vehicle and confirming success with the OnStar(R) Call Center advisor. Such places can be
used as a permanent reference for future OnStar(R) testing.
Mobile Identification Number and Mobile Directory Number
The vehicle communication interface module (VCIM) utilizes 2 numbers for cellular device identification, call routing and connection.
They are:
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A mobile identification number (MIN)
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A mobile directory number (MDN)
Note
The MIN represents the number used by the cellular carrier for call routing purposes. The MDN represents the number dialed to reach the cellular
device.
Diagnostic Information
Symptoms - Cellular Communication
The following steps must be completed before using the symptom table.
1. Perform the Diagnostic System Check - Vehicle, before using the Symptom Tables in order to verify that the following are true:
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There are no DTCs set.
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The control modules can communicate via the serial data link.
2. Review the system operation in order to familiarize yourself with the system functions. Refer to Radio/Audio System Description and Operation in SI.
Diagnostic Starting Point - Displays and Gages
Begin the displays and gages system diagnosis with Diagnostic System Check - Vehicle or the audible warning system diagnosis with Diagnostic System
Check - Vehicle. The Diagnostic System Check will provide the following information: