| Table 1: | Vehicle Communication Interface Module Scan Tool Data Parameters |
| Table 2: | Vehicle Communication Interface Module Scan Tool Output Controls |
Parameter | System State | Expected Value | Definition |
|---|---|---|---|
Operating Conditions: Ignition ON | |||
Date | -- | Numeric | This displays DD/MM/YYYY. This is the date the VCIM was manufactured. |
GPS Signal | -- | Yes | The scan tool displays Yes or No. Yes is displayed if there is a GPS signal received by the VCIM. |
Signal Strength | -- | Varies | This displays a calculated value for cellular reception signal strength. A higher number indicates a stronger signal. |
Signal Type | -- | Digital | The scan tool displays Digital or Analog. This is the signal type received by the VCIM. |
Time | -- | Numeric | The scan tool displays HH:MM:SS. This is the current time. |
Transceiver ID | -- | Varies | The scan tool displays a 2-5 digit value. This displays the ID number of the cellular tower that the VCIM is using for cellular signal. |
Scan Tool Output Control | Description |
|---|---|
B1000 Data | This shows the data recorded when DTC B1000 was set in the VCIM. |
Green LED | The VCIM illuminates the green LED on the inside rearview mirror when ON is selected. |
Phone Call Test | When ON is selected, VCIM commands OnStar to connect to the OnStar Center. |
PRL Update | This function performs an update of the Preferred Roamer List. Provides a list of alternate networks to use when the service provider's and/or subscriber's primary wireless network cannot be reached. |
Red LED | The VCIM illuminates the red LED on the inside rearview mirror when ON is selected. |
