GM Service Manual Online
For 1990-2009 cars only
Table 1: Communication Interface Module Scan Tool Data Parameters
Table 2: Communication Interface Module Scan Tool Output Controls

Communication Interface Module Scan Tool Data Parameters

Parameter

System State

Expected Value

Description

Operating Conditions: Ignition ON

Date

--

Numeric

This displays DD/MM/YYYY. This is the date the CIM was manufactured.

GPS Signal

--

Yes

The scan tool displays Yes or No. Yes is displayed if there is a GPS signal received by the CIM.

Signal Strength

--

68

The scan tool displays 0-100. This is the CIM signal strength.

Signal Type

--

Digital

The scan tool displays Digital or Analog. This is the signal type received by the CIM.

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 is the transceiver identification number.

Communication Interface Module Scan Tool Output Controls

Output Control

Description

B1000 Data

This shows the data recorded when DTC B1000 was set in the CIM.

Green LED

The CIM illuminates the green LED on the inside rearview mirror when ON is selected.

Phone Call Test

When ON is selected, CIM commands OnStar to connect to the OnStar Center.

PRL Update

The CIM performs a preferred roaming list (PRL) update when this is selected.

Program Digital Home SID - NID

Select SID (Station ID) and NID (Network Interface Device) per your location.

Program Phone Number

CIM provides mobile ID # and mobile directory # for this vehicle. Use arrow keys to change the phone # if necessary.

Red LED

The CIM illuminates the red LED on the inside rearview mirror when ON is selected.

Set Language

Pick an option between 3 different languages: English, French Canadian, and Spanish.

CIM Setup

Screen displays: Move the vehicle to an open, outside area and make sure the vehicle is running. Following this CIM setup procedure, a call will automatically be made to the OnStar Call Center. Inform the Call Center advisor that a new CIM has been installed. Have the STID and ESN from the new CIM ready to provide to the advisor. Refer to Communication Interface Module Programming and Setup.