GM Service Manual Online
For 1990-2009 cars only

Refer to the Scan Tool Manual for complete information on scan tool diagnostics.

Scan Tool Output Control

Additional Menu Selection(s)

Description

PROM ID

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This function is used to identify the hardware and software revisions to the EBCM.

History Data

--

This function displays the last two digits and a description of any previously stored DTC(s) that have not been cleared.

Tire Size Calibration

    • Read Tire Calibration
    • New Tire Size

This function is used to view the existing tire calibration or to program tire size information into the EBCM memory. This must be done when a new EBCM is installed in the vehicle or when different size wheel/tires are installed on the vehicle.

Important: The VCM/PCM must also be programmed with the correct tire size calibration when wheel/tire size is changed. When calibrating the modules the EBCM must match the front tire size and the PCM/VCM must match the rear tire size

Function Test

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The Function test commands the system internal relay, valve solenoids and the pump motor on and off in order to verify proper component operation. If a malfunction is detected the EBCM will set a DTC(s).