GM Service Manual Online
For 1990-2009 cars only

The EBCM Scan Tool Data Lists contain all the antilock brake system related parameters that are available on the scan tool. The parameters in the list are arranged in alphabetical order. The column, 'Data List,' indicates the location of the parameter within the scan tool menu selections.

Use the EBCM Scan Tool Data Lists as directed by a diagnostic table or in order to supplement the diagnostic procedures. Begin all the diagnostic procedures with the ABS Diagnostic Starting Point. Use the EBCM Scan Tool Data Lists only after the following is determined:

    • There is no published DTC procedure nor published symptom procedure for the customer concern.
        OR
    • The DTC or symptom diagnostic procedure indicated by the diagnostic system check does not resolve the customer concern.

The Typical Data Values are obtained from a properly operating vehicle under the conditions specified in the first row of the Scan Tool Data List table. Comparison of the parameter values from the suspect vehicle with the Typical Data Values may reveal the source of the customer concern.

The ID Information menu is located on the EBCM main screen.

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Ignition ON, Engine OFF, and vehicle is stationary

Battery Voltage

    • ABS Data
    • TCS Data

Volts

B+

Brake Light Switch

    • ABS Data
    • TCS Data

Applied/Released

Released

Left Front Wheel Speed

    • ABS Data
    • TCS Data

mph/km/h

0

Left Rear Wheel Speed

    • ABS Data
    • TCS Data

mph/km/h

0

LF Dump Valve Command

    • ABS Data
    • TCS Data

Active/Inactive

Inactive

LF Dump Valve Feedback

    • ABS Data
    • TCS Data

Active/Inactive

Inactive

LF Hold Valve Command

    • ABS Data
    • TCS Data

Active/Inactive

Inactive

LF Hold Valve Feedback

    • ABS Data
    • TCS Data

Active/Inactive

Inactive

LR Dump Valve Command

    • ABS Data
    • TCS Data

Active/Inactive

Inactive

LR Dump Valve Feedback

    • ABS Data
    • TCS Data

Active/Inactive

Inactive

LR Hold Valve Command

    • ABS Data
    • TCS Data

Active/Inactive

Inactive

LR Hold Valve Feedback

    • ABS Data
    • TCS Data

Active/Inactive

Inactive

Pump Motor Relay

    • ABS Data
    • TCS Data

On/Off

Off

Right Front Wheel Speed

    • ABS Data
    • TCS Data

mph/km/h

0

Right Rear Wheel Speed

    • ABS Data
    • TCS Data

mph/km/h

0

RF Dump Valve Command

    • ABS Data
    • TCS Data

Active/Inactive

Inactive

RF Dump Valve Feedback

    • ABS Data
    • TCS Data

Active/Inactive

Inactive

RF Hold Valve Command

    • ABS Data
    • TCS Data

Active/Inactive

Inactive

RF Hold Valve Feedback

    • ABS Data
    • TCS Data

Active/Inactive

Inactive

RR Dump Valve Command

    • ABS Data
    • TCS Data

Active/Inactive

Inactive

RR Dump Valve Feedback

    • ABS Data
    • TCS Data

Active/Inactive

Inactive

RR Hold Valve Command

    • ABS Data
    • TCS Data

Active/Inactive

Inactive

RR Hold Valve Feedback

    • ABS Data
    • TCS Data

Active/Inactive

Inactive

TCS Switching Valve 1 Status

TCS Data

Active/Inactive

Inactive

TCS Switching Valve 2 Status

TCS Data

Active/Inactive

Inactive

TCS Shut Off Valve 1 Status

TCS Data

Active/Inactive

Inactive

TCS Shut Off Valve 2 Status

TCS Data

Active/Inactive

Inactive

Valve Relay State

    • ABS Data
    • TCS Data

On/Off

Off