GM Service Manual Online
For 1990-2009 cars only

Scan Tool Data List ExceptHolden

The electronic brake control module (EBCM) Scan Tool Data Lists contain all the ABS 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

Volts

B+

Brake Light Switch

ABS Data

Applied/Released

Released

Left Front Wheel Speed

ABS Data

mph/km/h

0

Left Rear Wheel Speed

ABS Data

mph/km/h

0

LF Dump Valve Command

ABS Data

On/Off

Off

LF Dump Valve Feedback

ABS Data

On/Off

Off

LF Hold Valve Command

ABS Data

On/Off

Off

LF Hold Valve Feedback

ABS Data

On/Off

Off

LR Dump Valve Command

ABS Data

On/Off

Off

LR Dump Valve Feedback

ABS Data

On/Off

Off

LR Hold Valve Command

ABS Data

On/Off

Off

LR Hold Valve Feedback

ABS Data

On/Off

Off

Pump Motor Relay

ABS Data

On/Off

Off

Right Front Wheel Speed

ABS Data

mph/km/h

0

Right Rear Wheel Speed

ABS Data

mph/km/h

0

RF Dump Valve Command

ABS Data

On/Off

Off

RF Dump Valve Feedback

ABS Data

On/Off

Off

RF Hold Valve Command

ABS Data

On/Off

Off

RF Hold Valve Feedback

ABS Data

On/Off

Off

RR Dump Valve Command

ABS Data

On/Off

Off

RR Dump Valve Feedback

ABS Data

On/Off

Off

RR Hold Valve Command

ABS Data

On/Off

Off

RR Hold Valve Feedback

ABS Data

On/Off

Off

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

On/Off

Off