GM Service Manual Online
For 1990-2009 cars only

The electronic brake control module (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 antilock brake system (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.

EBCM Scan Tool Data List

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Ignition is ON, engine OFF, and vehicle is stationary

Battery Voltage

ABS

Volts

11.5 Volts

Brake Switch

ABS

Applied/Released

Released

Left Front Wheel Speed

ABS/TCS

km/h or mph

0

Left Rear Wheel Speed

ABS/TCS

km/h or mph

0

LF Inlet Valve Solenoid

ABS

Active/Inactive

Inactive

LF Outlet Valve Solenoid

ABS

Active/Inactive

Inactive

LR Inlet Valve Solenoid

ABS

Active/Inactive

Inactive

LR Outlet Valve Solenoid

ABS

Active/Inactive

Inactive

LF Valve Solenoid

TCS

Apply/Released

Released

LR Valve Solenoid

TCS

Apply/Released

Released

Pump Motor Relay Command

ABS/TCS

On/Off

Off

Pump Motor Relay Feedback

ABS/TCS

On/Off

Off

RF Inlet Valve Solenoid

ABS

Active/Inactive

Inactive

RF Outlet Valve Solenoid

ABS

Active/Inactive

Inactive

RR Inlet Valve Solenoid

ABS

Active/Inactive

Inactive

RR Outlet Valve Solenoid

ABS

Active/Inactive

Inactive

Right Front Wheel Speed

ABS/TCS

km/h or mph

0

Right Rear Wheel Speed

ABS/TCS

km/h or mph

0

RF Valve Solenoid

TCS

Apply/Released

Released

RR Valve Solenoid

TCS

Apply/Released

Released

Traction Switch

BCM

On/Off

On

Traction Switch LED

BCM

On/Off

On

Valve Relay

ABS/TCS

On/Off

On

Valve Relay State

ABS/TCS

On/Off

On