GM Service Manual Online
For 1990-2009 cars only
Table 1: Body Control Module (BCM)
Table 2: EBCM Scan Tool Data List

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.

Body Control Module (BCM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Ignition ON, engine OFF, brake fluid level normal, and park brake released.

ABS Fault

ABS/TCS Data

Yes/No

No

Battery 1

ABS/TCS Data

Volts

11.5 Volts

Park Brake Switch

Switch Inputs

Off/On

Off

Traction Active

ABS/TCS Data

No/Yes

No

Traction Control Status

ABS/TCS Data

On/Off

On

Traction LED Command

ABS/TCS Data

On/Off

On

Traction LED Feedback

ABS/TCS Data

High/Low

Low

Low Brake Fluid Level

Switch Inputs

No/Yes

No

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

 

Brake lamp Switch State

ABS

On/Off

Off

Delivered Engine Torque

ABS

percent

 

Engine Speed

ABS

RPM

0

Left Front Wheel Speed

ABS

km/h or mph

0

Left Rear Wheel Speed

ABS

km/h or mph

0

LF Inlet Valve Solenoid

ABS

Apply/Released

Released

LF Outlet Valve Solenoid

ABS

Apply/Released

Released

LF Valve Solenoids

ABS

Apply/Released

Released

LR Inlet Valve Solenoid

ABS

Apply/Released

Released

LR Outlet Valve Solenoid

ABS

Apply/Released

Released

LR Valve Solenoids

ABS

Apply/Released

Released

RF Inlet Valve Solenoid

ABS

Apply/Released

Released

RF Outlet Valve Solenoid

ABS

Apply/Released

Released

RF Valve Solenoids

ABS

Apply/Released

Released

Return Pump Relay

ABS

  

Right Front Wheel Speed

ABS

km/h or mph

0

Right Rear Wheel Speed

ABS

km/h or mph

0

RR Inlet Valve Solenoid

ABS

Apply/Released

Released

RR Outlet Valve Solenoid

ABS

Apply/Released

Released

RR Valve Solenoids

ABS

Apply/Released

Released

TCS Switch State

ABS

On/Off

Off

Valve Relay

ABS

Volts

 

Valve Relay State

ABS

On/Off

On