GM Service Manual Online
For 1990-2009 cars only

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Ignition ON, Engine OFF and Brake released

4WD Status

ABS

Two wheel drive/Four wheel drive

Varies

ABS Lamp Command

ABS

On/Off

Off

ABS Pump Motor

ABS

On/Off

Off

ABS Relay Command

ABS

On/Off

ON

ABS Stop State

    • ABS
    • Traction Assist

On/Off

Off

Brake Switch Status

    • ABS
    • Traction Assist

On/Off

Off

Brake Warning Lamp Command

ABS

On/Off

Off

Diff. Pressure/Fluid Level Switch

ABS

Ok/Low

Ok

Delivered Torque

Traction Assist

%

35%

DRP Active

ABS

Yes/No

No

Lateral Accelerometer Sensor

VSES

Volts

2.5 Volts

Longitudinal Accelerometer Sensor

VSES

Volts

2.5 Volts

Left Front Wheel Speed

    • ABS
    • Traction Assist

km/h or mph

5 km/h/3 mph

LF Dump Valve Command

ABS

On/Off

Off

LF Dump Valve Feedback

ABS

On/Off

Off

LF ISO Valve Command

ABS

On/Off

Off

LF ISO Valve Feedback

ABS

On/Off

Off

Low Traction Lamp Command

Traction Assist

On/Off

Off

Master Cylinder Pressure Sensor

VSES

KPa/psi

0 KPa/psi

Master Cylinder Pressure Sensor

VSES

Volts

2.5 Volts

Rear Dump Valve Command

ABS

On/Off

Off

Rear Dump Valve Feedback

ABS

On/Off

Off

Rear ISO Valve Command

ABS

On/Off

Off

Rear ISO Valve Feedback

ABS

On/Off

Off

Rear Wheel Speed

    • ABS
    • Traction Assist

km/h or mph

5 km/h/3 mph

Requested Torque

Traction Assist

%

91%

RF Dump Valve Command

ABS

On/Off

Off

RF Dump Valve Feedback

ABS

On/Off

Off

RF ISO Valve Command

ABS

On/Off

Off

RF ISO Valve Feedback

ABS

On/Off

Off

Right Front Wheel Speed

    • ABS
    • Traction Assist

km/h or mph

5 km/h/3 mph

Stability System Active

VSES

Yes/No

No

Stability System Enable

VSES

Yes/No

Varies

Steering Wheel Position

VSES

Degrees

Varies

System Voltage

ABS/TCS/VSES

Volts

12 Volts

Traction Control Active

Traction Assist

Yes/No

No

Traction Control Enabled

Traction Assist

Yes/No

Varies

Traction Control Equipped

Traction Assist

Yes/No

Yes

Traction Control Slip

Traction Assist

Yes/No

No

Traction Off Lamp Command

Traction Assist

On/Off

Off

VSES Equipped

VSES

Yes/No

Yes

VSES Relay Command

VSES

On/Off

On

Yaw Rate Sensor Input

VSES

Volts

2.5 Volts