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%

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

LR Dump Valve Command

ABS

On/Off

Off

LF ISO Valve Command

ABS

On/Off

Off

LR ISO Valve Command

ABS

On/Off

Off

Master Cylinder Pressure Sensor

VSES

KPa/psi

0 KPa/psi

Master Cylinder Pressure Sensor

VSES

Volts

2.5 Volts

RF Dump Valve Command

ABS

On/Off

Off

RR Dump Valve Command

ABS

On/Off

Off

RF ISO Valve Command

ABS

On/Off

Off

RR ISO Valve Command

ABS

On/Off

Off

Requested Torque

Traction Assist

%

91%

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

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

VSES Equipped

VSES

Yes/No

Yes

VSES Relay Command

VSES

On/Off

On

Yaw Rate Sensor Input

VSES

Volts

2.5 Volts