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

4WD

ABS Active

ABS/VSES

Yes/No

No

ABS Lamp Command

ABS/VSES

On/Off

Off

ABS Pump Motor

ABS/VSES

On/Off

Off

ABS Relay Command

ABS/VSES

On/Off

ON

ABS Stop State

VSES

On/Off

Off

Accum. Pressure Sensor

ABS/VSES

MPa/psi

Varies

Analog Steering Position Sensor

VSES

°

Varies

Battery Voltage

ABS

Volts

12.0 Volts

Brake Fluid Level

ABS/VSES

OK/Low

OK

Brake Switch Status

ABS/VSES

On/Off

Off

Brake Warning Lamp Command

VSES

On/Off

Off

Delivered Torque

ABS

%

Varies

Digital Steering Position Sensor

VSES

°

Varies

Lateral Accelerometer Input

VSES

m/s -ft/s

0

Left Front Wheel Speed

ABS

km/h or mph

0 km/h/0 mph

Left Rear Wheel Speed

ABS

km/h or mph

0 km/h/0 mph

LF Dump Valve Command

ABS/VSES

On/Off

Off

LF Iso. Valve Command

ABS/VSES

On/Off

Off

LR Dump Valve Command

ABS/VSES

On/Off

Off

LR Iso. Valve Command

ABS/VSES

On/Off

Off

Longitudinal Accelerometer Sensor Signal

ABS

m/s² or ft/s²

Varies

Master Cylinder Pressure Sensor Input

ABS/VSES

Kpa or Psi

0

Requested Torque

ABS

%

90%

Reverse Switch

ABS/VSES

On/Off

Off

RF Dump Valve Command

ABS/VSES

On/Off

Off

RF Iso. Valve Command

ABS/VSES

On/Off

Off

RR Dump Valve Command

ABS/VSES

On/Off

Off

RR Iso. Valve Command

ABS/VSES

On/Off

Off

RF Dump Valve Command

ABS/VSES

On/Off

Off

RF ISO Valve Command

ABS/VSES

On/Off

Off

Right Front Wheel Speed

ABS

km/h or mph

0 km/h/0 mph

Right Rear Wheel Speed

ABS

km/h or mph

0 km/h/0 mph

Stability System Active

VSES

Yes/No

No

Stability System Enabled

VSES

Yes/No

Yes

System Configuration

ABS/VSES

Invalid / Not Deturmined / Non-VSES Auto / Non-VSES Manual / VSES

Varies

System Voltage

VSES

Volts

12 V

TCS Status/EBCM -- TCS Active

ABS/VSES

Yes/No

No

TCS Status/PCM -- TCS Active

ABS/VSES

Yes/No

No

Traction Control Equipped

ABS

Invalid / Disabled / Enabled or N/A

Enabled

Traction Control Switch

ABS

Yes/No

Yes

Transmission Type

ABS/VSES

Invalid / Not Deturmined / Automatic / Manual

Varies

VSES Control Switch

VSES

Invalid / Disabled / Enabled or N/A

Enabled

VSES Equipped

VSES

Yes/No

Varies

Yaw Rate Sensor Input

VSES

°/sec

0