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

Battery Voltage

ABS

Volts

12.0 Volts

Brake Switch Status

ABS

On/Off

Off

Delivered Torque

ABS

%

46%

Left Front Wheel Speed

ABS

km/h or mph

0 km/h/0 mph

LF Dump Valve Command

ABS

On/Off

Off

LF ISO Valve Command

ABS

On/Off

Off

Longitudinal Accelerometer Sensor Signal

ABS

Volts

2.5 Volts

Low Trac: TCS Active

ABS

Yes/No

No

Rear Dump Valve Command

ABS

On/Off

Off

Rear ISO Valve Command

ABS

On/Off

Off

Rear Wheel Speed

ABS

km/h or mph

0 km/h/0 mph

Requested Torque

ABS

%

90%

RF Dump Valve Command

ABS

On/Off

Off

RF ISO Valve Command

ABS

On/Off

Off

Right Front Wheel Speed

ABS

km/h or mph

0 km/h/0 mph

TCS Requested

ABS

Yes/No

Yes

TCS Failed

ABS

Yes/No

No