GM Service Manual Online
For 1990-2009 cars only

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Ignition ON, Engine OFF, Transmission in Neutral or Park, Transfer Case in 2WD, and Brake Unapplied

ABS Active

ABS/4WD

No/Yes

No

ABS Relay Command

ABS

On/Off

On

ABS Relay Feedback

ABS

On/Off

On

ABS Warning Lamp

ABS

On/Off

Off

Accelerometer Status

4WD

    • OK
    • Short to Ground
    • Unreasonably Low
    • Unreasonably High
    • Open

OK

Brake Fluid Level

ABS

OK/Low

OK

Brake Switch Status

ABS/4WD

Applied/Released

Released

Idle Up Circuit

4WD

OK/Failed

OK

Ignition Voltage

ABS/4WD

Volts

Varies

Left Front Wheel Speed

ABS/4WD

mph/km/h

0

Left Rear Wheel Speed

ABS/4WD

mph/km/h

0

LF Inlet Valve Solenoid

ABS

Active/Inactive

Inactive

LF Outlet Valve Solenoid

ABS

Active/Inactive

Inactive

Pump Motor Commanded State

ABS

On/Off

Off

Pump Motor Feedback State

ABS

On/Off

Off

Rear Inlet Valve Solenoid

ABS

Active/Inactive

Inactive

Rear Outlet Valve Solenoid

ABS

Active/Inactive

Inactive

Red Brake Lamp

ABS

On/Off

Off

RF Inlet Valve Solenoid

ABS

Active/Inactive

Inactive

RF Outlet Valve Solenoid

ABS

Active/Inactive

Inactive

Right Front Wheel Speed

ABS/4WD

mph/km/h

0

Right Rear Wheel Speed

ABS/4WD

mph/km/h

0

Rough Road Parameter

ABS/4WD

g

0.00

Switched Battery Voltage

ABS/4WD

Volts

Varies

Vehicle Speed

ABS/4WD

mph/km/h

0

4WD Status

4WD

Two Wheel Drive/Four Wheel Drive

Two Wheel Drive

4WD Switch

4WD

Normal/Open

Normal