GM Service Manual Online
For 1990-2009 cars only
Table 1: Instrument Panel Cluster Scan Tool Data Parameters
Table 2: Instrument Panel Cluster Scan Tool Output Controls

Instrument Panel Cluster Scan Tool Data Parameters

Parameter

System State

Expected Value

Description

Operating Conditions: Engine ON

Air Bag Indicator Command

--

Off

The scan tool displays On or Off. This is the state of the air bag indicator command.

Average Speed

--

Varies

The scan tool displays km/h (mph). This is the average speed of the vehicle.

Battery Voltage Signal

--

Varies

This displays Volts. This is the current battery voltage signal.

Brake Fluid Level Switch

--

Off

The scan tool displays On or Off. This is the state of the brake fluid level switch.

Brake Warning Indicator Command

--

Off

The scan tool displays On or Off. This is the state of the brake warning indicator command.

Chime

--

Varies

The scan tool displays On or Off. This is the state of the vehicle chime.

Dim Down Switch

--

Inactive

The scan tool displays Active or Inactive. This is the state of the dim down switch.

Dim Select Switch

--

Inactive

The scan tool displays Active or Inactive. This is the state of the dim select switch.

Dim Up Switch

--

Inactive

The scan tool displays Active or Inactive. This is the state of the dim up switch.

Dome Lamp Switch

--

Off

The scan tool displays On or Off. This is the state of the dome lamp switch.

ECT

--

Varies

This displays °C (°F). This is the current engine coolant temperature (ECT).

Engine Oil Life

--

Varies

This displays %. This is the engine oil life remaining measured in percent.

Engine Oil Pressure

--

Varies

This displays kPa (psi). This is the current engine oil pressure.

Engine Speed Signal

--

Varies

This displays RPM. This is the current engine speed.

Front Fog Indicator Command

--

Off

The scan tool displays On or Off. This is the state of the front fog indicator command.

High Beam Indicator Command

--

Off

The scan tool displays On or Off. This is the state of the high beam indicator command.

Information Down Switch

--

Inactive

The scan tool displays Active or Inactive. This is the state of the information down switch.

Information Up Switch

--

Inactive

The scan tool displays Active or Inactive. This is the state of the information up switch.

Left Turn Signal

--

Off

The scan tool displays On or Off. This is the state of the left turn signal.

Odometer

--

Varies

This displays km (mi). This is the current odometer reading.

Options Switch

--

Inactive

The scan tool displays Active or Inactive. This is the state of the options switch.

Park Brake Switch

--

Released

The scan tool displays Applied or Released. This is the state of the park brake switch.

Park Lamps Signal

--

Off

The scan tool displays On or Off. This is the state of the park lamps signal.

Rear Fog Indicator Command

--

Off

The scan tool displays On or Off. This is the state of the rear fog indicator command.

Reset Switch

--

Inactive

The scan tool displays Active or Inactive. This is the state of the reset switch.

Right Turn Signal

--

Off

The scan tool displays On or Off. This is the state of the right turn signal.

Seat Belt Indicator Command

--

Off

The scan tool displays On or Off. This is the state of the seat belt indicator command.

Security Indicator Command

--

Off

The scan tool displays On or Off. This is the state of the security indicator command.

Vehicle Speed Signal

--

0 km/h (0 mph)

This displays km/h (mph). This is the current vehicle speed.

Windshield Washer Fluid Switch

--

OK

The scan tool displays OK or Low Fluid. This is the state of the windshield washer fluid switch.

Instrument Panel Cluster Scan Tool Output Controls

Output Control

Description

Coolant Gauge Sweep Test

This output control is used to sweep the coolant gauge when ON is selected.

Display Test

This output control is used to command all indicators ON or OFF.

Fuel Gauge Sweep Test

This output control is used to sweep the fuel gauge when ON is selected.

Oil Gauge Sweep Test

This output control is used to sweep the oil gauge when ON is selected.

Speed Gauge Sweep Test

This output control is used to sweep the speedometer when ON is selected.

Tach Gauge Sweep Test

This output control is used to sweep the tachometer when ON is selected.

Volts Gauge Sweep Test

This output control is used to sweep the volts gauge when ON is selected.