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: Ignition ON

Battery Voltage

--

Varies

This displays volts. This is the voltage input supplied to the instrument panel cluster.

Brake Fluid Level Switch

--

Off

The scan tool displays Off/On. This is the status of the brake fluid level switch as monitored by the IPC

DIC Information Switch

--

Off

The scan tool displays Off/On. This is the status of the DIC information switch as monitored by the IPC.

Fuel Switch

--

Inactive

The scan tool displays Inactive/Active. This is the status of the DIC fuel switch signal as monitored by the instrument panel cluster (IPC).

Gauge Switch

--

Inactive

The scan tool displays Inactive/Active. This is the status of the DIC gauge switch signal as monitored by the IPC.

Outside Air Temp

--

Varies w/out side air temp.

The scan tool displays numeric counts. This is the status of the outside air temperature sensor as monitored by the IPC.

Outside Air Temp Raw

--

Varies w/out side air temp.

The scan tool displays Fahrenheit or Celsius. This is the raw outside air temperature as monitored by the IPC.

Outside Air Temp Filtered

__

Varies w/out side air temp.

The scan tool displays Fahrenheit or Celsius. This is the filtered outside air temperature as monitored by the IPC.

Reset Switch

__

Inactive

The scan tool displays Inactive/Active. This is the status of the DIC reset switch as monitored by the IPC.

Select Switch

__

Off

The scan tool displays Off/On. This is the status of the DIC select switch as monitored by the IPC.

Instrument Panel Cluster Scan Tool Output Controls

Output Control

Description

Coolant Gauge Sweep Test

The scan tool commands the IPC to sweep the coolant gage from minimum to maximum when selected.

DIC/Odometer

All segments of the driver information center (DIC) and odometer illuminate when ON is selected from the scan tool.

Display Test

The instrument panel cluster (IPC) illuminates all the indicators when commanded ON from the scan tool.

Fuel Gauge Sweep Test

The scan tool commands the IPC to sweep the fuel gage from minimum to maximum when selected.

Speed Gauge Sweep Test

The scan tool commands the IPC to sweep the speedometer from minimum to maximum when selected.

Tach Gauge Sweep Test

The scan tool commands the IPC to sweep the tachometer from minimum to maximum when selected.