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

Expected Value

Definition

Operating Conditions: Ignition ON

Battery Voltage

Varies

This displays volts. The scan tool displays the system voltage of the vehicle.

Display Dimming

Varies

This displays 0-100%. This is the current displays dimming percentage.

Engine Speed Signal

0 RPM

This displays 0-9999 RPM. The IPC monitors the engine speed signal circuit from the ECM via serial data.

Ignition 1

Active

The scan tool displays Active or Inactive. This is the state of the ignition 1 voltage circuit to the instrument panel cluster (IPC).

LCD Dimming

Varies

This displays 0-100%. This is the current backlighting dimming percentage.

Passenger Seatbelt Indicator Commanded

Off

The scan tool displays On or Off. This is the state of the passenger seatbelt indicator command as monitored by the IPC.

Passenger Seatbelt Indicator Status

Off

The scan tool displays On or Off. This is the status of the passenger seatbelt indicator as monitored by the IPC.

Pointer Dimming

Varies

This displays 0-100%. This is the current pointer dimming percentage.

Vehicle Speed

0 km/h (0 mph)

This displays km/h (mph). This is the current vehicle speed received by the IPC from the ECM via a serial data message.

Instrument Panel Cluster Scan Tool Output Controls

Scan Tool Output Control

Description

Coolant Gauge Sweep

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

Display Test

The IPC illuminates the indicators when you select On.

Fuel Gauge Sweep

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

Segment Check

The IPC varies the backlight intensity.

Speed Gauge Sweep

The scan tool commands the IPC to sweep the speedometer gage between minimum and maximum when selected.

Tach Gauge Sweep

The scan tool commands the IPC to sweep the tachometer gage between minimum and maximum when selected.