GM Service Manual Online
For 1990-2009 cars only
Table 1: Instrument Panel Cluster (IPC)
Table 2: Engine Control Module (ECM)

Instrument Panel Cluster (IPC)

Scan Tool Output Control

Additional Menu Selections

Description

Special Functions

DIC All Segment Test

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

Special Functions

Dimming

The instrument panel cluster (IPC) dims from 0 - 100 percent when commanded ON from the scan tool.

Special Functions

Display Test

The IPC illuminates all of the indicators for seven seconds when commanded ON from the scan tool. The IPC turns off the indicators when commanded OFF from the scan tool or the IPC turns the indicators OFF after the seven seconds.

Special Functions

IPC Gage Sweep Test

The IPC drives all of the gages at or above maximum for a few seconds when commanded from the scan tool. The IPC Display Test will end after one cycle of the gage sweep.

Engine Control Module (ECM)

Scan Tool Output Control

Additional Menu Selections

Description

Special Functions

Malfunction Indicator Lamp (MIL)

The engine control module (ECM) commands the MIL indicator ON and OFF.