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

IPC

Scan Tool Output Control

Additional Menu Selections

Description

IPC Gauge Sweep Test

Special Functions

The instrument panel cluster (IPC) drives all of the gages at or below minimum for a few seconds when you select ON, then drives all of the gages at or above maximum for a few seconds. The IPC Display Test will end after one cycle of the gages sweep.

Displays Test

Special Functions

The IPC illuminates all of the indicators and the DIC display segments for 7 seconds when you select ON. The IPC turns off the indicators and the DIC display segment after 7 seconds.

Dimming

Special Functions

The IPC gage backlighting are commanded ON and OFF.

Engine Control Module (ECM)

Scan Tool Output Control

Additional Menu Selections

Description

Special Functions

Malfunction Indicator Lamp (MIL)

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