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

Instrument Panel Cluster (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 for 7 seconds when you select ON. The IPC turns off the indicators after the 7 seconds.

Dimming

Special Functions

The IPC increases or decreases the dimming intensity in increments of 20 percent between a range of 0-100 percent.

Engine Control Module (ECM)/Powertrain Control Module (PCM)

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.