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

Engine Control Module (ECM)

Scan Tool Output Control

Additional Menu Selection(s)

Description

GEN L-Terminal

Engine Control Module, Special Functions

Commands the generator L terminal On and Off.

Starter Relay

Engine Control Module, Special Functions

Commands the starter relay On and Off.

Instrument Panel Cluster (IPC)

Scan Tool Output Control

Additional Menu Selection(s)

Description

Segment Check

Instrument Panel Cluster, Special Functions

The IPC illuminates all indicators for 7 seconds.