GM Service Manual Online
For 1990-2009 cars only
Table 1: L61/LX9 Powertrain Control Module (PCM)
Table 2: LZ9 Engine Control Module (ECM)

L61/LX9 Powertrain Control Module (PCM)

Scan Tool Output Control

Additional Menu Selection(s)

Description

GEN L-Terminal

Engine Electrical, Special Functions, PCM

The powertrain control module (PCM) commands the generator OFF when off is selected. The generator will then stop generating an output voltage.

Segment Check

Body and Accessories, Instrument Panel, Special Function, IPC

The instrument panel cluster (IPC) illuminates all indicators to test for an inoperative indicator. The battery indicator is just to the left of the engine indicator.

LZ9 Engine Control Module (ECM)

Scan Tool Output Control

Additional Menu Selection(s)

Description

GEN L-Terminal

Engine Electrical, Special Functions, ECM

The engine control module (ECM) commands the generator OFF when off is selected. The generator will then stop generating an output voltage.

Segment Check

Body and Accessories, Instrument Panel, Special Function, IPC

The instrument panel cluster (IPC) illuminates all indicators to test for an inoperative indicator. The battery indicator is just to the left of the engine indicator.

Starter Relay

Engine Electrical, Special Functions, ECM

The ECM commands the starter relay Off and On.