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

Body Control Module (BCM)

Scan Tool Output Control

Additional Menu Selection(s)

Description

Interior Lamps

Output Control/Lamp Test

The body control module (BCM) turns the interior lamps ON when you select ON. The interior lamps should stay ON until commanded OFF.

I/P Illumination Lamps

Output Control/Lamp Test

The BCM turns the instrument panel illumination lamps on when you select ON. The illumination lamps should stay on until commanded OFF.

Transmission Range Indicator

Output Control/Lamp Test

The BCM turns the PRNDL indicators ON when you select ON. The PRNDL should stay ON until commanded OFF.

Instrument Panel Cluster (IPC)

Scan Tool Output Control

Additional Menu Selection(s)

Description

Lamp and Gauge Check

The instrument panel cluster (IPC) illuminates the following indicators when you select ON:

    • ABS
    • Air Bag
    • BRAKE
    • Charge
    • Fasten Safety Belt
    • High Beam
    • Liftgate Ajar
    • Low Fuel
    • Low Oil Pressure
    • Low Traction
    • Reduced Engine Power
    • Security
    • Tire Pressure Monitor
    • Traction OFF

The IPC drives the following gages to maximum position when you select ON:

    • Engine Coolant Temperature Gage
    • Fuel Gage
    • Speedometer
    • Tachometer

The indicators should stay illuminated and all gages remain at maximum until commanded OFF. When commanded OFF, the indicators should turn OFF and all gages should remain at the minimum position until the test is exited or commanded ON.