GM Service Manual Online
For 1990-2009 cars only

The audible warnings alert the driver of a system concern or a critical vehicle condition. The Multifunction Alarm Module (MFAM) generates the audible warnings through an internal speaker. The MFAM emits audible warnings based on various inputs. If the MFAM receives multiple audible warning requests, the warning with the highest priority sounds first.

Fasten Safety Belt Warning

The MFAM activates the fasten safety belt audible warning, and illuminates the fasten safety belt indicator in the IPC when the following occurs:

    • The ignition switch transitions to RUN.
    • The seat belt is not buckled and the signal circuit is low.

When the chime is activated and the seat belt is buckled, the chime will stop. After the initial transition to RUN, and the seat belt is unbuckled, the chime will not activate.

Key-In-Ignition Warning

The MFAM activates the key-in-ignition audible warning when all of the following occurs:

    • The driver door is open and the signal circuit is low.
    • The key is in the ignition and the signal circuit is low.

Lights On Warning

The MFAM activates the lights on warning when the following occurs:

    • The ignition is not in the RUN or START position.
    • The headlamp switch is in the PARK or head position.
    • The instrument panel dimmer switch is not at the most dim setting.

Overspeed Warning (Export Only)

The MFAM activates the overspeed warning when the vehicle speed exceeds 120 km/h. The MFAM monitors the PCM vehicle speed signal circuit