GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 1999 🢒 Sunfire 🢒 Body and Accessories 🢒 Instrument Panel, Gauges, and Console 🢒 Audible Warnings Circuit Description

The multi-function alarm module performs the following functions:

    • The module controls the Audible Warnings System.
    • The module sounds a chime in order to bring attention to the following conditions:
      • The key is in the ignition cylinder with the door open.
      • The seat belt is not fastened.
      • The headlamps are on with the door open.
    • The module controls a battery run down protection feature.

Key-in Ignition Chime

Voltage is applied at all times to the multi-function alarm module connector C2 terminal D. The voltage is applied through the INT LAMP fuse. When the ignition key is in the ignition switch and the left front door is open, the following actions occur:

    • The multi-function alarm module connector C1 terminal H is grounded.
    • The multi-function alarm module connector C1 terminal E is grounded.
    • The chime sounds.

Fasten Belts Chime

Voltage is applied through the ALARM fuse to the multi-function alarm module connector C1 terminal M when the ignition switch is in one of the following positions:

    • RUN
    • BULB TEST
    • START

When the left front seat belt is unbuckled, the multi-function alarm module connector C1 terminal K is grounded through the seat belt switch. The fasten seat belts chime sounds for 4 to 8 seconds.

Fasten Belts Indicator

The instrument panel cluster controls the fasten belts indicator. For diagnosis of this indicator, refer to Instrument Panel Cluster (IPC) Microprocessor.

Lamps-On Chime

The multi-function alarm module sounds the lamps-on chime when the following conditions are met:

  1. The battery voltage at the multi-function alarm module connector C1 terminal D indicates that the following components are on.
    2. • The parklamps
    • The headlamps
  2. The multi-function alarm module connector C1 terminal  M reads 0 volts. This condition indicates that the ignition switch is in one of the following positions:
    3. • OFF
    • ACCY
    • LOCK
  3. Ground at the multi-function alarm module connector C1 terminal H indicates that the left front door is open.

Battery Run Down Protection

The battery run down protection feature is composed of the following components:

    • The inadvertent power control
    • The courtesy lamps control

Inadvertent Power Control

The inadvertent power control output of the multi-function alarm module supplies voltage to the following lamps:

    • The courtesy lamp
    • The header lamp
    • The rear quarter lamp
    • The vanity mirror lamp
    • The reading lamp
    • The I/P compartment lamp
    • The luggage compartment lamp

For more information, refer to Interior Lights, Cell 114 in Electrical Diagnosis.

Courtesy Lamps Control

The courtesy lamps control output of the multi-function alarm module supplies ground to the following lamps:

    • The courtesy lamp
    • The dome lamp

For more information, refer to Interior Lights, Cell 114 in Electrical Diagnosis.

Power Output Diagnostic Mode

Use he power output diagnostic module in the multi-function alarm module in order to run a quick test on the operation of the following component outputs:

    • The parasitic power control
    • The courtesy lamps control
    • the inadvertent power control

The power output diagnostic module activates after you have performed all of the following actions:

  1. Close all of the doors.
  2. Set the park brake.
  3. Turn the ignition switch to the RUN position. Before 15 seconds pass, perform the following steps:
    4. • Open the right front door.
    • Cycle the headlamp switch from OFF to PARK 3 times.

During normal operations, the multi-function alarm module will flash the interior lamps until the ignition switch is turned to OFF. In the event of an internal short in the multi-function alarm module, the module will chime at the following rates:

    • One chime every 3 seconds indicates an inadvertent output failure.
    • Two chimes every 3 seconds indicate a courtesy output failure.
    • Three chimes every 3 seconds indicate a parasitic output failure.