Ford Mustang (1999-2004) Service Manual: Principles of Operation

Key-In-Ignition Warning Chime

The key-in-ignition warning chime activates when the generic electronic module (GEM) detects the ignition switch circuits are in the OFF or ACC states and when the GEM detects the driver door is ajar from the driver door ajar circuits. Refer to the Chime Duration Table in this section for audible output, duration time, and priority ratings.

Airbag Warning Chime

The airbag warning chime activates when the GEM detects the ignition switch circuits are in the RUN state and when the GEM detects a chime is requested from the airbag system circuit. Refer to the Chime Duration Table for audible output, duration time, and priority ratings.

Door Ajar Warning Chime

The door ajar warning chime activates when the GEM detects the ignition switch circuits are in the RUN state and when the GEM detects the driver or passenger door is ajar from the driver and passenger door ajar circuits. Refer to the Chime Duration Table in this section for audible output, duration time, and priority ratings.

Headlamps Left on Warning Chime

The headlamps left on warning chime activates when the GEM detects the ignition switch circuits are in the KEYOUT state, when the GEM detects the driver door is ajar from the driver door ajar circuit, and when the GEM detects the headlamps or parklamps are on from the exterior lamp circuits. Refer to the Chime Duration Table in this section for audible output, duration time, and priority ratings.

Safety Belt Warning Chime

The safety belt warning chime and safety belt warning lamp activate when the GEM detects the ignition switch circuits are in the RUN or START state and when the GEM detects the safety belt is unbuckled from the safety belt circuit. The safety belt warning lamp indicator will prove out for three seconds whenever the GEM detects that the ignition circuits make a transition to RUN from OFF, ACC, or KEYOUT state. Refer to the Chime Duration Table in this section for audible output, duration time, and priority ratings.

Belt Minder

NOTE: Belt minder is a configurable item. If configuring using a diagnostic tool, refer to Section. To configure without using a diagnostic tool, refer to Belt Minder Deactivating/Activating in this section.

The belt minder feature supplements the current safety belt warning function. The belt minder feature is enabled after the current safety belt warning is complete. If the driver safety belt is not buckled approximately five seconds after the safety belt warning light has turned off, the belt minder reminds the driver that their safety belt is unbuckled by intermittently sound a chime and illuminating the safety belt warning lamp in the instrument cluster. While activated, the belt minder alternates the chime and indicator from on for six seconds to off for 30 seconds.

The belt minder reminder stops when:

  • the drive seat belt is buckled.
  • the ignition is turned to OFF or ACC.
  • five minutes have elapsed since belt minder has started.

Chime Duration Table

Feature Audible Output Duration Priority
Safety belt Chime, 60/minute 740 Hz 6.0 seconds 1
Key-in-ignition Chime, 120/minute 740 Hz Continuous 2
Headlamps left on Chime, 240/minute 740 Hz Continuous 3
Airbag Single tone, 1,000 Hz Continuous 4
Door ajar Single tone, 1,000 Hz 1.0 second 7
    Gauges And Warning Devices
    Refer to Wiring Diagrams Cell 59 , Generic Electronic Module for schematic and connector information. Refer to Wiring Diagrams Cell 60 , Instrument Cluster for schematic and connector infor ...

    Inspection and Verification
    NOTE: Upon installation of a new GEM, the module must be reconfigured. For additional information, refer to Section. 1. The warning lamps are a GEM controlled system; refer to Section. 2. Ve ...

    Other materials:

    Switch - Key-In-Ignition Warning
    Removal 1. Remove the ignition switch lock cylinder. 1. Insert the ignition key and turn to the RUN position. 2. Insert a punch in the access hole of the steering column and press the release tab while pulling out the ignition switch lock cy ...

    Jump-starting the vehicle
    WARNING: The gases around the battery can explode if exposed to flames, sparks, or lit cigarettes. An explosion could result in injury or vehicle damage. WARNING: Batteries contain sulfuric acid which can burn skin, eyes and clothing, if contacted. Do not atte ...

    Universal Garage Door Opener (If Equipped)
    UNIVERSAL GARAGE DOOR OPENER The appearance of your vehicle’s universal garage door opener will vary according to your option package. Before programing, make sure you identify which transmitter you have by comparing it to the graphics below. HomeLink® Ca ...