SW1 L4-1.9L SOHC VIN 8 (1996)
Audible Warning Device: Component Tests and General Diagnostics
Chime
The chime module has several vehicle functions including audible warnings for an unbuckled driver seat belt, key-in-ignition reminder and a lights-on
reminder. The chime also controls the rear defogger system and the seat belt telltale. The chime system consists of a chime module (located in the
instrument panel junction block) and various switches and components which provide inputs to or receive outputs from the chime module.
Chime Audible Operation
The chime sound consists of repetitive pulses of a
1000 Hz tone. The amplitude of each pulse decays gradually, as opposed to an abrupt beeping sound.
The following repetition rates distinguish the various reminders:
^
Seat belt -
50 cycles per minute
^
Key-In -
120 cycles per minute
^
Lights-On -
180 cycles per minute.
Some audible warnings take precedence over others. The following is the list of audible warnings in order of precedence:
1. Seat Belt Audible
2. Key reminder Audible
3. Lights on Audible
Seat Belt Audible
The chime module provides an audible reminder (five chimes over eight seconds) in the event of the following condition:
^
The ignition key is in the RUN position, and the driver's seat belt is unbuckled.
Key Minder Audible
Key reminder Audible
The chime module provides an audible warning if the driver's door is open, the key is in the ignition and the conditions outlined in the following chart
are present. The following chart assumes that the ignition switch is moved through the positions in the listed order.
The chime provides a one second delay when the ignition switch is moved through the ACC position during normal starting of the vehicle, and the
driver's door is open. After the one second delay, the audible is heard.
The key reminder warning is provided on exit, not on entry, if the key is in the LOCK position. The driver will enter the vehicle, insert the key in the
ignition switch before closing the driver's door and not hear the audible warning.
Lights On Minder Audible
The chime module provides an audible warning if the park lamps or headlamps are on, and the driver's door is open and one of two conditions exist:
The key is out of the ignition switch, or the key is in the ignition at the LOCK position and has not been turned. in addition, if a condition exists
calling for both the key minder audible and the lights on minder audible, the key minder audible takes priority.
Chime Inputs/Outputs
Door Jamb/Ajar Switch
The doorjamb/ajar switch is a plunger type switch mounted in the B-pillar. When the driver's door is opened beyond a prescribed distance, the switch
contacts close signalling to the chime module that the door is open.
Internal to the chime module the left front door ajar input pin 10 is connected to pin 9, but there is a diode between the two pins which prevents the
right front and rear doorjamb/ajar switches from pulling the left front door ajar input LO. This internal connection allows the left front doorjamb/ajar
switch to also control the dome lamp.
Ignition And Key Alarm Switch Assembly
The key minder circuit is a set of contacts that are activated by the ignition module mechanical driver. When the switch is closed, the circuit pulls the
chime module current input to ground. The ground circuit is provided by a wire ground to the switch.
Rear Defogger Switch And Timer
