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CHIME/BUZZER WARNING SYSTEMS 8U - 1
CHIME/BUZZER WARNING SYSTEMS
SEAT BELT WARNING SYSTEM
INDEX
page
page
Diagnosis ..............................
General Information .......................
Key-In Switch Replacement ..................
Operation ..............................
GENERAL INFORMATION
The buzzer or optional chime module is located on
the convenience center. The convenience center is lo-
cated under the driver’s end of the instrument panel
(Figs. 1 and 2). The buzzer or chime sounds an au-
dible warning tone in any of the following conditions:
²
Key is in the ignition and driver’s door is open. (On
some vehicles, the buzzer will not sound if the igni-
tion switch is in the RUN position).
²
Ignition is switched ON and driver’s seat belt is not
buckled. Sound will quit after 4 to 8 seconds. Besides
the sound, a seat belt light indicator turns on as a
reminder to fasten seat belt.
²
An input from the Driver’s Information Center is
received.
There is also a door lock inhibit feature. If the key
is in the ignition or the lights are ON, while the
driver’s door is open, the power locks/keyless entry
will not operate.
Fig. 2 Turn Signal and Hazard Warning Flashers
LIGHTS ON
To sound the lights on warning, the module needs:
²
the headlamp switch must be closed
the driver’s door jamb switch must be closed.
These conditions ground pin 6 of the module. These
switches are closed when the headlamp switch is on,
and the driver’s door is open.
SEAT BELT WARNING
To sound the seat belt warning, the module needs:
Fig. 1 Convenience Center Location
²
battery voltage at pin (7)
OPERATION
Battery voltage for module operation is supplied to
two pins. Voltage is always present at pin 7. Pin 1
receives voltage when the ignition switch is in the
RUN or START position.
²
battery voltage at the ignition switch input (Pin 1)
²
a ground at the seat belt switch.
a ground at Pin 3.
This occurs when the seat belt switch is closed because
the driver’s seat belt is not buckled. The ‘‘fasten belt’’
light also will turn on along with the warning sound.
Vehicle lights are ON when the ignition is switched
OFF, the key is removed and driver’s door opened.
²
²
²
 8U - 2 CHIME/BUZZER WARNING SYSTEMS
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KEY IN IGNITION
To sound the key in ignition alarm, the module
needs:
²
the ignition key warning switch must be closed
the driver’s door jamb switch must be closed.
These conditions ground pin 6 of the module. These
switches are closed when the key is in the ignition
and the driver’s door is open.
VEHILCE INFORMATION CENTER
There will be 6 beeps (3 beeps, pause, 3 beeps) unless
the fault goes away or SET/SELECT is pressed in diag-
nostics mode. There should be no beeping for the first 8
seconds after the ignition turns ON. Beeping will only
occur for two messages in a row if the second message
has higher priority over the first message.
Fig. 4 Buzzer Module Terminal Identification
DOOR LOCK INHIBIT
Pin 8 of the chime module provides the ground for
the coil side of the power door lock relay.
The LOCK function will not operate if:
Measure voltage at buzzer/chime module connector
pin 1. Meter should read battery voltage. If not, re-
pair open circuit to ignition switch.
Turn ignition off and remove the key from the
ignition.
²
²
The chime module is not plugged in.
The key is in the ignition, or the lights are ON,
while the driver’s door is open.
²
Measure voltage at buzzer/chime module connector
pin 7. Meter should read battery voltage. If not, re-
pair open circuit to fuse.
The door lock inhibit feature of the chime module
is inoperable due to defective electronics in the chime.
In this case the operation is unpredictable.
RESISTANCE TESTS
DIAGNOSIS
If the buzzer/chime unit does not operate as described,
check the two fuses for pins 1 and 7 (Figs. 3, 4) and
replace as required. If the fuses are not defective, per-
form the following tests to determine if the problem is in
the module or in the wiring. Remove the module from
the fuse block. Plug in a known good module and check
its operation. If the problem is not corrected by replacing
the module, remove the module and continue as follows:
CAUTION: Before making resistance measurements,
turn ignition switch OFF and disconnect the battery
negative cable. This will avoid damaging the ohm-
meter.
Buzzer/chime module connector pin 2. Meter
should read almost zero ohms (bulb filament). If not,
replace seat belt indicator bulb.
²
Buzzer/chime module connector pin 3. Meter
should read zero ohms. If not, repair open circuit to
ground.
²
Buzzer/chime module connector pin 4. Driver’s seat
belt not buckled. Meter should read zero ohms. If not,
repair open circuit to ground (or buckle switch may be
defective). Meter should read open circuit if drivers
seat belt is buckled. If not, repair short to ground (or
buckle switch may be defective).
²
Buzzer/chime module connector pin 6. Open driv-
er’s door, key in ignition (in OFF position). Meter
should read zero ohms. If not, repair open circuit to
ground (or key-in-ignition switch may be defective).
²
Buzzer/chime module connector pin 6. Remove key
from ignition. Open driver’s door, headlamp switch
on, meter should read zero ohms. If not, repair open
circuit to ground.
Fig. 3 Convenience Center Terminal Identification
VOLTAGE TESTS
Ignition in RUN position, measure between
the following pins and vehicle ground.
²
²
²
Measure between the following pins and ve-
hicle ground.
²
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CHIME/BUZZER WARNING SYSTEMS
8U - 3
Fig. 5 Buzzer Module Schematic
8U - 4 CHIME/BUZZER WARNING SYSTEMS
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Fig. 6 Halo Lamp And Key-In Warning Switch Conti-
nuity Chart
KEY-IN SWITCH REPLACEMENT
REMOVAL
(1) Disconnect battery negative cable.
(2) Tilt column only—remove tilt lever (counter-
clockwise).
(3) Carefully remove both upper and lower steering
column covers. Requires removal of 3 screws (Torx
T-20).
(4) Remove 3 ignition switch mounting screws
(tamper proof Torx bit Snap-On TTXR20B2 or equiva-
lent required) (Fig. 7).
Fig. 8 Key In Switch And Halo Lamp Connector
Key Cylinder Pin
ignition switch assembly and about 1/8 inch above
the ignition switch halo light ring (Fig. 10).
CAUTION: Do not try to remove the key cylinder at
this time.
Fig. 7 Ignition Switch Screw Removal
(c) Rotate the key counterclockwise to the Lock
position and remove the key.
(d) Remove key cylinder (Fig. 11).
(5) Gently pull switch away from the column. Re-
lease 2 connector locks on the 7 terminal wiring con-
nector, then remove the connector from the ignition
switch.
(6) Release connector lock on the 4 terminal Key In
and Halo light connector then remove the connector
from the ignition switch (Fig. 8).
(7) Remove the key cylinder from the ignition
switch as follows:
(a) Place the key in the ignition switch in the
Lock position. Use a small screw driver to depress
the key cylinder retaining pin flush with the key
cylinder surface (Fig. 9).
(b) Rotate the key clockwise to the Off position.
The key cylinder should now be unseated from the
INSTALLATION
(1) Install 2 wiring connectors to the switch. Make
sure that the switch locking tabs are fully seated in
the wiring connectors.
(2) Mount ignition switch to the column with 3
screws. When equipped with column shift:
²
the shifter must be in the Park position
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CHIME/BUZZER WARNING SYSTEMS 8U - 5
into park lock link contour slot. Torque retaining
screws to 2 N
m (17 in. lbs.).
Fig. 12 Ignition Switch—View From Column
Fig. 10 Unseated Key Cylinder
Fig. 13 Ignition Switch Mounting Pad—Typical
m (17 in. lbs.).
(4) Tilt column only—install tilt lever (clockwise).
(5) Install battery negative cable.
(6) Install key cylinder as follows:
(a) With the key cylinder and the ignition in the
Lock position, gently insert the key cylinder into
the ignition switch assembly until it bottoms.
(b) Insert key, while gently pushing on the key
cylinder inward toward the ignition switch, rotate
the key clockwise to the Run position.
(7) Check for proper operation of push-to-lock, halo
lighting, Accessory, Lock, Off, Run, Start, Column
Lock and Shift Lock (if applicable).
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Fig. 11 Key Cylinder Removal
the park lock dowel pin on the ignition switch
assembly must engage with the column park lock
slider linkage (Figs. 12 and 13).
Verify ignition switch is in lock position (flag is
parallel with the ignition switch terminals). Apply a
daub of grease to flag and pin. Position park lock link
and slider to mid-travel. Position ignition switch
against lock housing face, making sure pin is inserted
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(3) Assemble cover to the column with 3 screws.
Torque screws to 2 N
²
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