Fasten seat belt lamp or tone continue for more
than 10 seconds after seat belts are fastened and
ignition ON.
(1) Use DRB lllt scan tool to perform PCI bus
diagnostics on BCM for battery and ignition switch
input.
(2) Inspect the BCM connectors and wires for
proper connection.
No tone when headlamps are on, ignition switch
is OFF and driver’s door is open.
(1) Using a DRB lllt scan tool, check drivers door
ajar switch for good ground when driver’s door is
open.
(2) Use DRB lllt scan tool to perform PCI bus
diagnostics on BCM for battery, ignition switch input,
headlamp switch and driver’s door input and Chime
Output Test.
(3) Inspect BCM connectors and wires for proper
connection.
(4) Check for battery feed at terminal J1-7 of BCM
connector.
(5) Check headlamp switch.
No tone when key is left in ignition. Ignition
switch is in the OFF position and driver’s door is
open.
(1) Using a DRB lllt scan tool, check drivers door
ajar switch for good ground when driver’s door is
open.
(2) Use DRB lllt scan tool to perform PCI bus
diagnostics on BCM for battery, ignition switch input,
key-in-switch and driver’s door input and Chime Out-
put Test.
(3) Inspect BCM connectors and wires for proper
connection.
(4) Check for battery feed at terminal J1-7 of BCM
connector.
(5) Check key-in switch.
Chimes continue when headlamps are turned off
and/or key is removed from ignition.
(1) Use DRB lllt scan tool to perform PCI bus
diagnostics on BCM for headlamp or key-in-ignition
inputs.
(2) Check wiring for a grounded condition between
key-in switch and BCM.
(3) Inspect the BCM connectors and wires for
proper connection.
EXTERIOR LAMPS LEFT ON
To test the headlamps left on function, remove the
ignition key, turn exterior lamps on with driver’s
door open. Chime should sound until headlamps are
turned off or drivers door is closed.
FASTEN SEAT BELTS
To test the fasten seat belt function, start with the
ignition switch in the OFF position. Turn the ignition
switch to the ON position with the driver’s seat belt
unbuckled. The seat belt warning lamp should light
for 4 to 8 seconds and the tone should sound 4 to 8
seconds.
KEY LEFT IN IGNITION
To test the key left in ignition function, the ignition
switch must be in the OFF position with key in the
ignition switch. The driver’s door must be open. The
chime should sound until key is removed from igni-
tion switch or drivers door is closed.
REMOVAL AND INSTALLATION
BODY CONTROL MODULE REMOVAL
Refer to Group 8E, Instrument Panel and Systems
for Removal and Installation procedures.
HEADLAMP SWITCH
Refer to Group 8E Instrument Panel and Systems,
for Headlamp Switch Removal and Installation.
SEAT BELT BUCKLE
Refer to Group 23, Body for Seat Belt Buckle
Removal and Installation procedures.
KEY-IN SWITCH
The Key-in switch is built into the ignition switch
assembly. Should the Key-in switch require service,
the ignition switch assembly must be replaced. Refer
to Group 8D, Ignition System for service procedures.
LH CHIME/BUZZER WARNING SYSTEMS 8U - 3
DIAGNOSIS AND TESTING (Continued)
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