Circuit Operation
The body control module generates a chime in order to provide the following
warnings:
Lights On Warning
The body control module (BCM) will sound the lights on warning
when the BCM senses all of the following conditions:
| • | The ignition switch is in the OFF, LOCK or ACCY position. There
is no voltage at circuit 39 to the BCM ignition positive voltage input. |
| • | The park lamps or headlamps are on. Voltage is applied through
circuit 9 to the BCM park lamps input. |
| • | The driver door is open. Ground is applied from G200 through circuit
750, the left side door lock and circuit 745 to the BCM driver door open input. |
Ignition Key Warning
The Body Control Module (BCM) will sound the ignition key warning
when the BCM senses all of the following conditions:
| • | The ignition switch is in the OFF, LOCK or ACCY position. There
is no voltage at circuit 39 to the BCM ignition positive voltage input. |
| • | The ignition key is in the ignition switch. Ground is applied
from G200 through circuit 650, the ignition key warning switch and circuit
80 to the BCM key ignition signal input. |
| • | The driver door is opened. Ground is applied from G200 through
circuit 750, the left side door lock and circuit 745 to the BCM driver door
open input. |
Fasten Belts Warning
The body control module (BCM) will sound the fasten belts warning
for 4-8 seconds and illuminate the fasten seat belt indicator
when the BCM senses both of the following conditions:
| • | The ignition switch is in the RUN, BULB TEST or START position.
Voltage is applied through circuit 39 to the BCM ignition positive voltage
input. |
| • | The driver's seat belt is unbuckled. Ground is applied from G200
through circuit 650, the seat belt switch and circuit 238 to the BCM seat
belt switch signal input. |
If the driver seat belt is buckled before the ignition switch is turned
to the RUN, BULB TEST or START positions the following situations will occur:
| • | The fasten seat belt warning will be disabled. |
| • | The fasten seat belt indicator will not illuminate. |
If the driver seat belt is unbuckled, the fasten seat belt indicator
will remain ON for approximately 70 seconds. The indicator turns off
immediately if the seat belt is buckled.
