The body control module (BCM) controls the audible warnings. Refer to
Body Control System Operation
in Body Control System
for more information.
Audible Warnings Description
The body control module (BCM) controls the following reminders:
| • | Key in ignition reminder:
An audible
warning intended to remind the driver that the key has been left in the ignition
cylinder. The BCM sounds the chime for this reminder at a rate of 150 chimes
per minute. |
| • | Fasten seat belt reminder:
An audible warning intended to remind the driver at the beginning of the driving
cycle that the driver's seat belt is unfastened. The BCM sounds the chime for
this reminder at a rate of 50 chimes per minute. |
| • | Fasten belts indicator control:
A visual warning intended to remind the driver that the driver's seat
belt is unfastened. |
| • | Parking brake reminder:
An
audible warning intended to remind the driver that the parking brake has been
left applied with the transaxle shifted out of PARK. The BCM sounds the chime
for his reminder at a rate of 200 chimes per minute. |
| | An audible warning intended to remind the driver that the turn signal has been
left on while the vehicle has traveled over 1.2 km (0.75 mile).
The BCM sounds the chime for this reminder at a variable rate (in unison
with the turn lamps on) of 90 chimes per minute. |
| • | Headlamps ON reminder:
An audible
warning intended to remind the driver that the headlamps have been left
on. The BCM sounds the chime for this reminder at a rate of 200 chimes
per minute. |
| • | Last door closed locking confirmation:
An audible warning intended to provide the driver feedback that the
last door closed locking feature is active. The BCM sounds the chime for this
remainder at a rate of 200 chimes per minute. |
| • | Feature customization and diagnostics feedback:
An audible feedback used when changing feature customization modes. This
is also used by service technicians during the BCM diagnostics. The BCM sounds
the chime during the feature customization, and also during diagnostics.
Refer to
Diagnostic Starting Point
in Body
Control System for additional information. |
Key In Ignition Reminder
The BCM sounds key in ignition reminder when the following conditions are met:
| • | The driver's door is open (ground signal in circuit 49). |
| • | The key is fully inserted in the ignition cylinder (ground signal in
circuit 80). |
| • | The ignition switch is in the off position or the accessory position. |
Fasten Seat Belt Reminder
The BCM sounds the fasten seat belt reminder ON for 6 (+/-2) seconds
when the following conditions are met:
| • | The ignition switch is turned from the off position to the on position,
or from the start position to the on position. |
| • | The driver's seat belt is unfastened (ground signal in circuit 238). |
If the driver's seat belt is fastened, then unfastened within 6 seconds
chime period, the BCM stops the chime while the driver's seat belt is fastened.
The BCM resumes the chime for reminder of 6 second period if the driver's
seat belt is unfastened.
Fasten Belt Indicator Control
The BCM sends a request to the instrument cluster via Class 2 serial
data link to turn on the fasten belts indicator for 75 (+/- 7.5) seconds
when the following conditions are met:
| • | The ignition switch is on. |
| • | The driver's seat belt is unfastened (ground signal in circuit 238). |
If the driver's seat belt is fastened during the 75 second period, the
BCM sends a request to the instrument cluster via Class 2 serial data link
to turn off the fasten belts indicator. The BCM sends a request to the instrument
cluster to turn on the fasten belts indicator for 75 (+/- 7.5) seconds
(repeating this sequence) if the driver's seat belt is unfastened during the same
ignition cycle. The instrument cluster turns on steadily the fasten belts indicator
lamp during the first 20 seconds, then the fasten belts indicator flashes.
Parking Brake Reminder
The BCM sounds the parking brake reminder when the following conditions are
met:
| • | The ignition switch is on. |
| • | The parking brake switch is closed, sending a ground signal in circuit 1830.
This indicates that the parking brake is set (applied). |
| • | The transaxle is shifted out of PARK or NEUTRAL by sensing a transaxle
range PRNDL signal via the Class 2 serial data link |
Turn Signal Reminder
The BCM sounds the turn signal reminder once per each flash of the turn signal
lights when the following conditions are met:
| • | The ignition switch is on. |
| • | The turn signal switch is in either the left turn position or the right
turn position (sensing, in the past 2 seconds, a turn signal on signal via
the Class 2 serial data link.) |
| • | The vehicle has traveled a distance of 1.2 km (0.75 mile)
by sensing vehicle speed signals via the Class 2 serial data link. |
The BCM keeps active the turn signal reminder until one of the following conditions
is met:
| • | The ignition switch is off. |
| • | The turn signal switch returns to the off position (sensing, in the past
2 seconds, no turn signal signals via the Class 2 serial data link.) |
Headlamps On Reminder
The BCM sounds the headlamps on reminder when the following conditions are
met:
| • | The driver's door is open (ground signal in circuit 49). |
| • | The headlamp switch is in either PARK or HEAD position (open in circuit 1872). |
| • | The ignition switch is in the off position or the accessory position. |
Key in Ignition Switch Input
The BCM interfaces with the ignition key alarm switch. The ignition key alarm
switch grounds circuit 80 when the key is fully inserted in the ignition
switch. The switch opens when the key is removed from the ignition switch. The
BCM uses this input for the operation of the key-in-ignition reminder, lockout
prevention, exit lighting, among other BCM-related features. The ignition key
alarm switch receives ground through circuit 1550.
Driver's Door Ajar Switch Input
The BCM uses this input for the operation of the key-in-ignition reminder and
headlamps on reminder. When the driver's door is open, the door lock switch grounds
circuit 49. Refer to
Interior Lights Circuit Description
in Lighting Systems for more information regarding the driver's
door lock ajar switch input.
Driver Seat Belt Switch Input
The BCM determines when the driver's seat belt is fastened through the seat
belt switch. The seat belt switch opens when the driver's seat belt is fastened.
When the driver's seat belt is unfastened, the seat belt switch closes. This
causes the switch to ground circuit 238. The BCM uses this input for the
operation of the fasten belts indicator lamp and chime reminder.
Park Brake Input
The BCM determines when the parking brake is applied through the park brake
indicator switch. When the parking brake is released, the park brake indicator
switch opens. The park brake indicator switch closes when the parking brake is
applied. This causes the switch to ground circuit 1830. The BCM uses this
input for the operation of the parking brake reminder.
Park Lamp Off Input
The BCM senses a voltage signal through the park lights off input (circuit 1872)
when the headlamp switch is in the PARK position or the HEAD position. The BCM
uses this input for the operation of the headlamps on reminder.
Class 2 Serial Data Link
The BCM determines when the turn signal switch is on, and the vehicle traveled
distance via the Class 2 serial data link. The BCM uses this information
in order to activate the turn signal reminder.
The BCM determines when the transaxle is shifted out of PARK via the Class 2
serial data link. The BCM uses this information in order to activate the park
brake reminder.
The instrument cluster uses the Class 2 serial data link when requesting
the BCM to sound the low fuel reminder.
The BCM uses the Class 2 serial data link when requesting the instrument
cluster to turn on the Fasten Belts indicator lamp.
Refer to
Body Control System Circuit Description
in Body Control System for more information.
