light MITSUBISHI ECLIPSE 1990 Workshop Manual

BODY - Seat Belts23-35OPERATlON OF DRIVING DEVICE
TapeDrive spring
Izz;b3;:,e
tape is
Projectionof drum BDrum B/
When the tape is
wound outMotor
\ /Gear ADrum springi9w2a9When the
Tape is Wound In (when the automa-
tic seat belt is fastened)
(1) When the motor shaft rotates in the clockwise
direction, gear A and the lock plate also rotate in
the same direction. When gear A rotates, gear
Brotates in the counterclockwise direction. In the
counterclockwise direction, there is no transfer
of force from gear
B to drum B.
(2) After the lock plate rotates and the drum spring
within drum A is compressed, drum A rotates.
the tape is wound in, and the slide anchor
moves toward the “fasten” side.
When the Tape is Wound Out (when the auto-
matic seat belt is released)
(1) When the motor shaft rotates in the counter-
clockwise direction, gear A and the lock plate
also rotate in the same direction. When gear A
rotate.S, gear B rotates in the clockwise direc-
tion. In the clockwise direction, the projection of
gear
B contacts the projection of drum B, thus
causing drum
B to rotate.
(2) As a result of the rotation of drum 8, the drive(3) At the same time that the tape is wound into
drum A, the drive spring is also wound in and
drum
B rotates.
(4) The slight difference in the amount of move-
ment of the drive spring and the tape (which
occurs depending on the amount of wind-in at
drum A and drum
B) is absorbed by delaying the
rotation of drum
B relative to the rotation of gear
B.
spring wound to drum A is pulled out, and, at thesame time, the tape is pulled out and the slide
anchor moves toward the “release” side.
(3) The slight difference in the amount of move-
ment of the drive spring and the tape (which
occurs depending on the amount of wind-in at
drum A and drum B) is absorbed by the tension
applied to the tape by the drum spring.

BODY - Seat Belts23-37COMPONENT PARTS AND FUNCTION
4utomatic Seat Belt Control Unit
arter panel
qelease Switch (L.H., R.H.)
‘Fasten”Switch (L.H., R.H.)
uide rail
1SAO310
Seat Belt Warning Light/Reminder Light
Buckle Switch (driver’s seat)
Outer Switch (LH., R.H.)
Located at the quarter panel on the driver’s seat side.The system is controlled based upon various input signals, thereby
regulating motor operation,
warnrng light illumination or continuousflashing, and buzzer sounding.
Located at the front of the guide railThis switch is for turning the shoulder belt drive motor off.
It transmits an “OFF” signal to the control unit when the shoulder
belt is completely unfastened. Once the “OFF” signal is received,
the control unit shuts off the motor.
Located at the rear of the guide railThis switch is for turning the shoulder belt drive motor off.
It transmits an “OFF” signal to the control unit when the shoulder
belt is completely fastened. Once the “OFF” signal is received,
the control unit shuts off the motor.
Located at the combination meter.
This light warns the driver
and/or passenger to fasten his/her seat
belt; it illuminates of flashes by the control unit, and the length of the
illumination or flashing time changes, dependent on which seat belt
is not fastened. (Refer to WARNING SYSTEM)
Located at the driver’s seat belt buckle.This switch transmits an “OFF” signal to the
control unit when the
lap belt is fastened and an “ON” signal when it is not fastened.
Incorporated within the shoulder belt retractor.
This switch detects the amount of shoulder belt wind-in and sends
an “OFF” signal to the control unit if the amount of wind-in is the
specified amount or more. or an “ON” signal if the amount of
wind-in is less than the specified amount.

BODY - Seat Belts23-39
OPERATlON
Belt Fastening Motion
(1) If the belt is not in the fastening position (the
L.H. or R.H. door latch switch at Door Closed
position; the L.H. or R.H. “fasten” switch at
“ON” position) when the door is closed with the
ignition switch in the “ON” position, the belt
automatically moves to the fastening position.
For the period between the initiation and com-
pletion of the belt’s motion in the fastening
direction, the seat belt warning light either stays
lit or blinks.
Belt Releasing Motion
(1) When the belt is not in the release position, the
L.H. or R.H. release switch is in the “ON”
position, and the left or right door is opened, the
belt will automatically move to the release
position if the ignition switch is at either the
“ON”,“LOCK” or “ACC” position.
For the belt at the driver’s seat side moveover,
the belt will automatically move to the release
position if the
key is taken out while the belt is
fastened.
The buzzer sounds for approximately 0.7 secondsince the start of thebelt’s motion.When the belt is completely fastened, the
“fasten” switch is switched OFF and the motor
stops.(2) With a lapse of approximately 60 seconds after
the belt has stopped its fastening motion due to
foreign object wedged in the mechanism, the
protective timer of the control unit is activated
causing the motor output to the shut off.
When the belt completes its releasing motion,
the L.H. or R.H. release switch is turned OFF,
and the motor stops.
(2)If the belt is still in the process of releasing with
a lapse of approximately 60 seconds after the
start of motion, the protective timer in control
unit is activated causing the motor output to be
shut off.
At the same time, the buzzer sounds for
approximately 0.7 second.
Ignitionswitch
(ONI I------(LOCK or ACC) -J
Warning
light
I-6 sec. ’
cWARNING SYSTEM
Warning Alarm when Ignition Switch is Activated
When the ignition switch is moved from the “LOCK” or “ACC”
position to the “ON” position, the warning light illuminates
continuously for approximately 6 seconds.
If, within the time, the ignition switch is moved from the “ON”
position to the “LOCK” or “ACC” position, the warning light
illumination will stop.

23-40BODY - Seat Belts
Door latch
switch
Ignition
switch
(LOCK or
ZjTI
Warninglight
.
F-w4Approx. 6 sec.
~1: Warning alarm when ignition
switch is activated.
r2: Approx. 0.7 sec./cycle
Driver’s side
latch switch
Ignition
switch
(LOCK or
Er:rI
ti Fasten” switch
Driver’s side
(ON) i;outer switch
(OFF)I!
’ III
Buzzer(ON’
(OFF)c
Warning ’light
kprox. 66 sec.’Ignition
switch
(LOCK or zm
zs;;;$s (ON)
side outer
switch(OFFIr
Warninglight
Apprbx.ti sec.Warning Alarm when the Automatic Seat Belt is
no*Completely Fastened (when the slide anchor, during
movement, stops before completion of travel, or when it
moves toward the “fasten” side)
The warning light flashes if the door is closed, the ignition
switch is at “ON” position and the driver’s or front passenger’sseat “fasten” switch is switched ON (unfastened status).
Warning Alarm when the Driver’s Shoulder Belt is not
FastenedWhen, with the driver’s door closed, the ignition switch ON ant
the slide anchor at the “fasten” position (the “fasten” switch is
OFF), the shoulder belt is not fastened (the outer switch is
switched OFF), the buzzer will sound continuously for approx-
imately 6 seconds and, at the same time, the warning light will
‘flash for approximately 68 seconds.
If, however the shoulder belt is fastened (the outer switch is
switched ON) during that period, the warning light and buzzer
will be switched OFF.Warning Alarm when the Front Seat Passenger’s Shoulder
.Belt .is not Fastened
When, with the front seat passenger’s shoulder belt unfas-tened (the outer switch is switched OFF), the ignition switch
i--turned from the “LOCK” or “ACC” position to the “ON
position, the warning light will illuminate steadily for
approx-imately 68 seconds. If, however, the shoulder belt is fastened
(the outer switch is switched ON) during that period, thewarning light will be switched OFF.
I

BODY- Seat Belts*23-41
switchDriver’s
side buckle
switch
Buzzer(ON’ XL(OFF)
,: Approx. 0.7 sec./cycle
Key-reminder (ON)switch (A) (OFF)
Buzzer
19Poo270
Automatic seat belt control unit
connector terminals
lsPo2eeWarning Alarm when the Driver’s Lap Belt is not Fastened
When, with the driver’s lap belt unfastened (the buckle switchis switched ON), the ignition switch is tunrned from the
“LOCK” or
“ACC” position to the “ON” position, the buzzer
will sound intermittently for approximately 6 seconds. If,however, the driver’s lap belt is fastened during that time, the
buzzer will be switched
OFF.
Note that the warning light when the ignition switch isactivated will also illuminate when the ignition switch is turned
from the “LOCK” or “ACC” position to the “ON” position.
Warning Alarm when the ignition Key is Left in the Ignition
The buzzer will sound continuously when all of these condi-
tions occur simultaneously: the key is in the key cylinder
(key-reminder switch A is switched ON), and the ignition
switch is at the “LOCK” or “ACC” position, and the driver’s
door is open (the door latch switch “open” is switched ON).
Warning Alarm when an Automatic Seat Belt Starts to
Move toward the “Release” Side
When the driver’s or front seat passenger’s automatic seat belt
starts to move toward the “release” side, the buzzer sounds
for approximately 0.7 second.AUTOMATlC SEAT BELT CONTROL UNIT INPUT/OUTPUT
SIGNALS
Power Supply and Ground Circuit
INameITerminal No.IVoltage levelI
I Battery (+B)I11I H 1
I Ignition switchI ’ IH or LI
IGroundI7, 17Io.ovI
NOTEH and L in the voltage level column indicate the terminal voltage Of
each signal.H: Battery voltageL:Ground voltage (0.8V or less)

23-44BODY -Seat Belts
WARNING LIGHT OPERATION (TERMINAL No. 10)
Status at input side
VVarning alarm whenlgnition switchOFF 3 ONignition switch is
activated
Other than as above
Warning alarm whenautomatic seat belt
fastening is
incomplete
1 Ignition switch
Driver’s or passenger’s seatION
belt
r;tNfasyed
’(“Fasten” switch, Door latchswitch “close”)
Other than as above
Warninn alarm whenIgnition switch1 ONdriver’sshoulder belt -
is not fastenedDriver’s door
Driver’s shoulder belt
(“Fasten” switch)
Closed
Fastened
(OFF)Driver’s outer switch
Other than as above
OFF
Warning alarm whenfront passenger’s
shoulder belt is not
fastenedPassenger’s outer switch
lgnition
swtich
Other than as above
OFF
OFF+ ON
r
Light
ON
OFF
ON
OFF
ON
OFF
ON
OFF
DRIVER’S SHOULDER BELT FASTENING OPERATION (TERMINAL No.8)Status at input side
Driver’s shoulder belt
is fastened.
‘~
Other than as aboveOutput signal waveforms
and operation status
Output signalFFF,
LJ
(ON)t, +j ‘$;P$
Approx.0.7 sec.
1Output
signal waveforms and operation status
MotorOutput signal
Operates.stops.
(ON).l---l
Max. 60 sec.

-.-
25-6EMISSION CONTROL SYSTEMS- Exhaust Gas Recirculation (EGR) System
OPERATION <California>
The engine control unit functions to calculate the
engine load, based upon the intake air volume
signals (from the air-flow sensor) and the rpm
signals (from the crank-angle sensor), and the
EGRcontrol solenoid valve is activated according to the
engine load. The
EGR amount is then regulated
according to the engine load calculated in this way.maintaining driveability during cold.
When, as a result of clogging of the
EGR cant’valve or as a result of an operational
malfunctio,.,the
EGR flow volume decreases, the EGR gas
temperature downstream. from the
EGR control
valve decreases. The engine control unit functions
to detect the
operation conditions of the EGRLoad
a Intake air volume/Engine rpmsystem by this characteristic.
If, however, the engine coolant temperature is low,
the actuation duty is attenuated, the
EGR control
valve activation negative pressure (vacuum) is
leaked from the throttle body A port, thus reducing
or interrupting the
EGR flow volume and therebyThe temperature of the
EGR gas is detected by the
EGR gas temperature sensor which is equipped at
the
EGR control valve; when the temperature
decreases to a low level, the engine warning light
(malfunction indicator light) illuminates in order to
advise the driver that a malfunction has occurred in
the
EGR system.
EGR
contcEGR control
solenoid valve
/Control
relay
1Engine control unit
Enginewarning
light