MITSUBISHI ECLIPSE 1990 Service Manual

23-34BODY - Seat Belts
CONSTRUCTION OF DRIVING DEVICE
Slid& anchor
Tabe housingIColiar 1
Drum ALock plate
Gear housing
Gear B
Gear AHousing cover
I
lOPO288The component is an assembly supply item, and so
is not to be disassembled. Its construction is,
however, as described below.
Drum A, the lock plate, and gear A are installed to
the motor shaft. The lock plate and gear A rotate thesame as the--motor shaft.
The drum
&ring is attached to drum A. In addition,
the end of the slide anchor’s tape and the end of the
drive spring are also attached to drum A, and these
are wound to drum A.Drum
B is installed to the tape housing by the
torque shaft.
Gear
B is installed to the torque shaft.
The gear
B and gear A teeth mesh.
There are projections on gear
B and drum B; the
gear
B projection contacts the drum B projection
only when gear
B rotates in the clockwise direction.
and in that way the rotational force of gear
B istransmitted to drum B.
I

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.

23-36BODY -Seat Belts
IRCUIT DIAGRAM
Ignition
switch
(IGIlFusible llnk @
-T- --T-
A10“When “When
key iskey isremoved installed
Fusible link @
Buckleswitch
(Automatic seatbelt
control unit connector
terminals)leiease
witch
?r$r’s
0Motor
c,OFF
6
Door latchswitch ’fDr:r’s
Door latchswitch
(Passen-ger’s side)
A?
-f&19*0343

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.

23-38BODY - Seat Belts
Motor (L.H.,
R.H.)
Manual Procedure
Door Latch Switch (L.H., R.H.)
7
nstalled to the quarter panel.
The motor operates to move the slide anchor.t receives direction of rotation, start, and stop signals from the
:ontroi unit. and operates according to these signals.Jote that an automatic seat belt motor relay is installed at the motor.f. due to a malfunction, the slide anchor stops before it reaches the2nd of its travel, note that the slide anchor can also be movednanually by using the hexagonal wrench included with the vehicle.
-ocated at the door latch.
rhese switches detect the open/close condition of the doors.
The following components also constitute the automatic seat belts system.
Ignition Switch (“ON” position)
Kev-reminder Switch
(A. B)
Buzzer
rhis switch sends a High signal to the control unit when the ignition ‘ncorporated within the key cylinder.
“ON” signals are sent to the control unit by switch A while the key is
inserted in the key cylinder; “ON” signals are sent by switch
Bwhen the key is not in the key cylinder.
Located at the rear side of the instrument panel.The power for this buzzer is supplied from the battery through fuse
No. 1.
Note that the buzzer sounds an alarm to warn that the key has beenleft in the ignition.

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)

23-42BODY - Seat Belts
Input Signals
The relationship between input signals (as seen
from the control unit) and the ON/OFF status of the
various switches is as shown in the table below.
When making measurements of voltage, be sure todo so within one minute from the time that
theignition switch is turned to the “ON”, “LOCK” or
“ACC” position.
Input signaldesignation
Ignition switch
Driver’s seat
buckle switch
Driver’s seat outer
3switchAmount of shoulder belt wind-in equals or exceeds theOFFHspecified amount.
Driver’s seat
“fasten” switch
Driver’s seat
“release” switch
Driver’s seat door
latch switch
(“open” side)
Key-reminderswitch
(A)
Key-reminderswitch (B)Front passenger’s
outer switch
cFront passenger’s
“fasten” switch
Front passenger’s
a release m switch
Terminal
No.Switch operation and statusVcv;y
1Ignition switch is switched to “ON”.ONHIgnition switch is switched to “LOCK” or “ACC”.
OFFL
2
Lap belt is fastened.OFFH
Lap belt is not fastened.ION I ilAmount of shoulder belt wind-in is between 0 and the
specified amount.
ONL
4Driver’s door is opened, or belt is fastened.OFFH
Driver’s door is closed, and belt is not fastened.
ONL
5Driver’s belt is in the released condition.
OFFHDriver’s belt is in the unreleased condition.
ONL Y
6
12
13
14
15Driver’s door is closed.
Driver’s door is open.
+
Key is in key cylinder.
Key is removed from the key cylinder.Key is removed from the key cylinder.
Key is in key cylinder.Amount of shoulder belt wind-in equals or exceeds the
specified amount.
Amount of shoulder belt wind-in is between 0 and the
specified amount.
Front passenger’s door is opened, or belt is fastened.
Front passenger’s door is closed, and belt is notfastened.
OFFH I
ONL
ONH
OFFL
ONH
OFFL
OFFH
ONL
OFFH
ONL
16Front passenger’s door is closed, or belt is in the releasedOFFHcondition.
Front passenger’s door is open, and the belt is in theunreleased condition.ONL
,

BODY - Seat Belts23-43
9utput SignalsJhen the input signals change, the signals output
rorn the control unit also change. This relationsihp
; as shown in the table below.
IUZZER OPERATION (TERMINAL No.201
Warning alarm whendriver’s shoulder belt
is not fastened
Warning alarm whendriver’s lap belt is not
fastened
Warning alarm whenkey is left in key
cylinder
Time expiration
Warning alarm whenshoulder belt starts
moving to “release”
sideStatus at input sideIgnition switch
Driver’s door
Driver’s
shoulder belt(“Fasten” switch)
Driver’souter switch
Other than as aboveDriver‘s
lap beltIgnition switch
Other than as above
ON
Closed
E-Yned
OFFNot fastenedOFF-+ ON
*
Other than as above
hh
Other than as above
Shoulder beit
release
Other than as aboveWhen beginsOutput signal waveforms
1
Buzzer
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFFand operation status
Output signal
(ON)I--i
Approx. 6 sec.