1990 MITSUBISHI ECLIPSE battery

FUEL SYSTEM -Auto-cruise Control System14-73IF MAIN SWITCH
IS SWITCHED OFF
‘*‘hen the driver switches OFF the MAIN switch,
Jconductivity to the electromagnetic clutch is
interrupted, the clutch plate is returned from the
electromagnetic clutch side to the ring gear side by
the spring, thus freeing the spring.
When the ring gear becomes free, the planetary
pinion, carrier, selector drive shaft and selectorbecome free relative to the sun gear (DC motor),
and the selector is returned to the original position
by the return spring installed to the selector.
The planetary pinions
turn on their own axes while
rotating around the sun gear because of the rotation
of the carrier. As a result, the ring gear idles. All this
results in the cruise control being canceled.
DCSelector drive shaft
IF CANCEL SWITCH IS SWITCHED ON
IBattery
IIIIgnition switch 411IInhibitor switch
f’ J
r--
if-Starterz _Auto-cruise
f
AA)\AA
5V
pF p
+ i%zv)
5-VComl
Cancel interface circuit
bs- Tts ec
I
r-
[ON
NC: Normally closed
NO: Normally opened
‘OFF OFF
IMicrocomputer

14-74
_ ,.-..FUEL SYSTEM
- Auto-cruise Control System
When Canceled by the Stop Light Switch (broad
solid-line arrows)
The stop light switch is a four-pole type that
integrates the switch for the stop light (NO) with
that for the auto-cruise control (NC).
When the brake pedal is depressed, the contacts forthe auto-cruise control (NC) open, cutting off the
circuit to energize the electromagnetic clutch coil.
At the same time, the contacts for the stop light
(NO) close to allow a cancel signal to be input from
the
12-V power supply of the control unit to the
cancel circuit and to the microcomputer. As a result,the transistor which energizes the actuator electro-
magnetic clutch coil turns OFF and the electro-
magnetic clutch coil grounding circuit is cut off, thus
canceling the auto-cruise control mode.
When Canceled by the Clutch Switch (thin
solid-line arrows)
When the clutch pedal is depressed, the clutch
switch is turned ON and the battery voltage is
applied to the cancel circuit of the control unit. then,a cancel signal is input to the microcomputer.
causing the transistor that energizes the actuator
electromagnetic clutch coil to turn OFF. This results
in the electromagnetic clutch coil grounding circuit
bma$ndge cut off, which cancels the auto-cruise control
When Canceled by the Selector Lever (position“N”) (dotted-line arrows)
When the transaxle control selector lever is placed
in the “N” (neutral) position, the inhibitor switch is
turned ON and, as a result, current flows from the
control unit to the inhibitor switch, starter, and
ground. Then, a cancel signal is input from the
cancel circuit to the control unit, causing the
transistor which energizes the actuator electro-
magnetic clutch coil to be turned OFF. As a result,
the electromagnetic clutch coil grounding circuit is
cut off and the auto-cruise control mode is canceled.Although a small current (voltage 5 V) flows through
the starter, it is not activated.
MAIN switchLIMIT SWITCH
The function of the limit switch is to shut off the flow of current
to the motor and apply an electric brake to quickly stop the
motor if the throttle valve becomes either fully open or fully
closed, thus preventing problems which might be caused by an
overload of the motor.
The illustration at left shows the condition of the limit switch
when the throttle valve is fully closed, indicating that
.limitswitch
(1) is in the OFF and the RELEASE circuit is being
deenergized.
IAutocruisecontrol unit
07Aool'
.-

- -----.--..
14-76FUEL SYSTEM -Auto-cruise Control System
Ignition switch
IGI
9
RESUActuator electro-
Microcomputer
1 T 1
rn’Auto-cruise control unit
Autocruisecontrol switch
IGlMAIN
;FF -+++&Control unit
power supply
terminal voltage
03AO264NC: Normally closed
07*0040
AUTO-CRUISE CONTROL SWITCH
The auto-cruise control switch is built into the steering column
switch.MAIN SWITCH
The MAIN switch is an automatic reset type switch to turn ON
and OFF the power supply of the control unit.
COMMAND INPUT SWITCHES (SET and RESUME)
The SET and RESUME switches function to input the control
signals of the auto-cruise control system; both are the
automatic-reset type.
These switches are ON while pressed and OFF when released.
For the ECU’s input interface, each of the input terminals is
pulled up by the battery voltage; the terminal voltage is LOW
level
(OV) when the switch is ON, and is HIGH level (about 12V)when the switch is OFF. These voltage changes (digital
sig*)are input to the microcomputer as ON and OFF signals
o.:
switches.
.

AUTOMATIC TRANSAXLE - Transaxle ControlSELF-DIAGNOStS SYSTEM
The transaxle control unit has self-diagnosis function.
Self-diagnosis codes can be read by connecting a voltmeter to the
diagnosis connector on the side of the junction block.
0: Ground
6%: ELC-MIT
Self-diagnosisThere are 25 diagnosis items, including those items
indicating normal conditions; a maximum of
10items can be stored in memory in the order that
they occur. The memory is supported by a power
supply directly connected to the battery so that it isretained even after the Ignition switch is turned to
the off position.
To clear the memory once an inspection has been
completed. keep negative
(-) terminal of the
battery disconnected for
10 seconds or longer.
r
No.
23
24
Output code
Display pattern
TDiagnosis itemRemarks
NormalAbnormal increases of throttle position
sensor output
Abnormal decrease of throttle position
sensor output
Poor adjustment of throttle position sen-
sorOpen circuit in oil temperature sensor
Once this occurs, output is re-
garded as 2.5 V.Once this occurs, output is re-
garded as 2.5 VOnce this occurs,
oil temperature isregarded as 80°C (176°F).

BODY - Central Door Locks23-21
IBattery
1IJDoor lock 4Door lockactuator t(left side)actuator
(right side) -Battery
Init !,WF%;$TlON OF THE CENTRAL DOOR

When the doors are locked (by using the inside lock
knobs or the door key), the door lock switch
(incorporated within the door lock actuator) is
switched OFF, and then, because current flows to
the fuse, as well as to the door-control unit and the
lock timer, the lock timer causes base current to
flow to
TrI for 0.5 second, thus switching ON Tr,. As
a result, current flows to the fuse, as well as to the
“lock” side coil of the door lock relay,
Tr,, and to
ground, thus switching ON the “lock” side contacts
of the door lock relay and activating the door lock
actuators, thereby locking the doors.

When the doors are unlocked (by using the inside
lock knobs or the door key), the door lock switch
(incorporated within the door lock actuator) is
switched ON, and then, -because current flows to
the fuse, the door-control unit and the lock timer,
the lock timer causes base current to flow to
Tr? for
0.5 second, thus switching ON
Tr7. As a result,
current flows to the fuse, as well as to the “unlock”
side coil of the door lock relay,
Trp, and to ground,
thus switching ON the “unlock” side contacts of the
door lock relay and activating the door lock
actuators, thereby the doors.
(left side)(right
side) -

23-22BODY - Power Windows
POWER WINDOWS
R’1Power windows are equipped in order to facilitate
A lock switch is provided at the power windows’
the opening and closing of the door glass. The
main switches; when the lock switch is ON, the
driver’s seat switch incorporates a one-touch open
mechanism that causes the driver’s door window towindow cannot be opened or closed by using the
main switch for the front passenger seat window.
open completely once the switch is pressed all the
way, even if it is released immediately.Furthermore, at this time none of the sub switches
can be used for opening or closing the windows,
Main switch
CIRCUIT DIAGRAMIgnition
Battery switch
l-l-
’ 1Fuse ’
Z*,“““”CrPower window main switch
-*W(WlI. _;:
r-
L
--e.
.
I
ELnA
I
Powerwindow
subswitch
(R.H.)
I IOne-touch down (open) circuit
--P’-‘-,
-

BODY - Power Windows23-23
IBatterv
---IBatteryOPERATION OF THE POWER WINDOWS

1. When the switch is operated, contacts “b” and
“c” at the “DOWN” side are caused to connect.
and current flows from the battery to contact
“b”, contact “c”,the motor, contact “c”‘,
contact “a”‘,
resistor R and to ground, and, as aresult, the motor rotates to the “DOWN” side.
2.Current from contact “b” and contact “c” flows
through diode
DI and R.; then I% and I%, and R,and
R7, cause reference voltage to be applied to
the negative
(-) side of IC and the positive (+)
side of
G. The reference voltage is maintained
at a certain fixed level by the
ZD.3. During the time that the motor is in operation,
the amount of current flowing to the motor is
not very much, and, because the voltage
(ICcomparison voltage) at point A is lower than the
reference voltage at the negative
(-) side of IC,,the output voltage of
IC becomes low. For G,because the voltage
(G comparison voltage) at
the negative
(-) side becomes lower than the
reference voltage at the positive (+) side, the
output voltage of
lC2 becomes high, and the
transistor
(Tr) is switched ON.
4. Because the transistor
(Tr) is switched ON,
current also flows from diode
D1 to the coil (L).thus causing excitation of the coil
IL), with the
result that the switch is held by the plunger.

1. When the glass reaches the lowermost point,
the amount of current flowing to the motor
increases, and the voltage applied at point A also
increases.2. When the voltage
(IC comparison voltage) at
the positive
(+) side of IC becomes higher than
the reference voltage at the negative
(-) side,
the output voltage becomes higher but voltage
is prevented from being applied momentarily to
the negative
I-) side of ICI by resistor R6 and the
capacitor
0.This is a delay circuit that delays the time that
the transistor
(Tr) will be switched OFF when
the output voltage of
IC, becomes low, so that
the glass is correctly opened to its full extent.
The motor operates for 0.7 second after the
glass reaches its lowermost position.

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.