1991 MITSUBISHI 3000GT Service Manual

BODY - Power Window42-494. DOOR SWITCH INPUT CIRCUIT
5v
ETACSunit
L
(ECU)
4w
*l : Vehicles without theft-alarm system
“2: Vehicles with theft-alarm systemPassenger doorswitchDriver:oorswitch16FO326Description of operation
When the front door is closed (the door switch is switched OFF), HIGH-level signals are sent to the electronic
control unit; when the front door
is opened (the door switch is switched ON), LOW-level signals are sent to
the electronic control unit.
LElectronic control unit terminal voltage (Connection status of electronic control unit connector)
ECU terminal No. SignalConditionTerminal
voltage
14"'
Driver door switch signalDriver door
Openov
Closed
5V16"'Passenger door switch signal
Passenger doorOpenov
Closed
5V
IO”’Driver door switch signal
and passenger door switchDriver door and/or passenger door Openov
signal
Driver door and passenger doorClosed5v
NOTE“I : Vehicles without theft-alarm system
“2: Vehicles with theft-alarm svstem
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BODY - Power Window
Checking the driver door switch circuit (Disconnect the connector of the electronic control unit’and
check the wiring harness side.)
ECU Terminal Connected to/
No.measured partMeasurement ~~~~e~rionCheck conditionsStandard
14”’
16”’
lo**Driver door switch
Passenger door
switch
Driver door switch
and passenger
door switchResistance
Resistance
Resistance14*‘-ground Driver door16*‘-ground Passenger
door1 O*‘-groundDriver doorand/or
passenger
doorClosedNo continuity
OpenContinuity
ClosedNo continuity
OpenContinuity
ClosedNo continuity
Driver door
andpassenger
doorOpenContinuity
NOTE“I : Vehicles without theft-alarm system
“2: Vehicles with theft-alarm system
Check the individual part
Door switch: Refer to
P.42-41.
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L
/
idBODY
- Power Window
REMOVAL AND INSTALLATION42-51
Cll Door Wlndow Glass Adjustment
18FO205
18FO198Door window regulator assembly removal steps
Door trim (Refer to
P.4241.)Waterproof film (Refer to P.42-41.)1. Delta cover inner
2. Delta cover outer
18FO1996. Delta sash
7. Door window glass
8. Door window regulator assembly
9. Door glass guide track front
10. Door glass guide track rear
Door belt line outer weatherstrip (Refer to
P.42-65.)3. up stop
4. Stabilizer inner frontPower window switch assembly removal steps
Door trim (Refer to P.42-41.)11. Power window switch assembly
5. Stabilizer inner rear
INSPECTION
POWER WINDOW RELAY
(1) Remove .the knee protector assembly.
(Refer to GROUP 52A
- Instrument Panel.)
ow relay from indoorrelaybox.

42-52BODY - Power Window
18FOO6
18FO191(3) Apply battery voltage to terminal 1, and check for continuity
when terminal 3 is grounded.
IContinuity no voltage
c0
Continuity with voltage
00
NOTEO-O indicates that there is continuity between the terminals.
POWER WINDOW MOTOR
(1) Connect the battery directly to the motor terminal and
check that the slider moves smoothly.
(2) Connect the battery in reverse polarity and check that the
slider moves in opposite direction.
CIRCUIT BREAKER (INCORPORATED IN THE POWER WIN-
DOW MOTOR)
(1) Press the UP switch to fully close the
vjindow glass, and
continue to press the switch for 10 seconds.
(2) At the moment that the UP switch is released, press the
DOWN switch. The circuit breaker can be considered good
!if at this time the door window
g!ass begins to open withinL&J60 seconds.
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BODY- Power Window
42-53
POWER WINDOW MAIN SWITCH
Check for continuity in accordance to the following connection
L
Power window passenger’s
Do& lock switch‘Power window driver’sView A side switchlower
window
ock switch18FO107table.
Driver’s
side switch
idNOTEO-O indicates that there is continuity between the terminals
/Doe; lock switch
Power window
switch
View A
18FO108POWER WINDOW SUB SWITCH
Check for continuity in accordance to the following connection
table.
NOTEO-O indicates that there is continuity between the terminals.TSB Revision

42-54
BODY - Door Handle and Latch
DOOR HANDLE AND LATCHM42MDCAREMOVAL AND INSTALLATION
18FOO42
I11.I
I18FOO41
Pre-removal and Post-installationlWO202
Door inside handle removal
Door Inside Handle Play Check (Refer to
P.42-16.)1. Door inside handle
Door outside handle and latch removal steps
2. Door key cylinder unlock switch connector
(Vehicles with theft-alarm system)
3. Door outside handle
4. Ring
5. Door lock key cylinder
6. Door latch assembly
INSPECTION
DOOR KEY CYLINDER UNLOCK SWITCH
The key cylinder unlock switch is normal if there is not
continuity between terminals 1 and 2 when the key is turned
approx. 20” clockwise or counterclockwise from the neutral
position, and there is continuity when it is turned further.
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BODY - Central Door Locking System42-55
Ground ETACS
,611338Nith voltmeterCENTRAL DOOR LOCKING SYSTEM M42ZDAJ
IGNITION KEY REMINDER TROUBLESHOOTING
GUIDE
INPUT CHECK
Using the multi-use tester or voltmeter, check whether or not
the input signals from each switch are being input to the
ETACS unit.
(1) Connect the multi-use tester to the diagnosis check
connector located at the right side of the junction block or
connect the voltmeter between the ETACS terminal and
the ground terminal.
(2) Check if the buzzer of the multi-use tester sounds or the
needle of the voltmeter moves when each switch noted
below is operated.
If the buzzer sounds or the needle moves,. the input signals
are being input to the ETACS unit, so that switch can be
considered to be functioning normally. If not, the switch or
switch input circuit is faulty. Check the switch and the
switch input circuit.
l Door lock actuator
l Door switch
l Key reminder switch
IGNITION KEY REMINDER TROUBLESHOOTING QUICK-REFERENCE TABLE
CENTRAL DOOR LOCKING SYSTEM
Problem
No unlock operation can be made by
pressing door lock knob after
fulfil-ment of following conditions.
l Insertion of key in ignition switch
(key reminder switch OFF)
l Opening of door(door switch ON)Probable causeCheck methodRemedy
Key reminder switchIf found defective afterCorrect harness or
input circuit shortedinput check, check circuit
bench test No. 4
rep:a~~~ key reminder
Key reminder
(P.42-59).switch shorted
Door switch inputIf found defective afterCorrect harness or
circuit brokeninput check, check circuit
replace door switch
bench test No. 5
Breaks in door switch
(P.42-60).Faulty electronic
-Replace the electronic
control unitcontrol unit
NOTE“ECU” (Electronic Control Unit) indicates the ETACS unit
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42-56BODY - Central Door Locking System
CHECKING INDIVIDUAL PART AND CIRCUIT (IGNITION KEY REMINDER SYSTEM)
1. ETACS POWER-SUPPLY AND GROUND CIRCUITS
L-
Batterv
$1,\ .
\I \/ \I
‘/1,\/2-“1
m+,2T.,l\ ,.c.i -
151
Junction block (Multi-purpose fuse)
Jumper connector
ETACS unit(ECU)
“I : Vehicles without theft-alarm system
“2: Vehicles with theft-alarm systemz1116FO314Description of operation
The battery supplies a stabilized 5V power supply to the electronic control unit, via the constant-voltage circuit
and terminal (51) directly connected to the battery. If there is an abnormal condition of the power-supply
circuit, other ETACS functions also will not operate.
Electronic control unit terminal voltage (Connection status of electronic control unit connector)
ECU terminal No. Signal
StatusTerminalvoltage
I
51Electronic control unit power supply
At all timesSystem
voltage
IChecking the ground circuit (Disconnect the connector and check the wiring harness side.)
IIII1Terminal No.Connected to/measured part
MeasurementTesterconnectionCheck conditionsStandard57”’
Electronic control unit ground
Resistance57*‘-groundAt all timesContinuity
59”)59*2-ground
NOTE
“I : Vehicles without theft-alarm system.“2: Vehicles with theft-alarm system
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