1991 MITSUBISHI 3000GT lock

42-46BODY - Power Window
2.IGNITION SWITCH INPUT CIRCUITS
BatteryFusible link
20B-Y. ;I II II I ] II ,;rLL30A,l ‘\m 1 2 34 5 6
25
3:6Pz
z03I
=7\-7
Junction block@ (Multi-purpose fuse)
1
ETACS unit(ECU)
4,
m“1 : Vehicles without theft-alarm system“2: Vehicles with theft-alarm system16FO312Description of operation
A condition for operation of this system is the sending of HIGH-level signals to the electronic control unit
when the ignition switch is switched to the “ON” position.
Electronic control unit terminal voltage (Disconnect the connector of the electronic control unit and
check the wiring harness side.)
ECU terminal No. Signal
52Ignition switch: “ON”ConditionIgnition switchOFF
ON
Standardov
System
voltageChecking the individual part
Ignition switch: Refer to GROUP 54
- Ignition Switch.
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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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BODY - Central Door Locking System42-57
2. DOOR LOCK ACTUATOR INPUT CIRCUIT
L
ETACS
unit (ECU)
Fusible link @
Junction block
(Multi-purpose fuse)
r7‘?r p O.BBBI
“1 : Vehicles without theft-alarm system
“2: Vehicles with theft-alarm systemU-U16(RI-U16FO316
‘IL/Description of operation
If the door is opened with the ignition key inserted and then locking is made by means of inside lock knob, the
door lock actuator is brought to the OFF position, sending H signal to the electronic control unit.
This signal operates the timer. circuit of the electronic control unit and the driving circuit operates to actuator
all the door lock actuators.
Electronic control unit terminal voltage (Connection status of electronic control unit connector)
ECU terminal No. Signal
ConditionTerminal
voltage
ll”,13”’ (LH)Door lock actuator switchDoor lock actuator switchsignalLock (OFF)5v
12”‘. 14”:’ (RH)Unlock (ON)ov
Door lock actuator switch circuit test (Disconnect the connector of the electronic control unit and
check the wiring harness side.)
ECU TerminalConnected to/No.measured partMeasurementTester
connectionCheck conditionsStandard
Door lock actuator
ll*‘, 13”’ (LH) switch signalResistance11 *‘-groundDoor lockLock (OFF)12*‘-groundactuator switchNo continuity
12”‘. 14”’ (RH)13*:-ground14*‘-groundUnlock (ON) Continuity
NOTE*1 : Vehicles without theft-alarm system
“2: Vehicles with theft-alarm systemChecking the individual part
Door lock actuator: Refer to
P.42-62.
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42-58BODY - Central Door Locking SystemI3. DOOR LOCK POWER RELAY ACTIVATION CIRCUIT
Fusible link 0
“I : Vehicles without theft-alarm system“2: Vehicles with theft-alarm system
Door lockactuator:
(LH)
‘d
Door lockactuator(RH)16FO329’Description of operation
If the door is opened with the ignition key inserted and then door locking is made, transistor Tr of the
electronic control unit is turned ON to operate the door lock power relay (unlock side) and the door lock
actuator is unlocked.
NOTEBefore locking the front seat passenger door, make sure that the driver door lock actuator is in the LOCK
position. If the driver door lock actuator is in the UNLOCK position, the front passenger door lock actuator
does not operate.
Electronic control unit terminal voltage (Connection status of electronic control unit connector)
ECU terminal No. Signal
ConditionTerminalvoltage
1XI, 3”’Door lock power relaySystem(unlock side) signalAt all times (except when door unlock isin operation)voltage
NOTE“I : Vehicles without theft-alarm system
“2: Vehicles with theft-alarm system
Checking the individual part
Door lock power relay: Refer to
P.42-63.
LJ
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BODY - Central Door Locking System
4. KEY REMINDER SWITCH INPUT CIRCUIT42-59

Fusiblelink@
ETACSunit(ECU)
16FO319
Junction block
(Multi-purpose fuse)
Key reminder
switch
ETACSunit(ECU)
16FO318
bDescription of operation
Insert the key in the ignition key cylinder, and the key reminder switch will be turned OFF, sending H signal to
the electronic control unit. Pulling the key out of the cylinder will turn on the key reminder switch, sending L
signal to the electronic control unit.
If there is any abnormality in the key reminder switch input circuit, abnormal key reminder buzzer will result.
Electronic control unit terminal voltage (Connection status of electronic control unit connector)
ECU terminal No. Signal
ConditionTerminal
voltage60”’
Key reminder switch signalKey is pulled outov
64”’
Key is inserted5v
Checking the key reminder switch circuit (Disconnect the connector of the electronic control unit and
check the wiring harness side.)
Terminal No.Connected to/measured partMeasurementTesterconnectionCheck conditronsStandard60”’
Key reminder swatchResistance60*‘-groundKey is pulled outContinuity
Key is insertedNo continuity
NOTE“I : Vehicles without theft-alarm system*2: Vehicles with theft-alarm system
/Checking the individual part
’Key reminder switch: Refer to GROUP 54 - Ignition Switch.
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