1991 MITSUBISHI 3000GT lock

42-60
BODY - Central Door Locking System
5. DOOR SWITCH INPUT CIRCUIT
ETACSunit(ECU)
*1 : Vehicles without theft-alarm system*2: Vehicles with theft-alarm systemPassen&r door
switchDrivergoorswitch16FO326Description 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.
Electronic control unit terminal voltage (Connection status of electronic control unit connector)
’d
NOTE
Driver door and passenger doorClosed5v
“1: Vehicles without theft-alarm system
“2: Vehicles with theft-alarm system
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BODY - Central Door Locking System42-61Checking the driver door switch circuit (Disconnect the connector of the electronic control unit and
check the wiring harness side.)
and passenger
door switch
1O*2
i
NOTE“I : Vehicles without theft-alarm system
“2: Vehicles with theft-alarm systemConnected to/
measured partMeasurement -ff~~e~rionCheck conditionsStandard
Driver doorClosed
Open
Passenger
doorClosed
Open
Driver doorClosedand/or pas-
senger doorNo continuity
Continuity
No continuity
Continuity
No continuity
Driver door
Openand passen-
ger doorContinuity
Check the individual part
Door switch: Refer to
P.42-41.
id
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42-62BODY - Central Door Locking System
REMOVAL AND INSTALLATION16FO196
Door lock actuator removal
Door trim and waterproof film (Refer toP.42-41.)Do&
latch assembly (Refer to P.42-54.)
1. Door lock actuator
18FO205Door lock switch removal
Door trim (Refer to P.42-41.)
2. Door lock switch18FOO52

view A16FOO51INSPECTION
DOOR LOCK ACTUATOR
(1) Place the rod in the LOCK position, apply the battery power
to the terminal
L(3) for driver’s side or (1) for passenger’s
side1 and check to see that when the terminal [(l) for
driver’s side or (3) for passenger’s side] is grounded, the rod
moves to the UNLOCK position.
(2) Then place the rod in the UNLOCK position, apply the
battery power to the terminal [(I) for driver’s side or (3) for
passenger’s side], and check to see that when the terminal
[(3) for driver’s side or (1) for passenger’s side] is grounded,
the rod moves to the LOCK position.
(3) Check to ensure that when the rod is placed in the UNLOCK
position, there is acontinuity between the terminals (2) and
(4). and that when the rod is placed in the LOCK position,
there is no continuity.
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BODY - Central Door Lockina Svstem42-63
:Vehicles with power window>
Dower window main switch side
Power window sub switch side
18FO107DOOR LOCK SWITCH
Check for continuity in accordance to the following connection
table.
Power window main switch side
LOCKIo--+--Q I
UNLOCKII c-+---oL
NOTEO-O indicates that there is continuity between the terminals
Power window sub switch side
1 LOCKIo---+-o I
OFFII
I
1 UNLOCKI c--+--
NOTEO-O indicates that there is continuity between the terminals.

LOCK00
OFF
UNLOCK00
NOTEO-O indicates that there is continuity between the terminals.
DOOR LOCK RELAY
(1) Remove the knee protector assembly:
(Refer to GROUP 52A
- Instrument Panel.)
(2) Remove the door lock relay from indoor relay box.
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42-64BODY - Central Door Locking System
(3) Check for continuity between terminals under the condi-
tions described below.
I.IIIIII
NOTE(I )O-O indicates that there is continuity between the terminals.(2)O---O indicates terminals to which battery voltage is applied.
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51-24EXTERIOR - Windshield Wiper and Washer
WINDSHIELD WIPER AND WASHER
Junctionblock
DiagnosisconnectorA/;
\\ZOFOOl?
GroundETACSWith voltmeter
Diagnosis checkconnectorWith multi-use tester
TROUBLESHOOTING GUIDEINPUT CHECK
\JUsing 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 Ignition switch
l Wiper switch
(INT)l Intermittent variable-volume switch
l Washer switch
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51-26EXTERIOR - Windshield Wiper and Washer
MIST WIPERS/WASHER-INTERLOCKED WIPERS
ProblemProbable cause(s)
Checking procedureRemedy
The wipers do not function when
the washer switch is switched ONDamage or disconnectionIf a malfunction is discov-
of the wiring of the
ered as a result of theRepair the wiring
har-for 0.6 second or longer.
(With the wiper switch at thewasher switch input
circuit.checking of the inputness, or replace the
column switch.
“INT” position, however, inter-
mittent operation of the wipers
is normal, and the washer
function is normal.)
(P.51-241, conduct check
Damage or disconnectionNo.5(P.51-31)oftheindividual part and circuit,
of the wiring of the
washer switch.
Malfunction of the elec-tronic control unit.
-Replace the electronic
control unit.
The wipers do not function whenMalfunction of the elec-
-the washer switch is switched ONtronic control unit.Replace the electronic
for less than 0.6 second.control unit.
(The wipers and washer do func-
tion, however, when the washer
switch is switched ON for 0.6
second or longer.)
NOTE“ECU” (electronic control unit) indicates the ETACS unit.
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EXTERIOR - Windshield Wiper and Washer
CHECKING INDIVIDUAL PART AND CIRCUIT1. IGNITION SWITCH INPUT CIRCUIT51-27
BatteryFusible link
LOCK lgnitlon switch
Junction block
(Multl-purpose fuse)
Jumper connector
i! ~~A$ unit
“I : Vehicles without theft-alarm system
“2: Vehicles with theft-alarm system16FO313
Operation Description
As the condition for operation of the system, HIGH-level signals are sent to the electronic control unit when
the ignition switch is set to the “ACC” or “ON” position.
Electronic Control Unit Terminal Voltage (Disconnect the ECU Connector and Check at the Wiring
Harness Side.)
ECU terminal No.SignalStatusStandard
53Ignition switch (ACC)Ignition switchOFFov
ACCSystem
voltageChecking Individual Part
Ignition switch: Refer to GROUP 54
- Ignition Switch.
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