wiring MITSUBISHI 3000GT 1991 Owner's Guide

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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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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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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51-10EXTERIOR - Service Adjustment Procedures
68FOO51
Multl-use tester
,SERVICE ADJUSTMENT PROCEDURES
INSPECTION OF ACTIVE AERO SYSTEM
1. INSPECTION BY WARNING LIGHT
d!Turn the ignition switch from “OFF” to “ON” to see if the
warning light is lit for approx. three seconds and then goes
out. If not, replace the control unit.
NOTE
(1) The active aero control unit has a self-check function
which is designed as follows: Turn the ignition switch
from “OFF” to “ON”. If the unit is in normal condition,
the warning light is lit for approx. three seconds and
then goes out.
(2) If the front venturi skirt does not return to the standard
condition properly in normal use, the warning light
comes on
2. INSPECTION BY ACTIVE AERO SWITCH AT AUTO 2
(1) With the vehicle stopped, insert the key in the ignition
key cylinder.
(2) Set the active aero switch to AUTO 2 to make sure that
the active aero system is placed in the operative
condition and the indicator light comes on. Then turn off
the active aero switch to confirm that the system
LCJreturns to the standard condition and the indicator light
goes out.
(3) If there is abnormality, check the following parts.
l Active aero switch
l Lighting monitor switch
l Air dam link assembly and rear spoiler
l Wiring harness
3. INSPECTION WITH MULTI-USE TESTER
Using pseudo vehicle speed input function of the multi-use
tester, inspection can be made by means of vehicle speed.
(1) Set the multi-use tester to the diagnosis connector.
(2) Turn the ignition switch to “ACC” or “ON”.
(3) Place the active aero switch to AUTO 1.
(4) Using the multi-use tester, increase the vehicle speed
to approx. 80 km/h (50 mph) or more to make sure that
the active aero system is placed to the operative
condition. Then decrease the vehicle speed to approx.
50 km/h (30 mph) or less to confirm that the system
returns to the standard condition.
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EXTERIOR - Windshield Wiper and Washer51-25
TROUBLESHOOTING QUICK-REFERENCE TABLE
INTERMITTENT WIPERSProblem
The wipers don’t operate when
the wiper switch is set to the
“INT” position.
[The wipers do operate, however,
when the wiper switch is set to
the “1” (low speed) position.]Probable cause(s)Checking procedureRemedy
Damage or disconnectionIf a malfunction is discov-
of the wiring of the wiperRepair the wiring
har-ered as a result of the
switch
(“INT”) inputness, or replace the
checking of the inputcolumn switch.
circuit.(P.51-24). conduct check
No. 2 (P.51-28) of the
Damage or disconnectionindividual part and
of the wiring of the wipercircuit.
switch
(“INT”).Damage or disconnectionIf a malfunction is discov-
of the wiring of theRepair the wiring
har-ered as a result of theness.
ignition switch input
circuit.checking of the input
(P.51-24). conduct check
No. 1 (P.51-27) of the
individual part and circuit.
Damage or disconnectionConduct check No. 4Repair the wiring
har-of the wiring of the wiper(P.51-30) of the individualness, or replace the
relay activation circuit.part and circuit.column switch.
Malfunction of the wiper
relay.
The wipers don’t stop when
the wiper switch is OFF.
IThis problem occurs at the low;p;$ of the wipers.)
If the wipers continue operating{without stopping) at the “2”
sosition (high speed) of the
uiper switch, there is a
short-circuit in the circuit at the
Ylviper motor high-speed side.
JVhen the wiper switch is set to
the “INT” position, the wipers
operate continuously at low
speed, not intermittent
operation.
IThe wipers stop, however, when:he wiper switch is set to
“OFF”.)
The intermittent time does not:hange when the intermittent
Jariable volume switch setting
s changed.Malfunction of the
elec--Replace the electronic
tronic control unit.control unit.
Short-circuit in the wiperIf a malfunction is discov-
switch
(“INT”) inputRepair the wiring har-ered as a result of theness, or replace the
circuit.checking of the inputcolumn switch.
(P.51-24). conduct check
Short-circuit in the wiperNo. 2 (P.51-28) of the
switch (“INT”).individual part and circuit.
Short-circuit in the wiperConduct check No. 4Repair the wiring
har-relay activation circuit.(P.51-30) of the individualness.
part and circuit.
Malfunction of the elec-
-Replace the electronic
tronic control unit.control unit.
Short-circuit in the wiperIf a malfunction is discov-Repair the wiring
har-switch
(“INT”) inputered as a result of theness. or replace the
circuit.checking of the inputcolumn switch.
(P.51-24). conduct check
Short-circuit in the wiperNo. 2 (P.51-28) of the
switch (“INT”).individual part and circuit.
Malfunction of the elec-
-Replace the electronic
tronic control unit.control unit.
Damage or disconnectionIf a malfunction is discov-Repair the wiring
har-of the wiring of the inter-ered as a result of theness, or replace the
mittent variable volumecolumn switch.
switch input circuit.checking of the input
(P.51-24). conduct check
No. 3 (P.51-29) of the
Damage or disconnection
of the wiring of the inter-individual part and circuit.
mittent variable volume
switch.
Malfunction of the
elec-tronic control unit.-Replace the electronic
control unit.
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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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51-28EXTERIOR - Windshield Wiper and Washer
2. WIPER SWITCH
‘ANT” INPUT CIRCUIT
Iin,Ullnl,,en, ll”lC I”,CI”,IIdctcclion CIICUI,
5v
i-i
7 ;;:2
A3II--
ETACS unrt‘,ij I
Wrperswitch
Lolumn switch
” J/B
“I : Vehicles without theft-alarm system“2: Vehicles with theft-alarm system16FO320
Operation Description
L+,When the wiper switch is set to the “INT” position, LOW-level signals are input to the electronic control unit;
the intermittent time interval detection circuit is then activated, and the wipers operate at the intermittent
time interval according to the setting of the intermittent variable volume switch.
Electronic Control Unit Terminal Voltage (Connection Status of Electronic Control Unit Connector)
ECUterminal No.
9”’
1 1 *2
Signal
Wiper switch “INT” signalStatus
Wiper switch “OFF”Wiper switch “INT”
Terminal
voltage
5Vov
Checking the Wiper Switch
(“INT” Position) Circuit (Disconnect the ECU Connector and Check at the
Wiring Harness Side.)
ECUConnected to/measured
terminal No.componentMeasurement TesterconnectionCheck conditionsStandardWiper switch “INT”
No continuityChecking Individual Part
Wiper switch: Refer to
P.51-33.
NOTE
*l : Vehicles without theft-alarm system
“2: Vehicles with theft-alarm system
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EXTERIOR - Windshield Wiper and Washer
3. INTERMITTENT VARIABLE VOLUME SWITCH INPUT CIRCUIT51-29
ETACSunit (ECU)Xi
i-7 II Column switch
JIB
*l : Vehicles without theft-alarm system
“2: Vehicles with theft-alarm systemA-16FO321
eiOperation Description
This circuit functions to input (to the intermittent time interval detection circuit of the electronic control unit)
the set value of the intermittent variable volume switch.
Electronic Control Unit Terminal Voltage (Connection Status of Electronic Control Unit Connector)
ECU terminal No.
SignalStatusTerminal
voltage
13”’
15*2Intermittent variable
volume switch signalIntermittent variable volume switch“FAST” -+ “SLOW”0 + 2.5V
Checking the Intermittent Variable Volume Switch Circuit (Disconnect the Connector of the Electronic
Control Unit and Check at the Wiring Harness Side.)
ECUterminal No.
13”’
15*2
Connected to/measured
component
Intermittent variable
volume switchMeasurement TesterCheck conditionStandardconnection
Resistance
13*‘-ground“FAST” + “SLOW”O+ IkS1(Should change in
1 S*‘-groundaccordance with
changes of the inter-
mittent variable
volume.)Checking Individual Part
Intermittent variable volume switch: Refer to
P.51-33./
idNOTE
“1: Vehicles without theft-alarm system
“2: Vehicles with theft-alarm system
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EXTERIOR - Rear Wiper and Washer
51-3718N007F
jINTERMITTENT WIPER RELAY
(1) Remove the quarter trim. (Refer to GROUP 52A
- Trims.)
(2) With the intermittent wiper relay connected to the wiring
harness connector, let the wiper operate intermittently and
check the voltage at terminal
0.WASHER MOTOR
(1) When the washer motor is inspected, make sure that it is
mounted on the washer tank and that the washer tank is
filled with water.
(2) Connect the battery as shown to check whether water is
pumped out.
SERVICE POINT OF INSTALLATION
2. INSTALLATION OF WIPER ARM
After assembling the wiper blade to the wiper arm, install
the wiper arm with its tip positioned along the ceramic part.
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