ignition MITSUBISHI 3000GT 1991 Service Manual

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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EXTERIOR - Troubleshooting51-5
TROUBLESHOOTING
LWINDSHIELD WIPER AND WASHER
CIRCUIT DIAGRAMIGNITION :
i
ir
FRONT
KmYE7
-I--l--r-I-ii .
@
15A--
----
JUMPER
CONNECTOR
A-11X
Ea
d
53----
1
i4
CT
C-79
S&~DIAGNOSIS
CONNECTOR
EB'p%Jg@
g:f;:[pm1
:X35-AC-R1301-NY.:1
~;x2,--f-l--13L1------ ----- ---- ------ -7 q’,
I i
15:2 $x2
~-fi5
x3lTX2 pi2k%hw, :2~
3r,. I-EIv
s.LIjWl z
COLUMNn11 SWITCH C-113
MITTENTFROiiFRONTI IWIPER RELAYWIPER SWITCIII 1WASHER_SWITCHTI
34
TMSlKHBM
fITCH(ACC)
6LOll"FAST
VARIABLEINTERMITTENTo
WIPER
CONTROL
SWITCH
1 TSB Revision

51-6EXTERIOR - Troubleshooting
FRONT
wm
c
c-29
[ml
FRONT
E%iRr‘(
A-19L
II:C
Iza
C
.---
FRON'IWIPER
SWITCH
*WIPERIGNITIONRELAY SWITCH(ACC)
7
$1
1
7I
I27’
jA -’
I--CII;BRE+lk
5-------
%l:VEHICLES WITHCUT THEFT-ALARM SYSTEUZ2:VEHICLES WITH THZFT-ALARM SYSTEM
1
I
------_
CUITFAKER
-.--I
5
5:CD
d
44 31
1
rEBRMOTOR
A-15TSB Revision

EXTERIOR - Troubleshooting51-7
LOPERATION

l When the wiper switch is placed in the LO
position with the ignition switch in the ACC or
ON position, wipers operate continuously at low
speed.
l Placing the wiper switch in the HI position
causes the wipers to operate at high speed.

l When the wiper switch is placed in the OFF
position, the cam contacts of wiper motor
causes current to flow through the auto wiper
stop circuit, allowing the wiper blades to cycle
before they reach to the stop positions.

l When the washer switch is placed in the ON
position with the ignition switch in the ACC or
ON position, washers operate.
REAR WIPER AND WASHER
OPERATION

/l
i,When the rear wiper switch is placed in the ON
position with the ignition switch in the ACC or
ON position, wipers operate continuously at low
speed.

lWhen the rear wiper switch is placed in the OFF
position, the cam contacts of wiper motor
causes current to flow through the auto wiper
stop circuit, allowing the wiper blades to cycle
before they reach to the stop positions.

lWhen the rear wiper switch is placed in the
INTposition with the ignition switch in ACC or ON
position, the rear intermittent wiper relay is
energized causing the rear intermittent wiper
relay contacts to close and open repeatedly.
lWhen the contacts are closed, the wiper motor
is energized.
lWhen the rear wiper motor is energized, the rear
intermittent wiper relay contacts open; howev-
er, the cam contacts keep the rear wiper motor
energized until the wiper blades return to their
stop position.
LTROUBLESHOOTING HINTS
1. Wipers do not operate.
(1) Washer is not operative, either.
l Check multi-purpose fuse No.
0.l Check ground.
2.Low-speed (or high-speed) wiper operation only
is inoperative.
l Check wiper switch.
3. Wipers do not stop.
l
.Check wiper motor.
l Check intermittent wiper relay.
l Check wiper switch.
4. Washer is inoperative.
l Check washer motor.
l Check washer switch.
NOTEFor information concerning the ETACS control unit,
refer to
P.51-24.TROUBLESHOOTING HINTS
1. Wipers do not operate.
(1) Washer is not operative, either.
l Check multi-purpose fuse No.
@.l Check ground.
2. Low-speed wiper operation only is inoperative.
l Check wiper switch.
3. Wipers do not stop.
l Check wiper motor.
l Check rear intermittent wiper relay.
l Check rear wiper switch.
4. Intermittent wiper operation is inoperative.
lCheck terminal voltage of the rear intermit-
tent wiper relay energized.
(Refer to
P.51-34 for information concerning
the installation position of the intermittent
wiper relay.)
TerminalNo.Voltage
I
Check
2OVRear intermittent wiper
relay or rear wiper switch12v
Rear intermittent wiperrelay0 f-, 12v
-(Normal)(alternating)5. Washer is inoperative.
l Check washer motor.
l Check washer switch
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51-8
EXTERIOR - Troubleshooting
CIRCUIT DIAGRAM
IGNITION IiITCH(ACC)TAILLIC
3
I
F0.
REAR0
INTERMITTENTc15A
IWIPER RELAYI
E-1836
1417
16_----_-----_-- ----__
CL
t1
3
23J&m
0;
3
%x4/X7/\/\
I~
I
I
I
I
I~
I
I
‘4 i
T RELAY
C-82
1
DEDICATEDFUSE
0.85Ld
3 C-69
1
J/Bii+m
d1
8 C-71
L
ii?m
d
8 D-44
3
REAR
LmFi/ILL6
80
I
iim
6 O.------
5
,,8
D-42
-1
RHEOSTAT
2
REAR
iii%~~R
F-15 F-34pLi%Fq2 D-41
idm
d
I
1m
I
REAR
WIPER
MOTOR
F-03
w123
b5-AC-RlJOE-NYTSB Revision

EXTERIOR - Troubleshooting
i.l
L
ELECTRIC REMOTE CONTROLLED MIRRORMSlEBBFCIRCUIT DIAGRAM
BEI
LLIfs
9LF?
PWATED
1
@iOA
w&
:ERIGNITIONSWITCH(ACC)-I
d
4
J/B
@ ::::15A
9
C-82
m
$i$iiq
:I1I’II
,IIIIIIII
IttI
1II,I
IIII
IIIt,
---------------------2 2
f
D-42
'-14
7
83296m9
-?;'9:c:a > c3> u,
REMOTEfjI#;"o;LLE'
EFti
tIL-------------q+1~-I~---------------------)L13w
.D-43 ‘1'8--- ---- ------------------ +’'7at2 D-41
/liRmqtI.) El::
:
1
(LH)(RH)
REMOTEiy;;I$)LLED:l:VEHICLES WITH MIRROR HEATERKXS-AC-R13C3-NYX2:VEHICLES WITHOUT MIRROR HEATEFOPERATION
l When the remote controlled mirror switch is
operated while the ignition key is in “ACC” or
“ON” position, current flows through fuse No.@ remote controlled mirror switch, remote
controlled mirror,remote controlled mirror
switch, and ground, causing the mirror to move.TROUBLESHOOTING HINTS
Neither right nor left mirror operates
1) Also cigarette lighter does not operate
l Check multi-purpose fuse No.
0.2) Cigarette lighter operates
l Check remote controlled mirror switch.
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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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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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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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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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