1991 MITSUBISHI 3000GT relay

42-12
BODY - Troubleshooting
OPERATIONl When the door lock switch is set to the LOCK side (or
UNLOCK side), the LOCK side (or UNLOCK side) of the
door lock relay is turned ON and the door actuators of
alIsadoors operate.
lIf the driver seat side door (or assistant seat side door) is
opened and the driver seat side inside lock knob (or
assistant seat side inside lock knob) is locked with the key
inserted in the ignition switch, the ETACS unit grounds the
unlock side circuit of the door lock relay to unlock all doors.
This way, failure to remove the key is prevented.
NOTEThe door lock actuator contains a PTC thermister to prevent
damage caused by overheating of the motor. If the central
door lock is frequently used, the actuator may temporarily
fail to operate. If it returns to normal in a few minutes, it is
not defective.
TROUBLESHOOTING HINTS
1. One of the door lock actuators fails to operate.
l Check the door actuator which fails to operate.
2. The ignition key reminder system does not function.
l For information concerning ETACS control, refer to
P.42-55.

BODY - Power Window42-43
/;i
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Diagnosis connector-Gr&nd
ETkCS ‘6R”38
Nith voltmeter-.___
1Withmulti-use tester
POWER WINDOWM42MHAH
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.
(I), 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 Door switch
TROUBLESHOOTING QUICK-REFERENCE TABLE
For information concerning the locations of electrical components, refer to
P.42-51.
ProblemThe power windows do not operateNhen
the ignition switch is at the“ON” position.Probable cause
Damaged or discon-netted wiring of the
ignition switch input
circuitCheck method
If a malfunction is in-dicated as a result of
checking the input
signals, check by fol-
lowing individual part
and the circuit check
No. 2 procedures(P.42-46).Remedy
Repair the wiring
harness.
Damaged or discon-Check by following
in-Repair the wiring har-
netted wiring of thedividual part and theness, or replace thepower window relaycircuit check No. 3power window relay.
activation circuitprocedures (P.42-47).
Malfunction of the
-Replace the electron-electronic control unitic control unit.
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42-44
BODY - Power Window
Problem
Probable causeCheck method
Remedy
The power windows can be opened
and closed immediately after theDamaged or discon-If a malfunction is
in-netted wiring of thedicated as a result ofRepair the wiring har-ignition switch is switched “OFF”, butfront door switch
checking the inputness. or replace the
the power window operation doesfront door switch.
not stop if a front door is openedinput circuit
signals, check by
follow-within 30 seconds.Malfunction of theing individual part and
the circuit check No. 4
front door switch
procedures
(P.42-49).Malfunction of the
-electronic control unitReplace the electron-ic control unit.
The opening and closing operations
of the power windows are possible
after the timer operation time has
elapsed when the ignition switch
is set to the “OFF” position.Short-circuit of the
power window relay
activation circuit
Malfunction of the
front door switchCheck by following
in-dividual part and cir-cuit check No. 3
pro-cedures (P.42-47).Repair the wiring
har-ness, or replace the
power window relay.
Malfunction of the
electronic control unit
-Replace the electron-ic control unit.
NOTE“ECU” (electronic control unit) indicates the ETACS unit.
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BODY - Power Window
;. POWERWINDOW
RELAYACTIVATION CIRCUIT
Fusiblelink @
R-B0
&5
____-------
y3"4
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Power window
One-touchdnwn circuit
L-
*I : Vehicles without theft-alarm system“2: Vehicles with theft-alarm systemPower window
sub-switch16FO324TSB Revision

42-48BODY - Power Window
Description of operation
When the ignition switch is switched to the “ON” position, and also for a period of 30 seconds after the
ignition switch is switched to the “OFF” position, the transistor of the electronic control unit is switched ON,
and battery voltage is supplied from the battery (through fusible link No. 9) to the power window relay.
In addition, voltage is supplied (through fusible link No. 9) to power window switch and motor as a result of
the switch-ON of the power window relay.
NOTETurn the ignition switch from ON to OFF, and power will be supplied to the power window relay for 30
seconds. However, power supply will be stopped if the door is opened during this period.
Electronic control unit terminal voltage (Disconnect the connector of the electronic control unit and
check the wiring harness side.)
ECU terminal No. Signal
ConditionTerminalvoltage
5*I
7*2Power window relay signalAt all timesSystem
voltageP
NOTE*I : Vehicles without theft-alarm system
“2: Vehicles with theft-alarm systemChecking the individual part
Power window relay: Refer to
P.42-51.
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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.

42-58BODY - 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 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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