1991 MITSUBISHI 3000GT door lock

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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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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SUPPLEMENTAL RESTRAINT SYSTEM (SRS) - General lnform=*ion52B-5
r1.c
L
E.
,
iiCAUTION: SRS diagnosis unit
This unit cannot be repaired.
If defective, remove and replace entire unit per
service manual instructions.
Do not disassemble or tamper.
See service manual for handling and storage
instructions.Driver’s air bag information
This vehicle
ha% an air bag which will supple-
ment the driver’s seatbelt in certain frontal
collisions. The air bag is not a substitute for the
driver’s seatbelt in any type of collision. The
driver, and all other occupants, should wear
seatbelts at all times.
WARNING!
If the “SRS” warning light does not come.on
for about 7 seconds when ignition key is turned
to “ON” or engine is started, or if it stays on
while driving, drive the vehicle to your nearest
authorized dealer right away. Also do so if
vehicle’s front end is damaged or if air bag has
deployed.
The air bag system must be inspected by an
authorized dealer ten years after vehicle manu-
facture date shown on certification label lo-
cated on left front door-latch post or door
frame.Read “SRS” section of your owner’s manual
before driving, for important information, about
Dperation, service and disposal of the air bag
svstem.
Do no drop: keep dry.
Failure to follow instructions could render air
bag inoperative and result in driver injury.
F. CAUTION: SRS
Before replacing steering wheel, read service
manual, center front wheels
ahd align SRS
clock spring neutral marks.
Failure to do so may render SRS system
inoperative, risking serious driver injury.
I.
J.WARNING: SRS
This air bag module cannot be repaired. Do not
disassemble or tamper.
Do not perform diagnosis. Do not touch with
electrical test equipment or probes. Refer to
service manual for further instructions, and for
special handling, storage and disposal proce-
dures.
Tampering or mishandling can result in injury.
Danger! Poison. Keep out of the reach of
children.
Contains sodium acid and potassium nitrate
contents are poisonous and extremely flamm-
able. Contact with acid, water, or heavy metals
may produce harmful and irritating gases or
explosive compounds. Do not dismantle, in-
cinerate or bring into contact with electricity or
store at temperatures exceeding
(93.3”C)
200°F.Fast aid: If contents are swallowed induce
vomiting. For eye contact flush eye with water
for 15 minutes. If gases from acid or water
contact are inhaled, seek fresh air. In every
case, get prompt medical attention.
For additional information, see material safety
data sheet (MSDS) for this product.
CAUTION: SRS clock spring
This is not a repairable part. Do not disassem-
ble or tamper.
If defective, remove and replace entire unit per
service manual instructions.
Before replacement, read service manual, cen-
ter front wheels and align neutral marks.
Failure to
foHow instructions may render SRS
system inoperative, risking serious driver in-
jury.CAUTION: SRS
Before removal of steering gearbox, read ser-
vice manual, center front wheels and remove
ignition key.
Failure to do so may damage SRS clock spring
and render SRS system inoperative, risking
serious driver injury.
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