1993 MITSUBISHI 3000GT check engine light

Downloaded from www.Manualslib.com manuals search engine CIRCUIT DIAGRAMS - MFI Circuit 125
IGNITIONSWITCH(IG1)
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WARNING WARNING
LIGHT LIGHT
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59 (D-04)
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HR05M03AB
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Downloaded from www.Manualslib.com manuals search engine CIRCUIT DIAGRAMS - MFI Circuit 133 ~
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HR05M04AB
1 TSB Revision

Downloaded from www.Manualslib.com manuals search engine CIRCUIT DIAGRAMS - Buzzer Circuit211
OPERATION
L
lBattery positive voltage is continuously applied to the key-reminder switch.l
If the driver’s door is opened (door switch ON) with the key inserted in the ignition switch (key-reminderswitch ON), the buzzer sounds to warn that the key has been left in the switch.
&eat belt warning>
lWhen the ignition switch is turned on, the timer circuit and pulse circuit will flicker the seat belt warning
light for approx. 6 seconds with the buzzer intermittently sounding.
lIf the seat belt is fastened for the while, the seat belt switch will be turned off and the buzzer will
stop.
TROUBLESHOOTING HINTS
/
L
ProblemCheck methodThe key-reminder The seat belt warning function l
Check the door switch.
warningdoesn’t is OK.(Refer to GROUP 42-Door Assembly.)
sound.The seat belt warning also l Check the buzzer.
doesn’t function.(Refer to GROUP 52A-Seat Belt.)
The seat belt warn-The seat belt warning light lCheck the seat belt switch.
ing doesn’t
func- flashes.(Refer to GROUP 52A-Seat Belt.)
tion.The seat belt warning light l Check the key-reminder switch.
also does not function (and(Refer to GROUP M-Ignition Switch.)
the key-reminder warning
also does not function).
The buzzer doesn’t stop even through the driver’slCheck the seat belt switch.
seat belt has been buckled.(Refer to GROUP 52A-Seat Belt.)
The seat belt warning light doesn’t flashes (but thelCheck the light bulb.
buzzer sounds).lCheck the key-reminder switch.(Refer to GROUP 54-Ignition Switch.)
lCheck the seat belt switch.
(Refer to GROUP
52A-Seat Belt.)
The warning light does not flash and the warninglCheck the ignition switch input signal.buzzer also does not sound.(Refer to GROUP 52A-Troubleshooting.)l Check the key-reminder switch.
(Refer to GROUP 54-Ignition Switch.)
lCheck the seat belt switch.
(Refer to GROUP 52A-Seat Belt.)
The warning light flashes, but the warning buzzer l
Check the key-reminder switch.
does not sound.(Refer to GROUP M-Ignition Switch.)lCheck the seat belt switch.
(Refer to GROUP 52A-Seat Belt.)
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Downloaded from www.Manualslib.com manuals search engine CIRCUIT DIAGRAMS - Central Door Locking Circuit237
OPERATION/
Li!l
When the door lock switch is set to the LOCKside (or UNLOCK side), the LOCK side (or
UNLOCK side) of the door lock relay is turned
ON and the door actuators of all doors operate.l
If 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

0
,’
id
0
With the driver’s and front passenger’s doorsunlocked, press the LOCK switch of the
transmitter, and the door lock signal output (0V) will be sent from the
keyless entry control
unit terminal No. 12 closing the door lock powerrelays 1 and 2 to lock the driver’s and front
passenger’s doors.
While the R.H. and L.H. doors are in the lockedstate, press the UNLOCK switch of the
transmitter once, and the DOOR UNLOCK
switch signal (0 V) will be sent from the keylessentry control unit terminal No. 14 closing the
door lock power relay 2 to unlock the driver’s
door.
Under the above-mentioned conditions, further
press the UNLOCK switch of the transmitter,and the DOOR UNLOCK signal output (0 V)
will be sent from the keyless entry control unitterminal No. 13 closing the door lock power
relay 1 to lock the front passenger’s door.
When the keyless entry system is operated toturn the driver’s door lock switch from the
UNLOCK position to the LOCK position, thelock 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.dome light/foot light blinking signal output
(system voltage) will be sent twice from the
keyless entry control unit terminal No. 11 when
the door lock switch is turned from the LOCK
position to the UNLOCK position, the lighting
signal output (0 V) will be provided for approx.
3 seconds.
NOTE
The dome light winks or comes on when the domelight switch is in the DOOR interlock position.
However, the dome light does not wink while it .is
ON for 6 seconds after closing the door by ETACS
function.Besides the above-mentioned operations, the
keyless entry control unit has the following functions.l
If any door is not opened or closed within 30
seconds from unlocking the door by means ofthe
keyless entry system, the door is
automatically locked.In addition, if the
cryptographic code other than the code storedin the receiver memory is received 30 times
in one minute continuously, operation of the
unit is suspended for 10 minutes.l
Operation is also suspended if the ignition key
remains inserted (key reminder switch: OFF)
and either door is left open (door switch: ON).TROUBLESHOOTING HINTS

Phenomenon
Inspection method
One of the door lock actuators fails to operate.
0Check the door actuator which fails to operate.
No unlock operation can be made by pressing door lock0
knob after fulfilment of following conditions.Check the key reminder switch input signal.0Check the key reminder switch. (Refer to GROUP
0Insertion of key in ignition switch (key reminder switch54-Ignition Switch.)
OFF)0
0Opening of door (door switch ON)Check the front door switch input signal.0 Check the front door switch. (Refer to GROUP
42-Door Assembly)
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Downloaded from www.Manualslib.com manuals search engine 238CIRCUIT .DIAGRAMS - Central Door Locking Circuit
l
The indicator does not blink after pressing thetransmission switch of the transmitter.
1) Check or replace the battery. (Refer to
GROUP
42-Keyless Entry System.)
2) Replace the transmitter.
l Transmitted wave is being sent from thel
R.H. and L.H. doors can be locked and unlocked
by the transmitter but the dome light and footlight do not blink or come on. (Interlocked
lighting of the dome light and foot light by means
of the dome light switch or door opening and
closing is normal).
transmitter (indicator is blinking), but the system
does not operate.1) Check the cryptographic code registering
method. (Refer to GROUP
42-Keyless
Entry System.)
2)Check the keyless entry control unit terminalvoltage. (Refer to GROUP
42-Trouble-
shooting.)3) Check the coaxial cable of antenna and
the ground wire for connection.
l Only R.H. or L.H. door can be locked or
unlocked.
1)Check the door lock power relay 1 (for front
passenger’s door) or door lock power relay2 (for driver’s door). (Refer to GROUP
42-Central Door Locking System.)
2)Check the keyless entry control unit terminalvoltage. (Refer to GROUP
42-Trouble-
shooting.)
1)Check the keyless entry control unit terminal
voltage (Refer to GROUP
42-Troubleshoot-
ing.)2) Check the harness.
NOTE
l :Perform this check when replacement of the
transmitter and/or
keyless entry control unit or
faulty storage of cryptographic code has been
made.
\
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‘d I
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Downloaded from www.Manualslib.com manuals search engine CIRCUIT DIAGRAMS - Remote Controlled Mirror Circuit321 ~
OPERATIONTROUBLESHOOTING HINTSI
Ll When teh remote controlled mirror switch isNeither right nor left mirror operates
operated while the ignition key is in “ACC” or
“ON” position, current flows through fuse No.1) Also cigarette lighter does not operateI
5 remote controlled mirror switch, remotel Check multi-prpose fuse No. 5.
controlled mirror, remote controlled mirror2) Cigarette lighter operates
switch, and ground, causing the mirror to move.l Check remote controlled mirror switch.
1 TSB RevisionI

Downloaded from www.Manualslib.com manuals search engine ENGINE ELECTRICAL - Charging System16-5
OPERATION
When engine is stoppedWhen the ignition switch is switched to the “ON”
position, electricity flows from the
‘I” terminal of
the generator to the field coil, and at the same time
the charging warning light illuminates.
When engine is being started/has started
When the engine is started, charging voltage is ap-
plied to the ‘I” terminal of the generator, with the
result that the charging warning light is extinguished.
In addition, because battery voltage is applied to
the “S” terminal of the generator, this battery voltage
is monitored at the
IC voltage regulator, thus switch-ing ON and OFF the current to the field coil and
thereby controlling the output voltage of the genera-
tor.
Power is supplied to each load from the “B” terminal
of the generator.
NOTE
The generator relay functions as a back-up for the
flow of electricity to the field coil if there is a discon-
nection or damaged wiring of the charging warning
light.
COMPONENT LOCATION
Name/ Symbol 1
1 Generator relayI A I
TROUBLESHOOTING HINTS1. Charging warning light does not go on when
the ignition switch is turned to “ON”, before the
engine starts.l Check the bulb.
2.Charging warning light fails to go off once the
engine starts.l
Check the IC voltage regulator (located with-
in the generator).
3. Discharged or overcharged battery.l
Check the IC voltage regulator (located with-
in the generator).4. The charging warning light illuminates dimly.
l Check the diode (within the combination
meter) for a short-circuit.
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Downloaded from www.Manualslib.com manuals search engine ENGINE ELECTRICAL - Charging System16-7/
L
(6) Connect a tachometer. (For the procedure for
connecting the tachometer, refer to GROUP
- On-vehicle Service.)(7)
kkconnect the negative battery cable.
(8) Leave the hood open.
(9) Start the engine.
(lO)With the engine running at 2500 rpm, turn the
headlights and other lights on and off to adjust
the generator load so that the value displayed
on the ammeter is slightly above 30A.Limit value: Max. 0.3 V
NOTE
When the generator output is high and the value
displayed on the ammeter does not decreaseto
30A, set the value to 40A. Read the value
displayed on the voltmeter at this time.
In this case the limit value becomes max. 0.4V.
Adjust the engine speed by gradually decreas-
ing it until the value displayed on the ammeterOUTPUT CURRENT TEST
is 30A. Take a reading of the value displayed
on the voltmeter at this time.
(11) If the value displayed on the voltmeter is above
the limit value, there is probably a malfunction
in the generator output wire, so check the wiring
between the generator
“IS” terminal and the bat-tery
(+) terminal (including fusible link).
If a terminal is not sufficiently tight or if the har-
ness has become discolored due to overheating,
repair and then test again.(12)After the test, run the engine at idle.
(13)Turn off all lights and turn the ignition switch
to the OFF position.
(14)Disconnect the negative battery cable.
(15)Disconnect the ammeter, voltmeter and tachom-
eter.
(16)Connect the generator output wire to the genera-
tor “B” terminal.
(17)Connect the negative battery cable.
Charging indicatorGenerator
30A
Voltmeter
BatteryAmmeter
t
-Load
6EN0893
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