1994 MITSUBISHI 3000GT ECU

Downloaded from www.Manualslib.com manuals search engine CHASSIS ELECTRICAL - Radio- and TaDe Plaver54-183
Card
Security code216N1034
Typical name card
A Cards
PROCEDURE FOR INPUTOFSECURITYCODE FOR RADIOAND TAPE PLAYER WITH ANTI-THEFT SYSTEM
The radio and tape player does not operate in the following
states.
(1) Power supply to the radio and tape player has been sus-
pended for more than one hour continuously by removing
the cable from the battery terminal or disconnecting the
harness connectors.
(2) The power supply to the radio and tape player has been
suspended for more than one hour owing to blown fuse
or discharged battery.(3) The radio and tape player has been replaced.
If the radio and tape player does not operate for these causes,
input the security code by the following procedure to operate
it.
1.Using any of the following methods, confirm the security
code.
(1)
Read the security code indicated on the cards retained
by the user.
(2) If the security code is unknown owing to the user’s
loss of the cards,a. Remove the audio panel and then pull out the
radio and tape player partially.
b.Read the serial No. shown on the name card of
the radio and tape player.
c.Look up the anti-theft code corresponding to the
serial number in the serial number-anti-theft code
table; or, make inquiries to Mitsubishi Motor Sales
of America, Inc.(3) When the radio and tape player is replaced
Read the security code on the cards attached to the
upper surface of the replacement radio and tape player.
NOTE
Deliver the cards (two) to the user.
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Downloaded from www.Manualslib.com manuals search engine 54-184CHASSIS ELECTRICAL - Radio and Tape Plaver
TYPE 1
POWER button Disp’ayPROG button
TYPE 2
DisplayPROG button
Memoryselect
button
POWER button
TYPE 3
PROG button
ZHllA004
Memory,1r select
POW’ER buttonIDisplayH’llAlM
section00002402
Typical security code “5283”
ZHllFOOl
2.Return power supply for the radio and player to the normal
state.3. Turn the ignition key to the “ACC” position.
4. Press the POWER button, and “code” will be displayed
on the display.
5.Press No.1 through No.4 memory select buttons and setthe
4-digit security code indicated on the card.
Every time each digit key is pressed, the number changes
as follows:
40 +l +2--e 9+0 **-
6.Press the PROG button. After a beep is heard, the radioand tape player will be in the operating state.
7. If the input security code does not agree with that in
memory, “1 Err” is displayed on the display. In a few se-conds, it will change to “code”. So, repeat steps 4 and
5.
NOTE
(1) The security code can be set three times at the most.
(2) The second error is displayed as “2 Err”. If the third
error is made, “3 Err” is displayed and then it changes
to “OFF”.
(3) When setting is attempted four or more times, keeping
the ignition key in the “ACC” or “ON” position for about
one hour will automatically erase the “OFF” display.
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Downloaded from www.Manualslib.com manuals search engine CHASSIS ELECTRICAL - Radio and Tape Player54-I 89
Antenna going downAntenna going up
16FO203
16F019800002406
REMOVAL SERVICE POINT
+A,REAR SEAT CUSHION REMOVAL
Raise and remove the seat cushion with the lever pulled.
INSTALLATION SERVICE POINT
.AqREAR SEAT CUSHION INSTALLATION
(1) Securely fit the attachment wire of the seat cushion
under the seatback.
(2) Pass the inner seat belt buckles through the cushion.
(3) Securely fit the lock plates of the seat cushion into
the holes in the floor.
INSPECTION
ANTENNA MOTOR INSPECTION
Disconnect the motor antenna control unit connector, connect
the positive terminal of the power supply to terminal (1) and
connect the negative terminal to terminal (4) to check that
the antenna goes up, and that when the connections are re-
versed, the antenna goes down.
MOTOR ANTENNA CONTROL UNIT INSPECTION
(1) Connect the harness connector to the motor antenna.
(Body harness)
(2) Disconnect the antenna motor connector.
(3) With the ignition switch in the ACC or ON position, operate
the radio switch and check the voltage between the termi-
nals during the period when the antenna is going up or
going down.
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Antenna operating
directionTerminals to checkVoltage (V)
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Down
UPl-310-13
3-410-13
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Downloaded from www.Manualslib.com manuals search engine CHASSIS ELECTRICAL - Rear Window Defogger54-195
5W-B2W-B
HORN5W-B,,l (c-68)J/B
(c-83)-10A
(F)R-B(F>R-E
DOOR LIGHT AND LUGGAGECOMPARTMENT
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FUSIBLE LINK@I
.HEADLIGHT.FOG LIGHT.TAILLIGHT
PARKING/SIDE
MARKER LIGHTAND LICENSEPLATE LIGHT
ETACS ECU
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NOTE:l:VEHICLES WITHOUTTHEFT-ALARM SYSTEM.X2:VEHICLES WITHTHEFT-ALARM SYSTEM.
(C-79)FRONT SIDE (c-83)(D-06)(D-41) (D-42)(D-44)
HR13MOlAB
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Downloaded from www.Manualslib.com manuals search engine 54-202CHASSIS ELECTRICAL - Rear Window Defogger
With voltmeterData link connector
When using the MUT-IICUD to 1993 models>
Y2OFO16400002231
Ground
INPUT SIGNAL

When using the scan tool
(MUT) or voltmeter
Using the scan tool or voltmeter, check whether or not the
input signals from each switch are being input to the ETACS
unit.
(1) Connect the scan tool to the data link connector located
at the right side of the junction block or connect the voltme-
ter between the ETACS terminal and the ground terminal.
(2) Check if the buzzer of the scan tool sounds or the needle
of the voltmeter moves when each switch is operated.
If the buzzer sounds or the needle moves, the input signalsare 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.

When using the scan tool (MUT-II)
(1) Connect the scan tool to the data link connector. When
connecting the scan tool to a vehicle up to 1993 models,
use the adapter harness supplied together.
Caution
Turn off the ignition switch beforehand whenever thescan tool is connected or disconnected.
(2) If the scan tool makes a peep sound when each switchis operated (turned ON/OFF), the input signal to ECU
is normally sent from the switch circuit system. 1994 models>
When using the voltmeter
(1)Connect a voltmeter to the ETACS terminal and the ground
terminal of the data link connector using the special tool.
(2) If the voltmeter pointer deflects once when each switchis operated (turned ON/OFF), the input signal to
.ECU
is normally sent from the switch circuit system.
U2OFO163
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Downloaded from www.Manualslib.com manuals search engine 54-222CHASSIS ELECTRICAL - Theft-alarm System
TROUBLESHOOTING QUICK-REFERENCE TABLE
For information concerning the locations of electrical components, refer to GENERAL-Theft-alarm System
Circuit.
1.ARMING / DISARMING RELATIONSHIP
Trouble symptomThe system is not armed (The
SECURITY light doesn’t illumi-
nate, and the alarm doesn’t func-
tion.)
(The central door locking system
functions normally.
If the central locking system doesnot function normally, refer to
GROUP 42.)
The arming procedures are fol-
lowed, but the SECURITY light
does not illuminate.(There is an alarm, however,
when an alarm test is conductedafter about 20 seconds have
passed.)
The alarm sounds in error when,
while the system is armed, a door
or the liftgate is unlocked by us-
ing the key.
ICause
Damaged or disconnected
wiring of ECU power sup-
ply circuit
Damaged or disconnected
wiring of door switch input
circuit
Damaged or disconnectedwiring of SECURITY light
activation circuit.Blown SECURITY light
bulb
Malfunction of the ECU.
Damaged or disconnected
wiring of a door key cylin-
der and the
liftgate unlock
switch input circuit.
Malfunction of a door key
cylinder and the liftgate un-
lock switch.
Malfunction of the ECU.
2.ACTIVATION / DEACTIVATION RELATIONSHIP
Trouble symptomCauseThere is no alarm when, as an
Damaged or disconnected
alarm test, a door is opened with-wiring of door switch (all
out using the key.doors) input circuit
(The arming and disarming arenormal, and the alarm is
acti-Malfunction of the door
vated when the liftgate or hood isswitch
opened.)
Malfunction of the ECUThere is no alarm when, as an
Damaged or disconnected
alarm test, the liftgate is opened
without using the key.wiring of liftgate switch in-
put circuit
(The alarm is activated, however,
by opening a door or the hood.)Malfunction of the liftgate
switch.
Malfunction of the ECU.Check methodCheck by using check
chart P.54-224.Check by using check
chart P.54-225.Check by using check
chart P.54-229.
If input checks
(P.54-220) indicate amalfunction, check by
using check chart
P&f-227.
Check method
If input checks
(P.54-220) indicate a
malfunction, check by
using check chart
P.54-225.
If input checks
(P.54-220) indicate a
malfunction, check by
using check chart
P.54-228.
Remedy
Replace the fusible link
No. (6) or the fuse No.
(19).Repair the harness.
Repair the harness or re-
place the door switch.
Replace the fusible linkNo. (6) or the fuse No.(1%
Repair the harness.
Replace the bulb.
Replace the ECU.
Repair the harness or re-
place a door key cylinderand the
liftgate unlock
switch.
Replace the ECU.
Remedy
Repairthe harness or re-
place the door switch.
Replace the ECU.
Repair the harness or re-
place the liftgate switch.
Replace the ECU.
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Downloaded from www.Manualslib.com manuals search engine CHASSIS ELECTRICAL - Theft-alarm System54-223
Trouble symptom
Cause
Check method
Remedy
There is no alarm when, as analarm test, the hood is openedDamaged or disconnected
wiring of hood switch input
If input checks
Repairthe harness or re-
from within the vehicle.circuit.
(P.54-220) indicate aplace the hood switch.
(The alarm is activated, however,malfunction, check by
I
by opening a door or the liftgate.)using check chartMalfunction of the hood p.54-225.
switch.
Malfunction of the ECU.
-Replace the ECU.
Engine would not start [EngineThere is a short-circuit of
starting is possible when the the starter relay activationCheck by using check
chart P.54-234.
Repair the harness.
starter relay is in the switched-off
circuit
(normally closed) condition, with
the clutch switch in the switch-off
and the ECU harness connector
disconnected.]
When, as a test of the alarm, aDamaged or disconnectedCheck by using check
door or the
liftgate is opened wiring of headlight power chart P.54-231, 232.
Repairthe harness or re-
without using the key, orthe hood
is opened from within the vehicle,supply circuit or headlightplace the diode Ds.
activation circuitReplace the headlight
the horn and the theft-alarm hornrelay or the headlight.sound but the headlights don’t
flash. (The headlights can, how-
ever, be switched. ON by usingMa
lfunction of the ECUReplace the ECU.
the passing switch.)The headlights flash during an
alarm test but the horn orthe theftDamaged or disconnectedCheck by using checkRepair the harness.
alarm horn does not sound.wiring of horn relay power
chart P.54-229,230,231.supply circuit or horn ac-Replace the horn.
tivation circuitReplace dedicated fuse
Damaged or disconnectedNo. (6) or the fusible linkwiring of the theft-alarmNo. (6).horn relay power supply
circuit or the theft-alarm
horn activation circuit.
Malfunction of the ECU.
Replace the ECU.The system is not deactivated
nhen, during an alarm test in
Damaged or disconnected
If input checks
which the alarm is intentionallywiring of door key cylinder
Repair the harness.activated, the door or
liftgate isand
liftgate unlock switch(P.54-220) indicate a
input circuitmalfunction, check byReplace the key cylinder
Jnlocked by using the key.
using check chartswitch or the
liftgate
switch.
:The system also cannot be dis-P.54-227,228.
armed.)
Malfunction of door keycyl-inder and liftgate unlock
switch.
Malfunction of the ECU
Replace the ECU.
ECU: Electronic Control Unit
NOTEIf the
lifigate unlock switch or door key cylinder unlock switch is operated roughly, or if these switches have
been installed incorrectly or switches themselves are defective the ECU may not accept the warning or alarmcancelling signal. In such case, the alarm operation will take place when the door is opened using a key.
[When the door key cylinder switch has been shorted, however, if the ignition switch is turned ON, the ECU
judges the detection-switch as faulty and thereafter, it will prevent setting of (warning) alarm until the shorting
is corrected.]
If the
liftgate is opened using a key and is left opened when the door key cylinder switch system has a trouble
(wiring harness damage, open circuit, etc.), the ECU judges it as the
liftgate holding mode and does not producealarm even when the door is opened.
TSB Revision

Downloaded from www.Manualslib.com manuals search engine CHASSIS ELECTRICAL - Theft-alarm Svstem
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CHECKING THE CIRCUIT AND INDIVIDUAL PART1. ETACS POWER-SUPPLY AND GROUND CIRCUITS
Description of operationThe battery supplies a stabilized 5 V power supply to the
ECU, via the constant-voltage circuit and terminal 51 (which
is directly connected to the battery).
ECU terminal voltage (Connection condition of the ECU con-
nector).
I
ECU
SignalConditionTerminal
terminal No.
voltage
51ECU power supplyAt all times12v
2. KEY-REMINDER SWITCH INPUT CIRCUIT
Description of operationThe key-reminder switch is switched OFF and HIGH-level
signals are sent to the ECU when the key is inserted into
the ignition key cylinder: when the key is removed, the key-re-
minder switch is switched ON and LOW-level signals are sentto the ECU.
ECU terminal voltage (Connection condition of the ECU con-
nector).
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ECUTerminal
terminal No.SignalConditionvoltage
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64Key-reminder
switch
Key removed12 V
Key inserted0 V
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