1996 MITSUBISHI 3000GT ESC

Downloaded from www.Manualslib.com manuals search engine 54-168CHASSIS ELECTRICAL - Radio and Tape Player
IA-9Ever-present noise.I
Noise is often created by the following factors, and
often the radio is OK when it is checked individually.l Traveling conditions of the vehicle
l Terrain of area traveled through
l Surrounding buildings
l Signal conditions
l Time periodFor this reason, if there are still problems with noiseeven after the measures described in steps A-l
to A-8 have been taken, get information on the fac-
tors listed above as well as determining whetherthe problem occurs with AM or FM, the station
names, frequencies, etc., and contact a service cen-
ter.B. RADIO
IB-lNo power is supplied when the switch is set to ON.IIIIs multi-purpose fuse No. 4 blown or is the circuit open?Replace fuse or repair harness.
NoIs the connector at the back of the radio connected properly?
Yes
Connect connector securely.1t
NoDisconnect and check the connector at the rear of the radio. Is the ACC / Repair harness.
power (12 V) being supplied to the radio?J
I
Yes
1 Reoair or reolace radio.
1 B-2No sound from one speaker.ICheck to see if there is any sound when attached
to another radio.
I-=----[Repair or replace radio unit.
No
checkthespeakerharnessfor conductance.
out.*Speakarj
NoRepair speaker harness and ensure
proper connection of relay connectors.
tRepair or replace speaker.
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Downloaded from www.Manualslib.com manuals search engine 54-176CHASSIS ELECTRICAL - Radio and Tape Player
C-6Uneven revolution. Tape speed is fast or slow.
NoYesAre there any foreign objects inside the cassette player?
Remove foreign object(s).
No
Is the head or capstan roller dirty?
I-
Z16AO668
No
j Reoair or replace cassette olaver.
Yes
C-7Automatic search does not work.IDoes the MSS (automatic search) button” depress properly?
YesButton improperly operated.
1Yesc Tape used is bad.
Nol l
lWhen the time between songs on a tape is less than three seconds,or when there is a three second period in the middle of a song in
which the volume level is extremely low, the automatic search function
*2may not work properly.
lEnsure that the tape label is not loose, that the tape itself is not deformedand that the tape is tightly wound. Also, tapes of C-120 or greater
length often get caught in the mechanism and should not be used.
t1 Repair or replace the cassette player.
1 TSB Revision

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 CHASSIS ELECTRICAL - Rear Window Defogger54-203
L
L-J
c
Normal characteristic curve
Voltage
j\
PositivePrinted heater lineterminalNegativeterminal
Abnormal characteristic curve
Voltage
Qj (( r”!“Yui;
Positive
terminalPrinted heater line Negativeterminal
216Y332
BreakTape
\
Conductive
paint
216Y333
16FO16700002409ON-VEHICLE SERVICE
THE PRINTED-HEATER LINES CHECK
(1) Run engine at 2,000 rpm. Check heater element with bat-tery at full.
(2) Turn ON rear window defogger switch. Measure heater
element voltage with circuit tester at rear window glass
center A.
Condition good if indicating about 6 V.
(3) If 12 V is indicated at A, there is a break in the negative
terminals from A.
Move test bar slowly to negative terminal to detect where
voltage changes suddenly (0 V).(4) If 0 V is indicated at A, there is a break in the positive
terminals from A. Detect where the voltage changes sud-
denly (12 V) with the same method described.
THE PRINTED-HEATER LINES REPAIR
REQUIRED MATERIALSl Thinner
l Tapel Lead-free gasoline
l Fine brush
l Conductive paint
(1) Clean disconnected area with lead-free gasoline. Tape
along both sides of heater element.
(2) Mix conductive paint thoroughly. Thin the required amount
of paint in a separate container with a small amount of
thinner and paint break three times at 15 minute intervals.(3) Remove tape and leave for a while before use (circuit
complete).
(4) When completely dry (after 24 hours) finish exterior with
a knife.
Caution
Clean glass with a soft cloth (dry or damp) along defog-
ger heater element.REAR WINDOW DEFOGGER SWITCH
(1)Remove rear window defogger switch from the meter bezel.(Refer to
P.54-109.)
(2) Operate the switch and check the continuity between the
terminals.
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Downloaded from www.Manualslib.com manuals search engine 54-220CHASSIS ELECTRICAL - Theft-alarm Svstem
With voltmeterData link connector
\‘%S$F- Data link t Ground ETACS z16R1338
When using the MUT-II4Jp to 1993 models>
Y2OFO16400002231TROUBLESHOOTING GUIDE
CHECKING THE INPUT
When using the scan tool
(MUT) or voltmeter
1. Connect a voltmeter between terminal for ETACS and
terminal for ground, or connect the scan tool to the data
link connector.
‘d

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.vi
UZOFOlfX3

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.
1 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).
I
ECUTerminal
terminal No.SignalConditionvoltage
\
L)
L)
64Key-reminder
switch
Key removed12 V
Key inserted0 V
d
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Downloaded from www.Manualslib.com manuals search engine -
LCHASSIS ELECTRICAL
- Theft-alarm System54-225NOTE
rl:UP to 1993 moaelsf2:From 1994 modet.sKX55-AK-R540¶-N3. HOOD SWITCH INPUT CIRCUIT
Description of operation
When the hood is closed (the hood switch is switched OFF),
HIGH-level signals are sent to the ECU:
When the hood is opened (the hood switch is switched ON),
LOW-level signals are sent to the ECU.
ECU terminal voltage (Connection condition of the. ECU con-
nector).
ECU
terminal
No.
18
Signal
conditionTerminal
voltage
Hood switch HoodOpen OV
Closed 5
V*
*Measurement is not possible by using a voltmeter, but is possible
by using an oscilloscope.4. DOOR SWITCH INPUT CIRCUIT
Description of operation
When the door is closed (the door switch is switched OFF),
HIGH-level signals are sent to the ECU:
When the door is opened (the door switch is switched ON),
LOW-level signals are sent to the ECU.
ECU terminal voltage (Connection condition of the ECU).
ECU
terminal
No.Signal
ConditionTerminal
voltage
10Driver door Driver
switchdoorOpen OV
Closed 5 V*
Passenger
Passen-Open 0 V
door switchger door Closed5 v*I,I
II*Measurement is not possible by using a voltmeter, but is possible
by using an oscilloscope.
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Downloaded from www.Manualslib.com manuals search engine 54-226CHASSIS ELECTRICAL - Theft-alarm System
5. DOOR LOCK ACTUATOR SWITCH INPUT CIRCUIT
Description of operation
When a door is locked by the lock knob or the key, the door
lock actuator switch is switched OFF, and HIGH-level signals
are sent to the ECU. These signals activate the timer circuit
of the R ECU, thereby causing the activation circuit to function,thus
R activating the door lock actuator of all doors.
ECU terminal voltage (Connection condition of the ECU con-
nector).
ECU
terminal
No.
13
14
!
I
t
((
Signal
Door lock ac-
tuator switch
(driver door)
loor lock ac-
uator
switch
:passenger
joor)ConditionTerminal
voltage
Door
Lock:5 V’lock ac- OFF
tuator
switchUnlock: ON 0 V
DoorLock:‘5 v*lock ac- OFF
tuator
switchUnlock: ON 0 V
*Measurement is not possible by using a voltmeter, but is possible
by using an oscilloscope.
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