ESC MITSUBISHI 3000GT 1996 2.G Workshop Manual

Downloaded from www.Manualslib.com manuals search engine iGENERAL
- How to Diagnose31
Normal close (NC) type
Deenergized stateEnergized state
Current does not flow
Z1680235
State of fuse blown due to overcurrent
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L
I21680237
State of fuse blown due to thermal fatigue
Z1660236When a normal close type relay as illustrated here is
checked, there should be continuity between terminals
(1) and (2) and between terminals 3 and 4 when the relay
is deenergized, and the continuity should be lost betweenterminals 3 and 4 when the battery voltage is applied
to the terminals
1 and 2. A relay can be checked in this
manner and it cannot be determined if a relay is okay
or faulty by checking its state only when it is deenergized
(or energized),
CHECKING FUSESA blade type fuse has test taps provided to allow checking
of the fuse itself without removing it from the fuse block. Thefuse is okay if the test light comes on when its one lead is
connected to the test taps (one at a time) and the other lead
is grounded. (Change the ignition switch position adequatelyso that the fuse circuit becomes live.)
CAUTIONS IN EVENT OF BLOWN FUSE
When a fuse is blown, there are two probable causes as follows:One is that it is blown due to flow of current exceeding its
rating.The other is that it is blown due to repeated on/off current
flowing through it. Which of the two causes is responsible
can be easily determined by visual check as described below.(1) Fuse blown due to current exceeding rating
The illustration shows the state of a fuse blown due to
this cause. In this case, do not replace the fuse with a
new one hastily since a current heavy enough to blow
the fuse has flowed through it. First, check the circuit
for shorting and check for abnormal electric parts. Only
after the correction of such shorting or parts, fuse of the
same capacity should be used as a replacement. Never
use a fuse of larger capacity than the one that has blown.
If such a fuse is used, electric parts or wirings could be
damaged before the fuse blows in the event an overcurrent
occurs again.(2) Fuse blown due to repeated current on/off
The illustration shows the state of a fuse blown due to
repeated current on/off. Normally, this type of problem
occurs after fairly long period of use and hence is less
frequent than the above type. In this case, you may simplyreplace with a new fuse of the same capacity.
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Downloaded from www.Manualslib.com manuals search engine 32GENERAL - How to Diaanose
CHECKING CABLES AND WIRES1. Check connections for looseness, rust and stains.
2.Check terminals and wires for corrosion by battery electro-
lyte, etc.
3.Check terminals and wires for open circuit or impending
open circuit.4. Check wire insulation and coating for damage, cracks
and degrading.
5.Check conductive parts of terminals for contact with other
metallic parts (vehicle body and other parts).6. Check grounding parts to verify that there is complete
continuity between attaching bolt(s) and vehicle body.7. Check for incorrect wiring.
8.Check that wirings are so clamped as to prevent contact
with sharp corners of the vehicle body, etc. or hot parts(exhaust manifold, pipe, etc.).
9.Check that wirings are clamped firmly to secure enough
clearance from the fan pulley, fan belt and other rotating
or moving parts.
10. Check that the wirings between the fixed parts such as
the vehicle body and the vibrating parts such as the engine
are made with adequate allowance for vibrations.
HANDLING ON-VEHICLE BATTERY
When checking or servicing does not require power from the
on-vehicle battery, be sure to disconnect the cable from thebattery
(-) terminal. This is to prevent problems that could
be caused by a short circuit. Disconnect the (-) terminal first
and reconnect it last.
Caution1. Before connecting or disconnecting the negative
cable, be sure to turn off the ignition switch and the
lighting switch.
(If this is not done, there is the possibility of semicon-
ductor parts being damaged.)
2.After completion of the work steps [when the battery’s
negative (-)
terminal is connected], warm up the engineand allow it to idle for approximately five minutes
under the conditions described below, in order to sta-
bilize the engine control conditions, and then checkto be sure that the idling is satisfactory.
Engine coolant temperature:
85-95°C (185-203°F)
Lights, electric fans, accessories: OFF
Transaxle: neutral position
(A/T models: “N” or “P”)
Steering wheel: neutral (center) position
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Downloaded from www.Manualslib.com manuals search engine 54-4CHASSIS ELECTRICAL - Battery
4. Clean top of battery with same solutions as described
in step (3).
5.Inspect battery case and cover for cracks. If cracks are
present, battery must be replaced.
6.Clean the battery post with a suitable battery post cleaning
tool.7. Clean the inside surfaces of the terminal clamps with a
suitable battery terminal cleaning tool. Replace damaged
or frayed cables and broken terminals clamps.8. Install the battery in vehicle.
9.Connect (+) and (-) cables to battery in the order of men-
tion.
10. Tighten the clamp nut securely.BATTERY
CHARGLNG
Caution
When batteries are being charged, an explosive gas forms
beneath the cover of each cell. Do not smoke near batteries
on charge or which have recently been charged. Do notbreak live circuits at the terminals of the batteries on
charge. A spark will occur where the live circuit is broken.
Keep all open flames away from the battery.
Battery electrolyte temperature may temporarily be allowed
to rise to 55°C (131°F). Increase of electrolyte temperature
above 55°C (131 OF) is harmful to the battery, causing deforma-tion of battery cell, decrease in life of battery, etc.
CHARGE RATE
If the test indicator is white, the battery should be charged
as outlined below.
When the dot appears or when maximum charge shown below
is reached, charging should be stopped.
NOTE
When the charging is performed at 5 amps, charging is virtually
100% three hours after the indicator’s indication changes from
white to green.
Use fast charging only in an emergency.
If the indicator does not turn to green even after the battery
is charged, the battery should be replaced; do not overcharge.
Charge Rate Chart
Batten/Slow Charging
Fast ChargingI
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Downloaded from www.Manualslib.com manuals search engine With voltmeterData link connector
’‘:’ ’ ’- Data linkGround ETA,CS 21~33300002230
54-80CHASSIS ELECTRICAL - Lighting System
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 needleof 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 MUT-II
cup to 1993 models>
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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 operation (turned ON/OFF), the input signal to ECU
is normally sent from the switch circuit system.
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.
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Downloaded from www.Manualslib.com manuals search engine 54-108
CHASSIS ELECTRICAL - Lighting System
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RELAY
INSPECTIONHEADLIGHT RELAY
/ TAILLIGHT RELAY / FOG LIGHT
RELAY CHECK
Connect battery to terminal 1 and check continuity between
terminals with terminal 3 grounded.
Power is supplied4-5 terminals
Continuity
Power is not supplied4-5 terminalsNo continuity
1-3 terminals
Continuity
POP-UP MOTOR RELAY (Up to 1993 models) CHECK
Check for continuity between terminals under the conditions
described below.
LIGHT AUTOMATIC SHUT-OFF UNIT CHECK
(1) Remove the quarter trim. (Refer to GROUP 52A - Trim.)
(2) Keeping the connector connected to the light automatic
shut-OFF unit, connect the test light (12 V-3.4 W) from
the harness side to terminal No. 6 (for tail lights) or No.
7 (for headlights). Under the following conditions, checkthe operation of the test light.
id
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Downloaded from www.Manualslib.com manuals search engine 54-156
CHASSIS ELECTRICAL - Radio and Tape Player
RADIO AND TAPE PLAYER WITH ANTI-THEFT SYSTEM
lWhen power supply is reconnected after set has been removed from vehicle (after BATT line of sethas been disconnected for more than one hour), what can be effectively performed is only supply
of power made by POWER button operation. (If power supply is connected within an hour, operating
state before disconnection of power supply is resumed.)
IGN key of vehicle is in ACC position and set is in no displaystate.
No displayAbnormal segment op-
*[Faulty
tIs it possible to set identifiNom-Faulty
Yes
Is a beep heard and then does radio operate when PROG button
is placed to ON position after setting four-digit identification numberIs a beep heard and “1 Err” displayed for two seconds before
No
displaying “code”?cFaulty set
No
tCheck if identification number on card is input and set correctly.
Is a beep heard and then does radio operate when PROG button
is placed to ON position after setting four-digit identification numberon card aaain?
Yes-----+ NomxJ (Error made in input during first setting)
I
NoIs a beep heard and “2 Err” displayed for two seconds before
displaying “code”?Faulty set
YesPress POWER button to erase “code” (to change to no display
state).
I
YesContinued to next page.
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Downloaded from www.Manualslib.com manuals search engine 54-I 62CHASSIS ELECTRICAL - Radio and Tape Player
A-4
Broadcasts can be heard but both AM and FM have a lot of noise.
(1)Noise occurs when the engine is stopped.
YesJ
(2)Noise occurs when the engine in running.
Do the following measures eliminate the noise?
@ Tune to a station with a strong signal.
l Extend the antenna completely. (Whip antenna)
l Adjust the sound quality to suppress high tones.
NoIs the radio body ground mounted securely?
Yes
Securely tighten the nuts for the bodyground.
Yes
YesClean the antenna plug and ground
wire mounting area. Mount the anten-
na securely. On a vehicle with a motor
antenna, check the antenna itself. (Re-fer to E-1, 2.)
If there is more noise than other radios, consult a servicecenter
NOTE
About noise encountered during FM reception only.
Due to differences in FM and AM systems, FM is
noise interference (first fading and multipath). (Refer
to A-2.)
not as susceptible as AM to interference from en-
gines, power lines, lightning, etc. On the other hand,
problem with the radio.>waves of noise or distortion generated by typical
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Downloaded from www.Manualslib.com manuals search engine CHASSIS ELECTRICAL - Radio and Tape Player54-167
A-8Noise sometimes appears on FM during traveling.
NoIs the antenna completely extended?
Yes
t Check the antenna itself.
(Refer to E-l, 2.)
+Does the problem clear up whenre
1 No
Yes
iDoes the problem appear only in certain locations and only with yes
certain stations?
No
~ Due to electrical field conditions. (Multipath
noise*, fading noise*).
Are connectors property connected?
Yes
Check connector connections.1
tDoes noise appear when the radio switch is turned on while the
vehicle is stopped
and the radio is struck while tuned away froma station?
Yes
No*Static electricity noise:Sody static electric from the shock absorberrubber bushings used to prevent vibration, tires,etc. occurs because of separation from the
ground, causing a buzzing noise.
Since no measures can be taken on the radioside, steps should be taken to discharge the
static
electricitv of the vehicle bodv.
Is the radio body correctly grounded?
No(Is the mounting screw tightened securely?
)
Yes
-) Tighten the screw securely.I
Is the antenna correctly grounded? (If noise appears when the antennais moved, this means the ground is not securely connected.)
Yes
If rust is present on the antenna ground screw,clean and tighten the ground securely.
*
1 Repair or replace radio.1
About multipath noise and fading noise
Because the frequency of FM waves is extreme-
ly high, it is highly susceptible to effects from
geological formations and buildings. These ef-
fects disrupt the broadcast signal and obstruct
‘reception in several ways.l Multipath noise
This describes the echo that occurs when the
broadcast signal is reflected by a large obstruc-
tion and enters the receiver with a slight time
delay relative to the direct signal (repetitious
buzzing).l Fading noise
This is a buzzing noise that occurs when the
broadcast beam is disrupted by obstructing ob-
jects and the signal strength fluctuates intricately
within a narrow range.
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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.
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