1993 MITSUBISHI 3000GT check engine

Downloaded from www.Manualslib.com manuals search engine 54-28CHASSIS ELECTRICAL - Meters and Gauges
16FO11500002300
16Fo255 00002383
FUEL GAUGE UNIT CHECKTo check, remove fuel gauge unit from fuel tank. (Refer to
GROUP 13F
- Fuel Tank.)
Fuel Gauge Unit Resistance
(1)Check that resistance value between the fuel gauge termi-
nal and ground terminal is at standard value when fuel
gauge unit float is at point F (highest) and point E (lowest).
Standard value:Point F: 3
If: 2 GPoint E: 110
It 7 Q
(2) Check that resistance value changes smoothly when float
moves slowly between point F (highest) and point E (low-
est).Fuel Gauge Unit Float Height
Move float and measure the height at point F (highest) and
point E (lowest) with float arm touching stopper.
Standard value:Point F: 18.6-21.6 mm (.73-.85 in.)
Point E: 193.4-196.4 mm (7.61-7.73 in.)
FUEL SENSOR CHECKConnect fuel gauge unit to battery via test light (12 V-3.4
W). Immerse in water. Condition good if light goes off whenunit thermistor is in water and lights when unit is removed
from water.
CautionwAfter completing this test, wipe the unit dry and install
it in the fuel tank.
TSB Revision

Downloaded from www.Manualslib.com manuals search engine CHASSIS ELECTRICAL - Meters and Gauaes
i
ENGINE COOLANT TEMPERATURE GAUGE SIMPLE CHECKConnect the harness connector via a
test light to the ground.
Remove the water temperature gauge
unit coupling connector.
t
Place the ignition switch in the ON posi-tion.
I
(12 v’3.4 w) \ //Z16FO13lCheck the test light and gauge conditions.
i(1) Test light lights. (Pointer of gauge does not swing.)_____c Replace water temperature gauge.
[ (2) Test light lights. (Pointer of gauge swings.)Replace water temperature gauge unit.
[ (3) Test light does not light. (Pointer of gauge does not swing.)/-------I Correct harness.
ENGINE COOLANT TEMPERATURE GAUGE UNIT CHECK
To check, remove engine coolant temperature gauge unit from
the thermostat housing.
Engine Coolant Temperature Gauge Unit Resistance
(1)Immerse unit in 70°C (158OF) water to measure resistance.Standard value: 104
f 13.5 Sz(2) After checking, apply the specified sealant around the
thread of engine coolant temperature gauge unit and install
on the thermostat housing.
Specified sealant:3M Nut Locking Part No. 4171 or equivalent
TSB RevisionI

Downloaded from www.Manualslib.com manuals search engine 54-30CHASSIS ELECTRICAL - Meters and Gauges
OIL PRESSURE GAUGE SIMPLE CHECKRemove the oil pressure gauge unit
coupling connector.Connect the harness connector via a
test light to the ground.
-1Place the ignition switch in the ON posi-Check the test light and gauge conditions.
(1) Test light lights. (Pointer of gauge does not swing.)
k-1 Replace oil pressure gauge.
1 (2) Test light lights. (Pointer of gauge swings.)k-1 Replace oil pressure gauge unit.
1 (2) Test light does not light. (Pointer of gauge does not swing.)/-1 Correct harness.
VOLTAGE GAUGE SIMPLE CHECKCheck voltage gauge for conditions.
(1) Voltage indicated by voltmeter differs from voltage indicated by
voltage gauge (position indicated by pointer).
-1 Replace gauge.
(2) Gauge does not operate.
/--I Correct harness or replace gauge.
1 TSB Revision

Downloaded from www.Manualslib.com manuals search engine 54-32CHASSIS ELECTRICAL - Meters and Gauges
DISASSEMBLY AND REASSEMBLY
Disassembly steps
1. Trip counter reset knob
2. Meter glass
3. Window plate
4. Speedometer
Ground
Reed switch
16R027300002385
3
5. Fuel gauge6. Tachometer7. Printed-circuit board8. Meter case
INSPECTION
REED SWITCH CHECK

Use circuit tester to check circuit repeats off/on between termi-\
nals when speedometer shaft turned several times.d
VEHICLES SPEED SENSOR CHECK

(1)Remove the vehicles speed sensor and connect as shownin the illustration, using a
3-10 k&2 resistance.
(2) Use a voltmeter to check for voltage at terminals (2) and
(3) when the pulse generator shaft is turning. (One revolu-
tion is four pulses.)
FUEL GAUGE CHECK
Measure resistance between terminals with circuit tester.
Standard value:
;I;Approx. 254 0Approx. 101
I2B-C
Approx. 153
fi
1 TSB Revision1

Downloaded from www.Manualslib.com manuals search engine 54-34CHASSIS ELECTRICAL - Meters and Gauges216FO14C
216FO14:216FO141INSPECTION
PRESSURE GAUGE CHECK
Measure resistance between terminals with circuit tester.Standard value: Approx. 72
&2
VOLTAGE GAUGE CHECK Refer to
P.54-30
OIL PRESSURE GAUGE CHECK
Measure resistance between terminals with circuit tester.Standard value: Approx. 42
Q
ENGINE COOLANT TEMPERATURE GAUGE CHECK(1) Remove the
IG terminal scre\;/ from area A.
(2) Measure resistance between terminals with circuit tester.
Caution
For inspection, use a circuit tester which uses a mea-surement current of 4
mA or less.
Standard value:A-B
Approx. 51
SzA-C
Approx. 139
QB-C
Approx. 190
R
1 TSB Revision

Downloaded from www.Manualslib.com manuals search engine 54-36CHASSIS ELECTRICAL - Lighting System
SPECIAL TOOLS
ToolTool number and name
1 ROM Pack
MB991 529Diagnostic trouble code
check harness
Supersession
MB991 341 C
Application
Up to 1993 models
Checking the lighting system
MB991 502All models
Checking the lighting system
MB991 529From 1994 modelsChecking the lighting system
using a voltmeter
I
‘, I
L/i
1
d
TSB Revision

Downloaded from www.Manualslib.com manuals search engine CHASSIS ELECTRICAL - Liahting System
TROUBLESHOOTING
Check the light aut
Refer to
P.54-108.
headlights is normal.
Taillights are not automati-
Check the driver’ssidedoor switch.tally
shut off either.
NOTE(1) *Up to 1993 models
(2) For information concerning the theft-alarm system, refer to
P.54-222.
TSB Revision

Downloaded from www.Manualslib.com manuals search engine INPUT SIGNALWith voltmeterData link connector
Ii ri7-11
When using the scan tool (MUT) or voltmeter‘d
Using the scan tool or voltmeter, check whether or not the
input signals from each switch are being input to the ETACS
unit.
54-56CHASSIS ELECTRICAL - Lighting System
(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 MUT-II
CUP to 1993 models>
Y2OFO16400002231,
0,@y.m$
( 1 1 1 2 1; 1 4% 16 1 7 1 8 / 1
’ 1-d \ \ 1
~~~4i10illi12i13illi15i16v~~~1 \ \ 1U2OFO163

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.‘dCaution
Turn off the ignition switch beforehand whenever the
scan 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.
I
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.
do
TSB Revision