Speedometer MITSUBISHI 3000GT 1992 2.G Workshop Manual

Downloaded from www.Manualslib.com manuals search engine ClRCUlT DIAGRAMS - MFI Circuit 149
IGNSWI’
2B-
ION-I(IGl)
\B-WMFIREL,D
B-L
>
B-L
B-R J/B
CHARGING
1.25
B-L
0.85B-
O.S5B-
B-Wg;EL&PUMP
CONNECTOR1.25
TURN-SiGNAL LIGHT
59 (D-04)AND HAZARD LIGHT1
COMBINATION
METER
1.25i
1. 251r------
1II11. 25FI/III/III1III///
I1. ;II/
L------.1.
:
1mCOMBINATION
METER
(SPEEDOMETER)
I
(F>1.25B-W
G-I
(F)2B-W7-l
j
1FUEL
PUMP
IGNITIONS(c-53)
G-Ei(F-14)
NOTE::CONVERTIBLE
HR05M09AB
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Downloaded from www.Manualslib.com manuals search engine CHASSIS ELECTRICAL - Meters and Gauaes
SERVICE SPECIFICATIONS
Items
Standard values
Speedometer indicationerror
mph
2019-22
4038-44
1 57-66
1 76-88I
1001 94-110I
Tachometerindicationerrorrpm1,000f 100
3,000
f150
5,000f 250
6,000
Ik 300
Fuel gauge unit resistance R/ Point F_I3f2I
Point E
Fuel gauge unit float heightPoint F
mm (in.)
Point E
Engine coolant temperature gauge unit resistance [at 70°C (158”F)] Q110+7
18.6-21.6 (.73-.85)193.4-l
96.4 (7.61-7.73)
104 f 13.5
Fuel gauge resistance QBetween A - B/ Approx. 254I
Between A - CApprox. 101I
Between B - CApprox. 153I
Enginecoolant temperature Between A - B
gauge resistance QBetween A - CApprox. 51
Approx. 139
Between B
- C/ Approx. 190I
Oil pressure gauge resistance QApprox. 42I
Pressure gauge resistance QApprox. 72ISEALANT
ItemsSpecified sealantType
Engine coolant temperature gauge3M Nut Locking Part No. 4171 or Semi-drying sealant
unitequivalent
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Downloaded from www.Manualslib.com manuals search engine 54-18CHASSIS ELECTRICAL - Meters and Gauges
OPERATION
l
When the ignition key is at the “ON” position,the fuel gauge is activated.
l
When there is much fuel, the unit’s resistanceis small and the current flowing in the circuit
is great, so the gauge’s indicator indicates inthe “F” area.
l When there is little fuel, the unit’s resistance
is high and the current flowing in the circuit
is small, so the gauge’s indicator indicates inthe
“E” area.

lWhen the ignition key is at the “ON” position,
the engine coolant temperature gauge is acti-
vated.l
When the engine coolant temperature is high,
the unit’s resistance is low and there is a greatflow of current in the circuit, so the gauge’s
indicator indicates in the “H” area.
l
When the engine coolant temperature is low,
the unit’s resistance is high and there is a smallflow of current in the circuit, so the gauge’s
indicator indicates in the “C” area.
/Speed sensor (electrical speedometer type)>l Pulses are produced in accordance with the
vehicle speed, and vehicle-speed signals areinput to systems (the MFI system, etc.) that
regulate according to the vehicle speed.
TROUBLESHOOTING HINTS
1.The fuel gauge doesn’t function, or shows the
incorrect indication.
(1) Disconnect the connector of the fuel pumpand gauge unit assembly; the ‘F” side is
indicated when terminal (5) is then
grounded.l Check the fuel gauge.
2.The engine coolant temperature gauge doesn’t
function, or shows the incorrect indication.
(1)The “l-l” side is indicated when the connector
of the engine coolant temperature gauge
unit is disconnected and then grounded.l
Check the engine coolant temperature
gauge unit.
3. Systems dependent upon control according to
the vehicle speed do not function correctly.l Check the reed switch (mechanical
speedometer type)l Check the speed sensor (electrical
speedometer type)
coil pressure gauge>l
When the ignition key is at the “ON” position,
the oil pressure gauge is activated.
lWhen oil pressure is high, the internal contacts
of the gauge unit are kept closed for a longerperiod of time. This causes more current to
flow in the circuit, and the gauge pointer swings
to the high pressure side.
lWhen oil pressure is low, the internal contactsof the gauge unit open in a shorter period of
time. Therefore, there is less current flowing
in the circuit and the gauge pointer swings to
the low pressure side.

lWhen the ignition key is set to the “ON” position,the gauge indicator will be at
“0”.l
When the engine is started, the indicator will
move from
“0” to the minus (-) side, and then,as the boost level increases, it will move to
the plus
(+) side.
l When the ignition key is placed in the “ON”
position, the voltage gauge operates and indi-
cates a battery voltage of approximately 12 V.l
When the engine is started, the voltage gauge
indicates a battery voltage of 12 to 16 V, indicat-ing that the battery is on charge.
4. The oil pressure gauge doesn’t function, or
shows the incorrect indication.
(1)The “H” side is indicated when the connectorof the oil pressure gauge unit is discon-
nected and then grounded.l Check the oil pressure gauge unit.
5.The meter illumination light does not illuminate.
(1) The tail lights illuminate.l Check the rheostat.
6. The voltage gauge doesn’t function, or shows
the incorrect indication.l Check the voltage gauge.
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Downloaded from www.Manualslib.com manuals search engine 54-26CHASSIS ELECTRICAL - Meters and Gauges

Free
r&Hers -
Sear wheels raised on jack>
?qi&%!g
Rigid rack oooo2297
Anchor plate
-w216AO864
bracket
/IZ16FO13300002298ON-VEHICLE
SERVICEINSPECTION
SPEEDOMETER CHECK
(1) Assure tire pressure at standard value. (Refer to GROUP
- Specifications.)
(2)Gt the vehicle on a speedometer tester.
(3)Set free rollers securely on the floor according to the wheel-base and rear tread of the vehicle (when rear wheels
are to be set on free rollers).
(4) Raise the rear wheels on a jack and place rigid racks
to support the specified positions of the side sills (whenrear wheels are to be raised on a jack).
(5) Make sure the parking brake has been set.
cPWD>
(6)Attach anchoring bars on the tie-down brackets and secure
their ends to the anchor plates.(7) Make sure the tension on the right and left bars is the
same. Also be sure there is enough tension on each bar.(8) Attach a chain or wire to the rear tie-down hole. Make
sure the end of the wire or chain is secured firmly.
(9) Take all other necessary precautions.
(1O)Use a speedometer tester to measure the speedometer’s
indication error.
Standard value:
Standard indication
mph
Allowable range mph
2019-22
4038-44
8057-66
1 801 76-88--I
1 100
Caution
1 94-110
Do not operate the clutch or accelerator abruptly or
decelerate during the operations.
d
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Downloaded from www.Manualslib.com manuals search engine CHASSIS ELECTRICAL - Meters and Gauges54-31
COMBINATION METERS
LREMOVAL AND INSTALLATION
76FO22200002364
NOTE
*: 1992 models
L/
:i:
- lnstiument PineI.)
2. Column cover, lower
3. Column cover, upper 1. Knee protector (Refer
G GROUP 52A4. Meter bezel
* ’5. Combination meter
Removal steps6. Adapter* (Mechanical speedometer
type) /Washer tank (Refer to GROUP
51 - Windshield Wiper and Washer.)7. Vehicles speed sensor (Electrical
Front of ve
219FOl;
speedometer type)REMOVAL SERVICE POINTS
dAbCOLUMN COVER LOWER / COLUMN COVER
UPPER REMOVAL
After the screws have been removed, remove the covers,while making sure not to break the grippers.
dB, ADAPTER REMOVAL TYP-
(1) Disconnect the speedometer cable at the transaxle
end of the cable.
(2) Pull the speedometer cable slightly toward the vehicleinterior, release the lock by turning the adaptor to
the left or right, and then remove the adapter.
Adapter-Y16FO129],
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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
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Downloaded from www.Manualslib.com manuals search engine ALPHABETICAL INDEX0
OIL
Transmission, Replacement
eAWD>...........................................22-15- 1CFwD>............................................22-4-l
COOLER
Engine.............................................
11-36-lTransaxle..........................................23-62-lCOOLER HOSES, Transaxle..........................23-62-l
COOLER TUBES, Transaxle...........................23-62-lFILTER, Engine, Maintenance..........................00-48-l
LEVEL, Gear, Check LEVEL, Transmission, Check
............................................22-15-l.............................................22-4-lPAN................................................11-23-l
PRESSURE SWITCH, Power Steering, Check.........37A-13-l
SCREEN............................................11-23-lOPTICAL HORN LENS..............................54-106-11
P
PARK/NEUTRAL POSITION SWITCHAdjustment.........................................23-53-l
On-vehicle Inspection.........................13A-113,230-l
PARKING BRAKE......................................36-8-l
CABLE..............................................36-5-l
LEVER..............................................
36-5-lStroke Check........................................36-4-l
SWITCH, Check......................................36-4-l
POP-UP SWITCH...................................54-109-11
POSITION DETECTION SWITCH.....................338-19-l
POSITIVE CRANKCASE VENTILATION
SYSTEM, Inspection..................................
17-56-l
VALVE..............................................17-56-l
POWER STEERING
Stationary Steering Effort Check.......................37A-9-lFLUID............................................37A-10-I
GEAR BOX........................................37A-18-l
HOSES...........................................37A-33-l
OIL PRESSURE SWITCH, Check....................37A-13-l
OIL PUMP........................................37A-29-l
Pressure Test.....................................37A-12-l
PRESSURE SWITCH
On-vehicle Inspection.........................13A-121,235-l
POWER WINDOW....................................42-44-l
PROPELLER SHAFT...................................25-3-l
PROPORTIONING VALVE, Function Test.................35-65-l
PURGE CONTROL
SYSTEM, Check
.......................................17-58-l
...........................................17-60-lVALVE ......................................17-64-l
PURGE PORT VACUUM, Check........................17-63-l
R
RADIATOR............................................14-5-l
CAP, Pressure Test....................................14-4-l
RADIO.............................................54-186-11
ANTI-THEFT SYSTEM..............................54-156-11
RADIO REMOTE-CONTROL.........................64-l 86-k
REAR OIL PUMP, 4WS...............................378-11-l
DISCHARGE FLOW VOLUME, Check..................378-5-l
REAR WINDOW DEFOGGER........................54-192-11
SWITCH..........................................54-203-11
REFRIGERANT
Leak Repair Procedure..............................55-28-lLINE.....................................55-79-l......................................55-48-lREGULATOR, Door...................................42-43-lRELEASE CYLINDER, Clutch...........................21-16-lRESISTOR...........................................55-32-lRHEOSTAT........................................64-110-11
RIGHT MEMBER.......................................32-8-l
S
SEATFront
...........................................
52A-17-lRear . ............................................52A-25-lSEAT BELT.........................................52A-26-ISELECTOR LEVER...................................23-59-l
Operation Check....................................
23-51-lSENSORBarometric Pressure..............................Refer to B
Brake Fluid Level, Check.............................35-64-l
Camshaft Position................................Refer to C
Crankshaft Position...............................Refer to CEGR Temperature................................Refer to E
Engine Coolant Temperature.......................Refer to EFrontlmpact......................................528-68-IGcACTlVE EC%
..................................338-l 8-l.....................................35-117-l
Heated Oxygen..................................Refer to H
Induction Control Valve Position.....................
Refer to IIntake Air Temperature.............................Refer to I
Knock..........................................RefertoKSteering Angular Velocity...........................338-l 8-l
Throttle Position..................................
Refer to T
Vehicle Speed...................................Refer to V
Volume Air Flow..................................Refer to VWheelSpeed....................................Referto WSHIFT LEVER............................................22-16-lcFWD>.............................................22-8-l
SHIFT LOCK MECHANISM, Check......................23-52-lSHOCK ABSORBER............................................34-36-lcFWD>............................................34-13-lSOLENOIDEGR ...................17-70-IEGR, On-vehicle Inspection...................13A-164,269-l
Evaporative Emission Purge.......................
Refer to EFuel Pressure...................................Refer to F
Turbocharger Waste Gate.........................Refer to TSPARK PLUGMaintenance.......................................00-46-I
CABLE............................................
16-36-11SPEAKER..........................................54-187-11SPEEDOMETER CABLEReplacement............................................23-~-1 SPEED SENSOR, Wheel CABS>.......................35-113-l
SPEED SENSOR, Wheel, Output Voltage Measurement....35-75-lSRSMaintenance.......................................00-53-IDIAGNOSIS UNIT (SDU)............................528-71-ISTABILIZER BARFront Suspension.................................33A-12-l
Rear Suspension
...........................................34-38-l...........................................34-16-l