1992 MITSUBISHI 3000GT oil temperature

Downloaded from www.Manualslib.com manuals search engine CIRCUIT DIAGRAMS - Cooling Circuit185

OPERATIONThe engine control module controls the power
transistors (high speed and low speed) in the moduleto provide radiator fan motor and condenser fan
motor rotation controls in accordance with the engine
coolant temperature and vehicle speed.
NOTEIn the event of faulty water temperature sensor,
the engine control module commands the fan motors
(for both radiator and condenser) to rotate at high
speeds.1. Radiator Fan (Low Speed Rotation)
l
When the engine control module turns onthe power transistor (low speed) in the
module, the current flows from the ignition
switch to the engine control module throughthe radiator fan motor relay (LO) coil.
If the current flows to the fan motor relay
coil, the switch of the relay turns on to supplythe motor driving power (for low speed
rotation). This will cause the current to flow
from the battery to the ground through the
radiator fan motor, relay switch and resistor,rotating the radiator fan at low speeds.
2. Condenser Fan (Low Speed Rotation)
l
The power from the NC compressor lock
controller turns on the condenser fan motorrelay (LO) to rotate the condenser fan at
low speeds.3. Radiator Fan, Condenser Fan (High
Speed Rotation)l
When the engine control module turns onthe power transistor (high speed) in the
module. the radiator fan motor relay (HI)
and condenser fan motor relay (HI) will
operate and the motor driving power (for
high speed rotation) is sent to the radiator
fan motor and condenser fan motor to rotate
the radiator fan and condenser fan at high
speeds.
TROUBLESHOOTING HINTS1. Neither the radiator fan nor condenser
fan rotate at all.
l Check fusible link No. 5.
2. Only the condenser fan does not
operate.l Check dedicated fuse No. 8.
3. The condenser fan do not operate in the
low speed mode, but operate otherwise.
(1) The A/C compressor magnet clutch does
not enter the “ON” state.l Check whether the output of the air
conditioning compressor lock controller
unit is available.
(2) The A/C compressor magnet clutch enters
the “ON” state.l
Check the condenser fan motor relay
(LO)-4. The radiator fan and condenser fan do
not operate in the high speed mode, but
operate otherwise.l Check the engine control unit.
Fan Operating Mode
VehicleA/C compressor lockspeedcontroller output
k%
80 or less[50 or less]
LO
(OV)
80 or more[50 or more]HI (12V)
,_ -
Engine coolanttemperature
$1
Approx. 95 [203] or less
Approx. 95
[203] or more
Approx. 105
[221] or more
Approx. 105
[221] or less
Approx. 105
[221] or more
Approx. 105
[221] or less
Approx. 105
12211 or moreTransistor
Transistor
in enginein engineRadiatorCondensercontrol unitcontrol unitfanfan
Low speedHigh speed
OFF
OFFOFFOFF
ONOFFLow speedOFF
ON
ONHigh speedHigh speed
OFF
OFFOFFOFF
ONONHigh speedHigh speed
ON
OFFLow speedLow speed
ON
ONHigh speedHigh speed
1 TSB Revision1

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 CHASSIS ELECTRICAL - Meters and Gauges54-13
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I1.25R-Wr-h
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COMBINATION
GAUGE
(D-09)!
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I
ENGIN'ECONTROL MODULE
OILPRESSURE
E#F"
(B-36)HRlOMOOAB
ENGINECOOLANT
TEMPERATURE
GAUGE UNIT
(B-01)
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Downloaded from www.Manualslib.com manuals search engine CHASSIS ELECTRICAL - Meters and Gauges54-17 ~
B-lIv
NOTEZl:HATCHBACK:E:CONVERTIBLE
ELC
4A/TG-W,,13---------, '-'I8I2I
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COMBINATION
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ENGINER--Y
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RHEOSTAT
(D-40)ILL
:(D-15)
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OIL
tzi&PREUNITZ(8-36)
(F>R-
TEMPERATURE
(B-01) mm Em cm)(c-69)-(D-03)
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(D-40)(D-41)(m)
=qJ p$EgqHRlOM02AB
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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 CHASSIS ELECTRICAL - Meters and Gauges
COMBINATION GAUGESREMOVAL AND INSTALLATION
54-33
Removal steps
1. Instrument panel(Refer to GROUP 52A
- InstrumentPanel.)
0 Distribution duct[Refer to GROUP 55 - Ventilators
(Instrument Panel).]
2. Combination gaugeDISASSEMBLY AND REASSEMBLY
i;
Disassembly steps
1. Gauge bracket2. Gauge glass
3. Window plate4. Voltage gauge
or
pressure gauge
5. Oil pressure gauge
6. Engine coolant temperature gauge
7. Printed-circuit board
8. Gauge caseTSB Revision
J

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 ALPHABETICAL INDEX1
A
iiABSPOWER RELAY, Check . . . . . . . . . . . . . . . . . . . . , . . .
35-82-lRELAY.............................................35-110-1SIGNAL, On-vehicle Inspection.................13A-176,277-iACCELERATOR
CABLE..............................................
17-4-l
SWITCH
...............................23-51-l
........................17-4-l
ACTIVE AERO SYSTEM, Check.........................
51-7-l
ACTIVE EXHAUST
CONTROL UNIT, On-vehicle Inspection..........13A-173,274-lSYSTEM............................................15-40-l
AERO PARTS........................................51-19-lAIR BAG..........................................520-74-lMODULE......................................528-82, 87-lAIR CLEANER.........................................15-9-l
ELEMENT, Maintenance..............................00-45-lAIR CONDITIONING...................................55-3-l
.....................................55-54-l
.......................................55-6-lCOMPRESSOR.....................................55-79-l COMPRESSOR DRIVE BELT, Adjustment...............
55-18-lCONTROL PANEL...................................55-73-lCONTROL UNIT.....................................55-73-lENGINE COOLANT TEMPERATURE SWITCHEngine Cooling.....................................14-13-l.....................................55-79-l......................................55:53-lPOWER RELAY.....................................55-29-lPOWER TRANSISTOR...............................55-74-lSWITCH............................................55-33 -1Emission Control....................................17-65-lOn-vehicle inspection.........................13A-123,236-lANTENNAMotor............................................54-188-11FEEDER CABLE...................................54-188-11ANTI-LOCK BRAKE SYSTEM....................Refer to ABS
ASSIST LINK ..................................34-35-iAUTOMATIC TRANSAXLE.............................23-64-l
Maintenance
.........................................00-49-IAXLE
Rear
............................................27-6-l............................................27-2-l
HUB, Rear -&VD>
....................................
27-4-lSHAFT ......................................27-16-l
B
BALL JOINT SEALS, Maintenance. . . .
BAROMETRIC PRESSURE SENSOR
On-vehicle Inspection . . . . . . . . . . . .BASIC IDLE SPEED, Adjustment . . . . . .
BATTERY . . . . . . . . . . . . . . . . . . . . . . . . . .
Discharged, Remedy . . . . . . . . . . . .
BELT LOCK CONTROLLER . . . . . . . . .
BLOWER. . . . . . . . . . . . . . . . . .
BOOSTER, Clutch . . . . . . . .BOOST METER, On-vehicle InspectionBRAKE
Parking. . . . . . . . . . ..*.............
BOOSTER . . . . . . . . . . . . . . . .
Operating Check . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . .00-52-l
..........13A-91,217-l..............
13A-55-l................64-3-11................35-82-l............55-32,74-t................
55-35-l.................21-6-l.........13A-171,273-l
.................36-8-l................35-87-l................35-64-l
DISC..........................................35-93,103-l
Front, Check.......................................35-70-IRear, Check........................................35-73-lFLUID LEVEL SENSOR, Check........................35-64-l
HOSES, Maintenance.................................00-52-I
LINE................................................35-91-lLINING.............................................35-74-lPAD
Disc, Front.........................................
35-66-l
Disc, Rear.............~..................>..........35-71-lPEDAL.............................................35-84-l
Check and Adjustment......................
:........35-63-lBUMPERFront...............................................51-8-lRear...............................................51-13-l
CAMSHAFT
OIL SEALS..........................................
11-21-lPOSITION SENSOR, On-vehicle Inspection......13A-103,225-lCATALYTIC CONVERTER..............................17-71-l.......................................15-30-l
.
..........................................
15-33-lCD AUTO CHANGER................................54-191-11CENTER PILLAR GLASS..............................42-33-l
CENTRAL DOOR LOCKING SYSTEM...................42-49-lCHARGE AIR COOLER................................15-11-l
CHARGING SYSTEM..................................l.6-2-11CIGARETTE LIGHTER..............................54-123-k
CLOCK SPRING, SRS..............................528-74-I
CLOSED THROTTLE POSITION SWITCH
Adjustment.......................................
13A-57-lOn-vehicle Inspection.........................13A-101,223-lCLUTCH
BOOSTER OPERATING, Check .................21-6-lCONTROL..........................................21-l O-ICOVER.............................................21-20-lDISC...............................................21-20-I
MASTER CYLINDER.................................21-14-lPEDAL..............................................21-8-lCheck and Adjustment................................21-5-l
RELEASE CYLINDER................................21-16-IVACUUM LINE cAWD>...............................21-18-I
COLUMN SWITCH..................................54-112-11COMBINATION GAUGES.............................54-33-kCOMBINATION LIGHT...............................54-106-11COMBINATION METERS.............................54-31-11COMPRESSOR CLUTCH RELAY,On-vehicle Inspection...........................13A-123,236-lCONDENSER.....................................55-79-l.....................................55-79-l CONTROLLER, Belt Lock..............................55-32-lCONTROL UNIT
Active Exhaust, On-vehicle Inspection...........13A-173,274-lECS.............................................338-20-I
Electronic CABS>..................................35-119-l
CONTROL VALVE.....................................37B-9-l
Fuel Tank Pressure..................................13F-6-IInspection..
........................................17-65-l
CRANKSHAFT
FRONT OIL SEAL....................................
11-25-lPOSITION SENSOR, On-vehicle Inspection......13A-107,227-l
REAR QIL SEAL.....................................11-26-l