sensor MITSUBISHI ECLIPSE 1991 Service Manual

21-266 AUTOMATIC TRANSAXLE -Transaxle Assembly <F4A33*W4A33>TRANSAXLE ASSEMBLY
DISASSEMBLY AND REASSEMBLY
<F4A33>
20.Pressure pla?e21.Brake disc22.Brake plate23.Reaction plate
24. Reverse sun gear25. Thrust bearing
#826. Thrust race
#9---
1.Torque converter2.Oil pump assembly3.Gasket4.Thrust washer #I5. Front clutch assembly
6. Thrust race #37. Thrust bearing #48. Thrust washer #227. l-or-ward sun gear
9. Rear clutch assembly28. Planetary carrier assembly
10. Thrust bearing #529.Thrust bearing#I0
11. Rear clutch hub30.Output flange
12. Thrust race
#631. Oil level gauge
13. Thrust bearing #732. Oil filler tube14.Kickdownband33.
Snap ring15.Kickdowndrum34. Kickdown servo switch16.Snap ring35.Snap ring
Ii524
23
TFA0405’36.
Kickdown servo piston
37.Spring
38.Anchor rod
39.Detent assembly40. Manual control shaft
41. Parking roller support
42.Oilpan43.Gasket44. Oil temperature sensor
45.Oil screen
46. Valve body assembly
47. Manual control lever
48.Inhibitor switch49. End clutch shaft50.Bearing retainer51.Thrust bearing #I152. End clutch hub53.Thrust washer
54. End clutch assembly
55.O-ring
56. End clutch cover
57.Pulse generator58:Lock bolt59.Idler shaft60.Idlergear61.Spacer
62.Gasket

21-268 AUTOMATIC TRANSAXLE -Transaxle Assembly <F4A33*W4A33>DISASSEMBLY AND REASSEMBLY
<W4A33>
TFA0409
1.Torque converter2.Oil pump assembly3.Gasket4.Thrust washer #I5.Front clutch assembly
6. Thrust race #37.Thrust bearing #48. Thrust washer
#29.Rear clutch assembly
10. Thrust bearing #511.Rear clutch hub12.Thrust race #613.Thrust bearing #714.Kickdown band15.Kickdown drum16.Snap ring
17.Center support18.Wave spring19.Return spring20.Pressure plate21.Brake disc22.Brake plate23.Reaction plate24.Reverse sun gear25. Thrust bearing #826.Thrust race #927. Forward sun gear
28.Planetary carrier assembly29. Thrust bearing #IO30.Output flange31.Oil level gauge32.Oil filler tube33.Snap ring34.Kickdown servo switch35.
Snap ring36.
Kickdown servo piston
37.Spring38.Anchor rod39.Detent assembly40. Manual control shaft
41. Parking roller support
42.Oilpan43.Gasket44.Oil temperature sensor45.Oil screen46.Valve body assembly47.Manual control lever48.Inhibitor switch49.End clutch shaft50.Bearing retainer51.Thrust bearing #I 1
52. End clutch hub
53.Thrust washer54. End clutch assembly55.O-ring
56. End clutch cover
57.Pulse generator58.Lock bolt59.Idler shaft60.Idler gear61.Spacer
62.Gasket

AUTOMATIC TRANSAXLE - Transaxle Assembly <F4A33*W4A33> 21-271
A01108. Remove the oil pan, magnet and gasket.
9. Remove the oil screen.
10. Remove the valve body mounting bolts (10).11. Remove the oil temperature sensor holder and then
remove the oil temperature sensor harness from the
clamp.12. Press the clips of the solenoid valve harness grommet,
push the grommet inside the case and remove the valve
body assembly.
13.
Pull out the oil temperature sensor.
14. Remove the parking roller support.

21-296 AUTOMATIC TRANSAXLE - Transaxle Assembly <F4A33*W4A33>76. Put the oil temperature sensor in the case.
77. Install an O-ring in the O-ring groove on top of the valve
body assembly.
78. Replace the solenoid valve harness grommet O-ring with anew O-ring.
79. Pass the solenoid valve connector through from the inside
of the transaxle case hole.
80. Insert the solenoid valve harness grommet in the case hole.,**%4
81. Temporarily install the valve body while inserting the detentplate pin in the manual valve groove. Then install the oil
temperature sensor and holder and tighten the bolts with
the specified torque.
A bolt
= 18 mm (.71 in.)
B bolt = 25 mm (.98 in.)
C bolt = 40 mm (1.57 in.)
Valve body assembly mounting bolts:
lo-12 Nm (7.5-8.5 fklbs.)
Caution
Fix the solenoid valve and oil temperature sensor
harness securely in the position shown.
82. Install the oil filter.
Oil filter mounting bolts: 5-7 Nm (4-5
ft.lbs.1

24-2HEATERS AND AIR CONDITIONING - Specifications
SPECIFICATIONS
GENERAL SPECIFICATIONSN24cA- -
ItemsSpecifications
Heater unit
TypeThree-way-flow full-air-mix system
Heater control switchDial type
Compressor
Model
lOPARefrigerant unit lubricantcc
(cu.in.1DENS0 OIL 6 or SUNISO 5GS80f20 (4.9&l .2)
V belt sizemm (in.)<1.8L Engine> 920 (36.2)<2.0L DOHC Engine> 940 (37.0)Dual pressure switch
High pressure switch
kPa (psi)OFF: 2,700 (384)ON: 2,100 (299)
Low pressure switch
kPa (psi)OFF: 210 (30)ON: 235 (33)
Freezer prevention“C (“F)Air temperature thermostat
OFF: 3 (37.4)ON: 4 (39.2)
Refrigerant and quantity
g bdR-12MAX 935 (33)
SERVICE SPECIFICATIONSN24CB.-
ItemsSpecifications
Standard valueAir
therm0 sensor and air inlet sensor standard
resistance value
n0°C (32°F)4,852f24315°C (59°F)2,341 f23425°C 177°F)1,500f 150Engine coolant temperature switch
Switch-OFF temperature
“C (“F) 112-118 (233-244)
Amount of
V belt deflection
mm (in.)
When new belt installed4-5
(.16-.2)When used belt installed5.5-6
(.22-.24)Amount of V-ribbed belt deflection
mm (in.)
When new belt installed4.5-5
(.18-.2)When used belt installed5.5-6
(.22-.24)
Clutch clearancemm (in.) 0.35-0.65 (.014-,026)
Condenser fan motor resistor resistance value
52 0.26-0.32
TORQUE SPECIFICATIONSN24CC-
ItemsNmft.lbs.Front housing installation bolt
24-2818-21
Compressor bracket tightening bolt
45-5533-39
Compressor tightening bolt
23-2717-19
Tension pulley center nut (bolt)
32-4824-36
Dual pressure switch
9-117-8
Engine coolant temperature switch
30-4022-28
k
- /.

HEATERS AND AIR CONDITIONING - Troubleshooting24-5
From previoys page.
When the resistance of the air-
therm0 sensor is measured[with the air conditioner switch
OFF and when the ambient
temperature of the
air-therm0sensor is
25°C (77“F)], is the
measured resistance approx.
1.5f0.15 kP?
INoMalfunction of tha air-therm0Refer to P.24-6.-sensor.
Refer to P.24-6.
1Yes
When the resistance of the air-
inlet sensor is measured [with the
air conditioner switch OFF andwhen the ambient temperature of
the air-inlet sensor is 25°C (77”F)l
is the measured resistanceapprox.
1.5f0.15 k&2?I
1 Yes
Does idle-up occur immediatelyNo Malfunction of the DC motor
after the air conditioner switch is
cl800 Engine>
switched ON?Malfunction of the stepper motor
Yes~2000 DOHC Engine>
Malfunction of the MPI control unit
* Malfunction of the air conditioner
control unit.Refer to P.24-6.

24-6HEATERS AND AIR CONDITIONING - TroubleshootingAIR CONDITIONER CONTROL
UNIT CIRCUIT
1 Battery IBlower switch
litalAir conditioner
IAir inlet Air outlet1-isensorsensor
temperature
Corn- L Tpressor
relayI IMagnetic
AclutchMPI control*Wire harness sideDescription of Operation
(1) A negative-characteristic thermistor is employed
for the air-therm0 sensor and the air-inlet sensorin order to convert the ambient temperature at
the sensor part to resistance.
The sensor power-supply voltage
(5V) of the air
conditioner control unit is applied to each sen-
sor.
(2) The compressor operation mode changes (fromOFF to ECONO to A/C...) each time the air
conditioner switch is pressed. When the air
conditioner switch is pressed in to the first step,the mode is changed to the ECONO mode (the
indicator illuminates in orange, and the voltage
at terminal 4 of the air conditioner switch
becomes Bv.
When pressed in to the second step, the mode
is changed to the air conditioner mode (the
indicator illuminates in green), and the voltage at
terminal 2 of the air conditioner switch becomes
Bv.Bv: Battery voltage
(3) The output (terminal 4) of the air conditioner
control unit is output when all of the following
conditions are satisfied.
@ The air conditioner switch is ON (ECONO or
A/C mode).
@ The air-therm0 sensor ambient temperature
(evaporator outlet air temperature) is
4°C
(39°F) or higher.
@ The air-inlet sensor ambient temperature
(evaporator intake air temperature) is
4°C
(39°F) or higher.

HEATERS AND AIR CONDITIONING - Troubleshootinq
-.
’ Wire harness sideTROUBLESHOOTING HINTS
Inspection of Air Conditioner Control Unit
Disconnect the amplifier and inspect the connector on the wireharness side as shown in the chart below.
Test Conditions:
(1) Ignition switch: ON
(2) Air conditioner switch: ON
(3) Temoerature control lever: MAX COOL2OAO405
(4j Bloier switch: HI
TerminalMeasurement item
Tester connectionConditions
Specified value
1Resistancel-6-1,500f150 sz ’at 25°C (77°F)
2
10
Voltage2-3
2-8Airtcchonditioner
ContinuityContinuity3-Ground
4-Ground
Resistance5-7
-ContinuityII
8-Ground-
Voltage9-3
9-8Therm0 sensor OFF78°C (172°F)
:5k (185°F)
Voltage10-3ECONO switch
10-8
System voltageov
Continuity
Continuity1,500+
150 s-2at 25°C (77’F)
Continuity
System voltageov
System? voltageov
If the connector on the wire harness side is correct, replace the air conditioner control unit.

24-8HEATERS AND AIR CONDITIONING - Troubleshooting
IARNESSES AND COMPONENTS LAYOUT DIAGRAM<Dash panel>
1. Air conditioner switch
2. Air conditioner control unit
3. Air-inlet sensor
4.
Air-therm0 sensor
36AOO51
NameSymbolAir conditioner control unit
DAir conditioner switch
GAir inlet sensor
FAir
therm0 sensorFBlower motor High relay
E
IrrIor:enser fan motor High-Low selecting
C
NameCondenser fan motor relay
Dual pressure switch
Engine coolant temperature switch
<2.0L DOHC Engine>
Heater relay
Magnetic clutch relay
Symbol
C
BA
H
C
NOTEThe “Name” column is arranged in alphabetical order.
q \
q ---

HEATERS AND AIR CONDITIONING - Service Adjustment Procedures 249*I3
--Air-therm0
sensor
Air inlet
sensor
E>aporator(3)
Set the gauge manifold in place and check whether or not
the pressure at the high-pressure side has become the
dual-pressure switch activation pressure.
(4) Replace the switch if, under ordinary conditions, there is no
continuity.Caution
The condition can be considered to be satisfactory if
there is continuity.
Never increase the pressure in a deliberate attempt to
obtain an abnormally high temperature, because to do
so risks blowing the compressor relief valve.AIR-THERM0 SENSOR AND AIR-INLET SENSOR
If frost forms on the surfaces of the evaporator fins, the cause
might be a malfunction of
air-therm0 sensor.
The temperature of the air-flowing from the evaporator’s outlet
is sensed by the thermistor, and the signals conveying this dataare input to the air conditioner control unit, thus switching the
compressor’s clutch ON or OFF.
This functions when the evaporator’s air-flow is low, or the
evaporator’s fins are clogged by dust, etc., or when the amountof refrigerant is insufficient.
These sensors detect the temperature within the passenger
compartment and the temperature at the cooling unit inlet,
thus causing changes of the resistance value, and this data is
provided to the air conditioner control unit as input.
How to Test the Therm0 Sensor and Air-Inlet Sensor
(1) Disconnect the sensor’s connector at the evaporator case,
and by using an ohmmeter, measure the resistance. The
resistance is normal if it is within the range shown in the
figure at the left; if the resistance is not normal, replace.
(2) If the sensor is normal, there is a malfunction of the air
conditioner control unit, and it should be replaced.
Standard value:
Passenger compartment temperature sensor resist-
ance value:
0°C (32°F)4,852+243 (S-2)
15°C (59°F)2,341+234 (S-2)
25°C (77°F)1,500+150 (52)
ENGINE COOLANT TEMPERATURE SWITCH
<2.0L DOHC Engine>
The engine coolant temperature switch is connected in series
with the compressor magnetic clutch power relay.
It disengages the compressor when the temperature of
engine coolant rises above
115°C (239°F).This is designed to prevent engine overheating when cooling
air is not sufficient for the condenser and radiator. If the enginecoolant temperature switch operates to disengage the com-
pressor, check for the condenser and radiator surface condi-
tions, belt tension and engine coolant level and correct, if
necessary.