MITSUBISHI ECLIPSE 1991 Service Manual

FUEL SYSTEM - Throttle Bodv <1.8L Engine>
Throttle position
sensor connectorINSPECTIONN14SHAC4
THROTTLE POSITION SENSOR CONTINUITY CHECK
(1) Measure resistance between terminals
@ and @ of the
throttle position sensor using a circuit tester.
Standard value: 3.5-6.5
kSZ(2) Check sensor body for cracks and damages.
6FU1398
I
control servo
connector
6FU1277
IIDLE SPEED CONTROL SERVO OPERATION INSPECTIONIDLE SPEED CONTROL SERVO CONTINUITY CHECK
Measure resistance between terminals @and @ using a circuittester.
Standard value: 5-35
Q [at 20°C (68”F)I
CautionApply only a 6V DC or lower voltage. Application of higher
voltage could cause locking of the servo gears.
(1) Connect 6V DC to terminals @ and @ and check that the
idle speed control servo extends and retracts by itself.
Idle speed controlservo motion
I
IWhen terminal @ is @(RetractsI
IWhen terminal @ is @)ExtendsI(2) If the idle speed control servo does not move, replace the
idle speed control servo assembly.
THROTTLE BODY COMPONENTS CLEANING
(1) Clean all components, but the following components must
not be cleaned by using a cleaning agent.
l Throttle position sensor
l Idle speed control servo assembly
The insulation of these components will be damaged if theyare immersed in a cleaning agent. They should be cleaned
by using only a piece of cloth.
(2) Check for clogging of the vacuum port or passage. Clean
the vacuum passage by using compressed air.

14-88FUEL SYSTEM - Throttle Body 4.8L Engine>
,
Throttle position
round
sensor output
7FUO535
Motor positionsensor connector
6FU1247SERVICE POINTS OF REASSEMBLYN14SGADa
1. INSTALLATlON.OF THROlTLE POSITION SENSOR
H
(1) Install throttle position sensor on throttle body and
temporarily tighten screw.
Caution
Adjust the throttle position sensor and idling speed
control according to the engine load condition.
(2) Check correct installation of the throttle position sen-
sor. While moving the throttle lever in both open and
close directions, that resistance between terminals
@and
@ or @ and @ changes. If resistance changes
smoothly, the throttle position sensor has been instal-
led correctly.
AFTER REASSEMBLY INSPECTION
IDLE POSITION SWITCH CONTINUITY CHECK
(1) Using a circuit tester, check continuity between the body
and terminal
@I when the throttle valve is fully closed and,riwhen fully opened.
Throttle valveIContinuityI
Fully closed
Fully openedConductive
Non-conductive(2) If otherwise than shown above, replace the idle speed
control servo assembly.

FUEL SYSTEM - Throttle Body <2.0L DOHC Engine>
THROTTLE BODYMl3s&c
sr REMOVAL AND INSTALLATION

11-16 ft.lbs.
Removal steps
1. Connection for accelerator cable2. Connection for breather hose
3. Connection for air intake hose4. Connection for air hose
C5. Connection for vacuum hose6. Connection for ISC motor and idle switch
connector
7. Connection for TPS connector8. Connection for water hose
9. Connection for water by-pass hose
10. Ground plate mounting screw
11. Throttle body stay and ground plate12. Air fitting
13. Gasket14. Throttle body
l * 15. Gasket03A0285
!Fbeverse the removal procedures to reinstall(2) l + : Refer to “Service Points of Installation”.(3) m : Non-reusable parts

14-90FUEL SYSTEM - Throttle Body <2.0L DOHC Engine>
r
Air intake
plenum side
03AO259JDISASSEMBLY AND REASSEMBLYSERVICE POINTS OF INSTALLAtlON
Nl49DAU15. INSTALLATION OF GASKET
GInstall the gasket so that the projection is where shown in
._the figure.
Caution
Poor idling, etc. may result if the gasket is installed
incorrectly.
1.5-2.5 Nm
1.1-1.8 ftlbs.
Nl49C92.5-4.5
Nm1.8-3.3 ft.lbs.MU1427
Disassembly steps
1. Throttle position sensor
2. Idle position speed control servo
3. Idle position switch
4. Adjusting nut
5. Throttle body
NOTEReverse the disassembly procedures to reassemble.

FUEL SYSTEM - Throttle Bodv <2.0L DOHC Erwini+
i
6FU1244
Ground
Throttle
position
sensor
output
Throttle
position
sensorpower-source 6FUO7X
7FUOOlO
ISERVICE
~POINTS OF DISASSEMBLYNl4SFAF
Caution
1.When loosening a Phillips screw which, has been firmlytightened, use a Phillips screwdriverthat is an exact fit
for the screw.
2. Do not remove the throttle valve.
”
3.Be careful when removing the throtite pos?ion sensor
screw and the idle speed control servo- screw as they
have been coated with adhesive.
INSPECTIONNl4SNABTHROTTLE
POStTlON SENSOR CONTtNUlTY TEST
(1) Using a circuit tester, measure the resistance
beweenterminal
@ and terminal @ of the throttle position sensor
connector.Standard resistance:
3.5-6.5 k&2(2) While the circuit tester is connected to terminals
@ and @,or @ and @ of the throttle position sensor connector,
slowly operate the throttle valve until it is at its maximum
open position and check that the resistance changes
smoothly.
tDLE SPEED CONTROL SERVO CONTINUITY CHECK
Measure the resistance between each of the terminals.
Standard resistance:
Between terminal @ and either terminal
0 or 028-33 Q [at 29X t6WF)lBetween terminal
0 and either terminal@ or
@I28-33 P [at 20°C (68”F)l

14-92FUEL SYSTEM- Throttle Bodv <2.0L DOHC Engine>
Iw--
7FUOOl I
tDLE SPEED CONTROL SERVO OPERATIONAL CHECK
(1) Connect the positive terminal of a DC power supply of
approx.
6V to terminals @ and @ of the idle speed control .
~servo connector.
/(2) Holding the idle speed control servo as indicated in the
illustration, connect the negative terminal of the power
supply to each pair of its terminals in the order given below,and ascertain whether or not small vibration is created due
to the operation of the stepper motor.
0 Connect the negative terminal of the power supply to
terminal
@ and terminal @.
@ Connect the negative terminal of the power supply to
terminal
@ and terminal @I.
@ Connect the negative terminal of the power supply to
terminal
@ and terminal @I.
@I Connect the negative terminal of the power supply to
terminal
@ and terminal @I.
@ Connect the negative terminal of the power supply to
terminal
@ and terminal @.
@ Repeat the test in the order from step 5 to 1.
(3) The stepper motor is functioning properly if vibration is felt
each time.
CLEANING THROTTLE BODY PARTSN14SlAA
(1) Clean all parts. A cleanser should not be used to clean the
following parts:
l Throttle position sensor
l Idle speed control servo
l Idle position switch
Immersing these parts in cleanser damages the insulation.
Wipe them with a cloth only.
(2) Check that the vacuum port and passage are not plugged
up. Clean the vacuum passage with compressed air.
INSPECTION AFTER REASSEMBLY
tDLE POSITION SWITCH CONTINUITY CHECK
(1) Check the continuity between connector terminal
@ and
the body of the throttle position sensor both when the
throttle valve is at its completely closed position and at
maximum open position.
11(2) If the results of the test do not conform to the above,
replace the idle position switch.

FUEL SYSTEM - Fuel Tank
FUEL TANK cFWD>
,*. REMOVAL AND INSTALLATION
q?&g
NlMA-30-40 Nm
2-3 Nm22-29 ft.lbs.
---15-20 Nm
11-14 ft.lbs.
15-22 ft.lbs.Removal steps
l + 1. Return hosel +2. Vapor hose
3. Clamp
4. Fuel gauge unit connector
5. Electrical fuel pump connector
l + l q6. High pressure fuel hose
l + 7. Filler hose
l + 8. Vapor hose
~~ 9. Self-locking nut10. Tank band11. Fuel tank
l + 12. Vapor hosel + 13. Overfill limiter (Two-way valve)I)+ 14. Fuel gauge unitl + 15. Electrical fuel pump16. Drain plug
17. Fuel tank cap
18. Packing
19. Fuel filler neck$TEeverse the removal procedures to reinstall,(2) +e : Refer to “Service Points of Removal”:,,
(3) *+ : Refer to “Service Points of lnstallatlon .(4) m : Non-reusable parts

14-94FUEL SYSTEM - Fuel Tank
Outlet side_ Inlet side01
W838
Positioning projection
03A0220SERVICE POINTS OF REMOVALtilirro8AH
6. DISCONNECTION OF HIGH PRESSURE FUEL
H;OSECaution
Cover the hose connection with rags to prevent splash
of fuel that could be caused by some residual pressure
in the fuel pipe line.
INSPECTIONN14GCAll Check the hoses and the pipes for crack or damage.
l Check the fuel tank cap for malfunction.
l Check the fuel tank for deformation, corrosion or crack.
0,. Check the fuel tank for dust or foreign material.
NOTE
If the inside of the fuel tank is to be cleaned, use any one ofthe following:
(1) Kerosene
(2)
Trichloroethylene-(3) A neutral emulsion type detergent
OVERFILL LIMITER (TWO-WAY VALVE)
Set a hand vacuum pump at inlet side or outlet side; the valve
is good if, when a negative pressure (vacuum) is applied, air
flows after a slight negative pressure is initially maintained.
SERVICE POINTS OF INSTALLATION.
Nl4DDAL15. INSTALLATION OF ELECTRICAL FUEL PUMP
(1) Align the three positioning projections of the packing
with the holes in the fuel pump.
(2) When the fuel pump is installed, the holding bolt at the
lower side of the fuel tank should be installed first.
Care should be taken at this time that the O-ring is not
pinched.14. INSTALLATION OF FUEL GAUGE UNIT
Align the two positioning projections of the packing with
the holes in the fuel gauge unit.
Caution
When mounting the fuel gauge unit, incline the float at
the end leftward, and insert it into the fuel tank. Since
the reserver cap is provided in the fuel tank, the fuel
gauge unit will contact the reserver cap if the fuel
gauge unit is inclined rightward during insertion.
-
4
-,

FUEL SYSTEM - Fuel Tank
W304I I
I03FDO7 1
Tank band
03AO229
I I\ \\u\ I \I-
03AO189
?4-.03FOO7A 13’. INSTALLATION OF OVERFILL LIMITER (TWO-WAY
VALVE)
Install so that the overfill limiter is facing in the direction
shown in the figure.
12. CONNECTION OF VAPOR
HOSE/l. RETURN HOSE
When attaching the fuel hose to the pipe, be sure that the
hose is attached as shown in the illustration.
Standard value:
25-30 mm (l&1.2 t@.).”. .9. INSTALLATION OF SELF-LOCKING NUT
Tighten the self-locking nuts until the rear end of the tank
band contacts the body.
6. CONNECTION OF VAPOR
HOSE/7. FILLER HOSE
(1) The vapor hose should be connected all the way at the
tank, and approximately 40 mm (1.6 in.) at the filler
neck.(2) The end of the filler hose with the shorter straight pipe
part should be connected at the tank side.

FUEL SYSTEM- Fuel Tank
Flare nut
Se&e side 03~043
03FOO76. CONNECTION OF HIGH PRESSURE FUEL HOSE TO
FUEL PUMP
Temporarily tighten the flare nut by hand, and then tighten
;Jtit to the specified torque, being careful that the high
’pressure fuel hose does not become twisted.
Caution
When tightening flare nut, be careful not to bend or
twist line to prevent damage to fuel pump low
connection.2. CONNECTION OF VAPOR HOSE/l. RETURN HOSE
When attaching the fuel hose to the pipe, be sure that the
hose is attached as shown in the illustration.
Standard value:
25-30 mm (1 .O-1.2 in.)