1991 MITSUBISHI ECLIPSE fuel

14-64FUEL SYSTEM -MPI System Inspection <1.8L Engine>
Idle speed controlservo connector
6FU098t(3) Disconnect the idle speed control servo connector.
(4) Connect DC
6V between terminals @) and @ of the idle
speed control servo connector, and then measure the
resistance between terminals
@ and @ of the motor
position sensor connector when the idle speed control
servo is activated (caused to expand and contract).
Standard value: Smooth increase/decrease in accord-
ance with extension and retraction of
idle speed control servo plunger.
Caution
Apply only a 6V DC or lower voltage. Application of
higher voltage could cause locking of the servo gears.
(5) If there is a deviation from the standard value, or if the
change is not smooth, replace the idle speed control servo
assembly.
OXYGEN SENSORN14QDBAb
INSPECTIONCaution
1. Before checking, warm up the engine until engine
coolant temperature reaches 85 to
95°C (185 to 205°F).2. Use an accurate digital voltmeter.
(1) Disconnect the oxygen sensor connector and connect a
voltmeter to the oxygen sensor connector.
(2) While repeating engine racing, measure the oxygen sensor
output voltage.
EngineOxygen sensor
output voltageRemarks
Race0.6- 1 .OVMake air-fuel mixture
rich by accelerator
operation
NOTEFor removal and installation of the oxygen sensor, refer
toGROUP 11
- Exhaust Manifold.
Oxygen sensor installation torque:
40
-50 Nm (30 - 36 klbs.)
EGR TEMPERATURE SENSOR NIIRCHA~Refer to GROUP 25
- Exhaust Gas Recirculation System.
VEHICLE SPEED SENSORN14QEEBaRefer to GROUP 8
- Meters and Gauges.
AIR CONDITIONER SWITCHRefer to GROUP 8
- Column Switch.
N14QQABa

FUEL SYSTEM - MPI Svstem InsDection <1.8L Engine>14-65
3FUO349
/--
’ 3FU03991
Idle speed controlservo connector(motor side, front view)
3FUO393
INHIBITOR SWITCHN14QRACsRefer to GROUP 21
- Service Adjustment Procedures.
POWER STEERING OIL PRESSURE SWITCH
N14flCJBRefer to GROUP 19 for power steering system inspection.
INJECTORSN14QTAGCHECKING OPERATION SOUND
Using a sound-scope, check the operation sound (“chi-chi-chi”)of injectors during idling or during cranking.
Check that as the rotating speed increases, the frequency of
the operating sound also increases.
Caution
Note that even if the injector you are checking is not
operating, you will hear the operating sound of the other
injectors.
NOTEIf no operating sound is heard from the injector that is being
checked, check the injector drive circuit. If there is nothing
wrong with the circuit, a defective injector or engine control
unit is suspected.
MEASURING RESISTANCE BETWEEN TERMINALS
(1) Remove the injector connector.
(2) Measure the resistance between the terminals.
Standard value: 13
- 16 L(Z [at 20°C (68”F)I(3) Install the injector connector.
IDLE SPEED CONTROL SERVO
INSPECTION
NlQQUAAb(1) Disconnect the idle speed control servo connector.
(2) Check continuity of the idle speed control servo coil.
IMeasuring terminalsIContinuityI
@ - @ Conductive5 to 35 fi resistance
at 20°C (68°F)

14-66FUEL SYSTEM -MPI System Inspection 4.8L Engine>
6FU1253
-1 Batterv
I6FUO751
03AOO50
03AOO57(3) Connect
6V DC between terminal @ and terminal @ of the
idle speed control servo connector, and check to be sure
that the idle speed control servo operates.
CautionApply only a 6V DC or lower voltage. Application of
higher voltage could cause locking of the servo gears.
(4)
If not, replace idle speed control servo as an assembly.
CONTROL RELAY
INSPECTION
NWWAE(1) Remove the control relay.
(2) Inspect the continuity between the control relay terminals.
Inspection terminalsContinuity
l---$+-l Yes (approx. 9552)
B-0
@-@
~~~
Yes (approx. 35Q)
Yes in 1 direction only(3) Use jumper wires and connect control relay terminal
@ to
the battery
@ terminal and terminal @ to the battery @
terminal.Caution
Be very careful when connecting the jumper wires
because the relay will be damaged if a mistake is made
with the contact terminals.
(4) With the battery
0 terminal jumper wire connected and
disconnected, check the continuity between control relay
terminals @-@I.
Continuity between terminals 0-B(5) Use jumper wires to connect control relay terminal
@I to
the battery
@ terminal and terminal @ to the battery 0
terminal.(6) With the battery
0 terminal jumper wire connected and
disconnected, check the continuity between control relay
terminals @-@I.
Continuity between terminals 0-a
1(7) Replace the control relay if faulty.

FUEL SYSTEM - MPI System Inspection <1.8L Engine>
POWER TRANSISTOR
Refer to GROUP 8
- Ignition System
14-67
NlQRCGAAIR CONDITIONER POWER RELAY
Refer to GROUP 24
- Air Conditioner.
N14RCLBPURGE CONTROL SOLENOID VALVE
N14RCKARefer to GROUP 25
- Evaporative Emission Control System.
EGR CONTROL SOLENOID VALVE
N14RCLARefer to GROUP 25
- Exhaust Gas Recirculation System.

14-68FUEL SYSTEM - MPI System Inspection <2.0L DOHC Engine>
MPI SYSTEM INSPECTION <2.0L DOHCCOMPONENTS LOCATION

Throttle
Dosition sensor
Crankshaft angle sensor
‘DC sensor
N14PAANIgnition timing adjustment terminal
Fuelpumpcheck terminal
I /B \ Q-terminalFuelpump check\Ignition timing adjustment terminal
Fuelpumpcheck terminal
ustment terminalir-flow sensor
takeair temperature sensor
arometric pressure sensornhibitor switch (A/T only)
OlA040i

FUEL SYSTEM - MPI System Inspection <2.0L DOHC Engine>
EGR control solenoid valve
[Calif. only]
Purge control solenoid valve
1
/AF--Y:rIgnition coil, Power transistor
Oxygen sensorPower
steering fluid Dressure switch
Coolant temDerature sensor

14-70FUEL SYSTEM - MPI System Inspection <2.0L DOHC Engine>

Throttle position sensor
tm\ m24-T.\/ \Waste aate control valve [Turbo
only1
IO;A0455I nition timing adjustment terminal
9uel pump check terminal
----Fuel
pump checkAir-flow sensor
Intake air temperature sensor
BarometricDressure sensor
1 (built in intakeair’ Y/I
I
iemperature sensor andbarometricpressure sensor) Lsensor

FUEL SYSTEM - MPI System Inspection <2.0L DOHC Engine>
InjectorII
01A0499
/
Purge control
Fuel pressureII solenoid valve
control valve
solenoid valve
0110503Ignition coil, Power transistor
IOxvnen sensorEGR control solenoid valve
[Calif. only]
Purge control solenoid valve
Fuel pressure control valve [Turbo only]
\’
\
16A0803Detonation sensor
\Power steering fluid oressure switch