1991 MITSUBISHI ECLIPSE sensor

FUEL SYSTEM - MPI System Inspection <1.8L Engine>
outputDiagnosis code
referenceDiagnosis itemCheck item (Remedy)
orderOutput signal patternNo.Memory
7Engine coolantRetainedl Harness and connectortemperature sensor
:-rlrLn- 2’
l Engine coolant temper-
ature sensor
12A0107
8Crank angle sensor
:nn 22
Retainedl Harness and connector
(If harness and connector
are normal, replacedistributor assembly.)
12A0107
9No. 1 cylinder top
dead center sensorH
Lnn 23
Retainedl Harness and connector
(If harness and connector
are normal, replacedistributor assembly.)
12A0107
10Vehicle speed sensor24Retainedl Harness and connector
(reed switch)H
Lu 1 nnJln
l Vehicle speed sensor
(reed switch)
12A0107
11Barometric pressure25Retainedl Harness and connector
sensorH
u I nl-uvln
(If harness and connector
are normal, replace
Lbarometric pressure
12A0107sensor assembly.)
12Ignition timing adjust-36-l Harness and connectorment signalH
LUUI nluvuuL
12R0468
13Injector
:m 41
Retainedl Harness and connector0 Injector coil resistance
12A0105
14Fuel pump42Retainedl Harness and connectorH0 Control relay
LUUUI nn
12A0105
15EGR 43Retainedl Harness and connectorl EGR temperature sensor
H
u u u u-inn
l EGRvalvel EGR valve control sole-Lnoid valve
12A0105l EGR valve control vacuurr
16Normal state---H
Ln
12A0104
NOTEReplace the engine control unit if a malfunction code is output although the inspection reveals that there is no problem with the check
items.

14-62FUEL SYSTEM - MPI System Inspection <1.8L Engine>
INTAKE AIR TEMPERATURE SENSORNlmNABAir flow sensor
side connectorINSPECTION(1) Disconnect the air flow sensor connectors.
(2) Measure resistance between terminals
@ and @.
6FUO622
Temperature “C PF)Resistance kR
0 (32)6.0
20(68)2.780(176)
0.4(3) Measure resistance while heating the sensor using a hair
drier.
Temperature “C (“F)Resistance kfi
HigherSmaller(4) If the value deviates from the standard value or the
resistance remains unchanged, replace the air flow sensor
assembly.
ENGINE COOLANT TEMPERATURE SENSOR
NWQABE
INSPECTION(1) Remove engine coolant temperature sensor from the
intake manifold.
(2) With temperature sensing portion of engine
cool?nttemperature sensor immersed in hot water, check resist-
ance.16R1251
Temperature “C (“F)Resi’stance kQ
0 (32)5.920(68)
2.5
40 (104)2.7
80(176)0.3(3) If the resistance deviates from the standard value greatly,
replace the sensor.
INSTALLATION(1) Apply specified sealant to threaded portion and tighten to
specified torque.
Specified sealant: MOPAR Part No.4318034
or equivalent
Specified torque: 20
- 40 Nm (15 - 29 ftlbs.)(2) Fasten harness connectors securely.

FUEL SYSTEM - MPI Svstem Inspection <1.8L Engine>18-63
Throttle position sensor
Groundoutput
Sensorpower
SUPPlY(5V)
1 FUO507
6FU1244Motor
Dosition sensor connector
(motor ‘side, front view)
T
6FU1247Motor position sensor
connector(motor side, front view)
6FU1252
THROITLE POSITION SENSOR
INSPECTION
Nl4OBBKa(1) Disconnect the throttle position sensor connector.
(2) Measure resistance between terminal
@I (sensor ground)
and terminal
@ (sensor power).
Standard value: 3.5-6.5
kGI(3) Connect a pointer type ohmmeter between terminal
@(sensor ground) and terminal
@ (sensor output).
(4) Operate the throttle valve slowly from the idle position to
the full open position and check that the resistance changessmoothly in proportion with the throttle valve opening
angle.(5) If the resistance is out of specification, or fails to change
smoothly, replace the throttle position sensor.
Throttle position sensor installation torque:
1.5
- 2.5 Nm (1.1 - 1.6 ftlbs.)
IDLE POSITION SWITCH
INSPECTION
N14QKADa(1) Disconnect the connectors of the motor position sensor.
(2) Check the continuity between terminal
@ and the body
ground.
IAccelerator pedalIContinuityI
DepressedINon-conductive (@J fl)I
ReleasedIConductive (0 fl)I(3) If defective, replace the idle speed control servo assembly.
MOTOR POSITION SENSOR
INSPECTION
N140lAJ(1) Disconnect the motor position sensor connector.
(2) Measure the resistance between terminals
@ and 0.Standard value: 4
- 6 kfi

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

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