1991 MITSUBISHI ECLIPSE engine

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

14-72FUEL SYSTEM - MPI Svstem InsDection <2.0L DOHC Engine>
MALFUNCTION INDICATOR LIGHTAmong the self-diagnosis items, a malfunction indicator light
comes on to notify the driver of the emission control items
when an irregularity is detected.
However, when an irregular signal returns to normal and the
engine control unit judges that it has returned to normal. the
malfunction indicator light goes out.
Moreover, when the ignition switch is turned off, the light goes
out. Even if the ignition switch is turned on again, the light doesnot come on until the irregularity is detected.
Here, immediately after the ignition switch is turn on, the
malfunction indicator light is lit for 5 seconds to indicate that
the malfunction indicator light operates normally.
I--l
klfunctionindicator light
Items indicated by the lightening malfunction light
Engine control unit
Oxygen sensor
Air flow sensor
Intake air temperature sensor
Throttle positron sensor
Engrne coolant temperature sensor
Crank angle sensor
Top dead center sensor
Barometric pressure sensor
Detonatron sensor
Injector
Fuel pump
EGR
Ignition co11
/
iMALFUNCTION INDICATOR LIGHT INSPECTION
When turning on the ignition switch, check that the light comes
on.
NOTEIf the light does not come on, check the harness and light for
breakage.

FUEL SYSTEM - MPI System Inspection <2.0L DOHC Engine>
SELF-DIAGNOSIS14-73
N14PAAEThe engine control unit monitors the input/output signals
(some signals at all times and the others under specified
conditions) of the engine control unit.
When it is noticed that an irregularity has continued for a
specified time or longer from when the irregular signal is
initially monitored. Passing a certain number, the engine
control unit judges that an irregularity has occurred, memorizesthe malfunction code, and outputs the signal to the
self-diagnosis output terminal.
There are 14 diagnosis items, and the diagnosis results can beread out with a voltmeter.
Moreover, since memorization of the malfunction codes is
backed up directly by the battery, the diagnosis results are
memorized even if the ignition key is turned off. The malfunc-
tion codes will, however, be erased when the battery terminal
or the engine control unit connector is disconnected.
CautionIf the sensor connector is disconnected with the ignition
switch turned on, the malfunction code is memorized. In
this case, disconnect the battery terminal
(-) for 10seconds or more, and the diagnosis memory will be
erased.The 14 diagnosis items are provided as follows, and if plural
items are activated, they are all indicated sequentially from thesmallest code number.
arometnc pressure sensor
CHECK PROCEDURE (SELF-DIAGNOSIS)Precautions for OperationN14PCAE2(1) When battery voltage is low, no detection of failure is
possible. Be sure to check the battery for voltage and otherconditions before starting the test.
(2) Diagnosis item is erased if the battery or the engine controlunit connector is disconnected. Do not disconnect the
battery before the diagnosis result is completely read.
(3) After check and correction are over, disconnect ground
cable for 10 seconds or more from negative terminal of
battery and connect it again to make sure that failure code
is erased.