1991 MITSUBISHI ECLIPSE relay

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.

FUEL SYSTEM - MPI Svstem InsDection <2.0L DOHC Engine>
outputDiagnosis codeIreferenceDragnosrs ItemCheck item (Remedy)orderOutput signal patternNo.Memory
7Crank angle sensor
:nn **
Retainedl Harness and connector
(If harness and connector
are normal, replace crank
angle sensor assembly.)
12A0107
8Top dead center
:- 23
Retainedl Harness and connectorsensor (No.1 and(If harness and connector
No. 4 cylinder)are normal, replace crank
angle sensor assembly.)
12A0107
9Vehicle speed sensor24Retainedl Harness and connector
(reed swatch)H
I u I nlvln
l Vehicle speed sensor
(reed switch)
L12A0107
10Barometnc pressure25Retainedl Harness and connector
sensorH(If harness and connector
are normal, replace
LULllnMllbarometric pressure
12A0107sensor assembly.)
11Detonation sensorRetainedl Harness and connector
:m 31
l Detonation sensor
12R0468
12Injector
:m 41
Retainedl Harness and connector0 Injector coil resistance
12A0105
13Fuel pump42Retainedl Harness and connectorH
UUUI nn
0 Control relay
L12A0105
14EGR 43Retainedl Harness and connector
Hl EGR temperature sensor
u u u I nnn
l EGRvalvel EGR valve control sole-Lnoid valve
12A0105l EGR valve control vacuum
15Ignition coil44Retainedl Harness and connectorH
UUUL-llMlL
0 Ignition coil0 Power transistor
L12A0105
16Normal state---H
L
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.

_-
FUEL SYSTEM - MPI System Inspection <2.0L DOHC Engine>'I4181
OlLO22Z
CONTROL RELAY
INSPECTIONNWWAC
(1) Remove the control relay.
(2) Use jumper wires and connect control relay terminal
@I to
the battery
@ terminal and terminal @ to the battery 0
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.
(3) With battery
0 terminal jumper wire connected and
disconnected, measure the voltage at control relay termi-
nals
@I and 0.(4) Use jumper wires to connect control relay terminal
@ to
the battery
@ terminal and terminal @ to the battery 0
terminal.(5) With the battery
@ terminal jumper wire connected and
disconnected, measure the voltage at control relay termi-
nals
@I and 0.
Continuity between terminals 0-0
)(6) Use jumper wires and connect control relay terminal
@ to
the battery
@ terminal and terminal @ to the battery 0
terminal.(7) With the battery
0 terminal jumper wire disconnected,
measure the voltage at control relay terminal
0.
31(8) Replace the control relay if faulty.

14-82FUEL SYSTEM - MPI System Inspection <2.0L DOHC Engine>
\ \\I \3FUO352
,\ \
\I \3FUO353
,\ ‘\R/
\ \\I \3FUo354
POWER TRANSISTORRefer to GROUP 8
- Ignition System
NlIAcQAl
a-4
AIR CONDITIONER POWER RELAYN14NCl.a -Refer to GROUP 24
- Air Conditioner.
PURGE CONTROL SOLENOID VALVEN14RCKARefer to GROUP 25
- Evaporative Emission Control System.
EGR CONTROL SOLENOID VALVE
N14NCURefer to GROUP 25
- Exhaust Gas Recirculation System.
FUEL PRESSURE CONTROL VALVE
OPERATIONAL CHECK
NOTEBefore the vacuum hoses are removed, make a mark’on the
-
hose for visual identification so that they can be reconnected in,their original positions.
(1) Remove the vacuum hoses (blue stripes and black) from
the solenoid valve.
(2) Disconnect the harness connector.
(3) Apply vacuum with a hand vacuum pump to the nipple to
which the black vacuum hose was connected and check for
air tightness both when a voltage is applied to the solenoidvalve terminal and when the voltage is removed.
Battery voltageOther nipple of
solenoid valveNormal condition
When voltage
is removed
When voltage
is applied
OpenVacuum leaks
Blocked by fingerVacuum is retained
OpenVacuum is retainedCHECKING
COIL RESISTANCE
Measure the coil resistance with a tester.
Standard resistance: 36
- 46 R [at 20°C (68”F)]

i-._AUTO-CRUISE CONTROL SYSTEM
- Troubltyshootf$6. CHECKING THE STOP LIGHT SWITCH CIRCUIT
Sub fusible link @
vacuum
w-vStop light
Auto-cruisecontrol unit13A0366Description of operation
When the brake pedal is depressed during constant-speedtravel, the stop light switch’s (NC) contacts for the cruise-control system open, with the result that the current to the
auto-cruise vacuum pump is interrupted, thus canceling the
constant-speed travel.
At the same time, moreover, the closing of the (NO) contacts
for the stop light results in the sending of the cancel signal to
the control unit, so that the auto-cruise vacuum pump current is
discontinued within the control unit, thereby canceling the
constant-speed travel.
The flow of current is from the sub fusible link
@I to fuse No. @
of the junction block, the stop light switch, and the control unit.Troubleshooting hint
ECU terminal voltage
TerminalSignal
No.
15
t-i-
Stop light
switch (load
side)pedal is depressed.
NOTENC: Indicates ON at all times. (For cruise contra!)NO: Indicates OFF at all times. (For stop light)l,_7. CHECKING THE INHIBITOR SWITCH CIRCUIT
Auto-
cruise
controlunit
Vehicles with x
theft-alarmIVehicles without5 theft-alarm systemsystem br
*Theft-’ nI Ialarm, ._I
starterz
relayQlOF: N A_ 3
Inhibitor
switchDescription of operation
The inhibitor switch also functions as the switch for the starter.If the selector lever is moved to the “N” position during
constant-speed travel, current flows to the control unit, inhibitorswitch, theft-alarm starter relay (vehicles with theft-alarm
system), starter motor, and to ground; the cancel signal istherefore input to the control unit, thus canceling the constant-speed travel.5Troubleshooting hint
ECU terminal voltage
TeE!alSignalConditionsTerminalvoltage
1Inhibitor switchAt all timesSystemvoltage
C.starter
motor13A036BNOTERefer to GROUP 8-Theft-alarm System forthe + (asterisk) on“Theft-alarm System”.

AUTOMATIC TRANSAXLE - Troubleshooting214%3
TRANSAXLE CONTROL UNIT
-‘” .The 42 pin connector is for increased sensor input. Terminal
layout for the 42 pin connector is as shown below.TFA0360
101.Damper clutch control solenoid valve
102.Shift control solenoid valve A
103.Oil temperature warning light 104. Power supply
105. Ground
106.Pressure control solenoid valve
107.Shift control solenoid valve B108.
-
109. Power supply
110. Ground
1. GroundL.
-
3.Accelerator switch
4.-5. Diagnosis output terminal
6. Air conditioner relay signal
7.-8. Diagnosis control terminal
9.-
IO. Power supply (Backup)
11. Kickdown servo switch
12.-
13.-14. Oil temperature sensor
15.High oil temperature sensor
16. Throttle position sensor
17.Sensor ground18. Vehicle speed reed switch
51. Inhibitor switch (PI52. Inhibitor switch
(8)53. Inhibitor switch
(N)54. Inhibitor switch
(D)
55. Inhibitor switch (2)56. inhibitor switch
(L)
57.Overdrive switch
58. Pulse generator
B59. Pulse generator
B60. Pulse generator A
61. Pulse generator A
62.Ground63.Ignition pulse64. Power mode signal

21-202AUTOMATIC TRANSAXLE - Troubleshooting
CONVERTER STALL TESTStall test consist of determining maximum engine
speed obtained at full throttle in “D” and “R”
positions. This test checks torque converter stator
overrunning clutch operation, and holding ability of
transaxle clutches and low-reserve brake.
CautionDuring this test, make sure that no one stand in
front of or behind vehicle.
1. Check transaxle fluid level. Fluid should be at
normal operating temperature
[70-80°C (160-
18O”F)]. Engine coolant should also be at normaloperating temperature
[80-90°C (180- 19O”F)l.2. Apply chocks to both rear wheels.
3. Attach engine tachometer.
4. Apply parking and service brakes fully.
5. Start engine.
6. With selector lever in “D” position, depress
accelerator pedal fully to read engine maximum
rpm. Do not hold throttle wide open any longer
than is necessary to obtain maximum engine
rpm reading, and never longer than 5 seconds ata time. If more than one stall test is required,
operate engine at approximatey 1,000 rpm in
neutral for 2 minutes to cool transaxle fluid
between tests.
Stall speed:
1,800-3,200 rpm
TRANSAXLE CONTROL7. Place selector lever to “R” position and perform
?+stall test by the same procedure as in foregoing
-,
item.Stall Speed Above Specification in “D”
If stall speed is higher than specification, rear clutchor overrunning clutch of transaxle is slipping. In this
case, perform hydraulic test to locate cause of
slippage.Stall Speed Above Specifjcation in “R”
If stall speed is higher than specification, front
clutch of transaxle or low-reverse brake is slipping.
In this case, perform hydraulic test to locate cause
of slippage.
Stall Speed Below Specification in “D” and “R”
If stall speed is lower than specification, insufficient
engine output or faulty torque converter is sus-
pected. Check for engine misfiring, ignition timing,
valve clearance etc. If these are good, torque
converter is faulty.
Symptom
Selector lever operation isstiff
Probable causeIncorrect adjustment of sleeve
Incorrect adjustment of control cable
Excessive wear of detent plate
Worn contact surfaces of pushbutton and sleeveRemedyAdjust
Replace
Starter motor does notoperate with the selector
lever in the “N” or
“P”position
Will not shift to
4-speedMalfunction in inhibitor switch
Malfunction of starter relay
Incorrect adjustment of control cableMalfunction of OD switch
Replace
Adjust
Replace