Mitsubishi Montero (1991+). Manual — part 42
pump. If fuel pressure drops slowly, fuel injector is leaking or fuel
pressure regulator valve seat is leaking. Check for faulty fuel
injector or fuel pressure regulator. Repair as required.
11) When fuel pressure test is complete, repeat fuel pressure
release procedure in steps 1) and 2) before disconnecting fuel
pressure gauge. Install new "O" ring at end of high pressure hose.
Check for fuel leaks.
FUEL PUMP TEST TERMINAL LOCATION TABLE
Application Wire Color Location
Colt, Colt 200 . . . BLK/WHT . . . .. Center Of Firewall
Colt Vista . . . . BLK/WHT . . Right Center Of Firewall
Eclipse . . . . BLK/WHT . . .. Rear Of Battery Compt.
Galant . . . . . YEL/GRN . . ... Left Rear Eng. Compt.
Mirage 1.5L . . . BLK/WHT . . . .. Center Of Firewall
Mirage 1.6L . . . BLK/BLU . . . .. Center Of Firewall
Montero . . . . .. WHT . . .. Right Center Of Firewall
Pickup . . . . . BLK/BLU . ... Right Side Of Eng. Compt.
Precis . . . . ... YEL . . . . Left Rear Eng. Compt.
Summit . . . . . BLK/WHT . . . .. Center Of Firewall
Ram-50 . . . . . BLK/BLU . ... Right Side Of Eng. Compt.
Stealth, 3000GT . . BLK/BLU . . .. Rear Of Battery Compt.
REGULATED FUEL PRESSURE TABLE
At Idle At Idle
w/Vacuum w/o Vacuum
Application psi (kg/cm
) psi (kg/cm
)
Non-Turbo . . . . .. 38 (2.7) . ... 47-50 (3.3-3.5)
Turbo
Except Eclipse A/T . ... 27 (1.9) . ... 36-38 (2.5-2.7)
Eclipse A/T . . . .. 33 (2.3) . ... 36-38 (2.9-3.2)
Control Relay
Multipurpose relay switches power to vehicle sensors and
actuators including airflow sensor, crank angle sensor, idle speed
control, injectors and fuel pump. When ignition switch is turned to ON
position, ECU energizes coils controlling injectors, airflow sensor
and idle speed control. When ignition switch is turned to START
position, ECU energizes coils (through inhibitor switch on A/T models)
to supply power to fuel pump. Relay failure will cause a no-start
condition. For testing procedure, see SYSTEM & COMPONENT TESTING
article.
IGNITION CHECKS
SPARK
Check for spark at coil wire (if applicable) and at each
spark plug wire using a high output spark tester. Check spark plug
wire resistance on suspect wires. For wire resistance specification,
see C - SPECIFICATIONS article in the ENGINE PERFORMANCE Section.
CRANK ANGLE SENSOR
For crank angle sensor testing procedure on all models except
Ram-50, Stealth, Eclipse, Laser, Pickup and 3000GT, see TEST NS-5:
TESTING CRANK ANGLE SENSOR CIRCUIT - G - TESTS W/CODES article in the
ENGINE PERFORMANCE section.
On Eclipse and Laser, see NS-4A: REPAIRING CRANK ANGLE SENSOR
in G - TESTS W/CODES - 1.8L article.
On Ram-50, Stealth, Pickup and 3000GT testing information not
available at time of publication.
DISTRIBUTORLESS IGNITION SYSTEM (DIS)
Ignition Coil Resistance (4-Cyl Vehicles Except Eclipse 2.0L)
1) Using a Digital Volt/Ohmmeter (DVOM), measure primary coil
resistance between ignition coil connector terminals No. 2 and No. 3
(coils for cylinders No. 1 and No. 4) and terminals No. 1 and No. 3
(coils for cylinders No. 2 and No. 3). See Fig. 2.
Fig. 2: Testing Ignition Coil Primary Resistance (4-Cylinder)
Courtesy of Mitsubishi Motor Sales of America.
2) Measure secondary coil resistance between coil towers for
cylinders No. 1 and No. 4 and between coil towers for cylinders No. 2
and No. 3. See Fig. 3. Primary and secondary coil resistance should be
within specification. See DIS IGNITION COIL RESISTANCE table.
Fig. 3: Testing Ignition Coil Secondary Resistance (4-Cylinder)
Courtesy of Mitsubishi Motor Sales of America.
Ignition Coil Resistance (Eclipse 2.0L)
1) Using a DVOM, measure primary coil resistance between
ignition coil connector terminals No. 2 and No. 4 (coils for cylinders
No. 1 and No. 4) and between terminals No. 4 and No. 1 (coils for
cylinders No. 2 and No. 3). See Fig. 2.
2) Measure secondary coil resistance between coil towers for
cylinders No. 1 and No. 4 and between coil towers for cylinders No. 2
and No. 3. See Fig. 3. Primary and secondary coil resistance should be
within specification. See DIS IGNITION COIL RESISTANCE table.
DIS IGNITION COIL RESISTANCE TABLE Ohms @ 68
F (20
C)
Application Primary Secondary
All Models . . ... .77-.95 . . .. 10.3-13.9
Power Transistor (Eclipse)
1) Disconnect power transistor connector. Using an analog
ohmmeter, connect positive ohmmeter lead to terminal No. 7 and
negative lead to terminal No. 3. See Fig. 4. Ensure there is no
continuity.
Fig. 4: Power Transistor Connector ID (Eclipse)
Courtesy of Mitsubishi Motor Sales of America.
2) Using a 1.5-volt dry cell battery, connect positive end of
1.5-volt battery to power transistor terminal No. 6 and negative end
to terminal No. 3. Ohmmeter should now read continuity between power
transistor terminals No. 7 and No. 3.
3) Connect positive end of 1.5-volt battery to power
transistor terminal No. 2 and negative end to terminal No. 3. Connect
positive ohmmeter lead to terminal No. 1 and negative lead to terminal
No. 3. Ohmmeter should read continuity. Replace power transistor if it
does not test as described.
Power Transistor (Colt Vista, Galant, Montero, Pickup &
Ram-50)
1) Disconnect power transistor connectors. Using a DVOM,
connect positive ohmmeter lead to terminal No. 2 and negative lead to
terminal No. 3. See Fig. 5. Ensure there is no continuity.
2) Using a 1.5-volt dry cell battery, connect positive end of
1.5-volt battery to power transistor terminal No. 1 and negative end
to terminal No. 2. DVOM should now read continuity at power transistor
terminals No. 2 and No. 3. Replace power transistor if it does not
test as described. See Fig. 6.
Fig. 5: Power Trans Conn ID (Colt Vista, Galant, Montero, P/U & Ram
50)
Courtesy of Mitsubishi Motor Sales of America.
Fig. 6: Testing Power Trans (Colt Vista, Galant, Montero, Pickup &
Ram-50)
Courtesy of Mitsubishi Motor Sales of America.
Power Transistor (Colt, Colt 200, Mirage & Summit)
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