1998 MITSUBISHI MONTERO diagrams electric

usage on specific models, see appropriate wiring diagram in
L - WIRING DIAGRAMS article. For theory and operation on each
output component, refer to system indicated after component.
Data Link Connector (DLC)
See SELF-DIAGNOSTIC SYSTEM .
EGR Control Solenoid Valve
See EXHAUST GAS RECIRCULATION (EGR) CONTROL under EMISSION
SYSTEMS.
Fuel Injectors
See FUEL CONTROL under FUEL SYSTEM.
Fuel Pressure Control Solenoid Valve (Turbo)
See FUEL DELIVERY under FUEL SYSTEM.
Fuel Pressure Regulator
See FUEL DELIVERY under FUEL SYSTEM.
Idle Air Control (IAC) Motor
See IDLE SPEED under FUEL SYSTEM.
Malfunction Indicator Light
See SELF-DIAGNOSTIC SYSTEM .
Power Transistor(s) & Ignition Coils
See IGNITION SYSTEMS .
Purge Control Solenoid Valve
See EVAPORATIVE CONTROL under EMISSION SYSTEMS.
Wastegate Control Solenoid Valve
See TURBOCHARGED ENGINES under AIR INDUCTION SYSTEM.
FUEL SYSTEM
FUEL DELIVERY
Electric fuel pump, located in gas tank, feeds fuel through
in-tank fuel filter, external fuel filter (located in engine
compartment) and fuel injector rail.
Fuel Pump
Fuel pump consists of a motor-driven impeller. Pump has an
internal check valve to maintain system pressure, and a relief valve
to protect fuel pressure circuit. Pump receives voltage supply from
MFI control relay.
Fuel Pressure Control Solenoid Valve (Turbo)
Valve prevents rough idle due to fuel percolation. On engine
restart, if engine coolant or intake air temperature reaches a preset
value, PCM applies voltage to fuel pressure control solenoid valve for
2 minutes after enginerestart. Valve will open, allowing atmospheric
pressure to be applied to fuel pressure regulator diaphragm. This
allows maximum available fuel pressure at injectors, enriching fuel
mixture and maintaining stable idle at high engine temperatures.
Fuel Pressure Regulator
Located on fuel injector rail, this diaphragm-operated relief
valve adjusts fuel pressure according to engine manifold vacuum.
As engine manifold vacuum increases (closed throttle), fuel

F - BASIC TESTING
1998 Mitsubishi Montero
1998 ENGINE PERFORMANCE
Mitsubishi - Basic Diagnostic Procedures
Diamante, Eclipse, Galant, Mirage, Montero, Montero Sport,
3000GT
INTRODUCTION
The following diagnostic steps will help prevent overlooking
a simple problem. This is also where to begin diagnosis for a no-start
condition. The first step in diagnosing any driveability problem is
verifying the customer's complaint with a test drive under the
conditions the problem reportedly occurred.
Before entering self-diagnostics, perform a careful and
complete visual inspection. Most engine control problems result from
mechanical breakdowns, poor electrical connections or
damaged/misrouted vacuum hoses. Before condemning the computerized
system, perform each test listed in this article.
NOTE: Perform all voltage tests with a Digital Volt-Ohmmeter
(DVOM) with a minimum 10-megohm input impedance, unless
stated otherwise in test procedure.
PRELIMINARY INSPECTION & ADJUSTMENTS
VISUAL INSPECTION
Visually inspect all electrical wiring, looking for chafed,
stretched, cut or pinched wiring. Ensure electrical connectors fit
tightly and are not corroded. Ensure vacuum hoses are properly routed
and are not pinched or cut. See M - VACUUM DIAGRAMS article to verify
routing and connections (if necessary). Inspect air induction system
for possible vacuum leaks.
MECHANICAL INSPECTION
Compression
Check engine mechanical condition with a compression gauge,
vacuum gauge, or an engine analyzer. See engine analyzer manual for
specific instructions.
WARNING: DO NOT use ignition switch during compression tests on fuel
injected vehicles. Use a remote starter to crank engine.
Fuel injectors on many models are triggered by ignition
switch during cranking mode, which can create a fire hazard
or contaminate the engine's oiling system.
Check engine compression with engine at normal operating
temperature, all spark plugs removed and throttle wide open. See
COMPRESSION SPECIFICATIONS table.
COMPRESSION SPECIFICATIONS TABLE









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Application (1) Specification
Compression Ratio
1.5L (VIN A) ..................................... 9.0:1
1.8L (VIN C) ..................................... 9.5:1

Removal & Installation
Remove delta cover (trim cover), screws and electrical
connector. Remove mirror assembly. To install, reverse removal
procedure.
WIRING DIAGRAMS
Fig. 9: Power Mirrors System Wiring Diagram (Eclipse)

SEAT ASSEMBLY
Removal & Installation (Functioning Power Seat)
With ignition on, move seat fully rearward. Remove front seat
anchor covers and remove nuts. Move seat fully forward. Remove rear
seat anchor covers and remove bolts. Turn ignition off. Disconnect
electrical harness connectors. Remove seat assembly. To install,
reverse removal procedure.
Removal & Installation (Malfunctioning Power Seat)
1) Removal of seat assembly front or rear mounting bolt is
not possible due to malfunction of slide motor, slide switch or frozen
slide rails. If seat is stuck in forward position, go to next step. If
seat is stuck in rearward position, go to step 3).
2) Remove rear seat anchor covers and mounting bolts. Remove
adjuster screw nut housing mounting bolt. See Fig. 7. Both adjuster
screw nut housings mount to center of slider frame rail. Insert
screwdriver blade between housing nut and rail. Lift and rotate
housing nut. Slide seat back and remove front anchor nuts. Once seat
is repaired, install housing nut bolts.
3) Lift up front seat cushion cover to expose slide motor.
Remove slide motor mounting bolts. If seat assembly cannot be moved
forward, remove slide motor bracket mounting bolts. Move seat forward
and remove rear anchor bolts. Once seat is repaired, install slide
motor bracket mounting bolts.
Fig. 7: Disconnecting Nut Housing (Typical)
Courtesy of Mitsubishi Motor Sales of America
WIRING DIAGRAMS

STARTER
1998 Mitsubishi Montero
1998 STARTING & CHARGING SYSTEMS
Mitsubishi - Starters
Diamante, Eclipse, Galant, Mirage, Montero, Montero Sport,
3000GT
DESCRIPTION & OPERATION
Starter is a conventional 12-volt, 4-pole brush-type motor,
with direct or gear reduction drive. Starter-mounted solenoid shifts
overrunning clutch and pinion into flywheel when starter is energized.
TROUBLE SHOOTING
NOTE: See TROUBLE SHOOTING article in the GENERAL INFORMATION
section.
ON-VEHICLE TESTING
TROUBLE SHOOTING
1) If starter motor does not operate at all:
* Check starter coil.
* Check electrical connections.
* Check clutch pedal position switch (M/T).
* Check starter relay (M/T).
* Check park/neutral position switch (A/T).
2) If starter motor does not stop, check starter magnetic
switch solenoid.
STARTER RELAY
Diamante, Galant & Montero
1) Remove starter relay. See STARTER RELAY LOCATIONS table.
With no power supplied to any relay, continuity should exist between
relay terminals No. 1 and 2. See WIRING DIAGRAMS.
2) Connect a jumper wire from positive battery terminal to
relay terminal No. 1 and another jumper wire from negative battery
terminal to relay terminal No. 2. Continuity should exist between
relay terminals No. 3 and 4. Replace relay as necessary.
Eclipse (A/T With Theft Alarm)
1) Remove starter relay. See STARTER RELAY LOCATIONS table.
With no power supplied to any relay, continuity should exist between
relay terminals No. 1 and 2. See WIRING DIAGRAMS.
2) Connect a jumper wire from positive battery terminal to
relay terminal No. 1 and another jumper wire from negative battery
terminal to relay terminal No. 2. Continuity should exist between
relay terminals No. 3 and 4. Replace relay as necessary.
Eclipse (A/T Without Theft Alarm)
1) Remove starter relay. See STARTER RELAY LOCATIONS table.
With no power supplied to any relay, continuity should exist between
relay terminals No. 1 and 3. See WIRING DIAGRAMS.
2) Connect a jumper wire from positive battery terminal to
relay terminal No. 1 and another jumper wire from negative battery