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When engine is off, fuel vapors are vented into charcoal
canister. When engine is warmed to normal operating temperature and
running at speeds greater than idle, PCM energizes purge control
solenoid valve, allowing vacuum to purge valve.
Canister vapors are then drawn through solenoid valve into
intake manifold for burning. Purge control solenoid valve remains
closed during idle and engine warm-up to reduce HC (hydrocarbons) and
CO (carbon monoxide) emissions.
POSITIVE CRANKCASE VENTILATION (PCV) VALVE
PCV valve operates in closed crankcase ventilation system.
Closed crankcase ventilation system consists of PCV valve, oil
separator, breather and ventilation hoses.
PCV valve is a one-way check valve located in valve cover.
When engine is running, manifold vacuum pulls PCV valve open, allowing
crankcase fumes to enter intake manifold. If engine backfires through
intake manifold, PCV valve closes to prevent crankcase combustion.
SELF-DIAGNOSTIC SYSTEM
NOTE: PCM diagnostic memory is retained by direct power supply
from battery. Memory is not erased by turning off ignition,
but it will be erased if battery or PCM is disconnected.
Self-diagnostic system monitors input and output signals
through the Data Link Connector (DLC). Diagnostic Trouble Codes (DTCs\
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can only be read using a scan tester. For additional information, see
G - TESTS W/CODES article.
Malfunction Indicator Light (MIL)
MIL (CHECK ENGINE light) comes on when ignition is turned on.\
MIL remains on for several seconds after engine has started. If an
abnormal input signal occurs, MIL comes on and code is stored in
memory. If an abnormal input signal returns to normal, PCM turns MIL
off, but code remains stored in memory until it is cleared. If
ignition is turned on again, MIL will not come on until PCM detects
malfunction during system operation.
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ELECTRICAL COMPONENT LOCATOR
1998 Mitsubishi Montero
1998 ELECTRICAL COMPONENT LOCATION
Mitsubishi - Electrical Component Location
Montero
SAFETY PRECAUTION
WARNING: When working on vehicles equipped with Supplemental Restraint
System (SRS), never apply electrical voltage to the system.
This could cause the SRS (air bag) to be deployed.
BUZZERS, RELAYS & TIMERS
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Component Component Location \
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ABS Motor Relay In right rear of engine
compartment, in ABS relay box.
ABS Valve Relay In right rear of engine
compartment, in ABS relay box.
A/C Compressor Relay In engine compartment
relay box.
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Condenser Fan Motor Relay In engine compartment
relay box.
Defogger Relay In passenger compartment
relay box.
Defogger Timer Behind left side of dash.
Door Lock Relay On bracket, behind left side
of dash.
Engine Control Relay Behind right side of dash,
above ECM.
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Fuel Pump Control Relay Behind right side of dash,
above ECM.
Generator Relay In engine compartment
relay box.
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Headlight Relay In engine compartment
relay box.
Headlight Washer Relay On bracket, behind left side
of dash.
Horn Relay Left front of engine
compartment.
Ignition Key Hole Illumination Light
Timer Behind center console.
Intermittent Wiper Relay (Rear Wiper) In passenger compartment
relay box.
Intermittent Wiper Relay (Windshield
Wiper) Built-in to steering column
switch.
Power Window Relay In passenger compartment
relay box.
Starter Relay Behind center console.
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Taillight Relay In engine compartment
relay box.
Turn Signal & Hazard Flasher Unit On bracket, behind left side
of dash.
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CIRCUIT PROTECTION DEVICES
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Component Component Location \
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ABS Relay Box In right rear corner of
engine compartment.
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Engine Compartment Relay Box On left inner fender panel,
behind battery.
Fusible Links In engine compartment
relay box.
Joint Connector (J/C) Behind left side of dash.
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Door Lock Control Unit Behind left side of dash.
ELC 4-Speed Automatic Transmission
Control Module Behind left side of dash.
Engine Control Module (ECM) Behind right kick panel.
Keyless Entry Control Unit Behind right side quarter
panel.
Rear Differential Lock Control Unit Mounted on top of left rear
wheelwell.
SRS Air Bag Control Unit Behind center of dash.
Sun Roof Control Unit On center of roof, behind
sun roof.
Variable Shock Absorber Control Unit Behind left rear wheelwell,
behind quarter panel.
4WD Indicator Control Unit Behind center of dash.
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MOTORS
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Component Component Location \
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Blower Motor Behind right side of dash.
Condenser Fan Motor On left front of engine
compartment.
Fuel Pump In fuel tank.
Headlight Washer Motor Right side of engine
compartment, in washer fluid
reservoir.
Idle Air Control Motor On throttle body.
Motor Antenna Rear of right front wheelwell.
Rear Differential Lock Air Pump On left rear of vehicle.
Rear Washer Motor In rear of cargo area.
Rear Wiper Motor On center of tailgate.
Sun Roof Motor On center of roof, behind
sun roof.
Windshield Washer Motor Bottom of windshield washer
reservoir.
Windshield Wiper Motor On left side of firewall.
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SENDING UNITS & SENSORS
