relay MITSUBISHI MONTERO 1998 Owner's Guide

Fig. 3: Identifying Defogger Relay Terminals (Montero)
Courtesy of Mitsubishi Motor Sales of America
Fig. 4: Identifying Defogger Relay Terminals (3000GT)
Courtesy of Mitsubishi Motor Sales of America
DEFOGGER SWITCH TEST

Fig. 6: Identifying Defogger Switch Terminals (3000GT)
Courtesy of Mitsubishi Motor Sales of America
DEFOGGER TIMER TEST
Montero
Remove defogger timer from interior relay block. Connect test
battery and test light to timer. See Fig. 7. Ensure test light
illuminates for about 11 seconds when battery voltage is applied to
terminal No. 3. Reapply battery voltage to terminal No. 3 and observe
test light. Test light should go off. If timer does not test as
specified, replace timer.
Fig. 7: Identifying Defogger Timer Terminals (Montero)
Courtesy of Mitsubishi Motor Sales of America
GRID TEST

DOOR LOCKS - POWER & KEYLESS ENTRY
1998 Mitsubishi Montero
1998 ACCESSORIES & EQUIPMENT
Mitsubishi - Keyless Entry & Power Door Locks
Montero & 3000GT
DESCRIPTION & OPERATION
On 3000GT, power door locks are controlled by driver or
passenger switches which send signals to Electronic Timer Alarm
Control System (ETACS) ECU. ETACS-ECU sends appropriate signals to
individual door lock actuators through individual relays.
The following features are incorporated in power door lock
systems that have an ETACS-ECU:
* Once locked door is closed, system will unlock door if key
remains in ignition switch.
* Continuous switching between lock and unlock of door will
disable system for about one minute.
On Montero, power door lock actuator receives signal from
individual control relay that is operated by a switch incorporated in
actuator. On all models, all door locks are actuated with operation of
one lock.
Montero and 3000GT offer optional keyless entry system. Use
of a 2-button portable remote control operates door locks within a
range of 13 ft. (4 m). Dome light flashes twice when doors are locked
and illuminates for 3 seconds when doors are unlocked. If, after 30
seconds, door(s) have not been opened when unlocked with keyless entry\
system, doors will relock.
COMPONENT LOCATIONS
COMPONENT LOCATIONS TABLE








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Component Location
ETACS-ECU
3000GT ........................ Behind Left Side Of Dash
Data Link Connector (DLC) ....... Under Left Side Of Dash,
Below Steering Column
Door Lock Actuator ...................... Inside Each Door
Door Lock Relay
Montero ....................... Behind Left Side Of Dash
3000GT
No. 1 ........................ Under Left Side Of Dash
No. 2 ................. Behind Left Rear Quarter Panel
Power Door Lock Control Unit
Montero
W/O RKE .................... Behind Left Side Of Dash,
Behind Speaker
Receiver
3000GT ................. Behind Right Rear Quarter Panel
Remote Keyless Entry (RKE)
Control Unit
Montero ............... Behind Right Rear Quarter Panel
3000GT ................. Behind Left Rear Quarter Panel









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TRANSMITTER PROGRAMMING
NOTE: Transmitter programming should be performed only after
verifying that door lock operates normally using key.
NOTE: Ensure ignition is off when connecting or disconnecting scan
tool.
Using Scan Tool (Montero & 3000GT)
1) Connect scan tool to DLC. Close all doors. Turn ignition
switch to ACC position, then to OFF position. Press desired
transmitter switches (secret code), then press twice within 10 seconds\
to register code.
2) Lock and unlock door once. If there are 2 transmitters,
program the first, then the second transmitter using the same
procedure within one minute. After completing the second programming,
lock and unlock door once.
3) Programming mode is finalized when programming of second
transmitter secret code is complete, one minute after setting secret
code, when scan tool is disconnected, when ignition is turned on or
when any door is opened.
Without Scan Tool (Montero)
1) Move code registration switch on RKE control unit to SET I
position. Press the LOCK or UNLOCK button on transmitter. Move code
registration switch on control unit to FIX position.
2) Confirm that keyless entry system operates normally. If
system does not operate normally, repeat step 1). If 2 transmitters
are used, register code on SET II position on RKE control unit and set
in same manner as the first transmitter.
TROUBLE SHOOTING
POWER DOOR LOCK INOPERATIVE
Operate door lock(s) with ignition switch in OFF position. If\
door lock(s) do not operate, check for following possible causes:
* Burned fuse, circuit breaker or fusible link caused by short
to body ground.
* Wire connector, or pin inside connector, disengaged at any
connector or component in system.
* Defective ETACS-ECU (if equipped).
* Defective door lock switch, relay or actuator.
* Subfreezing weather conditions, mechanical failure, or
corroded or misaligned assemblies.
KEY REMINDER SYSTEM INOPERATIVE (ETACS-ECU CONTROLLED SYSTEM)
With key inserted in ignition switch, lock driver's or
passenger's door and close door. If door locks do not unlock, check
for following possible causes:
* Defective key reminder switch or no input signal to
ETACS-ECU.
* Defective front door switch or no input signal to ETACS-ECU.
* Defective vehicle speed sensor or no input signal to
ETACS-ECU.
INPUT SIGNAL

Continuity should not be present with actuator set to LOCK position.
Left Rear Door (Montero)
1) Access and disconnect harness from left rear door lock
actuator. See DOOR LOCK ACTUATOR R & I under REMOVAL & INSTALLATION.
Set actuator in LOCK position. Connect positive lead of 12-volt power
source to actuator terminal No. 3 (Blue/Red wire). See WIRING DIAGRAMS
. Actuator should move to UNLOCK position when terminal No. 1
(Blue/Black wire) is connected to ground.
2) With actuator set in UNLOCK position, connect positive
lead of 12-volt power source to actuator terminal No. 1 (Blue/Black
wire). See WIRING DIAGRAMS . Actuator should move to LOCK position when
terminal No. 3 (Blue/Red wire) is connected to ground.
Right Rear Door (Montero)
1) Access and disconnect harness from right rear door lock
actuator. See DOOR LOCK ACTUATOR R & I under REMOVAL & INSTALLATION.
Set actuator in LOCK position. Connect positive lead of 12-volt power
source to actuator terminal No. 1 (Blue/Black wire). See
WIRING DIAGRAMS . Actuator should move to UNLOCK position when terminal
No. 3 (Blue/Red wire) is connected to ground.
2) With actuator set in UNLOCK position, connect positive
lead of 12-volt power source to actuator terminal No. 3 (Blue/Red
wire). See WIRING DIAGRAMS . Actuator should move to LOCK position when
terminal No. 1 (Blue/Black wire) is connected to ground.
DOOR LOCK POWER RELAY
1) Remove door lock relay. See COMPONENT LOCATIONS. Check for
continuity between relay terminals No. 1, 3 and 5, and terminals No.
4, 7 and 8. See RELAY TERMINAL IDENTIFICATION table. Continuity should
be present.
2) Apply positive battery voltage to relay terminal No. 7 and
ground to terminals No. 4 and 8. Check for continuity between relay
terminals No. 1 and 2, and terminals No. 2 and 3. See
RELAY TERMINAL IDENTIFICATION table. Continuity should be present.
Replace relay if continuity is not as specified.
RELAY TERMINAL IDENTIFICATION TABLE









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Application & Harness
Terminal No. Wire Color
Montero
1 ........................................... Blue/Green
2 ............................................ Red/White
3 .......................................... Blue/Orange
4 ............................................ Black/Red
5 ................................................ Black
7 ............................................ Red/Black
8 ......................................... Black/Yellow
3000GT (Relays No. 1 & 2)
1 ........................................... Blue/Black
2 ............................................ Red/Black
3 ............................................. Blue/Red
4 .......................................... Brown/White
5 ................................................ Black
7 ............................................ Red/Black
8 ........... Brown/Blue (No. 1) Or Yellow/Black (No. 2)









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DOOR LOCK CYLINDER SWITCH

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

pressure regulator diaphragm opens relief valve, allowing pressure to
bleed off through fuel return line, reducing fuel pressure.
As engine manifold vacuum decreases (open throttle), fuel
pressure regulator diaphragm closes valve, preventing pressure from
bleeding off through fuel return line, increasing fuel pressure.
FUEL CONTROL
Fuel Injectors
Fuel is supplied to engine through electronically pulsed
(timed) injector valves located on fuel rail(s). PCM controls amount\
of fuel metered through injectors based on information received from
sensors.
IDLE SPEED
Air Conditioning (A/C) Relay
When A/C is turned on with engine at idle, PCM signals IAC
motor to increase idle speed. To prevent A/C compressor from switching
on before idle speed has increased, PCM momentarily opens A/C relay
circuit.
Idle Air Control (IAC) Motor
Motor controls pintle-type air valve to regulate volume of
intake air at idle.
During start mode, PCM controls idle intake air volume
according to Engine Coolant Temperature (ECT) sensor input. After
starting, with idle position switch activated (throttle closed), fast
idle speed is controlled by IAC motor and fast idle air control valve
(if equipped).
When idle switch is deactivated (throttle open), IAC motor
moves to a preset position in accordance with ECT sensor input.
PCM signals IAC motor to increase engine RPM in the following
situations: A/T (if applicable) is shifted from Neutral to Drive, A/C
is turned on, or power steering pressure reaches a preset value.
IGNITION SYSTEMS
DIRECT IGNITION SYSTEM (DIS)
Depending on number of cylinders, ignition system is a 2 or
3-coil, distributorless ignition system. On Eclipse (Turbo) and DOHC
V6 engines, Camshaft Position (CMP) sensor is located beside camshaft,\
in front of engine. On all other engines equipped with DIS, CMP sensor
is a separate unit mounted in place of distributor. On DOHC 4-
cylinder, DOHC V6 and 1.8L 4-cylinder engines with California
emissions, Crankshaft Position (CKP) sensor is located beside
crankshaft, in front of engine. PCM determines TDC based on pulse
signals received from sensors and then controls MFI and ignition
timing.
Power Transistors & Ignition Coils
Based on crankshaft position and CMP sensor inputs, PCM
controls timing and directly activates each power transistor to fire
coils. On 4-cylinder engines, power transistor "A" controls primary
current of ignition coil "A" to fire spark plugs on cylinders No. 1
and No. 4 at the same time. Power transistor "B" controls primary
current of ignition coil "B" to fire spark plugs on cylinders No. 2
and No. 3 at the same time. On V6 engines, companion cylinders No. 1
and 4, 2 and 5, and 3 and 6 are fired together.
On all models, although each coil fires 2 plugs at the same
time, ignition takes place in only one cylinder, since the other

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.

Accessory Socket Relay On junction block.
Blower Motor Relay On junction block.
Buzzer Assembly Behind center of dash.

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.