1998 MITSUBISHI MONTERO battery location

DVOM, check voltage between ECU 22-pin connector terminal No. 35 and
ground. See Figs. 5-6. Battery voltage should exist in 4WD. Go to next
step.
3) If voltage is not as specified, check and repair
connectors and wiring harness between center differential lock
detection switch and ECU. See WIRING DIAGRAMS. Center differential
lock detection switch is located on side of transfer case. See Fig. 9.
If voltage is as specified, check and repair ECU 22-pin connector. If
connector is okay, replace ECU.
Fig. 9: Identifying 4WD Indicator Switch Location
Courtesy of Mitsubishi Motor Sales of America.
NOTE: When checking for short in ECU circuit, remove ECU connector
and ensure 4WD indicator light operates correctly. If 4WD
indicator light operates correctly, replace faulty ECU. If
4WD indicator light does not operate correctly, replace
faulty 4WD indicator control unit.
4) If no indicator lights come on, repair 4WD indicator power
circuit, or check for faulty 4WD indicator control unit. See 4WD
CONTROL UNIT under COMPONENT TESTS. If center differential light comes
on, regardless of position of transfer shift lever, check the
following:

Using a screwdriver, remove pattern select switch from
console. Switch is located at rear of selector lever, to right of
emergency brake handle. Using a DVOM, check continuity between pattern
select switch terminals No. 1 and 2, with switch in HOLD position.
Continuity should exist. With switch in POWER position, check
continuity between terminals No. 1 and 6. Continuity should exist. If
continuity is not as specified, replace switch. See Fig. 12.
Fig. 12: Identifying Pattern Select Switch Terminals
Courtesy of Mitsubishi Motor Sales of America.
SOLENOIDS
For solenoid testing, refer to the appropriate DTC under
DIAGNOSTIC TESTS. To check solenoid operation, apply battery voltage
to appropriate terminal of TCM connector and ground. Ensure operating
sound can be heard when battery voltage is connected. Replace solenoid
if operating sound cannot be heard.
THROTTLE POSITION (TP) SENSOR
For diagnostic and testing information, see appropriate SELF-
DIAGNOSTICS article in ENGINE PERFORMANCE section.
4WD LOW RANGE DETECTION SWITCH
For location and testing information on 4WD low range
detection switch, see appropriate article in AXLE SHAFTS & TRANSFER
CASES.
TCM PIN VOLTAGE CHARTS
Access TCM. See Fig. 1 or 2. Turn ignition on. Using DVOM,

replace ECU.
4) Check harness connectors to junction block and ignition
switch. Repair as necessary. If connectors are okay, check circuit
between ignition switch and junction block, and between fusible link
No. 2 and junction block. See WIRING DIAGRAMS. Repair as necessary.
COMPONENT TESTS
DEFOGGER RELAY TEST
Diamante & Eclipse
1) Remove defogger relay. See COMPONENT LOCATIONS. Ground
relay terminal No. 1, and apply battery voltage to terminal No. 3. See
Fig. 2 . Check relay continuity using ohmmeter.
2) Continuity should exist between terminals No. 2 and 5.
With voltage disconnected, continuity should not exist between
terminals No. 2 and 5. Ensure continuity exists between terminals No.
1 and 3. If continuity is not as specified, replace relay.
Galant, Mirage & Montero Sport
1) Remove defogger relay. See COMPONENT LOCATIONS. Ground
relay terminal No. 3, and apply battery voltage to terminal No. 1. See
Fig. 2 . Check relay continuity using ohmmeter.
2) Continuity should exist between terminals No. 2 and 5.
With voltage disconnected, continuity should not exist between
terminals No. 2and 5. Ensure continuity exists between terminals No. 1
and 3. If continuity is not as specified, replace relay.
Montero
1) Remove defogger relay. See COMPONENT LOCATIONS. Ground
relay terminal No. 3 and apply battery voltage to terminal No. 1. See
Fig. 3 . Check relay continuity using ohmmeter.
2) Continuity should exist between terminals No. 4 and 5.
With voltage disconnected, continuity should not exist between
terminals No. 4and 5. Ensure continuity exists between terminals No. 1
and 3. If continuity is not as specified, replace relay.
3000GT
1) Remove defogger relay. See COMPONENT LOCATIONS. Ground
relay terminal No. 3, and apply battery voltage to terminal No. 5. See
Fig. 4 . Check relay continuity using ohmmeter.
2) Continuity should exist between terminals No. 1 and 2.
With voltage disconnected, continuity should not exist between
terminals No. 1and 2. Ensure continuity exists between terminals No. 3
and 5. If continuity is not as specified, replace relay.
Fig. 2: Identifying Defogger Relay Terminals (Diamante, Eclipse,
Galant, Mirage & Montero Sport)
Courtesy of Mitsubishi Motor Sales of America

1) Start and run engine at 2000 RPM. Ensure battery is fully
charged. Turn defogger switch to ON position. Using a voltmeter, check
voltage at center section of each defogger grid filament.
2) If voltage is about 6 volts, grid filament is okay. If
voltage is about 12 volts, an open is present in negative circuit.
Move probe slowly toward negative terminal to determine location of
open circuit.
3) If voltage is zero volts, an open is present in positive
circuit. Move probe slowly toward positive terminal to determine
location of open circuit. Repair grid as necessary. See
GRID FILAMENT REPAIR under ON-VEHICLE SERVICE.
ON-VEHICLE SERVICE
GRID FILAMENT REPAIR
Clean broken wire tips thoroughly. Place masking tape along
both sides of broken wire. See Fig. 8. Apply Repair Paste (DuPont
4817) to broken section of grid. Remove masking tape after paste has
dried. Wait 24 hours before using defogger.
Fig. 8: Repairing Rear Defogger Grid Element
REMOVAL & INSTALLATION
DEFOGGER SWITCH
Removal & Installation (Diamante)
Defogger switch is integral with A/C system ECU. To remove
A/C ECU, remove center console. Remove audio panel. Remove radio.
Remove A/C ECU. To install, reverse removal procedure.
Removal & Installation (Eclipse)
Remove upper stoppers from glove compartment. Drop down glove
compartment. From glove compartment opening, reach behind center air
outlet assembly and disconnect harness connectors to switches. Release
metal clips from center air outlet assembly. Remove center air outlet.
Remove defogger switch from center air outlet. To install, reverse
removal procedure.
Removal & Installation (Galant)

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

NOTE: Testing information for RKE control unit is not available
from manufacturer at time of publication. See
PIN VOLTAGE TESTS .
NOTE: If after all testing procedures are completed, system is not
functioning properly, replace unit with a known-good keyless
entry control unit and retest.
POWER DOOR LOCK CONTROL UNIT
Montero (W/O Remote Keyless Entry)
1) Remove power door lock control unit. See
COMPONENT LOCATIONS . Apply battery voltage to control unit terminal
No. 8 (Red/Yellow wire). See WIRING DIAGRAMS.
2) Jumper control unit terminals No. 4 (Black wire), No. 5
(Blue/White wire), and No. 7 (Black/Yellow wire) to battery negative\
terminal. Connect an analog voltmeter between ground and terminal No.
3 (Blue/Red wire). Set voltmeter to DC volts.
3) Remove jumper from control unit terminal No. 5 or 7.
Voltmeter needle should deflect.
4) Jumper control unit terminals No. 4 (Black wire) and No. \
5
(Blue/White wire) to ground. Connect voltmeter between ground and
terminal No. 3 (Blue/Red wire). Jumper control unit terminal No. 7
(Black/Yellow wire) to ground. Voltmeter needle should deflect.
5) Jumper control unit terminal No. 4 (Black wire) to ground\
.
Connect voltmeter between ground and control unit terminal No. 3
(Blue/Red wire). Jumper control unit terminal No. 7 (Black/Yellow
wire) to ground. Voltmeter needle should not deflect.
6) Check if voltage is present between battery ground and
control unit terminals No. 2 (Black/Blue wire) and No. 6 (Black/Red
wire). Battery voltage should be present. If circuits do not test as
specified, replace door lock control unit.
BACK DOOR (LIFTGATE) LOCK ACTUATOR
Montero
Access door lock actuator. See DOOR LOCK ACTUATOR R & I under
REMOVAL & INSTALLATION. Disconnect back door actuator harness
connector. Remove actuator if needed. Connect positive lead of 12-volt
power source to actuator connector. Actuator should operate when
negative lead contacts actuator housing. Replace actuator as needed.
PIN VOLTAGE TESTS

delivery pipe, cover fuel hose connection with a rag. Some
residual fuel pressure may still be in system.
FUEL PRESSURE
1) Relieve fuel pressure. See RELIEVING FUEL PRESSURE. On
models with fuel rail service valve, connect fuel pressure gauge to
fuel rail. On models without fuel rail service valve, disconnect high
pressure fuel inlet line at fuel rail. Remove throttle body bracket
(if necessary). Connect fuel pressure gauge with adapter between fuel
rail and high pressure fuel inlet line. See Fig. 1.
Fig. 1: Installing Fuel Pressure Tester (Typical)
Courtesy of Mitsubishi Motor Sales of America
2) On Eclipse 2.0L non-turbo and Montero Sport, use scan tool
to operate fuel pump. On all other models, operate fuel pump by
connecting battery voltage to fuel pump test terminal. See
FUEL PUMP TEST TERMINAL LOCATION table. Ensure no fuel leaks are
present. Disconnect battery voltage from fuel pump test terminal.
FUEL PUMP TEST TERMINAL LOCATION TABLE









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Application Wire Color Location
Diamante .................. Black/Blue ............ (1)
Eclipse (Turbo & 2.4L) .... Black/Blue ............. ( 2)
Galant .................... Black/Blue ............ ( 3)
Mirage .................... Black/Blue ............ ( 1)
Montero ...................... White .............. ( 4)
3000GT .................... Black/Blue ............ ( 6)
( 1) - On firewall, above brake master cylinder.
( 2) - On firewall behind battery.
( 3) - On main wiring harness, near center of firewall.
( 4) - On main wiring harness, near right center of firewall.
( 5) - Near left rear corner of engine compartment, below
cruise control actuator (if equipped).
( 6) - On main wiring harness, near wiper motor on firewall,
behind battery.









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3) Start engine and allow it to idle. Measure fuel pressure
with vacuum hose connected to fuel pressure regulator. Record fuel
pressure reading. See FUEL PUMP PERFORMANCE table. Disconnect and plug
vacuum hose from fuel pressure regulator. Record fuel pressure
reading.
4) Check for fuel pressure in fuel return hose by gently
pinching hose while increasing engine speed. If fuel volume is low,
fuel pressure in return hose will not be felt. Increase engine speed
to 2500-3000 RPM, 2-3 times. Return engine to idle. Fuel pressure
should not drop when engine is returned to idle.
5) Turn ignition off. Ensure fuel pressure reading does not
decrease within 2 minutes. If a decrease is noted, monitor speed of
decrease.
6) If fuel pressure is lower than specification, fuel
pressure drops at idle after increasing engine speed to 2500-3000 RPM,
or no fuel pressure in fuel return hose can be felt, check for clogged
fuel filter, or faulty fuel pressure regulator or fuel pump.
7) If fuel pressure is greater than specification, check for
a faulty fuel pressure regulator or plugged fuel return line. If fuel
pressure does not change when vacuum hose to regulator is connected or
disconnected, check for a leaking or clogged vacuum hose to fuel
pressure regulator or faulty fuel pressure regulator.
8) If fuel pressure decreases suddenly after engine is
stopped, check valve in fuel pump is not seated. Replace fuel 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 necessary.
9) When fuel pressure test is complete, repeat fuel pressure
release procedure before disconnecting fuel pressure gauge. Install
NEW "O" ring at end of high pressure fuel inlet line. Check for fuel
leaks.
FUEL PUMP PERFORMANCE TABLE









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At Idle w/Vacuum At Idle w/o Vacuum
Application psi (kg/cm) psi (kg/cm)
Eclipse 2.0L
Non-Turbo ........... ( 1) ............ 47-50 (3.3-3.5)
Turbo ............. 33 (2.3) ......... 42-45 (3.0-3.5)
3000GT Turbo ........ 34 (2.4) ......... 43-45 (3.0-3.1)
All Other Models .... 38 (2.7) ......... 47-50 (3.3-3.5)
( 1) - Information is not available from manufacturer at time