1998 MITSUBISHI MONTERO fuel filter

Further inspection required.
Canister attaching
hardware broken ........ A ... Require repair or replacement
of hardware.
Canister attaching
hardware loose ......... A ................. Require repair.
Canister attaching
hardware missing ....... C ............ Require replacement.
Canister attaching
hardware not
functioning ............ A ... Require repair or replacement
of hardware.
Center tube collapsed ... A ........ (2) Require replacement.
Further inspection required.
Contaminated ............ A ...... ( 3) Require replacement of
oil and filter.
Dented .................. 2 ........ ( 4) Suggest replacement.
Further inspection required.
Leaking ................. A .. Require repair or replacement.
Maintenance intervals ... 3 ... Suggest replacement to comply
with vehicle's OEM recommended
service intervals.
( 1) - Inspect pressure relief valve.
( 2) - Inspect bypass.
( 3) - Determine cause of contamination, such as engine coolant,
fuel, metal particles, or water when changing oil. Require
repair or replacement.
( 4) - Determine cause, such as broken motor mount.









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ENGINE OIL GASKETS
See ENGINE OIL DRAIN PLUGS AND GASKETS .
ENGINE OIL PRESSURE GAUGES (MECHANICAL)
ENGINE OIL PRESSURE GAUGE (MECHANICAL) INSPECTION








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Condition Code Procedure
Indicates out of range .. B .......... ( 1) Further inspection
required.
Inoperative ............. A .......... ( 2) Further inspection
required.
Leaking ................. A .. Require repair or replacement.
Reads inaccurately ...... 2 .. Suggest repair or replacement.
( 1) - Gauge may indicate problem with contaminated oil, level,
pressure, or temperature, or problem with gauge.
( 2) - Gauge may indicate problem with contaminated oil, level,
pressure, or temperature, or problem with gauge.
Inoperative includes intermittent operation, out of OEM
specification, or out of range. Further inspection
required to determine cause.









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EVAPORATIVE EMISSION (EVAP) CANISTER FILTERS
EVAPORATIVE EMISSION (EVAP) CANISTER FILTER INSPECTION








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Condition Code Procedure

performance ............ A ........... (2) Require repair or
replacement. Further
inspection required.
( 1) - Inoperative includes intermittent operation.
( 2) - Some components may be serviceable; check for accepted
cleaning procedure.









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FUEL FILLER NECKS AND RESTRICTORS
FUEL FILLER NECK AND RESTRICTOR INSPECTION








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Condition Code Procedure
Attaching hardware
broken ................. A ... Require repair or replacement
of hardware.
Attaching hardware
missing ................ C .......... Require replacement of
hardware.
Attaching hardware not
functioning ............ A ... Require repair or replacement
of hardware.
Leaking ................. A .. Require repair or replacement.
Missing ................. C ............ Require replacement.
Restricted .............. 2 .. Suggest repair or replacement.









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FUEL FILTERS
FUEL FILTER INSPECTION








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Condition Code Procedure
Attaching hardware
broken ................. A ... Require repair or replacement
of hardware.
Attaching hardware
missing ................ C .......... Require replacement of
hardware.
Attaching hardware not
functioning ............ A ... Require repair or replacement
of hardware.
Leaking ................. A .. Require repair or replacement.
Maintenance interval .... 3 ... Suggest replacement to comply
with OEM recommended service
interval.
Missing ................. C ............ Require replacement.
Restricted, affecting
performance ............ A ............ Require replacement.
Restricted, not affecting
performance ............ 1 ............ Suggest replacement.
Water-contaminated ...... 2 ............ Suggest replacement.









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FUEL INJECTORS
FUEL INJECTOR INSPECTION








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Condition Code Procedure
Attaching hardware

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

continuity between chassis ground and EGR solenoid connector terminal
No. 2. If continuity does not exist, repair wiring harness as
necessary. If continuity exists, condition required to set DTC is not
present at this time. Go to next step.
12) Test is complete. Intermittent problem may exist. Road
test vehicle (if necessary) and attempt to duplicate conditions that
caused original complaint. Recheck for DTCs. If no DTCs are displayed,
go to INTERMITTENT DTCS .
DTC P0420, P0421 & P0431: CATALYST EFFICIENCY BELOW
THRESHOLD
NOTE: For terminal identification, see TERMINAL IDENTIFICATION. For
circuit and wire color identification, see
L - WIRING DIAGRAMS article.
Specific self-diagnostic test not available from manufacturer
at time of publication. Check catalytic converter and check for
cracked exhaust manifold. Also, see F - BASIC TESTING article.
DTC P0442: EVAPORATIVE (EVAP) EMISSION CONTROL SYSTEM LEAK
DETECTED
NOTE: For terminal identification, see TERMINAL IDENTIFICATION. For
circuit and wire color identification, see
L - WIRING DIAGRAMS article.
1) Remove fuel cap. Push fuel pipe restrictor to operate On-
board Fuel Vent Valve (OFLV). Install and tighten fuel cap. Remove
fuel cap and ensure distance between filler tube and OFLV is 1.1" (28
mm). If distance is as specified, go to next step. If distance is not
as specified, replace fuel tank filler tube assembly. Go to step 24).
2) Disconnect and plug air filter-to-EVAP vent solenoid hose
at air filter. Disconnect intake manifold plenum-to-EVAP purge
solenoid at intake manifold plenum. Install a "T" fitting between
vacuum hose and intake manifold plenum. Connect a hand-held
pressure/vacuum pump to "T" fitting. Go to next step.
CAUTION: DO NOT apply more than 0.57 psi in following step. Applying
more than specified psi can crack fuel tank.
NOTE: Ensure fuel tank is at least 1/4 full. The lower the fuel
level in fuel tank, the longer it takes to pressurize fuel
system.
3) Using scan tool, read Fuel Tank Differential Pressure
(FTDP) sensor (item 73). Using hand-held pressure/vacuum pump, apply\
0.42 psi. If scan tool reading reaches 0.42 psi, go to next step. If
reading does not reach 0.42 psi, go to step 9).
4) Wait 20 seconds and read scan tool. If scan tool reading
increases 0.06 psi or less, go to next step. If scan tool reading
increases more than 0.06 psi, go to step 21).
5) Disconnect EVAP canister purge hose. Connect Purge Flow
Indicator (MB995061) between EVAP canister and disconnected hose. Turn\
engine on and allow it to reach operating temperature. Turn all lights
and accessories off. Place transmission in Park or Neutral. Observe
purge flow indicator while increasing engine RPM several times. If
purge flow indicator reads less than 2.5 SCFH (20 cm(3)/sec), check
EVAP canister purge hose and EVAP canister port for clogging. If hose
and port are okay, check EVAP purge solenoid. See DTC P0443. If
solenoid is okay, replace EVAP canister. Go to step 24).
6) Using scan tool, read Engine Coolant Temperature (ECT)
sensor temperature (item 21). Compare scan tool reading with

temperature gauge reading. If readings are about the same, go to next
step. If readings are not about the same, go to DTC P0115 test.
7) Using a thermometer, check engine compartment ambient
temperature. Using scan tool, read Intake Air Temperature (IAT) sensor\
temperature (item 13). Compare IAT sensor and thermometer readings. If\
readings are not about the same, go to DTC P0110 test. If readings are
about the same, go to next step.
8) Using scan tool, read Power Steering Pressure (PSP) switc\
h
status (item 27). Switch status should read ON when steering wheel is
turned. If switch status is as specified, go to step 24). If switch
status is not as specified, go to DTC P0551 test.
9) Remove fuel cap. Install a fuel tank filler tube adapter
in place of fuel cap. Plug fuel filler tube adapter hose. Disconnect
and plug air filter-to-EVAP vent solenoid hose at air filter.
Disconnect intake manifold plenum-to-EVAP purge solenoid at intake
manifold plenum. Install a "T" fitting between vacuum hose and intake
manifold plenum. Connect hand-held pressure/vacuum pump to "T"
fitting. Go to next step.
CAUTION: DO NOT apply more than 0.57 psi in following step. Applying
more than specified psi can crack fuel tank.
NOTE: Ensure fuel tank is at least 1/4 full. The lower the fuel
level in fuel tank, the longer it takes to pressurize fuel
system.
10) Using scan tool, read Fuel Tank Differential Pressure
(FTDP) sensor (item 73). Using hand-held pressure/vacuum pump, apply\
0.42 psi. If scan tool reading reaches 0.42 psi, replace fuel cap. Go
to step 24). If reading does not reach 0.42 psi, go to next step.
11) Disconnect hand-held pressure/vacuum pump from "T"
fitting. Install an evaporative emission system tester in place of
vacuum held pump and apply 0.49 psi. Wait two minutes. If pressure
drops less than 0.20 psi, go to next step. If pressure drops 0.29 psi
or more, go to step 14).
12) Disconnect EVAP purge solenoid-to-EVAP canister hose at
EVAP canister. Connect hand-held pressure/vacuum pump to hose and
apply 0.9 psi. If pressure is not maintained, check EVAP purge
solenoid for leak. If EVAP purge solenoid is okay, replace hose. Go to
step 24). If pressure is maintained, go to next step.
13) Disconnect EVAP vent solenoid-to-EVAP canister hose at
EVAP canister. Connect hand-held pressure/vacuum pump to hose and
apply 0.9 psi. If pressure is not maintained, check EVAP vent solenoid
for leak. If EVAP vent solenoid is okay, replace hose. Go to step 24).
If pressure is maintained, replace EVAP canister. Go to step 24).
14) Ensure hoses are properly routed and connected. See M -
VACUUM DIAGRAMS article. Install hoses as necessary and go to step
24). If hoses are okay, go to next step.
15) Disconnect OFLV-to-EVAP canister hose at OFLV and EVAP
canister. Plug hose at OFLV end. Connect hand-held pressure/vacuum
pump to hose at EVAP canister end. Apply 0.9 psi. If pressure is not
maintained, replace hose. Go to step 24). If pressure is maintained,
go to next step.
16) Using scan tool, read Fuel Tank Differential Pressure
(FTDP) sensor (item 73). Connect hand-held pressure/vacuum pump to
OFLV. While monitoring scan tool, apply 0.42 psi. If scan tool reading
reaches 0.42 psi, go to next step. If reading does not reach 0.42 psi,
go to step 20).
17) Disconnect OFLV-to-EVAP canister hose at EVAP canister.
Connect hand-held pressure/vacuum pump to hose and apply 0.9 psi. If
pressure is not maintained, go to next step. If pressure is
maintained, go to step 19).
18) Disconnect EVAP purge solenoid-to-EVAP canister hose at

EVAP canister. Connect hand-held pressure/vacuum pump to hose.
Disconnect intake manifold plenum-to-EVAP purge solenoid at intake
manifold plenum. Operate vacuum pump several times to apply vacuum. If
vacuum leaks, replace EVAP canister. Go to step 24). If vacuum does
not leak, repair clog in hose between EVAP canister and EVAP Purge
solenoid. Go to step 24).
19) Disconnect EVAP canister-to-OFLV hose at OFLV. If vacuum
does not leak, repair clog in hose between EVAP canister and OFLV. Go
to step 24). If vacuum leaks, check fuel tank filler tube assembly. If
fuel tank filler tube assembly is okay, repair clog in hose between
OFLV and fuel cut-off valve. Go to step 24).
20) Replace fuel tank filler tube and OFLV-to-fuel cut-off
valve hose. While monitoring scan tool, apply 0.42 psi with hand-held
pressure/vacuum pump. If scan tool reading does not reach 0.42 psi,
replace fuel tank. Go to step 24).
21) Remove fuel cap. Install a fuel tank filler tube adapter
in place of fuel cap. Disconnect and plug air filter-to-EVAP vent
solenoid hose at air filter. Plug fuel filler tube adapter hose.
Disconnect intake manifold plenum-to-EVAP purge solenoid at intake
manifold plenum. Install a "T" fitting between vacuum hose and intake
manifold plenum. Connect hand-held pressure/vacuum pump to "T"
fitting. Go to next step.
CAUTION: DO NOT apply more than 0.57 psi in following step. Applying
more than specified psi can crack fuel tank.
NOTE: Ensure fuel tank is at least 1/4 full. The lower the fuel
level in fuel tank, the longer it takes to pressurize fuel
system.
22) Using scan tool, read Fuel Tank Differential Pressure
(FTDP) sensor (item 73). Using hand-held pressure/vacuum pump, apply\
0.42 psi. If scan tool reading rises 0.06 psi or less, replace fuel
cap. Go to step 24). If reading rises more than 0.06 psi, go to next
step.
23) Disconnect hand-held pressure/vacuum pump from "T"
fitting. Install an evaporative emission system tester in place of
vacuum held pump and apply 0.49 psi. Using an ultrasonic leak
detector, locate and repair leaks. Go to next step.
24) Road test vehicle and attempt to duplicate conditions
that caused original complaint. Recheck for DTCs. If no DTCs are
displayed, test is complete.
DTC P0443: EVAPORATIVE (EVAP) EMISSION CONTROL SYSTEM PURGE
CONTROL VALVE CIRCUIT MALFUNCTION
NOTE: For terminal identification, see TERMINAL IDENTIFICATION. For
circuit and wire color identification, see
L - WIRING DIAGRAMS article.
1) Using scan tool, turn EVAP purge solenoid on and off (item\
08). Listen for clicking sound from EVAP purge solenoid. If no sound
is heard, go to next step. If sound is heard, fault is intermittent.
See INTERMITTENT DTCS .
2) Mark and disconnect vacuum hoses, and wiring connector
from EVAP purge solenoid. Install vacuum pump to EVAP purge solenoid
Black/Red vacuum hose port. Apply vacuum to EVAP purge solenoid. Go to
next step.
3) Apply and remove 12 volts across EVAP purge solenoid
terminals. Vacuum should hold without voltage applied. Vacuum should
leak with voltage applied. If EVAP purge solenoid does not test as
specified, replace EVAP purge solenoid. Go to step 8). If EVAP purge
solenoid tests as specified, go to next step.

tank filler adapter hose. Go to next step.
CAUTION: DO NOT apply more than 1.0 psi in following step. Applying
more than specified psi can crack fuel tank.
NOTE: Ensure fuel tank is at least 1/4 full. The lower the fuel
level in fuel tank, the longer it takes to pressurize fuel
system.
3) Apply 1.0 psi. Using scan tool, read Fuel Tank
Differential Pressure (FTDP) sensor (item 73). If scan tool reads mo\
re
than 0.86 psi, go to next step. If reading is 0.86 psi or less, fault
is intermittent. See INTERMITTENT DTCS.
4) Check On-Board Fuel Vent Valve (OFLV) for clogging. OFLV
is located in fuel tank filler tube assembly. If OFLV is clogged,
replace fuel tank filler tube assembly. Go to step 10). If OFLV is
okay, go to next step.
5) Check EVAP hoses, and purge and vent solenoids for
clogging. Repair or replace as necessary. Go to step 10). If hoses and
solenoids are okay, go to next step.
6) Disconnect FTDP connector. Ensure ignition is off. Using
DVOM, check for continuity between ground and FTDP sensor connector
terminal No. 2. If continuity does not exist, repair wiring harness as
necessary. If continuity exists, go to next step.
7) Disconnect PCM connector. Ground PCM connector terminal
No. 93. Using DVOM, check for continuity between chassis ground and
FTDP sensor connector terminal No. 1. If continuity does not exist,
repair wiring harness as necessary. If continuity exists, go to next
step.
8) Turn ignition on. Using DVOM, check voltage between ground
and FTDP sensor connector terminal No. 3. Voltage should be 4.8-5.2
volts. If voltage is not as specified, replace PCM. If voltage is as
specified, go to next step.
9) Inspect connectors and wiring harness between FTDP sensor
and PCM. Repair as necessary. If connectors and wiring harness are
okay, go to next step.
10) Road test vehicle and attempt to duplicate conditions
that caused original complaint. Recheck for DTCs. If no DTCs are
displayed, test is complete.
DTC P0455: EVAPORATIVE EMISSION (EVAP) CONTROL SYSTEM LARGE
LEAK DETECTED
NOTE: For terminal identification, see TERMINAL IDENTIFICATION. For
circuit and wire color identification, see
L - WIRING DIAGRAMS article.
1) Remove fuel cap. Push fuel pipe restrictor to operate On-
board Fuel Vent Valve (OFLV). Install and tighten fuel cap. Remove
fuel cap and ensure distance between filler tube and OFLV is 1.1" (28
mm). If distance is as specified, go to next step. If distance is not
as specified, replace fuel tank filler tube assembly. Go to step 20).
2) Disconnect and plug air filter-to-EVAP vent solenoid hose
at air filter. Disconnect intake manifold plenum-to-EVAP purge
solenoid at intake manifold plenum. Install a "T" fitting between
vacuum hose and intake manifold plenum. Connect a hand-held
pressure/vacuum pump to "T" fitting. Go to next step.
CAUTION: DO NOT apply more than 0.57 psi in following step. Applying
more than specified psi can crack fuel tank.
NOTE: Ensure fuel tank is at least 1/4 full. The lower the fuel
level in fuel tank, the longer it takes to pressurize fuel

system.
3) Using scan tool, read Fuel Tank Differential Pressure
(FTDP) sensor (item 73). Using hand-held pressure/vacuum pump, apply\
0.42 psi. If scan tool reading reaches 0.42 psi, go to next step. If
reading does not reach 0.42 psi, go to step 8).
4) Disconnect EVAP canister purge hose. Connect Purge Flow
Indicator (MB995061) between EVAP canister and disconnected hose. Turn\
engine on and allow it to reach operating temperature. Turn all lights
and accessories off. Place transmission in Park or Neutral. Observe
purge flow indicator while increasing engine RPM several times. If
purge flow indicator reads less than 2.5 SCFH (20 cm(3)/sec), check
EVAP canister purge hose and EVAP canister port for clogging. If hose
and port are okay, check EVAP purge solenoid. See DTC P0443. If
solenoid is okay, replace EVAP canister. Go to step 20).
5) Using scan tool, read Engine Coolant Temperature (ECT)
sensor temperature (item 21). Compare scan tool reading with
temperature gauge reading. If readings are about the same, go to next
step. If readings are not about the same, go to DTC P0115 test.
6) Using a thermometer, check engine compartment ambient
temperature. Using scan tool, read Intake Air Temperature (IAT) sensor\
temperature (item 13). Compare IAT sensor and thermometer readings. If\
readings are not about the same, go to DTC P0110 test. If readings are
about the same, go to next step.
7) Using scan tool, read Power Steering Pressure (PSP) switc\
h
status (item 27). Switch status should read ON when steering wheel is
turned. If switch status is as specified, go to step 20). If switch
status is not as specified, go to DTC P0551 test.
8) Remove fuel cap. Install a fuel tank filler tube adapter
in place of fuel cap. Plug fuel filler tube adapter hose. Disconnect
and plug air filter-to-EVAP vent solenoid hose at air filter.
Disconnect intake manifold plenum-to-EVAP purge solenoid at intake
manifold plenum. Install a "T" fitting between vacuum hose and intake
manifold plenum. Connect hand-held pressure/vacuum pump to "T"
fitting. Go to next step.
CAUTION: DO NOT apply more than 0.57 psi in following step. Applying
more than specified psi can crack fuel tank.
NOTE: Ensure fuel tank is at least 1/4 full. The lower the fuel
level in fuel tank, the longer it takes to pressurize fuel
system.
9) Using scan tool, read Fuel Tank Differential Pressure
(FTDP) sensor (item 73). Using hand-held pressure/vacuum pump, apply\
0.42 psi. If scan tool reading reaches 0.42 psi, replace fuel cap. Go
to step 20). If reading does not reach 0.42 psi, go to next step.
10) Disconnect hand-held pressure/vacuum pump from "T"
fitting. Install an evaporative emission system tester in place of
vacuum held pump and apply 0.49 psi. Wait two minutes. If pressure
drops less than 0.20 psi, go to next step. If pressure drops 0.29 psi
or more, go to step 13).
11) Disconnect EVAP purge solenoid-to-EVAP canister hose at
EVAP canister. Connect hand-held pressure/vacuum pump to hose and
apply 0.9 psi. If pressure is not maintained, check EVAP purge
solenoid for leak. If EVAP purge solenoid is okay, replace hose. Go to
step 24). If pressure is maintained, go to next step.
12) Disconnect EVAP vent solenoid-to-EVAP canister hose at
EVAP canister. Connect hand-held pressure/vacuum pump to hose and
apply 0.9 psi. If pressure is not maintained, check EVAP vent solenoid
for leak. If EVAP vent solenoid is okay, replace hose. Go to step 20).
If pressure is maintained, replace EVAP canister. Go to step 24).
13) Ensure hoses are properly routed and connected. See M -