1998 MITSUBISHI MONTERO battery
[x] Cancel search: batteryPage 746 of 1501
special patterns probe to VAF sensor connector terminal No. 3 or to
PCM connector terminal No. 61.
2) Start engine. Verify waveform high frequency and low
frequency patterns are of about the same length (time). Verify
wavelength decreases and frequency increases as engine RPM increases.
If conditions are not as specified, replace VAF sensor. If conditions
are as specified, go to step 4).
3) Warm vehicle to normal operating temperature. Ensure
headlights and accessories are off. Using scan tool, read VAF sensor
frequency value (item 12). See VOLUME AIRFLOW SENSOR VALUES table.
Frequency should increase when engine is raced. If values are not as
specified, replace VAF sensor. If values are as specified, turn
ignition switch to off position and disconnect VAF sensor connector.
Go to next step.
VOLUME AIRFLOW SENSOR VALUES TABLE
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Application Hz @ 700 RPM Hz @ 2500 RPM
Montero ................. 25-51 ................. 80-120
3000GT
DOHC
Non-Turbo ........... 24-50 ................. 71-111
Turbo ............... 26-52 ................. 93-133
SOHC .................. 21-47 .................. 57-97
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4) On 3000GT, go to next step. On Montero, disconnect MFI
relay connector. Using DVOM, check for continuity between VAF sensor
connector terminal No. 4 and MFI relay connector terminal No. 1. If
continuity does not exist, repair wiring harness as necessary. If
continuity exists, go to next step.
5) Using DVOM, check for continuity between chassis ground
and VAF sensor connector terminal No. 5. If continuity does not exist,
repair wiring harness as necessary. If continuity exists, go to next
step.
6) Ensure ignition switch is in OFF position. Disconnect PCM
connector. Ground PCM connector terminal No. 19. Using DVOM, check for
continuity between chassis ground and VAF sensor connector terminal
No. 7. If continuity does not exist, repair wiring harness as
necessary. If continuity exists, go to next step.
7) On 3000GT, go to next step. On Montero, ground PCM
connector terminal No. 61. Using DVOM, check for continuity between
chassis ground and VAF sensor connector terminal No. 3. If continuity
does not exist, repair wiring harness as necessary. If continuity
exists, turn ignition switch to ON position and go to step 9).
8) Turn ignition switch to ON position. Using DVOM, check
voltage between chassis ground and VAF sensor connector terminal No.
4. If battery voltage does not exist, repair wiring harness as
necessary. If battery voltage exists, go to next step.
9) Using DVOM, check voltage between chassis ground and VAF
sensor connector terminal No. 3. If voltage is not 4.8-5.2 volts,
replace PCM. If voltage is as specified, condition required to set DTC
is not present at this time. Go to next step.
10) 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 P0105: BAROMETRIC (BARO) PRESSURE SENSOR CIRCUIT FAILURE
NOTE: BARO pressure sensor is built into Volume Airflow (VAF)
sensor. For DTC P0105 test purposes, VAF sensor will be
Page 751 of 1501
Front
Left ........................................................ 39
Right ....................................................... 11
Rear
Left ........................................................ 69
Right ....................................................... 59
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4) While monitoring scan tool, accelerate to 2500 RPM and
decelerate to 700 RPM (idle). Scan tool should switch from 0.6-1.0
volt to 0.4 volt or less. If voltage is not as specified, replace
HO2S. If voltage is as specified, go to next step.
5) On 3000GT, go to next step. On Montero, disconnect HO2S
connector and MFI relay connector. Using DVOM, check for continuity
between HO2S connector terminal No. 1 and MFI relay connector terminal
No. 1. If continuity does not exist, repair wiring harness as
necessary. If continuity exists, go to step 7).
6) Disconnect HO2S connector. Turn ignition switch to ON
position. Using DVOM, check voltage between chassis ground and HO2S
connector terminal No. 1. If battery voltage does not exists, repair
wiring harness as necessary. If battery voltage exists, go to next
step.
7) Turn ignition switch to OFF position. With HO2S connector
disconnected, disconnect PCM connector. Using DVOM, check for open or
short circuit between specified HO2S connector terminal and PCM
connector terminal. See
FRONT HO2S-TO-PCM HARNESS TERMINAL IDENTIFICATION table. If open or
short circuit exists, repair wiring harness as necessary. If open or
short circuit does not exist, go to next step.
FRONT HO2S-TO-PCM HARNESS TERMINAL IDENTIFICATION TABLE
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Application HO2S Terminal No. PCM Terminal No.
Montero - Federal .......... 3 ....................... 3
4 ...................... 71
All Others .............. ( 1) 3 ...................... 3
( 2) 3 ...................... 4
( 1) 4 ..................... 71
( 2) 4 ..................... 72
( 1) - Left front HO2S.
( 2) - Right front HO2S.
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8) Using DVOM, check for continuity between chassis ground
and HO2S connector terminal No. 2. If continuity does not exist,
repair wiring harness as necessary. If continuity exists, go to next
step.
9) Condition required to set DTC is not present at this time.
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 P0136, P0141, P0156 & P0161: REAR HEATED OXYGEN SENSOR
(HO2S) CIRCUIT FAILURE
NOTE: For terminal identification, see TERMINAL IDENTIFICATION. For
circuit and wire color identification, see
L - WIRING DIAGRAMS article.
1) If using scan tool, go to next step. Disconnect rear HO2S
Page 755 of 1501
injectors are shut off. If idle state does not change, check fuel
injector connection, spark plug and cable, and cylinder compression.
If conditions are not as specified in preceding steps, go to next
step.
6) On 3000GT, go to next step. On Montero, disconnect MFI
relay connector and fuel injector connector at faulty fuel injector.
Using DVOM, check for continuity between MFI relay connector terminal
No. 1 fuel injector intermediate connector terminal No. 8. If
continuity does not exist, repair wiring harness as necessary. If
continuity exists, go to step 9).
7) Disconnect fuel injector connector. Using DVOM, check
voltage between chassis ground and fuel injector connector terminal
No. 1. If battery voltage does not exist, repair wiring harness as
necessary. If battery voltage exists, go to next step.
8) Ground specified PCM connector terminal for appropriate
fuel injector. See INJECTOR-TO-PCM CIRCUIT IDENTIFICATION (3000GT)
table. Using DVOM, check for continuity between chassis ground and
terminal No. 2 of each fuel injector connector. If continuity does not
exist, repair appropriate circuit as necessary. If continuity exists,
condition required to set DTC is not present at this time. Go to step
10).
INJECTOR-TO-PCM CIRCUIT IDENTIFICATION (3000GT) TABLE
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Injector No. PCM Terminal No.
1 ...................................................... 1
2 ..................................................... 14
3 ...................................................... 2
4 ..................................................... 15
5 ...................................................... 3
6 ..................................................... 16
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9) Ground specified PCM connector terminal. See
INJECTOR-TO-PCM CIRCUIT IDENTIFICATION (MONTERO) table. Using DVOM,
check for continuity between chassis ground and specified fuel
injector connector terminal. If continuity does not exist, repair
appropriate circuit as necessary. If continuity exists, condition
required to set DTC is not present at this time. Go to next step.
INJECTOR-TO-PCM CIRCUIT IDENTIFICATION (MONTERO) TABLE
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Injector Injector Connector PCM
No. Terminal No. Terminal No.
1 ......................... 3 ........................ 1
2 ......................... 2 ....................... 14
3 ......................... 1 ........................ 2
4 ......................... 7 ....................... 15
5 ......................... 6 ........................ 3
6 ......................... 5 ....................... 16
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10) 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 P0300-P0306: CYLINDER MISFIRE DETECTED
NOTE: For terminal identification, see TERMINAL IDENTIFICATION. For
circuit and wire color identification, see
Page 757 of 1501
3) Connect an engine tachometer. Crank engine. Ensure
ignition coil primary current toggles on and off. Using scan tool,
read engine cranking speed (item 22). Compare tachometer and scan tool\
RPM display. Go to next step.
4) If engine fails to start and tachometer reads zero RPM
when engine is cranked, check for broken timing belt or faulty CKP
sensor. If CKP sensor is suspected, substitute known-good CKP sensor.
Repeat test procedure. If engine fails to start, tachometer reads zero
RPM, and ignition coil primary current fails to toggle on and off,
check for faulty ignition coil, ignition circuit or power transistor.
If engine starts and readouts agree, go to next step.
5) Ensure A/C switch is in ON position to activate closed
throttle position switch. Allow engine to idle. Using scan tool, check
engine coolant temperature and read idle speed. See
IDLE RPM SPECIFICATIONS table. If RPM is not to specification, check
for faulty ECT sensor, basic idle speed adjustment, or idle air
control motor. If RPM is within specifications, go to next step.
IDLE RPM SPECIFICATIONS TABLE
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Engine Coolant Temperature Engine RPM
-4
F (-20C)
Montero ...................................... 1300-1500
3000GT
Non-Turbo .................................. 1275-1475
Turbo ...................................... 1300-1500
32
F (0C)
Montero ...................................... 1300-1500
3000GT
Non-Turbo .................................. 1225-1425
Turbo ...................................... 1300-1500
68
F (20C)
Montero ...................................... 1300-1500
3000GT
Non-Turbo .................................. 1100-1300
Turbo ...................................... 1300-1500
104
F (40C)
Montero ...................................... 1040-1240
3000GT
Non-Turbo ................................... 950-1150
Turbo ...................................... 1050-1250
176
F (80C)
Montero & 3000GT ............................... 600-800
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6) On 3000GT, go to next step. On Montero, disconnect CKP
sensor connector and MFI relay connector. Using DVOM, check for
continuity between CKP sensor connector terminal No. 3 and MFI relay
connector terminal No. 1. If continuity does not exist, repair wiring
harness as necessary. If continuity exists, go to next step.
7) With CKP sensor connector disconnected, check for
continuity between chassis ground and CKP sensor connector terminal
No. 1 on Montero or No. 2 on 3000GT. If continuity does not exist,
repair wiring harness as necessary. If continuity exists on 3000GT, go
to next step. On Montero, go to step 9).
8) Check for voltage between chassis ground and CKP sensor
connector terminal No. 3. If battery voltage does not exist, repair
wiring harness as necessary. If battery voltage exists, go to step
10).
9) Turn ignition switch to OFF position. With CKP sensor
connector disconnected, disconnect PCM connector. Check for continuity
Page 758 of 1501
between CKP sensor connector terminal No. 2 and PCM connector terminal
No. 43. If continuity does not exist, repair wiring harness as
necessary. If continuity exists, go to next step.
10) With ignition switch in ON position, check for voltage
between chassis ground and CKP sensor connector terminal No. 2. If 4.
8-5.2 volts do not exist, replace PCM. If voltage is to specification
and CKP sensor is suspected, go to next step.
11) 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 P0340: CAMSHAFT POSITION (CMP) SENSOR CIRCUIT FAILURE
NOTE: For terminal identification, see TERMINAL IDENTIFICATION. For
circuit and wire color identification, see
L - WIRING DIAGRAMS article.
NOTE: Procedures are provided by manufacturer for component
testing using an engine analyzer with oscilloscope
capability. Refer to manufacturer's operation manual for
instructions in use of oscilloscope.
1) If using scan tool, go to step 3). Disconnect CMP sensor
connector. Install Test Harness (MB991348) between CMP sensor and
connector. Using engine analyzer with oscilloscope capability, connect
special patterns probe to CMP sensor connector terminal No. 2. Go to
next step.
2) Start engine. Compare oscilloscope wave pattern with
known-good wave pattern. See Fig. 39. Verify wavelength (time)
decreases as engine RPM increases. If wave pattern fluctuates to left
or right, check for loose timing belt or an abnormality in sensor
pick-up disc. If a rectangular wave pattern is generated even when
engine is not started, substitute known-good CMP sensor. Repeat test.
If wave pattern is still abnormal, go to next step.
Fig. 39: Identifying Known-Good CMP Sensor Wave Pattern
Courtesy of Mitsubishi Motor Sales of America
3) On Montero, go to next step. On 3000GT, disconnect CMP
sensor connector. Turn ignition switch to ON position. Check voltage
between chassis ground and CMP sensor connector terminal No. 3. If
battery voltage does not exist, repair wiring harness as necessary. If
battery voltage exists, go to step 5).
4) Disconnect CMP sensor connector and MFI relay connector.
Using DVOM, check for continuity between CMP sensor connector terminal
No. 3 and MFI relay connector terminal No. 1. If continuity does not
exist, repair wiring harness as necessary. If continuity exists, go to
next step.
5) Check for continuity between chassis ground and CMP sensor
connector terminal No. 4 on 3000GT equipped with DOHC engine or 1 on
Page 759 of 1501
all other models. If continuity does not exist, repair wiring harness
as necessary. If continuity exists, on Montero, go to next step. On
3000GT, go to step 7).
6) Turn ignition switch to OFF position. With CMP sensor
connector disconnected, disconnect PCM connector. Check for continuity
between PCM connector terminal No. 50 and CMP sensor connector
terminal No. 2. If continuity does not exist, repair wiring harness as
necessary. If continuity exists, go to next step.
7) Turn ignition switch to ON position, check voltage between
chassis ground and CMP sensor connector terminal No. 2. If voltage is
not 4.8-5.2 volts, replace PCM. If voltage is as specified, condition
required to set DTC is not present at this time. Go to next step.
8) 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 P0400 & P0403: EXHAUST GAS RECIRCULATION (EGR) VALVE
SYSTEM FAILURE
NOTE: For terminal identification, see TERMINAL IDENTIFICATION. For
circuit and wire color identification, see
L - WIRING DIAGRAMS article.
1) If using scan tool, go to step 8). Remove EGR valve.
Inspect valve for sticking or carbon deposits. Clean or replace EGR
valve as necessary. If EGR valve is okay, go to next step.
2) Connect a vacuum pump to EGR valve. Apply 19.7-19.8 in. Hg
of vacuum. If vacuum does not hold, replace EGR valve. If vacuum
holds, go to next step.
3) Apply 1.2-1.8 in. Hg to EGR valve. Blow air through one
side of EGR valve passage. If air blows through, replace EGR valve. If
air does not blow through, go to next step.
4) Apply 9.1 in. Hg to EGR valve. Blow air through one side
of EGR valve passage. If air does not blow through, replace EGR valve.
If air blows through, reinstall EGR valve and go to next step.
5) Mark and disconnect striped vacuum hoses and wiring
connector from EGR solenoid. Install vacuum pump to EGR solenoid
white-striped vacuum hose port on turbo, or Green-striped vacuum hose
port on all other models. Apply vacuum to EGR solenoid. Go to next
step.
6) Apply and remove 12 volts across EGR solenoid terminals.
Vacuum should hold with voltage applied. Vacuum should leak without
voltage applied. If EGR solenoid does not test as specified, replace
solenoid. If solenoid tests as specified, go to next step.
7) Using DVOM, check resistance across EGR solenoid
terminals. If resistance is not 36-44 ohms at 68
F (20C), replace
solenoid. If resistance is as specified, go to step 9).
8) Turn ignition switch to ON position. Using scan tool, turn
EGR solenoid on and off (item 10). Listen for clicking sound from EGR
solenoid. If no sound is heard, replace EGR solenoid. If sound is
heard, go to next step.
9) On 3000GT, go to next step. On Montero, disconnect EGR
solenoid connector and MFI relay connector. Using DVOM, check
continuity between EGR solenoid connector terminal No. 1 and MFI relay
connector terminal No. 3. If continuity does not exist, repair wiring
harness as necessary. If continuity exists, go to step 11).
10) Disconnect EGR solenoid connector. Using DVOM, check
voltage between chassis ground and EGR solenoid connector terminal No.
1. If battery voltage does not exist, repair wiring harness as
necessary. If battery voltage exists, go to next step.
11) Turn ignition switch to OFF position. Disconnect PCM
connector. Ground PCM connector terminal No. 6. Using DVOM, check for
Page 763 of 1501
4) Using DVOM, check resistance across EVAP purge solenoid
terminals. If resistance is not 36-44 ohms at 68F (20C), replace
EVAP purge solenoid. Go to step 8). If resistance is as specified, go
to next step.
5) On 3000GT, go to next step. On Montero, disconnect EVAP
purge solenoid connector and MFI relay connector. Using DVOM, check
continuity between EVAP purge solenoid connector terminal No. 1 and
MFI relay connector terminal No. 1. If continuity does not exist,
repair wiring harness as necessary. If continuity exists, go to step
7).
6) Disconnect EVAP purge solenoid connector. Using DVOM,
check voltage between chassis ground and EVAP purge solenoid connector
terminal No. 1. If battery voltage does not exist, repair wiring
harness as necessary. If battery voltage exists, go to next step.
7) Turn ignition switch to OFF position. Disconnect PCM
connector. Ground PCM connector terminal No. 16. Using DVOM, check for
continuity between chassis ground and EVAP purge 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.
8) Road test vehicle and attempt to duplicate conditions that
caused original complaint. Recheck for DTCs. If no DTCs are displayed,
test is complete.
DTC P0446: EVAPORATIVE (EVAP) EMISSION CONTROL SYSTEM VENT
CONTROL 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 vent solenoid on and off (item
29). Listen for clicking sound from EVAP vent solenoid. If no sound is
heard, go to next step. If sound is heard, fault is intermittent. See
INTERMITTENT DTCS .
2) Disconnect EVAP vent solenoid connector and MFI relay
connector. Using DVOM, check continuity between EVAP vent solenoid
connector terminal No. 1 and MFI relay connector terminal No. 1. If
continuity does not exist, repair wiring harness as necessary. If
continuity exists, go to next step.
3) Turn ignition switch to OFF position. Disconnect PCM
connector. Ground PCM connector terminal No. 35. Using DVOM, check for
continuity between chassis ground and EVAP vent 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.
4) Road test vehicle and attempt to duplicate conditions that
caused original complaint. Recheck for DTCs. If no DTCs are displayed,
test is complete.
DTC P0450: EVAPORATIVE (EVAP) EMISSION CONTROL SYSTEM
PRESSURE SENSOR MALFUNCTION
NOTE: For terminal identification, see TERMINAL IDENTIFICATION. For
circuit and wire color identification, see
L - WIRING DIAGRAMS article.
1) Using scan tool, check Fuel Tank Differential Pressure
(FTDP) sensor pressure (item 73). Pressure should be -0.48-0.48 psi.\
If pressure is not as specified, go to next step. If pressure is as
specified, fault is intermittent. See INTERMITTENT DTCS.
2) Remove fuel cap. Install a fuel tank filler tube adapter
in place of fuel cap. Connect a hand-held pressure/vacuum pump to fuel
Page 767 of 1501
Fig. 40: Identifying VSS Test Terminals (Montero)
Courtesy of Mitsubishi Motor Sales of America
3) VSS is located at end of speedometer cable at
transmission. Connect battery, resistor (3-10 ohms) and voltmeter to
indicated terminals. See Fig. 41. Ensure voltage pulses 4 times per
speedometer shaft revolution. If voltage is not as specified, replace
VSS. If voltage is as specified, go to step 5).
Fig. 41: Testing VSS
Courtesy of Mitsubishi Motor Sales of America
4) With an assistant, road test vehicle. Drive vehicle at 25