sensor MITSUBISHI MONTERO 2000 Service Owners Manual

GDI -Troubleshooting <A/T>13A-143
OK
Check the harness wire between the
intermediate connector and the
engine-A/T-ECU, and repair if
necessary.NG
Repair
NG
NG
Repair
NG
Repair
(2) NGMeasure at engine-A/T-ECU
connector D-120.
DMeasure the voltage at the
engine-A/T-ECU terminal.
DDisconnect connector B-110.
DIgnition switch: ON
DThe voltage between terminal 50
and earth
OK:
4.8 - 5.2 VOKCheck the following connector
:
D-120
Check the harness wire between the
intermediate connector and earth,
and repair if necessary.
OK
Check the harness wire between the
intermediate connector and the
engine controlrelay, and repair if
necessary.
(3) NG
OK
Measure at intermediate connector
B-110
DDisconnect the connector and
measure at the harness side.
(1) The voltage between terminal 1
and earth
(Ignition switch: ON)
OK:
System voltage
(2) The voltage between terminal 2
and earth
(Ignition switch: ON)
OK:
4.8 - 5.2 V
(3) The resistance between terminal
3 and earth
OK:
2Wor less(1) NGCheck the following connector:
B-25XNG
Repair
OK
Replace the camshaft position
sensor
Check the trouble symptoms.
OK
NG
Repair
OK
Check the harness wires between the intermediate connector and the engine-A/T-ECU,
the intermediate connector and theengine controlrelay, and the intermediate connector
and earth. Then, repair if necessary.
NG
Replace the engine-A/T-ECU.
OK
Check the harness wire between the
intermediate connector and the
engine-A/T-ECU.NG
Repair
OK
Use an analyzer to measure the
output waveform at intermediate
connector B-110.
DUse test harness (MB991658) to
connect the connector, and
measure at the pick-up harness.
DEngine: Idling
DSelector lever position: P
DThe voltage between terminal 2
and earth
OK:
A normal waveform should
be displayed as described
on P.13A-212 (Inspection
Procedure Using an Ana-
lyzer), its maximum value
should be 4.8 V or more,
and its minimumvalue
should be 0.6 V or less
with no noise in waveform.(1) NGCheck the following connector:
B-23NG
Repair
OK
Check the harness wire between the
camshaft position sensor and the
intermediate connector.NG
Repair
NG
Check the camshaft position sensing
cylinderNG
OK
Check the trouble symptoms.Intermittent malfunction
(Refer to GROUP 00 - Points to Note for Intermittent Malfunctions.)
OK
Check the trouble symptoms.NGReplace the engine-A/T-ECU.
Replace
OK
Check the following connector:
B-110
Check the following connector:
D-120
Check the following connectors:
B-25X, D-120


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GDI -Troubleshooting <A/T>13A-144
Code No.24 Vehicle speed sensor systemProbable cause
Range of Check
DEngine: Two seconds after theengine wasstarted
DIdle switch: OFF
DEngine speed: 2,500 r/min or more
DDuring high engine load
Set Conditions
DThe sensor output voltage does not change for 4 seconds (no pulse signal
input).DMalfunction of the vehicle speed sensor
DOpen or short circuit in the vehicle speed sensor
circuit or loose connector contact
DMalfunction of engine-A/T-ECU
NOCheck the vehicle speed sensor
(Refer to GROUP 54 - Combination Meter.)
YES
Use an analyzer to measure the output waveform of the
vehicle speed sensor at engine-A/T-ECU connector C-09.
DDriving the vehicle
DSelector lever position: P
DThe voltage between terminal 80 and earth
OK:
A normal waveform should be displayed as described
in OSCILLOSCOPE INSPECTION PROCEDURE,
and noise should not be displayed in the waveform.
(Refer to GROUP 23 - Troubleshooting.)NGCheck the following connectors:
C-09, E-13
NG
Repair
OK
Check the harness wire between intermediate connector E-13
and the engine-A/T-ECU, and repair if necessary.
OK
Check the following connector:
C-09NG
Repair
OK
Check the trouble symptoms.
NG
Replace the engine-A/T-ECU.
Does the speedometer operate normally?


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GDI -Troubleshooting <A/T>13A-145
Code No.25 Barometric pressure sensor systemProbable cause
Range of Check
DTwo seconds have passed since the ignition switch is turned ON or the
engine startingprocess is completed.
DBattery voltage: 8 V or more
Set Conditions
DThe sensor output voltage is 4.5 V or more for four seconds (equivalent to
114 kPa of barometric pressure)
or
DThe sensor output voltage is 0.2 V or less (equivalent to 53 kPa of
barometric pressure)DMalfunction of barometric pressure sensor
DOpen or short circuit in barometric pressure
sensor circuit or loose connector contact
DMalfunction of engine-A/T-ECU
(2) NGCheck the following connector:
D-121NG
Repair
OK
Check the harness between the air
flow sensor and the engine-A/T-ECU,
and repair if necessary.
MUT-
IIData list
25 Barometric pressure sensor
(Refer to P.13A-198, DATA LIST
REFERENCE TABLE.)OKTransient malfunction
(Refer to GROUP 00 - Points to
Note for Intermittent Malfunctions.)
NG
NG
Repair
OK
Measure at air flow sensor connector
B-120.
DDisconnect the connector and
measure at the harness side.
(1) Voltage between terminal 1 and
earth (Ignition switch: ON)
OK:
4.8 - 5.2 V
(2) Resistance between terminal 5
and earth
OK:
2Wor less(1) NGMeasure at engine-A/T-ECU
connector D-121.
DMeasure the voltage at the
engine-A/T-ECU terminal.
DIgnition switch: ON
DVoltage between terminal 87 and
earth
OK:
4.8 - 5.2 VOKCheck the following connector:
D-121
NG
Repair
NG
Check the following connector:
D-121NG
Repair
OK
Check the harness between the air
flow sensor and the engine-A/T-ECU.NG
Repair
OK
Check the trouble symptoms.NGReplace the engine-A/T-ECU.
OK
Measure at air flow sensor connector
B-120.
DConnect connector terminals
No.1, No.2 and No.5 only by
using test harness (MB991709),
and measure at the pick - up
harness.
DIgnition switch: ON
(1) Voltage between terminal 1 and
earth
OK:
4.8 - 5.2 V
(2) Voltage between terminal 2 and
earth
OK:
Altitude 0 m: 3.7 - 4.3 V
Altitude 1200 m:
3.2 - 3.8 V
(3) Voltage between terminal 5 and
earth
OK:
0.5 V or less(1) NGCheck the following connector:
D-121NG
Repair
OK
Check the harness between the air
flow sensor and the engine-A/T-ECU,
and repair if necessary.
OK
To the nextpage(3) NG
(2) NG
Replace the air flow sensor.
NG
Check the following connector:
D-120NG
Repair
OK
Check the harness between the air
flow sensor and the engine-A/T-ECU,
and repair if necessary.
OK
Check the harness between the air
flow sensor and the engine-A/T-ECU.NG
Repair
OK
Check the trouble symptoms.NGReplace the engine-A/T-ECU.
Check the following connector:
B-120
Check the trouble symptoms.


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GDI -Troubleshooting <A/T>GDI -Troubleshooting <A/T>13A-146
OK
Check the harness between the air
flow sensor and the engine-A/T-ECU,
and repair if necessary.
From the previouspage
OK
Measure at engine-A/T-ECU
connector D-120.
DMeasure the voltage at the
engine-A/T-ECU terminal.
DIgnition switch: ON
DVoltage between terminal 55 and
earth
OK:
Altitude 0 m: 3.7 - 4.3 V
Altitude 1200 m:
3.2 - 3.8 VNGCheck the following connector:
D-120NGRepair
OK
Check the trouble symptoms.
OKCheck the following connector:
D-120NG
Repair
NG
Replace the engine-A/T-ECU.
Code No.31 Detonation sensor systemProbable cause
Range of Check
DEngine: Two seconds after theengine has beenstarted
Set Conditions
DChanges in sensor output voltage (detonation sensor peak voltage per 1/3
crankshaft rotation) in 200 consecutivecycles are0.08 V or less.DMalfunction of the detonation sensor
DOpen or short circuit in the detonation sensor
circuit or loose connector contact
DMalfunction of engine-A/T-ECU
Check the following connector:
B-05NG
Repair
OK
Measure at the detonation sensor connector B-05.
DDisconnect the connector and measure at the harness
side.
DThe resistance between terminal 2 and earth
OK:
2Wor lessNGCheck the harness wire between the detonation sensor and
earth, and repair if necessary.
OK
Check the following connector:
D-121NG
Repair
OK
Check the harness wire between the detonation sensor and
the engine-A/T-ECU.NG
Repair
OK
Check the trouble symptoms.OKIntermittent malfunction
(Refer to GROUP 00 - Points to Note for Intermittent
Malfunctions.)
NG
Replace the detonation sensor.
Check the trouble symptoms.
NG
Replace the engine-A/T-ECU.


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GDI -Troubleshooting <A/T>13A-148
OK
Use an analyzer to measure the
signal waveform at engine-A/T-ECU
connectors D-119 and D-120.
DEngine: Idling
DSelector lever position: P
DVoltage between terminal 1 and
earth
OK:
A normal waveform should
be displayed as described
on P.13A-214 (INSPEC-
TION PROCEDURE US-
ING AN ANALYZER).NGCheck the following connector:
B-61
OK
Check the following connectors:
B-117 <No.1 injector>, B-114 <No.2
injector>, B-118 <No.3 injector>,
B-115 <No.4 injector>, B-103 <No.5
injector>, B-104 <No.6 injector>NG
RepairNG
OK
OK
Check the harness wire between the
injector and the intermediate
connector.NG
Replace the engine-A/T-ECU.
Repair
Repair
From the previouspage
OK
Check the harness wire between
injector and the intermediate
connector.NG
Repair
OK
Replace the injector.
Check the trouble symptoms.NGReplace the injector driver.
Code No.44, 52, 53 Ignition coil (incorporating power
transistor) systemProbable cause
Range of Check
DEngine speed is approx. 50 - 4,000 r/min.
DEngine is not cranking.
Set Conditions
DThe ignition failure sensor does not send a signal about a certain cylinder for
four seconds. However, except that the ignition failure sensor does not send
a signal about all of cylinders.DMalfunction of the ignition coil
DMalfunction of the ignition failure sensor
DMalfunction of sparkplug
DOpen or short circuit in the primary ignition circuit
or loose connector contact
DMalfunction of engine-A/T-ECU


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GDI -Troubleshooting <A/T>13A-149
OK
Check trouble symptom.
OK
Check trouble symptom.
OK
Check the following connectors:
B-101, B-108, B-112,
B-113, B-116, B-119
NG
Repair
OK
Replace the engine-A/T-ECU.
NGNG
Replace the ignition failure sensor.
OK
Check the harness wire between the engine-A/T-ECU and the igni-
tion failure sensor.
OK
Check the ignition failure sensor. (Refer to GROUP 16 - Ignition
System.)NG
Check the following connectors:
B-04, D-120
Check the ignition coil. (Refer to GROUP 16 - Ignition System.)NG
Replace
Measure at the ignition coil connectors B-101, B-108, B-112, B-113,
B-116, B-119.
DDisconnect the connector, and measure at the harness
side.
(1) Voltage between 1 and earth (Ignition switch: ON)
OK:
System voltage
(2) Voltage between 3 and earth (Engine: cranking)
OK:
0.5 - 4.0 V
(3) Continuity between 2 and earth
OK:
ContinuityReplace
OK
NG
Repair
OK
Check the following connectors:
B-07, B-107, E-13, D-223
<LHD> (1) NG
NGRepair
NG
Check and repair the harness wire between the ignition coil and
ignition failure sensor.
Check and repair the harness wire between the ignition failure
sensor and ignition switch.
Check the following connectors:
B-107, D-119
Repair
NG
(2) NG
OK
Check trouble symptom.
Check the harness wire between the engine-A/T-ECU and the igni-
tion coil.
Repair
NGOK
Replace the engine-A/T-ECU.
Check and repair the harness wire between the ignition coil and
earth. (3) NG
Measure at the ignition failure sensor connector B-04.
DDisconnect the connector, and measure at the harness
side.
(1) Voltage between 2 and earth (Ignition switch: ON)
OK:
4 V or more
(2) Continuity between 1 and earth
OK:
Continuity
NG
There is short circuit oropencircuit in the ignition signal output
harness of the ignition failure sensor. Check and repair the harness. (1) NG
Check and repair the harness wire between the ignition failure
sensor and earth. (2) NG
Measure at the engine-A/T-ECU connector D-120.
DConnect the connector.
DVoltage between 45 and earth (Engine: 3,000 r/min)
OK:
0.3 - 3.0 VOK
Repair
NG


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GDI -Troubleshooting <A/T>13A-151
Code No.56 Abnormal fuel pressureProbable cause
Range of Check
DIgnition switch: ON
Set Conditions
DThe sensor output voltage is 4.8V or more, or 0.2 V or less for four
seconds.DMalfunction of of fuel pressure sensor
DOpen or short circuit in the fuel pressure sensor
circuit or loose connector contact
DMalfunction of engine-A/T-ECU
Range of Check
DThe following conditions are detected temporarily after the engine has been
started.
(1) Engine speed: 1,000 r/min or more
(2) Fuel pressure: 2 MPa or more
DEngine running
Set Conditions
DThe fuel pressure is 6.9 MPa or more, or 2 MPa or less for four seconds.DMalfunction of high-pressure fuel pump
DClogging of high-pressure fuel lines
This diagnosis code will also be output when air is trapped into the
high-pressure fuel lines (such as poor fuel level). In that case, the air can be
evacuated by operating the engine for atleast 15 seconds at 2,000 r/min. After
the repair, use the MUT-IIto erase the diagnosis code.DAir trapped due to poor fuel level
(2) NGCheck the following connector:
D-121NG
Repair
OK
Check the harness wire between the
intermediate connector and the
engine-A/T-ECU, and repair if
necessary.
MUT-
IIData list
74 Fuel pressure sensor (Refer to
13A-198, DATA LIST
REFERENCE TABLE.)OKTransient malfunction
(Refer to GROUP 00 - Points to
Note for Intermittent Malfunctions.)
NG
Check the following connector:
B-35NG
Repair
OK
Measure at intermediate connector
B-110.
DDisconnect the connector, and
measure at the engine-A/T-ECU
harness side.
(1) Voltage between terminal 4 and
earth (Ignition switch: ON)
OK:
4.8 - 5.2 V
(2) Resistance between terminal 6
and earth
OK:
2Wor less(1) NGMeasure at engine-A/T-ECU
connector D-121.
DMeasure the voltage at the
engine-A/T-ECU terminal.
DIgnition switch: ON
DVoltage between terminal 87 and
earth
OK:
4.8 - 5.2 VOKCheck the following connector:
D-121
NG
Repair
NG
Check the following connector:
D-121NG
Repair
OK
Check the harness wire between the
intermediate connector and the
engine-A/T-ECU.NG
Repair
OK
Check the trouble symptoms.NGReplace the engine-A/T-ECU.
OK
Check the trouble symptoms.NGReplace the engine-A/T-ECU.
OK
To the nextpage
OK
Check the harness wire between the
intermediate connector and the
engine-A/T-ECU, and repair if
necessary.NG
Repair


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GDI -Troubleshooting <A/T>13A-152
NG
(2) NGCheck the following connector:
B - 111NG
Repair
OK
Measure at intermediate connector
B-110.
DUse test harness (MB991658) to
connect the connector, and
measure at the pick-up harness.
DEngine: Idling
DSelector lever position: P
(1) Voltage between terminal 4 and
earth
OK:
4.8 - 5.2 V
(2) Voltage between terminal 5 and
earth
OK:
0.3 - 4.7 V
(3) Voltage between terminal 6 and
earth
OK:
0.5 V or less(1), (3) NGCheck the following connector:
B - 111
OK
Check the following connector:
D-121NG
Repair
OK
Check the harness wire between the
fuel pressure sensor and the
intermediate connector.NG
Repair
From the previouspage
OK
Check the harness wire between the
intermediate connector and the
engine-A/T-ECU, and repair if
necessary.
OK
Check the harness wire between the
fuel pressure sensor and the
intermediate connector.NG
Repair
OK
Replace the fuel pressure sensor.
Check the trouble symptoms.
Check the following connector:
D-121NG
Repair
NG
Check the harness wire between the
intermediate connector and the
engine-A/T-ECU, and repair if
necessary.
OK
Measure at engine-A/T-ECU
connector D-121.
DMeasure the voltage at the
engine-A/T-ECU terminal.
DEngine: Idling
DSelector lever position: P
DVoltage between terminal 93 and
earth
OK:
0.3 - 4.7 VNGCheck the following connector:
D-121NG
Repair
OK
Check the harness wire between the
intermediate connector and the
engine-A/T-ECU, and repair if
necessary.
OKCheck the following connector:
D-121NG
Repair
OK
Check the trouble symptoms.
OK
Replace the engine-A/T-ECU.OKRepair


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GDI -Troubleshooting <A/T>13A-154
Code No.77 Accelerator pedal position sensor (2nd
channel) systemProbable cause
Range of Check
DAcceleratorpedal positionsensor (1st channel) is normal.
DCommunication between the engine-A/T-ECU and the throttle valve controller
is normal.
Set Conditions
DOutput voltage of the accelerator pedal positionsensor (2nd channel) is 0.2
V or less for one second
or
DOutput voltage of the accelerator pedal positionsensor (1st channel) is 2.5 V
or less, and output voltage of the acceleratorpedal positionsensor (2nd
channel) is 4.5 V or more for one second.
or
DDifference between the accelerator pedal positionsensor (1st and 2nd
channels) output voltages exceeds 1.0 V (i.e. when the throttle valveopening
anglechanges slightly).DMalfunction of accelerator pedal positionsensor
(2nd channel)
DOpen or short circuit in acceleratorpedal position
sensor (2nd channel) circuit or loose connector
contact
DMalfunction of the throttle valve controller
DMalfunction of engine-A/T-ECU
OKIntermittent malfunction
(Refer to GROUP 00 - Points to
Note for Intermittent Malfunctions.)
NG
Check the acceleratorpedal position
sensor (Refer to P.13A-229.)NG
Replace
OK
Measure at accelerator pedal position
sensor connector D-135
DDisconnect the connector and
measure at the harness side.
(1) The resistance between terminal
7 and earth
OK:
2Wor less
(2) The voltage between terminal 8
and earth
(Ignition switch: ON)
OK:
4.8 - 5.2 V(1) NGCheck the following connector:
D-11NG
Repair
OK
Check the following connector:
D-45NG
Repair
Check the harness wire between
accelerator pedal positionsensor
(2nd channel) and the throttle valve
controller.NG
Repair
OK
Check the trouble symptoms.NGReplace the throttle valve controller.
(2) NGMeasure at throttle valve controller
connector D-11.
DMeasure voltage at the throttle
valve controller connector
terminals.
DIgnition switch: ON
DThe voltage between terminal 6
and earth
OK:
4.8 - 5.2 VOK
OK
Check the harness wire between
accelerator pedal positionsensor
(2nd channel) and the throttle valve
controller, and repair if necessary.NG
Repair
NG
Check the following connector:
D-11NG
Repair
OK
Check the harness wire between
accelerator pedal positionsensor
(2nd channel) and the throttle valve
controller.NG
Repair
OK
To the nextpage
OK
Check the trouble symptoms.NGReplace the throttle valve controller. OK
MUT-
IIData list
77 Acceleratorpedal positionsensor
(2nd channel) (Refer to P.
13A-198, DATA LIST
REFERENCE TABLE.)
Check the following connector:
D-11


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GDI -Troubleshooting <A/T>13A-155
OK
Measure at throttle valve controller
connector D-11.
DMeasure voltage at the throttle
valve controller connector
terminals.
DIgnition switch: ON
DThe resistance between 20 and
earth
OK:
Acceleratorpedalfully re-
leased: 0.985 - 1.085 V
Acceleratorpedalfully de-
pressed: 4.0 V or higherNGCheck the following connector:
D-11NG
Repair
NG
NG
Repair
OK
Check the trouble symptoms.
OK
Measure at accelerator pedal position
sensor (2nd channel) connector
D-135.
DUse test harness (MB991658) to
connect terminals No.6, No.7,
No.8 only, and measure at the
pick-up harness side.
DIgnition switch: ON
(1) The voltage between terminal 6
and earth
OK:
Acceleratorpedalfully re-
leased: 0.985 - 1.085 V
Acceleratorpedalfully de-
pressed: 4.0 V or higher
(2) The voltage between terminal 7
and earth
OK:
0.5 V or more
(3) The voltage between terminal 8
and earth
OK:
4.8 - 5.2 V(1) NGAdjust the acceleratorpedal position
sensor (2nd channel). (Refer to
P.13A-221.)
From the previouspage
OK
Check the harness wire between
accelerator pedal positionsensor (2nd
channel) and the throttle valve controller.
(2), (3) NGCheck the following connector:
D-11NGRepair
OK
Check the harness wire between
accelerator pedal positionsensor (2nd
channel) and the throttle valve controller.
OK
Check the harness wire between
accelerator pedal positionsensor (2nd
channel) and the throttle valve controller.
OKCheck the following connector:
D-11NGRepair
NG
Replace the throttle valve controller.
Check the following connector:
D-11


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