2000 MITSUBISHI MONTERO fuel pump

GDI -General Information13A-5
Items Specifications
SensorsAir flow sensorKarman vortex type
Barometric pressure sensorSemiconductor type
Intake air temperature sensorThermistor type
Engine coolant temperature sensorThermistor type
Oxygen sensorZirconia type
Accelerator pedal position sensor (1st
and 2nd channels)Variable resistor type
Accelerator pedal position switchRotary contact type, within accelerator pedal position
sensor (1st channel)
Vehicle speed sensorMagnetic resistive element type
Inhibitor switchContact switch type
Camshaft position sensorHall element type
Crank angle sensorHall element type
Detonation sensorPiezoelectric type
Fuel pressure sensorMetallic membrane type
Power steering fluid pressure switchContact switch type
ActuatorsEngine control relay typeContact switch type
Fuel pump relay typeContact switch type
Injector driver control relayContact switch type
Injector type and numberElectromagnetic type, 6
Injector identification markDIM 1070
Throttle valve control servo relayContact switch type
Throttle valve control servoBrushless DC-motor type
EGR valveStepper motor type
Purge control solenoid valveDuty cycle type solenoid valve
Fuel pressure
regulator (low
pressure)Regulator pressure kPa329
Fuel pressure
regulator
(high pres-
sure)Regulator pressure MPa5.0


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GDI -Troubleshooting 13A-34
Code No.P0170 Abnormal fuel systemProbable cause
Range of Check
DEngine: Being learning the air - fuel ratio
Set Conditions
DTen seconds or more havebeenpassed while the fuel injection amount
compensation value is too low.
or
DTen seconds or more havebeenpassed while the fuel injection amount
compensation value is too high.DMalfunction of fuel supply system
DMalfunction of oxygen sensor (front)
DMalfunction of intake air temperature sensor
DMalfunction of barometric pressure sensor
DMalfunction of air flow sensor
DMalfunction of engine-ECU
Repair
OK
MUT-
IIData list
74 Fuel pressure sensor (Refer to
13A-105, DATA LIST
REFERENCE TABLE.)NGCheck fuel leakage around the fuel
pump (high-pressure) line.NG
NO
Check the air intake from the intake
hose and intake manifold.NG
Repair
OK
Check the oxygen sensor (front)
(Refer to P.13A-230.)NG
Replace
MUT-
IISelf-Diag Code
Is any diagnosis code other than
No.P0170 output?YESRefer to P.13A-15, INSPECTION
CHART FOR DIAGNOSIS CODES.
OK
Check the exhaust gas leaks from
the exhaust manifold.NG
Repair
OK
Check the throttle body (around the
throttle valve), and clean if
necessary. (Refer to P.13A-220).NG
Cleaning
OK
MUT-
IIData list
11 Oxygen sensor (front)
12 Air flow sensor
13 Intake air temperature sensor
21 Engine coolant temperature
sensor
25 Barometric pressure sensor
(Refer to 13A-105, DATA LIST
REFERENCE TABLE.)
Reference
If all the service data is normal, go
to “OK.”
If any abnormal service is found, go
to “NG.”NGRefer to the Inspection procedure for
the sensor, which is indicated by the
abnormal service data.
(Refer to P.13A-15, INSPECTION
CHART FOR DIAGNOSIS CODES.)OK
Replace the fuel pump
(high-pressure).
Check the purge control solenoid
valve (Refer to GROUP 17 -
Emission Control).NG
Replace
OK
To the nextpageOK


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GDI -Troubleshooting 13A-35
OK
Check the injectors for clogging or
leaks.NG
Repair
OK
Check the fuel lines for fuel leaks.NG
Repair
OK
Check the fuel pressure between the
fuel pump(low-pressure) and the
fuel pump (high-pressure)(Refer to
P.13A-222).NG
From the previouspage
OK
Check the trouble symptoms.OKTransient malfunction
(Refer to GROUP 00 - Points to
Note for Intermittent Malfunctions.)
NG
Replace the engine-ECU.
OK
Check the EGR valve (Refer to
GROUP 17 - Emission Control).NG
Replace
Repair


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GDI -Troubleshooting 13A-36
Code No.P0190 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-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-118NG
Repair
OK
Check the harness wire between the
intermediate connector and the
engine-ECU, and repair if necessary.
MUT-
IIData list
74 Fuel pressure sensor (Refer to
13A-105, DATA LIST
REFERENCE TABLE.)OKTransient malfunction
(Refer to GROUP 00 - Points to
Note for Intermittent Malfunctions.)
NG
Check the following connector:
B-110NG
Repair
OK
Measure at intermediate connector
B-110.
DDisconnect the connector, and
measure at the engine-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-ECU connector
D-117.
DMeasure the voltage at the
engine-ECU terminal.
DIgnition switch: ON
DVoltage between terminal 41 and
earth
OK:
4.8 - 5.2 VOKCheck the following connector:
D-117
NG
Repair
NG
Check the following connector:
D-117NG
Repair
OK
Check the harness wire between the
intermediate connector and the
engine-ECU.NG
Repair
OK
Check the trouble symptoms.NGReplace the engine-ECU.
OK
Check the trouble symptoms.NGReplace the engine-ECU.
OK
To the nextpage
OK
Check the harness wire between the
intermediate connector and the
engine-ECU.NG
Repair


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GDI -Troubleshooting 13A-77
Inspection procedure 5
No initial combustion (starting impossible)
Probable cause
This is caused by incorrect fuel supply into the combustion chamber, and improper
ignition circuit. Besides that, foreign material may be contaminated in fuel.DMalfunction of the fuel supply system
DMalfunction of the ignition system
DMalfunction of the engine-ECU
Check system voltage while theengine iscranking.
OK:
8 V or moreNGCheck the battery. (Refer to GROUP 55 - Battery.)
OK
MUT-
IISelf-Diag code
Is a diagnosis code displayed?Ye sRefer to P.13A-15, INSPECTION CHART FOR DIAGNOSIS
CODES.
No
MUT-
IIData list
16 System voltage (Refer to P.13A-105.)NGCheck theengine controlrelay and ignition switch-IG system. (Refer
to P.13A-99, Inspection procedure 26.)
OK
Does the camshaft rotate when theengine is cranking?NoCheck if thetiming belt isbroken ordamaged.
Ye s
MUT-
IIActuator test
07 Fuel pump(low pressure) (Refer to P.13A-110.)NGCheck the fuelpump(low pressure) system. (Refer to P.13A-101,
Inspection procedure 29.)
OK
MUT-
IIData list
22 Crankanglesensor (Refer to P.13A-105.)NGCheck the crankanglesensor system. (Refer to P.13A-56, code
No. P0335.)
OK
MUT-
IIData list
21 Engine coolant temperature sensor (Refer to P.13A-105.)NGCheck theengine coolant temperaturesensor system. (Refer to
P.13A-22, code No. P0115.)
OK
MUT-
IIData list
79 Throttle position sensor (1st channel) (Refer to P.13A-105.)NGCheck the throttle position sensor (1st channel) system. (Refer
to P.13A-25, code No. P0120.)
OK
Inspectenginestart ability by cranking theengine while theaccelera-
tor pedal isslightly depressed.OKClean around the throttle valve. (Refer to P.13A-220.)
NG
Check fuel leakage. (Refer to P.13A-225.)NG
Repair
OK
Measure low fuel pressure between the fuelpump(low pressure)
and fuel pump (highpressure). (Refer to P.13A-222.)NG
Repair
OK
Measure at ignition coil connectors B-101, B-108, B-112, B-113,
B-116, B-119.
DConnect the connector.
DConnect atiming light to theNo.1 terminal of each connector
in turn.
(Engine cranking)
OK:
The timing lightflashes.NGCheck the ignition coil (incorporating power transitor) system. (Refer
to P.13A-53, code No. P0300.)
OK
Check ignitiontiming while the engine iscranking.
OK:
Approx. 5_BTDCNGCheck that the crankanglesensor andtiming beltcover are properly
installed.
OK
To the nextpage
Measure at injector driver connector B-121.
DDisconnect the connector, and measure at the connector side.
DVoltage between each of terminals 4, 12, 21 and earth
(Ignition switch: ON)
OK:
System voltageCheck the injector driver system. (Refer to P.13A-104, Inspection
procedure 34.) NG
OK


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GDI -Troubleshooting 13A-79
Inspection procedure 6
Initial combustion takes place, but does not complete
(start impossible), too long time to start (poor start)
Probable cause
This may be caused by improper sparkplug ignition (poorspark), improper mixture
during enginecranking, improper fuel pressure.DMalfunction of the fuel supply system
DMalfunction of the fuel pressure sensor
DMalfunction of the ignition system
DMalfunction of the electronic-controlled throttle vale
system
DMalfunction of the engine-ECU
Check system voltage while theengine iscranking.
OK:
8 V or moreNGCheck the battery. (Refer to GROUP 55 - Battery.)
OK
MUT-
IISelf-Diag code
Is a diagnosis code displayed?Ye sRefer to P.13A-15, INSPECTION CHART FOR DIAGNOSIS
CODES.
No
MUT-
IIActuator test
07 Fuel pump(low pressure) (Refer to P.13A-110.)NGCheck the fuelpump(low pressure) system. (Refer to P.13A-101,
Inspection procedure 29.)
OK
MUT-
IIData list
21 Engine coolant temperature sensor (Refer to P.13A-105.)NGCheck theengine coolant temperaturesystem. (Refer to P.13A-22,
code No. P0115.)
OK
MUT-
IIData list
18 Cranking signal (Refer to P.13A-105.)NGCheck the ignition switch-ST system. (Refer to P.13A-99, Inspection
procedure 27.)
OK
MUT-
IIData list
74 Fuel pressure sensor (Refer to P.13A-105.)NGCheck an abnormal fuel pressure system. (Refer to P.13A-36, code
No. P0190.)
Check fuel leakage. (Refer to P.13A-225.)NG
Repair
OK
Is the enginestarted normally when it is cranked with the accelerator
pedal depressed slightly?Ye sClean around the throttle valve. (Refer to P.13A-220.)
No
MUT-
IIData list
79 Throttle position sensor (1st channel) (Refer to P.13A-105.)NGCheck the throttle valve position feedback system. (Refer to
P.13A-65, code No. P1221.)
OK
Check ignitiontimingwhen theengine iscranked.
OK:
approx. 5_BTDCNGCheck that the crankanglesensor andtiming beltcover are properly
installed.
OK
To the nextpageOK


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GDI -Troubleshooting 13A-82
OK
Check that air is sucked in the air intake system.
DBroken intake manifold gasket
DDamaged vacuum hose
DDamaged air intake hose
From the previouspage
OK
MUT-
IIData list
27 Power steering fluid pressure switch (Refer to P.13A-105.)NGCheck the power steering fluid pressure switch system. (Refer
to P.13A-102, Inspection procedure 30.)
OK
MUT-
IIData list
28 A/C switch (Refer to P.13A-105.)NGCheck the A/C switch and A/C relay system. (Refer to P.13A-102,
Inspection procedure 31.)
OK
MUT-
IIData list
67 Stoplampswitch (Refer to P.13A-105.)NGCheck the stoplampswitch. (Refer to P.13A-103, Inspection proce-
dure 32.)
OK
MUT-
IIData list
31 Small lampswitch (Refer to P.13A-105.)NGCheck the smalllampswitch system. (Refer to P.13A-104, Inspec-
tion procedure 33.)
OK
MUT-
IIData list
68 EGR valve (Refer to P.13A-105.)NGCheck the EGR valve. (Refer to P.13A-60, code No. P0403.)
OK
NG
Check that the crankanglesensor andtiming beltcover are properly
installed.
OK
Check ignition coil spark for each cylinder.
(1) Remove the ignition coil.
(2) Install a new sparkplug to the removed ignitioncoil.
(3) Disconnect the injector intermediate connector.
Caution
Never touch the connector terminal as approx. 100 V is
applied to the injector, or you are seriously injured.
(4) Earth the sparkplug electrodesecurely.
(5) Check that the sparkplug igniteswhen theengine iscranked.NGReplace the ignition coil.
OK
Check trouble symptom.
Check all the following items in that order.
(1) Spark plugs
(2) Exhaust gas emission control system
(3) EGR system
(4) Compression pressure
(5) Foreign material (such as water or kerosine)entered the fuel
line.
(6) Air is sucked in the air intake system, or EGR gas leaks.
DDamaged intake manifoldgasket
DDamaged air intake hose
DDamaged vacuum hose
DFaulty EGR valve seat
OK
MUT-
IIData list
11 Oxygen sensor (front)
OK:
0 - 400 mV and 600 - 1,000 mV alternates when the
engine is idling(wait for four minutes after theengine
started).NG
NG
Repair
Measure fuel high-pressure between the fuel pump (highpressure)
and injector. (Refer to P.13A-224.)
Clean around the throttle valve. (Refer to P.13A-220.)
NG
Check ignition timing. (Refer to GROUP 11A - Engine Adjustment.)


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GDI -Troubleshooting 13A-84
Inspection procedure 9
When the engine is cold, it stalls at idling. (Die out)
Probable cause
The cause is probably an incorrect air/fuel ratio or poor intake airamountwhen the
engine iscold.DMalfunction of the electronic-control throttle valve
system
DMalfunction of the throttle body
Have the battery terminalsbeen disconnectedrecently?Ye sWarm up the engine, and then let it run at idle for approx. ten
minutes.
No
MUT-
IISelf-Diag code
Is a diagnosis code displayed?Ye s(Refer to P.13A-15, INSPECTION CHART FOR DIAGNOSIS
CODES.)
No
Is the engine idlingcorrect after theengine has been warmed up?Ye sRefer to “Unstableidling (rough idle, hunting).”(Refer to P.13A-81,
Inspection procedure 7.)
No
MUT-
IIData list
22 Crankanglesensor (Refer to P.13A-105.)
Checkidlingspeed when theengine iscold.NGCheck the throttle valve position feedback system. (Refer to
P.13A-65, code No. P1221.)
OK
MUT-
IIData list
26 Acceleratorpedal positionswitch (Refer to P.13A-105.)NGCheck the accelerator position switch. (Refer to P.13A-100, Inspec-
tion procedure 28.)
OK
MUT-
IIData list
21 Engine coolant temperature sensor (Refer to P.13A-105.)NGCheck theengine coolant temperaturesensor. (Refer to P.13A-22,
code No. P0115.)
OK
MUT-
IIData list
68 EGR valve (Refer to P.13A-105.)NGCheck the EGR valve system. (Refer to P.13A-60, code No. P0403.)
OK
Does theenginestall immediately after the acceleratorpedal is
released?Ye sClean around the throttle valve. (Refer to P.13A-220.)
No
Measure fuel highpressure between the fuelpump (highpressure)
and injector. (Refer to P.13A-224.)NG
Repair
OK
Check ignition timing. (Refer to GROUP 11A - Engine Adjustment.)NGCheck that the crankanglesensor andtiming beltcover are properly
installed.
OK
Check ignition coil spark for each cylinder.
(1) Remove the ignition coil.
(2) Install a new sparkplug to the removed ignitioncoil.
(3) Disconnect the injector intermediate connector.
Caution
Never touch the connector terminal as approx. 100 V is
applied to the injector, or you are seriously injured.
(4) Earth the sparkplug electrodesecurely.
(5) Check that the sparkplug igniteswhen theengine iscranked.NGReplace the ignition coil.
OK
Check all the following items:
DSpark plugs
DCompression pressure
DEngine oilviscosityNGCheck trouble symptom. OK
Replace the injector.


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