2000 MITSUBISHI MONTERO fuel

GDI -Troubleshooting 13A-110
ACTUATOR TEST REFERENCE TABLE
Item
No.Inspection
itemDrive contentsInspection contentsNormal conditionInspection
procedure
No.Reference
page
01InjectorsCut fuel to No. 1
injectorEngine:
After havingIdling condition
becomes differentCode No.
P020113A-38
02Cut fuel to No. 2
injector
warmed up/Engine
is idling
(Cut the fuel supply(becomes unsta-
ble).
Code No.
P020213A-40
03Cut fuel to No. 3
injectorto each injector in
turn and check
cylinders whichCode No.
P020313A-42
04Cut fuel to No. 4
injectordon’t affect idling.)Code No.
P020413A-44
05Cut fuel to No. 5
injectorCode No.
P020513A-46
06Cut fuel to No. 6
injectorCode No.
P020613A-48
07Fuel pump
(low pressure)Fuel pump
operates and
fuel is recirculated.Ignition switch: ONSound of opera-
tion is heard.Procedure
No. 2913A-101
08Purge
control
solenoid valveSolenoid valve
turns from OFF to
ON.Ignition switch: ONSound of opera-
tion can be heard
when solenoid
valve is
driven.Code No.
P044313A-62
17Basic ignition
timingSet the engine-
ECU to ignition
timing adjustment
modeIdling after engine
warm up5_BTDC--
21Condenser fanDrive the fan motorIgnition switch: ONThe fan motor
operatesProcedure
No.2113A-95
34Electronic-
controlled
throttle valve
systemStop the throttle
control servo.Ignition switch: ONThrottle valve is
opened slightly.Code No.
P122013A-64


www.WorkshopManuals.co.uk


Purchased from www.WorkshopManuals.co.uk

GDI -Troubleshooting 13A-112
Terminal
No.Normal condition Check requirements (engine condition) Check item
16Purge control solenoid valveDEngine cool-Engine: stoppedSystem voltage
ant tempera-
ture:
80 - 95_C
DIgnition
switch: ON
Engine: Start the
engine, and then
increase engine
speed up to 3,500
r/min.Voltage decreases.
18Condenser fan relayCondenser fan is not operating.System voltage
Condenser fan is operating.0-3V
20Fuel pump relayIgnition switch:Engine: stoppedSystem voltage
ON
Engine: idling0-3V
21A/C relayDEngine: idlingSystem voltage, or changes
DA/C switch: OFF®ON
(Compressor is operating)from momentarily 6 V or
more to 0®3V
31Engine warning lampIgnition switch: OFF®ON0-3V®System voltage
(after several seconds)
41Sensor power supplyIgnition switch: ON4.5 - 5.5 V
42Power supply to accelerator
pedal position sensor (1st
channel)Ignition switch: ON4.5 - 5.5 V
43Crank angle sensorEngine: Cranking0.4 - 4.0 V
Engine: Idling1.5 - 2.5 V
44Engine coolant temperature
sensorIgnition switch:
ONEngine coolant
temperature: 0_C3.2 - 3.5 V
Engine coolant
temperature:
20_C2.3 - 2.9 V
Engine coolant
temperature:
40_C1.5 - 2.1 V
Engine coolant
temperature:
80_C0.4 - 1.0 V
45Engine ignition signalEngine: 3,000 r/min0.3 - 3.0 V


www.WorkshopManuals.co.uk


Purchased from www.WorkshopManuals.co.uk

GDI -Troubleshooting 13A-114
Terminal
No.Normal condition Check requirements (engine condition) Check item
63Stop lamp switchDepress the brake pedal.System voltage
Release the brake pedal.0-3V
65A/C switch (2nd channel)Refer to GROUP 55 - Troubleshooting “Check at the A/C-ECU
terminal, engine-ECU output terminals.”
66Clutch switchDepress the clutch pedal.0-3V
Release the clutch pedal.System voltage
68Ignition switch-STEngine: Cranking8V or more
71Oxygen sensor (front)Engine: Warm up, and then hold the
engine speed at 2,500r/min (Use a
digital voltmeter).0«0.8 V alternates.
76Air flow sensor reset signalEngine: Idling0-1V
Engine: 3,000 r/min6-9V
78Throttle position sensor
(2nd channel)Ignition switch:
ONRelease the
accelerator pedal.4.5 - 5.5 V
Depress the
accelerator pedal
fully.0.4 - 0.6 V
79Accelerator pedal position
switchIgnition switch:
ONRelease the
accelerator pedal.0-1V
Depress the
accelerator pedal
fully.4V or more
80Vehicle speed sensorDIgnition switch: ON
DMove the vehicle forward.0«system voltage
alternates.
83A/C switch (1st channel)Engine: IdlingA/C switch: OFF0-3V
A/C switch: ON
(Compressor is
operating)System voltage
88Small lamp switchLighting switch: OFF0-3V
Lighting switch: ON (Taillamp: ON)System voltage
89Oxygen sensor heaterEngine: Idling0-3V
(front)
Engine: 3,500 r/minSystem voltage
90Oxygen sensor heaterEngine: Idling0-3V
(rear)
Engine: 3,500 r/minSystem voltage
92Fuel pressure sensorEngine: Idling0.3 - 4.7 V


www.WorkshopManuals.co.uk


Purchased from www.WorkshopManuals.co.uk

GDI -Troubleshooting 13A-128
FAIL-SAFE FUNCTION REFERENCE TABLE
When the main sensor malfunctions are detected by the diagnosis function, the vehicle is controlled
by means of the pre-set control logic to maintain safe conditions for driving.
Malfunctioning itemControl contents during malfunction
Air flow sensor1. Suspends lean burn operation.
2. Uses the throttle position sensor signal and engine speed signal (crank angle
sensor signal) to take reading of the basic injector drive time and basic ignition
timing from the pre - set mapping.
Intake air temperature sensorControls as if the intake air temperature is 25_
C.
Throttle position sensor (2nd
channel)1. Suspends lean burn operation.
2. Controls the throttle opening angle feedback (half as much as the opening
rate in the normal condition) by using signals from the throttle position sensor
(1st channel). However, this controlling system is not applied if the throttle
position sensor (1st channel) and throttle position sensor (2nd channel)
combination output voltage is outside 4 - 6 V.
3. Refrains from controlling the throttle opening angle feedback if the throttle
position sensor (1st channel) is also defective.
Engine coolant temperature
sensorControls as if the engine coolant temperature is 80_
C. (Moreover, the control system
is working until the ignition switch is turned OFF if the sensor signal returns to normal.)
Camshaft position sensorCuts the fuel supply once a malfunction is detected. (Only when there has been
no occasion of detecting No.1 cylinder top dead centre after the ignition switch
is turned ON.)
Vehicle speed sensor1. Suspends lean burn operation. However, the control is cancelled as a certain
time passes by with the engine speed of 1,500 r/min or more.
2. Suspends lean burn operation during the engine idling.
Barometric pressure sensorControls as if the barometric pressure is 101 kPa.
Detonation sensorFixes the ignition timing as that for regular gasoline.
Injector1. Suspends lean burn operation.
2. Suspends the exhaust gas recirculation.
Ignition coil (incorporating pow-
er transistor)1. Suspends lean burn operation.
2. Cuts off the fuel supply to cylinders with an abnormal ignition signal.
Fuel pressure sensor1. Controls as if the fuel pressure is 5MPa.
2. Suspends fuel injection. (when the low pressure is detected and the engine
speed is more than 3,000r/min)
Alternator FR terminalRefrains from controlling to suppress the alternator output to electrical load.
(Operated as a normal alternator)
Accelerator pedal position sen-
sor (2nd channel)1. Suspends lean burn operation.
2. Controls the throttle valve position by using signals from the accelerator pedal
position sensor (1st channel). (However, the control system is not applicable
if the difference from the accelerator pedal position sensor (1st channel) output
voltage is 1.0V or higher.)
3
. Suspends the electronic controlled throttle valve system if accelerator pedal
position sensor (1st channel) is also defective.


www.WorkshopManuals.co.uk


Purchased from www.WorkshopManuals.co.uk

GDI -Troubleshooting 13A-129
Malfunctioning item Control contents during malfunction
Accelerator pedal position sen-
sor (1st channel)1. Suspends lean burn operation.
2. Controls the throttle valve position by using signals from the accelerator pedal
position sensor (2nd channel). (However, this control is not applicable if the
voltage difference between the accelerator pedal position sensor (1st channel)
and accelerator pedal position sensor (2nd channel) is 1.0 V or higher.)
3. Also suspends the electronic-controlled throttle valve system when the
accelerator pedal position sensor (2nd channel) is defective.
Throttle position sensor (1st
channel)1. Suspends lean burn operation.
2.Controls throttle opening angle feedback by using signals from throttle position
sensor (2nd channel). (However, the controlling system is not applied when
the throttle position sensor (1st channel) and throttle position sensor (2nd
channel) combination output voltage is outside 4 - 6 V.)
3.Refrains from controlling the throttle opening angle feedback when throttle
position sensor (2nd channel) is also defective.
Electronic-controlled throttle
valve system1. Suspends the electronic controlled throttle valve system.
2. Suspends lean burn operation.
3. Suspends the idle speed feedback control.
Throttle valve position feed-
back1. Suspends the electronic controlled throttle valve system.
2. Suspends lean burn operation.
3. Suspends the engine speed feedback control.
However, if the throttle valve opening angle is significantly wide, this system carries
out the following controls.
1. Always cuts the fuel supply to three cylinders.
2. Cuts the fuel supply when the engine speed reaches 3,000 r/min or more.
Throttle control servo1. Suspends the electronic-controlled throttle valve system.
2. Suspends lean burn operation.
3. Suspends the engine speed feedback control.
Communication line between
the throttle valve controller and
the ECU1. Communication error between the throttle valve controller and the
engine-A/T-ECU:
DSuspends lean burn operation.
DCuts the fuel supply when the engine speed reaches 3,000 r/min or
more.
DSuspends the cruise-control.
2. Communication error between the throttle valve controller and the
engine-A/T-ECU:
DSuspends lean burn operation.
DCuts the fuel supply when the engine speed reaches 3,000 r/min or
more.
DSuspends the cruise-control.
DThe throttle valve controller controls the throttle valve opening angle by
using signals from accelerator pedal position sensor (2nd channel).
Throttle valve controller1. Suspends the electronic-controlled throttle valve system.
2. Suspends lean burn operation.
3. Suspends the engine speed feedback control.
NOTE
If the electronic-controlled throttle valve system is suspended, the engine warning lamp will illuminate.


www.WorkshopManuals.co.uk


Purchased from www.WorkshopManuals.co.uk

GDI -Troubleshooting 13A-130
INSPECTION CHART FOR DIAGNOSIS CODES
Code No.Diagnosis itemReference page
11Oxygen sensor system13A-131
12Air flow sensor system13A-133
13Intake air temperature sensor system13A-135
14Throttle position sensor (2nd channel) system13A-137
21Engine coolant temperature sensor system13A-138
22Crank angle sensor system13A-140
23Camshaft position sensor system13A-142
24Vehicle speed sensor system13A-144
25Barometric pressure sensor system13A-145
31Detonation sensor system13A-146
41Injector system13A-147
44Ignition coil (incorporating power transistor) system (for No. 1 and No. 4 cylinders)13A-148
52Ignition coil (incorporating power transistor) system (for No. 2 and No. 5 cylinders)13A-148
53Ignition coil (incorporating power transistor) system (for No. 3 and No. 6 cylinders)13A-148
54Immobilizer system13A-150
56Abnormal fuel pressure system13A-151
64Alternator FR terminal system13A-153
77Accelerator pedal position sensor (2nd channel) system13A-154
78Accelerator pedal position sensor (1st channel) system13A-156
79Throttle position sensor (1st channel) system13A-158
89Abnormality in fuel pressure system13A-160
91Electronic-controlled throttle valve system13A-161
92Throttle valve position feedback system13A-162
93Throttle valve control servo system13A-163
94Communication line system with throttle valve controller13A-164
96Throttle valve controller system13A-165
NOTE
Code No. 56 may be also output when air is sucked in high-pressure fuel line due to no fuel supply.


www.WorkshopManuals.co.uk


Purchased from www.WorkshopManuals.co.uk

GDI -Troubleshooting 13A-147
Code No.41 Injector systemProbable cause
Range of Check
DThe enginespeed is 4,000 r/min or less.
DThe battery voltage is 10 V or more.
DThe fuel cut operation or the injector operation (by carrying out the Actuator
Test) is not in progress.
Set Conditions
DThe injector driver is not transmitting a injectoropencircuit check signal for
four seconds.DMalfunction of injector
DOpen or short circuit in the injector circuit or loose
connector contact
DMalfunction of engine-A/T-ECU
NG
Check the following connector:
B-105NG
Repair
OK
NG
Repair
MUT-
IIActuator Test
01 No.1 injector
02 No.2 injector
03 No.3 injector
04 No.4 injector
05 No.5 injector
06 No.6 injector
OK:
The idling condition should
change.OKCheck the trouble symptoms.OKTransient malfunction
(Refer to GROUP 00 - Points to
Note for Intermittent Malfunctions.)
NG
Replace the injector driver.
Check the trouble symptoms.NGReplace the engine-A/T-ECU.
OK
Measure at intermediate connector
B-105.
DDisconnect the connector and
measure at the harness side.
DResistance between terminals 11
and 12
Resistance between terminals 5
and 6
Resistance between terminals 9
and 10
Resistance between terminals 3
and 4
Resistance between terminals 7
and 8
Resistance between terminals 1
and 2
OK:
0.9 - 1.1WNGCheck the following connectors:
B-117 , B-114 injector>, B-118 ,
B-115 , B-103 injector>, B-104 NG
Repair
OK
Replace the injector.
Check the following connector:
B-121NG
Repair
OK
Check the harness wire between the
injector driver and the intermediate
connector.NG
Repair
OK
Check the following connector:
D-119NG
Repair
OK
Check the harness wire between the
injector driver and the
engine-A/T-ECU.NG
Repair
OK
To the nextpage
Check the harness wire between
injector and the intermediate
connector.
OK


www.WorkshopManuals.co.uk


Purchased from www.WorkshopManuals.co.uk

GDI -Troubleshooting 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


www.WorkshopManuals.co.uk


Purchased from www.WorkshopManuals.co.uk