2000 MITSUBISHI MONTERO coolant level
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GDI -General Information13A-3
GENERAL INFORMATION
The Gasoline Direct Injection System consists
of sensors which detect the engine conditions,
the engine-ECU
which controls the system based on
signals from these sensors, and actuators
which operate under the control of the
engine-ECU
carries out activities such as fuel injection
control, idle speed control and ignition timing
control. In addition, the engine-ECU
engine-A/T-ECU is equipped with several
diagnosis modes which simplify troubleshooting
when a problem develops.
FUEL INJECTION CONTROL
The injector drive times and injector timing are
controlled so that the optimum air/fuel mixture
is supplied to the engine to correspond to the
continually-changing engine operation condi-
tions.
A single injector for each cylinder is mounted
at the cylinder head. The fuel is sent under
pressure from the fuel tank to the fuel pressure
regulator (low pressure) by the fuel pump (low
pressure). The pressure is regulated by the
fuel pressure regulator (low pressure) and the
fuel regulated is then sent to the fuel pump
(high pressure). The fuel under increased
pressure generated by the fuel pump (high
pressure) is then regulated by the fuel pressure
regulator (high pressure) and is then distributed
to each of the injectors via the delivery pipes.Fuel injection is normally carried out once for
each cylinder for every two rotations of the
crankshaft. The firing order is 1-2-3-4-5-6. This
is called sequential fuel injection.
When the engine is cold or under a severe
load, the “open-loop” control keeps the air/fuel
ratio at a richer than usual level to maintain
driveability. When the engine is under low or
medium loads, the air/fuel ratio becomes leaner
to reduce fuel consumption. When the engine
is running at medium or high loads after having
warmed up, the “closed-loop” control uses the
signal from the oxygen sensor to keep the
air/fuel ratio at the optimum theoretical level.
THROTTLE VALVE OPENING ANGLE CONTROL
This system controls throttle valve opening
angle electronically. The engine-ECU
or engine-A/T-ECU determines how
deeply the accelerator pedal is depressed by
means of the accelerator position sensor (APS).
Then the engine-ECU
throttle valve opening angle to the throttle valve
controller. The throttle valve control servo
operates the throttle valve so that it reaches
the target opening angle.
IDLE SPEED CONTROL
This system maintains engine idle speed at
a predetermined condition by controlling the
air flow that passes through the throttle valve
according to engine idling condition and engine
loads at idling.
The engine-ECU
operates the throttle valve control servoso that engine speed is maintained within a
map value. The map value is predetermined
according to engine coolant temperature and
air-conditioning load.
IGNITION TIMING CONTROL
The power transistor located in the ignition
primary circuit turns ON and OFF to control
the primary current flow to the ignition coil. This
controls the ignition timing in order to provide
the optimum ignition timing with respect to the
engine operating conditions. The ignition timingis determined by the engine-ECU
engine-A/T-ECU from the engine speed,
intake air volume, engine coolant temperature,
atmospheric pressure and injection timing
(intake stroke or compression stroke).
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Page 242 of 1839
GDI -Troubleshooting
Code No.P0130 Oxygen sensor (front) system
Range of Check
DThree minutes havebeenpassed since theengine has been started.
DThe engine coolant temperature is approx. 80_C or more.
DIntake air temperature is 20 - 50_C
DEngine speed is 1,200 r/min or more
DDriving on a level surface at constant speed.
Set Conditions
DThe oxygen sensor (front) output voltage is 4.5 V or more when the sensor
output voltage is 0.2 V or less and a voltage of 5 V isapplied to theoxygen
sensor (front) inside the engine-ECU.DMalfunction of oxygen sensor (front)
DOpen or short circuit in the oxygen sensor (front)
circuit or loose connector contact
DMalfunction of engine-ECU
Range of Check
DEngine speed is 3,000 r/min or less
DDuring driving
DDuring air/fuel ratio feedback control
Set Conditions
DThe oxygen sensor (front) output frequency is five or less per 12 seconds on
average.
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GDI -Troubleshooting
Code No.P0136 Oxygen sensor (rear) system
Range of Check
DThree minutes havebeenpassed since theengine has been started.
DThe engine coolant temperature is approx. 80_C or more.
DIntake air temperature is 20 - 50_C
DEngine speed is 1,200 r/min or more
DDriving on a level surface at constant speed.
Set Conditions
DThe oxygen sensor (rear) output voltage is 4.5 V or more when the sensor
output voltage is 0.2 V or less and a voltage of 5 V isapplied to theoxygen
sensor (rear) inside the engine-ECU.DMalfunction of oxygen sensor (rear)
DOpen or short circuit in the oxygen sensor (rear)
circuit or loose connector contact
DMalfunction of engine-ECU
Range of Check
DTwo seconds have passed after the ECU detected anopencircuit.
DWhen the oxygen sensor (front) is ingood condition.
Set Conditions
DWhen the air/fuel ratio is rich, the oxygen sensor (front) output voltage is 0.5
V or more, the oxygen sensor (rear) output voltage is less than 0.1 V, and
the oxygen sensor (rear) output voltage fluctuates within 0.078 V.
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Page 345 of 1839
Page 1572 of 1839
54A-2
CHASSIS
ELECTRICAL
CONTENTS
BATTERY 4
..............................
SERVICE SPECIFICATIONS 4..................
ON-VEHICLE SERVICE 4......................
Electrolyte Level and Specific Gravity Check 4..
Charging 5.................................
Battery Test 5...............................
IGNITION SWITCH AND IMMOBILIZER
SPECIAL TOOLS 6............................
TROUBLESHOOTING 6........................
IGNITION SWITCH AND
IMMOBILIZER-ECU 11.........................
IGNITION SWITCH AND IMMOBILIZER
<4D56> 14...............................
SPECIAL TOOLS 14...........................
TROUBLESHOOTING 14.......................
IGNITION SWITCH AND IMMOBILIZER-ECU
19 ............................................
COMBINATION METER 23................
SERVICE SPECIFICATIONS 23.................
SEALANTS 24................................
SPECIAL TOOLS 24...........................
TROUBLESHOOTING 24.......................
ON-VEHICLE SERVICE 30.....................
Speedometer Check 30......................
Tachometer Check 30........................
Fuel Gauge Unit Check 31....................Engine Coolant Temperature Gauge Unit Check
32 .........................................
COMBINATION METER 33.....................
HEADLAMP ASSEMBLY 36...............
SERVICE SPECIFICATIONS 36.................
SPECIAL TOOLS 36...........................
TROUBLESHOOTING 36.......................
ON-VEHICLE SERVICE 36.....................
Headlamp Aiming Adjustment 36..............
Luminance Measurement 38..................
Headlamp Bulb Replacement 39...............
HEADLAMP ASSEMBLY 40....................
FOG LAMPS 41..........................
SERVICE SPECIFICATIONS 41.................
SPECIAL TOOLS 41...........................
TROUBLESHOOTING 41.......................
ON-VEHICLE SERVICE 41.....................
Fog Lamp Aiming Check 41...................
FOG LAMPS 44...............................
SIDE TURN-SIGNAL LAMPS 45...........
SPECIAL TOOLS 45...........................
SIDE TURN-SIGNAL LAMPS 46................
ROOM LAMP 46.........................
TROUBLESHOOTING 46.......................
CONTINUED ON NEXT PAGE
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Page 1748 of 1839
55A-2
HEATER, AIR
CONDITIONER AND
VENTILATION
CONTENTS
SERVICE SPECIFICATIONS 3.................
LUBRICANTS 3..............................
TROUBLESHOOTING
TROUBLESHOOTING
ON-VEHICLE SERVICE 9.....................
Refrigerant Level Test through Performance Test 9.
Magnetic Clutch Test 10.........................
Receiver Drier Test 10..........................
Compressor Drive Belt Adjustment 10.............
Dual Pressure Switch Check 10..................
Charging 11...................................
Performance Test 15............................
Front Blower Relay and Rear Blower Relay
Continuity Check 18............................
Continuity Check of A/C Compressor Relay and
Condernser Fan Relay 18.......................
PTC Heater Relay Continuity Check 19...........
Idle-up Operation Check
Vacuum Actuator Check
Idle-up Solenoid Valve Check 21.................
Clean Air Filter Replacement Procedure 22........
FRONT A/C 23..............................
Air Conditioner Control Panel Assembly and
A/C Switch 23.................................
Heater Unit and Blower Assembly 26.............
Blower Motor and Resistor 29....................
Inside/Outside Air Changeover Damper Motor 30...
Automatic Compressor-ECU and
Air Thermo Sensor Assembly 31.................
REAR HEATER AND REAR COOLER 32.....
Rear A/C Switch, Front Rear Fan Switch 32.......
Rear A/C Control Unit 34........................
Rear Heater Unit 34............................
Rear Heater Unit and Rear Blower Assembly 37....
HEAT SWITCH 40...........................
COMPRESSOR 41...........................
CONDENSER ASSEMBLY AND
CONDENSER FAN 45........................
REFRIGERANT LINE 47.....................
ENGINE COOLANT TEMPERATURE SWITCH
51 ..........................................
IDLE-UP SYSTEM 53........................
DUCTS 54..................................
VENTILATION 56............................
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