2005 NISSAN NAVARA Repair Workshop Manual

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Page 993 of 3171

NISSAN NAVARA 2005 Repair Workshop Manual PRECAUTIONS
EC-13
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Wiring Diagrams and Trouble DiagnosisEBS01KC8
When you read Wiring diagrams, refer to the following:
lGI-15, "How to Read Wiring Diagrams".
lPG-4, "POWER SU

Page 994 of 3171

NISSAN NAVARA 2005 Repair Workshop Manual EC-14
PREPARATION
PREPARATION
PFP:00002
Special Service ToolsEBS01KC9
Commercial Service ToolsEBS01KCA
Tool number
Tool nameDescription
EG17650301
Radiator cap tester
adapterAdapting radiator cap test

Page 995 of 3171

NISSAN NAVARA 2005 Repair Workshop Manual ENGINE CONTROL SYSTEM
EC-15
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ENGINE CONTROL SYSTEMPFP:23710
System DiagramEBS01KCB
MBIB1287E

Page 996 of 3171

NISSAN NAVARA 2005 Repair Workshop Manual EC-16
ENGINE CONTROL SYSTEM
Vacuum Hose Drawing
EBS01KCC
LEFT SIDE OF THE ENGINE ROOM
Refer toEC-15, "System Diagram"for Vacuum Control System.
MBIB1387E
: Vehicle front
1. Turbocharger boost control

Page 997 of 3171

NISSAN NAVARA 2005 Repair Workshop Manual ENGINE CONTROL SYSTEM
EC-17
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RIGHT SIDE OF THE ENGINE ROOM
Refer toEC-15, "System Diagram"for Vacuum Control System.
MBIB1288E
: Vehicle front
1. Fuel rail 2. Intake air contr

Page 998 of 3171

NISSAN NAVARA 2005 Repair Workshop Manual EC-18
ENGINE CONTROL SYSTEM
System Chart
EBS01KCD
*1: The input signal is sent to the ECM through CAN communication line.
*2: The output signal is sent from the ECM through CAN communication line.
Fue

EC-18
ENGINE CONTROL SYSTEM
System Chart
EBS01KCD
*1: The input signal is sent to the ECM through CAN communication line.
*2: The output signal is sent from the ECM through CAN communication line.
Fuel Injection Control SystemEBS01KCE
SYSTEM DESCRIPTION
Three types of fuel injection control are provided to accommodate engine operating conditions; normal control,
idle control and start control. The ECM determines the appropriate fuel injection control. Under each control,
the amount of fuel injected is adjusted to improve engine performance.
Pulse signals are sent to fuel injectors according to the input signals to adjust the amount of fuel injected to
preset value.
START CONTROL
Input/Output Signal Chart
Input (Sensor) ECM Function Output (Actuator)
lAccelerator pedal position sensor
lFuel rail pressure sensor
lFuel pump temperature sensor
lEngine coolant temperature sensor
lMass air flow sensor
lIntake air temperature sensor
lCrankshaft position sensor
lCamshaft position sensor
lTurbocharger boost sensor
lWheel sensor*1
lIgnition switch
lASCD steering switch
lASCD brake switch
lASCD clutch switch
lSt o p l a m p s w it c h
lAir conditioner switch*1
lFront air control*1
lPark/neutral position switch
lHeat up switch
lRefrigerant pressure sensor
lBattery voltageFuel injection control Fuel injector and Fuel pump
Fuel injection timing control Fuel injector and Fuel pump
Fuel cut control Fuel injector and Fuel pump
Glow control system
Glow relay and glow indicator lamp*
2
ASCD vehicle speed control Fuel injector and Fuel pump
On board diagnostic system
Malfunction indicator (MI)*
2
EGR volume control EGR volume control valve
Cooling fan control
Cooling fan relay*
2
Turbocharger boost controlTurbocharger boost control solenoid
valve
Intake air control valve controlIntake air control valve control solenoid
valve
Air conditioning cut control
Air conditioner relay*
2
Sensor Input Signal to ECM ECM Function Actuator
Engine coolant temperature sensor Engine coolant temperature
Fuel injection
control (start
control)Fuel injector
Fuel pump Crankshaft position sensor Engine speed
Camshaft position sensor Piston position
Ignition switch Start signal
Fuel rail pressure sensor Fuel rail pressure

Page 999 of 3171

NISSAN NAVARA 2005 Repair Workshop Manual ENGINE CONTROL SYSTEM
EC-19
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When the ECM receives a start signal from the ignition switch, the
ECM adapts the fuel injection system for the start control. The
amount of fuel

ENGINE CONTROL SYSTEM
EC-19
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When the ECM receives a start signal from the ignition switch, the
ECM adapts the fuel injection system for the start control. The
amount of fuel injected at engine starting is a preset program value
in the ECM. The program is determined by the engine speed, engine
coolant temperature and fuel rail pressure.
For better startability under cool engine conditions, the lower the
coolant temperature becomes, the greater the amount of fuel
injected. The ECM ends the start control when the engine speed
reaches the specific value, and shifts the control to the normal or idle
control.
IDLE CONTROL
Input/Output Signal Chart
*: The input signal is sent to the ECM through CAN communication line.
When the ECM determines that the engine speed is at idle, the fuel injection system is adapted for the idle
control. The ECM regulates the amount of fuel injected corresponding to changes in load applied to the engine
to keep engine speed constant. The ECM also provides the system with a fast idle control in response to the
engine coolant temperature signal.
NORMAL CONTROL
Input/Output Signal Chart
The amount of fuel injected under normal driving conditions is deter-
mined according to sensor signals. The crankshaft position sensor
detects engine speed, the accelerator pedal position sensor detects
accelerator pedal position and fuel rail pressure sensor detects fuel
rail pressure. These sensors send signals to the ECM.
The fuel injection data, predetermined by correlation between vari-
ous engine speeds, accelerator pedal positions and fuel rail pres-
sure are stored in the ECM memory, forming a map. The ECM
determines the optimal amount of fuel to be injected using the sen-
sor signals in comparison with the map.
SEF648S
Sensor Input Signal to ECM ECM Function Actuator
Engine coolant temperature sensor Engine coolant temperature
Fuel injection
control (idle
control)Fuel injector
Fuel pump Crankshaft position sensor Engine speed
Battery Battery voltage
Accelerator pedal position sensor Accelerator pedal position
Fuel rail pressure sensor Fuel rail pressure
Wheel sensor Vehicle speed*
Air conditioner switch Air conditioner ON signal*
Front air control PTC heater ON signal*
Heat up switch Heat up switch signal
Sensor Input Signal to ECM ECM Function Actuator
Crankshaft position sensor Engine speed
Fuel injection
control (normal
control)Fuel injector
Fuel pump Accelerator pedal position sensor Accelerator position
Fuel rail pressure sensor Fuel rail pressure
SEF649S

Page 1000 of 3171

NISSAN NAVARA 2005 Repair Workshop Manual EC-20
ENGINE CONTROL SYSTEM
MAXIMUM AMOUNT CONTROL
Input/Output Signal Chart
The maximum injection amount is controlled to an optimum by the engine speed, intake air amount, engine
coolant temperature

EC-20
ENGINE CONTROL SYSTEM
MAXIMUM AMOUNT CONTROL
Input/Output Signal Chart
The maximum injection amount is controlled to an optimum by the engine speed, intake air amount, engine
coolant temperature, and accelerator opening in accordance with the driving conditions.
This prevents the oversupply of the injection amount caused by decreased air density at a high altitude or dur-
ing a system failure.
DECELERATION CONTROL
Input/Output Signal Chart
The ECM sends a fuel cut signal to the fuel injectors and fuel pump during deceleration for better fuel effi-
ciency. The ECM determines the time of deceleration according to signals from the accelerator pedal position
sensor and crankshaft position sensor.
Fuel Injection Timing Control SystemEBS01KCF
DESCRIPTION
The target fuel injection timing in accordance with the engine speed and the fuel injection amount are recorded
as a map in the ECM beforehand. The ECM determines the optimum injection timing using sensor signals
accordance with the map.
Air Conditioning Cut ControlEBS01KCG
INPUT / OUTPUT SIGNAL CHART
*1: The input signal is sent to the ECM through CAN communication line.
*2: The output signal is sent from the ECM through CAN communication line.
SYSTEM DESCRIPTION
This system improves acceleration when the air conditioner is used.
When the accelerator pedal is fully depressed, the air conditioner is turned off for a few seconds.
When engine coolant temperature becomes excessively high, the air conditioner is turned off. This continues
until the engine coolant temperature returns to normal.
Fuel Cut Control (At No Load & High Engine Speed)EBS01KCH
INPUT/OUTPUT SIGNAL CHART
*: The input signal is sent to the ECM through CAN communication line.Sensor Input Signal to ECM ECM Function Actuator
Mass air flow sensor Amount of intake air
Fuel injection
control (maxi-
mum amount
control)Fuel injector Engine coolant temperature sensor Engine coolant temperature
Crankshaft position sensor Engine speed
Accelerator pedal position sensor Accelerator pedal position
Sensor Input Signal to ECM ECM Function Actuator
Accelerator pedal position sensor Accelerator pedal position Fuel injection
control (decel-
eration control)Fuel injector
Fuel pump
Crankshaft position sensor Engine speed
Sensor Input Signal to ECM ECM Function Actuator
Air conditioner switch
Air conditioner ON signal*
1
Air conditioner
cut controlAir conditioner relay*2
Accelerator pedal position sensor Accelerator pedal opening angle
Wheel sensor
Vehicle speed*
1
Engine coolant temperature sensor Engine coolant temperature
Refrigerant pressure sensor Refrigerant pressure
Sensor Input Signal to ECM ECM Function Actuator
Wheel sensor Vehicle speed*
Fuel cut control Fuel injector Accelerator pedal position sensor Accelerator pedal position
Crankshaft position sensor Engine speed

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