2005 NISSAN NAVARA fuel system

EC-5
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ECA . 303
ECM Terminals and Reference Value .................. 303
Wiring Diagram .................................................... 304
Diagnostic Procedure ........................................... 305
Component Inspection ......................................... 307
Removal and Installation ...................................... 308
TC BOOST CONTROL SOLENOID VALVE ........... 309
Description ........................................................... 309
ECM Terminals and Reference Value .................. 310
Wiring Diagram ..................................................... 311
Diagnostic Procedure ........................................... 312
Component Inspection ......................................... 313
Removal and Installation ...................................... 313
INTAKE AIR CONTROL VALVE CONTROL SOLE-
NOID VALVE ........................................................... 314
Description ........................................................... 314
ECM Terminals and Reference Value .................. 314
Wiring Diagram .................................................... 315
Diagnostic Procedure ........................................... 316
Component Inspection ......................................... 318
HEAT UP SWITCH .................................................. 319
Description ........................................................... 319
CONSULT-II Reference Value in Data Monitor Mode
. 319
ECM Terminals and Reference Value .................. 319
Wiring Diagram .................................................... 320
Diagnostic Procedure ........................................... 321
Component Inspection ......................................... 324
REFRIGERANT PRESSURE SENSOR ................. 325
Component Description ........................................ 325
ECM Terminals and Reference Value .................. 325
Wiring Diagram .................................................... 326
Diagnostic Procedure ........................................... 327
Removal and Installation ...................................... 329
BRAKE SWITCH .................................................... 330
Description ........................................................... 330
CONSULT-II Reference Value in Data Monitor Mode.330
ECM Terminals and Reference Value ...................330
Wiring Diagram .....................................................331
Diagnostic Procedure ...........................................332
Component Inspection ..........................................341
PNP SWITCH ..........................................................342
Description ............................................................342
CONSULT-II Reference Value in Data Monitor Mode
.342
ECM Terminals and Reference Value ...................342
Wiring Diagram .....................................................343
Diagnostic Procedure ...........................................344
START SIGNAL ......................................................348
Wiring Diagram .....................................................348
Diagnostic Procedure ...........................................349
ASCD INDICATOR ..................................................351
Component Description ........................................351
Wiring Diagram .....................................................352
Diagnostic Procedure ...........................................353
MI & DATA LINK CONNECTORS ...........................354
Wiring Diagram .....................................................354
AUTOMATIC SPEED CONTROL DEVICE (ASCD). 355
System Description ...............................................355
Component Description ........................................356
SERVICE DATA AND SPECIFICATIONS (SDS) ....357
General Specifications ..........................................357
Mass Air Flow Sensor ...........................................357
Intake Air Temperature Sensor .............................357
Engine Coolant Temperature Sensor ...................357
Fuel Rail Pressure Sensor ....................................357
Fuel Injector ..........................................................357
Glow Plug .............................................................357
EGR Volume Control Valve ..................................357
Crankshaft Position Sensor ..................................357
Camshaft Position Sensor ....................................357
Fuel Pump ............................................................358

EC-6
INDEX FOR DTC
INDEX FOR DTC
PFP:00024
DTC No. IndexEBS01KC3
NOTE:
If DTC U1000 is displayed with other DTC, first perform the trouble diagnosis for DTC U1000. Refer to
EC-79, "
DTC U1000 CAN COMMUNICATION LINE".
X: Applicable —: Not applicable
DTC
Items
(CONSULT-II screen item)MI lighting up Reference page
CONSULT-II*
1ECM*2
U1000
1000*3CAN COMM CIRCUIT —EC-79
P0000 0000NO DTC IS DETECTED.
FURTHER TESTING
MAY BE REQUIRED.——
P0016 0016 CMP/CKP RELATION —EC-82
P0088 0088 HIGH FUEL PRESS´EC-84
P0089 0089 FUEL PUMP —EC-86
P0093 0093 FUEL LEAK´EC-88
P0102 0102 MAF SEN/CIRCUIT —EC-92
P0103 0103 MAF SEN/CIRCUIT —EC-92
P0112 0112 IAT SEN/CIRCUIT —EC-98
P0113 0113 IAT SEN/CIRCUIT —EC-98
P0117 0117 ECT SEN/CIRCUIT —EC-103
P0118 0118 ECT SEN/CIRCUIT —EC-103
P0122 0122 APP SEN 1/CIRCUIT —EC-108
P0123 0123 APP SEN 1/CIRCUIT —EC-108
P0182 0182 FUEL TEMP SEN/CIRC —EC-113
P0183 0183 FUEL TEMP SEN/CIRC —EC-113
P0192 0192 FRP SEN/CIRC —EC-118
P0193 0193 FRP SEN/CIRC —EC-118
P0200 0200 INJECTOR´EC-123
P0201 0201 CYL1 INJECTOR´EC-125
P0202 0202 CYL2 INJECTOR´EC-125
P0203 0203 CYL3 INJECTOR´EC-125
P0204 0204 CYL4 INJECTOR´EC-125
P0217 0217 ENG OVER TEMP´EC-132
P0222 0222 APP SEN 2/CIRCUIT —EC-142
P0223 0223 APP SEN 2/CIRCUIT —EC-142
P0234 0234 TC SYSTEM —EC-147
P0237 0237 TC BOOST SEN/CIRC —EC-153
P0238 0238 TC BOOST SEN/CIRC —EC-153
P0335 0335 CKP SEN/CIRCUIT´EC-159
P0336 0336 CKP SENSOR´EC-165
P0340 0340 CMP SEN/CIRCUIT´EC-171
P0341 0341 CMP SENSOR´EC-177
P0501 0501 VEHICLE SPEED —EC-183
P0502 0502 VEHICLE SPEED —EC-185
P0503 0503 VEHICLE SPEED —EC-187

EC-10
PRECAUTIONS
PRECAUTIONS
PFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
EBS01KC5
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. Information necessary to service the system safely is included in the SRS and SB section of
this Service Manual.
WARNING:
lTo avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance must be per-
formed by an authorized NISSAN/INFINITI dealer.
lImproper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the SRS section.
lDo not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or
harness connectors.
On Board Diagnostic (OBD) System of EngineEBS01KC6
The ECM has an on board diagnostic system. It will light up the malfunction indicator (MI) to warn the driver of
a malfunction causing emission deterioration.
CAUTION:
lBe sure to turn the ignition switch OFF and disconnect the battery negative cable before any
repair or inspection work. The open/short circuit of related switches, sensors, solenoid valves,
etc. will cause the MI to light up.
lBe sure to connect and lock the connectors securely after work. A loose (unlocked) connector will
cause the MI to light up due to the open circuit. (Be sure the connector is free from water, grease,
dirt, bent terminals, etc.)
lCertain systems and components, especially those related to OBD, may use a new style slide-
locking type harness connector. For description and how to disconnect, refer toPG-75, "
HAR-
NESS CONNECTOR".
lBe sure to route and secure the harnesses properly after work. The interference of the harness
with a bracket, etc. may cause the MI to light up due to the short circuit.
lBe sure to connect rubber tubes properly after work. A misconnected or disconnected rubber tube
may cause the MI to light up due to the malfunction of the fuel system, etc.
lBe sure to erase the unnecessary malfunction information (repairs completed) from the ECM
before returning the vehicle to the customer.
PrecautionsEBS01KC7
lAlways use a 12 volt battery as power source.
lDo not attempt to disconnect battery cables while engine is
running.
lBefore connecting or disconnecting the ECM harness con-
nector, turn ignition switch OFF and disconnect battery
negative cable. Failure to do so may damage the ECM
because battery voltage is applied to ECM even if ignition
switch is turned off.
lBefore removing parts, turn ignition switch OFF and then
disconnect battery negative cable.
SEF289H

EC-12
PRECAUTIONS
lAfter performing each TROUBLE DIAGNOSIS, perform DTC
Confirmation Procedure or Overall Function Check.
The DTC should not be displayed in the DTC Confirmation
Procedure if the repair is completed. The Overall Function
Check should be a good result if the repair is completed.
lWhen measuring ECM signals with a circuit tester, never
allow the two tester probes to contact.
Accidental contact of probes will cause a short circuit and
damage the ECM power transistor.
lDo not use ECM ground terminals when measuring input/
output voltage. Doing so may result in damage to the ECM's
transistor. Use a ground other than ECM terminals, such as
the ground.
lDo not disassemble fuel pump.
If NG, take proper action.
lDo not disassemble fuel injector.
If NG, replace fuel injector.
lDo not depress accelerator pedal when staring.
lImmediately after staring, do not rev up engine unnecessar-
ily.
lDo not rev up engine just prior to shutdown.
lWhen installing C.B. ham radio or a mobile phone, be sure
to observe the following as it may adversely affect elec-
tronic control systems depending on installation location.
–Keep the antenna as far as possible from the electronic
control units.
–Keep the antenna feeder line more than 20 cm (8 in) away
from the harness of electronic controls.
Do not let them run parallel for a long distance.
–Adjust the antenna and feeder line so that the standingwave
radio can be kept smaller.
–Be sure to ground the radio to vehicle body.
SAT652J
SEF348N
SEF709Y
SEF708Y

ENGINE CONTROL SYSTEM
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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 control valve control
solenoid valve3. Vacuum pump
4. Intake air control valve actuator A. To previous page
NOTE: Do not use soapy water or any type of solvent while installing vacuum hose.

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

ENGINE CONTROL SYSTEM
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EC
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

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