2005 NISSAN NAVARA engine control

REFRIGERANT PRESSURE SENSOR
EC-325
C
D
E
F
G
H
I
J
K
L
MA
EC
REFRIGERANT PRESSURE SENSORPFP:92136
Component DescriptionEBS01KMG
The refrigerant pressure sensor (1) is installed at the condenser of
the air conditioner system. The sensor uses an electrostatic volume
pressure transducer to convert refrigerant pressure to voltage. The
voltage signal is sent to ECM, and ECM controls cooling fan system.
l: Vehicle front
ECM Terminals and Reference ValueEBS01KMH
Specification data are reference valves, and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may damage the
ECM's transistor. Use a ground other than ECM terminals, such as the ground.
MBIB1224E
PBIB2657E
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
53 W Refrigerant pressure sensor[Engine is running]
lWarm-up condition
lBoth A/C switch and blower switch: ON
(Compressor operates)1.0 - 4.0V
64 VSensor power supply
(Refrigerant pressure sensor)[Ignition switch ON]Approximately 5.3V
72 BRRefrigerant pressure sensor
ground[Engine is running]
lWarm-up condition
lIdle speedApproximately 0.3V

REFRIGERANT PRESSURE SENSOR
EC-327
C
D
E
F
G
H
I
J
K
L
MA
EC
Diagnostic ProcedureEBS01KMJ
1.CHECK REFRIGERANT PRESSURE SENSOR OVERALL FUNCTION
1. Start engine and warm it up to normal operating temperature.
2. Turn A/C switch and blower switch ON.
3. Check voltage between ECM terminal 53 and ground with CON-
SULT-II or tester.
OK or NG
OK >>INSPECTION END
NG >> GO TO 2.
2.CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten three ground screws on the body.
Refer toEC-78, "
Ground Inspection".
OK or NG
OK >> GO TO 3.
NG >> Repair or replace ground connections.Voltage: 1.0 - 4.0V
MBIB1248E
: Vehicle front
1. Body ground E21 2. ECM 3. Body ground E41
4. A/C high-pressure service valve 5. ABS actuator and electric unit
(control unit)6. Body ground E61
MBIB1218E

AUTOMATIC SPEED CONTROL DEVICE (ASCD)
EC-355
C
D
E
F
G
H
I
J
K
L
MA
EC
AUTOMATIC SPEED CONTROL DEVICE (ASCD)PFP:18930
System DescriptionEBS01KN2
INPUT/OUTPUT SIGNAL CHART
*: This signal is sent to the ECM through CAN communication line.
BASIC ASCD SYSTEM
Refer to Owner's Manual for ASCD operating instructions.
Automatic Speed Control Device (ASCD) allows a driver to keep vehicle at predetermined constant speed
without depressing accelerator pedal. Driver can set vehicle speed in advance between approximately 40 km/
h(25MPH)and185km/h(115MPH).
ECM controls fuel injection value to regulate engine speed.
Operation status of ASCD is indicated by CRUISE indicator and SET indicator in combination meter. If any
malfunction occurs in ASCD system, it automatically deactivates control.
SET OPERATION
Press ASCD MAIN switch. (The CRUISE indicator in combination meter illuminates.)
When vehicle speed reaches a desired speed between approximately 40 km/h (25 MPH) and 185 km/h (115
MPH), press SET/COST switch. (Then SET indicator in combination meter illuminates.)
ACCEL OPERATION
If the RESUME/ACCELERATE switch is depressed during cruise control driving, increase the vehicle speed
until the switch is released or vehicle speed reaches maximum speed controlled by the system.
And then ASCD will keep the new set speed.
CANCEL OPERATION
When any of following conditions exist, cruise operation will be canceled.
lCANCEL switch is depressed
lMore than 2 switches at ASCD steering switch are depressed at the same time (Set speed will be cleared)
lBrake pedal is depressed
lClutch pedal is depressed or gear position is changed to the neutral position (M/T models)
lSelector lever is changed to N, P, R position (A/T models)
lVehicle speed decreased to 13 km/h (8 MPH) lower than the set speed
When the ECM detects any of the following conditions, the ECM will cancel the cruise operation and inform
the driver by blinking indicator lamp.
lMalfunction for some self-diagnoses regarding ASCD control: SET lamp will blink quickly.
If MAIN switch is turned to OFF during ASCD is activated, all of ASCD operations will be canceled and vehicle
speed memory will be erased.
COAST OPERATION
When the SET/COAST switch is depressed during cruise control driving, decrease vehicle set speed until the
switch is released. And then ASCD will keep the new set speed.
RESUME OPERATION
When the RESUME/ACCELERATE switch is depressed after cancel operation other than depressing MAIN
switch is performed, vehicle speed will return to last set speed. To resume vehicle set speed, vehicle condition
must meet following conditions.
Sensor Input signal to ECM ECM function Actuator
ASCD brake switch Brake pedal operation
ASCD vehicle speed control Fuel injector and Fuel pump Stop lamp switch Brake pedal operation
ASCD clutch switch (M/T) Clutch pedal operation
ASCD steering switch ASCD steering switch operation
Park/Neutral position (PNP)
switchGear position
Combination meter* Vehicle speed
TCM* Powertrain revolution

SERVICE DATA AND SPECIFICATIONS (SDS)
EC-357
C
D
E
F
G
H
I
J
K
L
MA
EC
SERVICE DATA AND SPECIFICATIONS (SDS)PFP:00100
General SpecificationsEBS01KN4
*: Under the following conditions:
lHeat up switch: OFF
lAir conditioner switch: OFF
lElectric load: OFF (Lights, heater fan & rear window defogger)
lSteering wheel: Kept in straight-ahead position
Mass Air Flow SensorEBS01KN5
*: Engine is warmed up to normal operating temperature and running under no load.
Intake Air Temperature SensorEBS01KN6
Engine Coolant Temperature SensorEBS01KN7
Fuel Rail Pressure SensorEBS01KN8
Fuel InjectorEBS01KN9
Glow PlugEBS01KNA
EGR Volume Control ValveEBS01KNB
Crankshaft Position SensorEBS01KNC
Refer toEC-164, "Component Inspection".
Camshaft Position SensorEBS01KND
Refer toEC-175, "Component Inspection".
Target idle speedA/T No load* (in P or N position)
750±25 rpm
M/T No load* (in Neutral position)
Air conditioner: ONA/T In P or N position 750 rpm or more
M/T In Neutral position 800 rpm or more
Maximum engine speed4,900 rpm
Supply voltageBattery voltage (11 - 14V)
Ignition switch ON (Engine stopped.) Approx. 0.4V
Idle (Engine is warmed up to normal operating temperature.) 1.3 - 1.7V *
Temperature°C(°F) Resistance kW
25 (77)1.800 - 2.200
80 (176)0.283 - 0.359
Temperature°C(°F) Resistance kW
20 (68)2.1 - 2.9
50 (122)0.68 - 1.00
90 (194)0.236 - 0.260
Supply voltageApproximately 5V
Idle (Engine is warmed up to normal operating temperature.) 1.7 - 2.0V
2,000 rpm (Engine is warmed up to normal operating tempera-
ture.)2.0 - 2.3V
Resistance [at 10 - 60°C (50 - 140°F)] 0.2 - 0.8W
Resistance [at 25°C(77°F)] Approximately 0.8W
Resistance [at 25°C(77°F)] 13 - 17W

INTAKE MANIFOLD
EM-21
C
D
E
F
G
H
I
J
K
L
MA
EM
lRefer toGI-10, "Components"for symbol marks except in the above.
Removal and InstallationEBS01EJF
REMOVAL
WARNING:
To avoid the danger of being scalded, do not drain engine coolant when engine is hot.
1. Drain engine coolant. Refer toCO-7, "
Changing Engine Coolant".
2. Remove engine cover (1).
CAUTION:
Be careful not to damage engine cover surface.
3. Disconnect air inlet hose from throttle chamber. Refer toEM-18, "
CHARGE AIR COOLER".
4. Remove fuel filter. Refer toFL-4, "
FUEL FILTER".
5. Remove oil level gauge guide. Refer toEM-36, "
OIL PAN AND OIL STRAINER".
6. Remove fuel hoses and fuel gallery. Refer toEM-44, "
INJECTION TUBE AND FUEL INJECTOR".
lTo prevent fuel from flowing out, plug the opening of the hose with plug after disconnection.
CAUTION:
Be careful not to spill fuel in the engine component.
lAdd marks as necessary for easier installation.
7. Remove vacuum galleries and vacuum hoses.
lAdd marks as necessary for easier installation.
8. Disconnect EGR volume control valve water hoses and wiring harness.
9. Disconnect heater feed hose, water hoses, and remove heater feed pipe.
10. Remove EGR cooler (A/T models) or EGR tube (M/T models).
11. Remove injection tube center. Refer toEM-44, "
Removal and Installation".
CAUTION:
Be careful not to spill fuel in the engine component.
12. Remove water pipe.
1. Vacuum hose 2. Vacuum gallery 3. Vacuum hose
4. Bracket 5. Bracket 6. Gasket
7. Bracket 8. Intake manifold 9. Water hose
10. Heater feed pipe (M/T models) 11. O-ring 12. Vacuum hose
13. Vacuum gallery 14. Vacuum hose 15. Gasket
16. Throttle chamber 17. Gasket 18. Gasket
19. EGR passage 20. Gasket 21. Bracket
22. EGR volume control valve 23. Vacuum gallery 24. Bracket
25. Washer 26. Gasket 27. EGR tube (M/T models)
28. Water hose 29. Water hose 30. Clip (A/T models)
31. Water hose (A/T models) 32. Heater feed pipe (A/T models) 33. Water hose (A/T models)
34. EGR cooler (A/T models) 35. Gasket (A/T models) 36. EGR tube (A/T models)
37. Bracket (A/T models)
C. To heater return pipe E. To cylinder head F. To water outlet
G. To exhaust manifold H. To air inlet hose
Vehicle front
PBIC3409E

EM-22
INTAKE MANIFOLD
13. Loosen bolts and nuts in the reverse order of that shown in the
figure, and remove intake manifold.
CAUTION:
Cover engine openings to avoid entry of foreign materials.
14. Remove EGR volume control valve and throttle chamber from intake manifold.
INSPECTION AFTER REMOVAL
Surface Distortion
lCheck distortion on the mounting surface with a straightedge
and feeler gauge.
lIf it exceeds the limit, replace intake manifold.
INSTALLATION
Note the following, and install in the reverse order of removal.
lInstall intake manifold.
–Tighten fixing bolts and nuts in numerical order as shown in the
figure.
–If stud bolts were removed, tighten them to the specified torque.
lInstall EGR tube (M/T models).
–Tighten fixing bolts and nuts in numerical order as shown in the figure.
PBIC3410E
Limit : 0.1 mm (0.004 in)
PBIC3411E
: 10.8 N·m (1.1 kg-m, 8 ft-lb)
PBIC3410E

TURBO CHARGER
EM-29
C
D
E
F
G
H
I
J
K
L
MA
EM
lRefer toGI-10, "Components"for symbol marks in the figure.
Removal and InstallationEBS01E5X
REMOVAL
lAfter applying penetrative lubricant to the mounting nuts, check for the penetration of the lubricant, and
then loosen the nuts to remove.
1. Drain engine coolant (4WD models). Refer toCO-7, "
Changing Engine Coolant".
2. Remove air inlet hose and air inlet pipe. Refer toEM-18, "
CHARGE AIR COOLER".
3. Remove air duct and air inlet pipes. Refer toEM-15, "
AIR CLEANER AND AIR DUCT".
4. Remove exhaust manifold cover. Refer toEM-34, "
EXHAUST MANIFOLD".
5. Remove exhaust outlet and catalyst. Refer toEM-26, "
CATALYST".
6. Remove eye bolt and water hose from water tube (4WD models).
7. Loosen and remove eye-bolts from oil feed tube.
8. Disconnect oil return hose from oil return tube.
9. Remove turbocharger with water tube (4WD models) and oil feed tube and oil return tube.
CAUTION:
Be careful not to deform water tube and oil feed tube and oil return tube.
10. Remove water tube (4WD models) and oil feed tube and oil return tube from turbocharger.
CAUTION:
lDo not disassemble or adjust the turbocharger.
lBe careful not to contact with the vehicle.
lDo not hold turbocharger boost control actuator and actuator rod.
Water Tube and Oil Tube
lClean inside of water tube (4WD models), oil feed tube and oil return tube, and check tubes for clogging.
lReplace water tube (4WD models), oil feed tube and/or oil return tube if clogging still exists after cleaning.
28. Oil return tube (2WD models)
A. To heater return pipe B. To cylinder block

EM-30
TURBO CHARGER
INSPECTION AFTER REMOVAL
2WD Models
4WD Models
CAUTION:
When the compressor wheel turbine, wheel or rotor shaft is damaged, remove all the fragments and
foreign matter left in the following passages in order to prevent a secondary malfunction:
PBIC4101E
1. Compressor housing 2. Turbocharger boost control actuator 3. Turbine housing
A. Check for charge air pressure leaks B. Check for exhaust gas leaks C.Check for negative air pressure
leaks
D. Check for engine oil leaks
PBIC3416E
1. Compressor housing 2. Turbocharger boost control actuator 3. Turbine housing
A. Check for charge air pressure leaks B. Check for exhaust gas leaks C.Check for negative air pressure
leaks
D. Check for engine coolant leaks E. Check for engine oil leaks
Suction side : Between turbocharger and charge air cooler
Exhaust side : Between turbocharger and catalyst