Nissan X-Trail 32. Manual — part 922
COMPONENT PARTS
EC-817
< SYSTEM DESCRIPTION >
[R9M]
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<Reference data>
Turbocharger Boost Sensor
INFOID:0000000010935510
The turbocharger boost sensor detects pressure in the charge air cooler outlet area. The sensor send to volt-
age signal to the ECM. As the pressure increases, the voltage rises.
Intake Air Temperature Sensor 2
INFOID:0000000010935511
The Intake Air Temperature (IAT) Sensor 2 is built-into the Turbocharger Boost Pressure Sensor. The sensor
detects intake air temperature and transmits a signal to the ECM.
<Reference data>
Air Fuel Ratio (A/F) Sensor
INFOID:0000000010935512
Air fuel ratio (A/F) sensor is installed on the upstream of the oxidation catalyst. A/F sensor measures the oxy-
gen level in the exhaust gas and converts it into a voltage signal. A/F sensor sends the signal to ECM. Based
on the signal from A/F sensor, ECM calculates the air fuel mixture ratio. ECM uses the calculated ratio for the
DPF (Diesel Particulate Filter) regeneration control.
A heater is integrated in A/F sensor to ensure the required operating temperature.
Engine Coolant Temperature Sensor
INFOID:0000000010935513
The engine coolant temperature (ECT) sensor is used to detect the engine coolant temperature.
<Reference data>
High Pressure Fuel Pump
INFOID:0000000010935514
High Pressure Fuel Pump is operated by high pressure fuel pump drive pinion, installed at camshaft. The high
pressure fuel pump inlets fuel transported through fuel filter and performs pressure feed to fuel rail. The pump
includes fuel flow actuator which enables adjustment of fuel rail pressure.
Fuel Pump
INFOID:0000000010935515
The fuel pump is installed in the fuel tank to start the engine faster. Fuel pump is controlled by FPCM (Fuel
Pump Control Module).
CAUTION:
Intake air temperature
°
C (
°
F)
Resistance (Approx.)
k
Ω
−
10 (14)
8.628 – 9.577
10 (50)
3.524 – 3.841
20 (68)
2.342 – 2.531
30 (86)
1.585 – 1.715
50 (122)
0.769 – 0.844
Intake air temperature
°
C (
°
F)
Resistance (Approx.)
k
Ω
−
10 (14)
9.395 – 9.775
10 (50)
3.791 – 3.927
20 (68)
2.499 – 2.583
30 (86)
1.706 – 1.760
50 (122)
0.833 – 0.857
Engine coolant temperature
°
C
(
°
F)
Resistance (Approx.)
k
Ω
−
10 (14)
11.33 – 13.59
25 (77)
2.140 – 2.364
80 (176)
0.274 – 0.290
110 (230)
0.112 – 0.117
EC-818
< SYSTEM DESCRIPTION >
[R9M]
COMPONENT PARTS
Fuel pump is lubricated by the fuel in the tank. Never operate the pump for a long time without fuel in
the tank to prevent serious damages.
Fuel Injector
INFOID:0000000010935516
This injector is a magnetic type injector. It has a code exhibiting unique characteristics, and fuel injection quan-
tity can be controlled with more precision by writing the code into ECM.
Fuel Rail Pressure Sensor
INFOID:0000000010935517
The fuel rail pressure (FRP) sensor is placed to the fuel rail. It measures the fuel pressure in the fuel rail. The
sensor sends voltage signal to the ECM. As the pressure increases, the voltage rises. ECM operates fuel flow
actuator according to feedback signal from fuel rail pressure sensor, and controls fuel pressure inside fuel rail.
Fuel Pressure Sensor
INFOID:0000000010935518
The fuel pressure sensor detects the fuel pressure (actual pressure)
of the fuel pump.
The fuel pressure measured by a measuring capacitor coupled with
the fuel pressure sensor.
When fuel pressure increase, the gap between the capacitor elec-
trodes decreases. The capacitance, and therefore the signal voltage,
thus increase in proportion to the fuel pressure.
The signal voltage serves the FPCM as information about the fuel
pressure.
Fuel Temperature Sensor
INFOID:0000000010935519
Fuel temperature sensor measures fuel temperature inside fuel tube of engine room. The sensor uses a ther-
mistor which is sensitive to the change in temperature. The electrical resistance of the thermistor decreases
as temperature increases.
<Reference data>
Fuel Heater With Water In Fuel Level Sensor
INFOID:0000000010935520
Fuel heater is installed on fuel filter and operated when fuel temperature is low in order to inhibit fuel solidifica-
tion caused by wax content separation in fuel.
FPCM (Fuel Pump Control Module)
INFOID:0000000010935521
FPCM (Fuel Pump Control Module) controls fuel pump discharge rate according to the actual fuel require-
ments of the engine and, as a result, the electric consumption of fuel pump is significantly reduced.
This is a power electronic unit controlled by ECM pulse width modulation (PWM).
Turbocharger Boost Control Solenoid Valve
INFOID:0000000010935522
Turbocharger boost control solenoid valve controls the turbocharger boost control actuator. By changing the
variable nozzle vane opening through the rods, the intake air volume is adjusted. The turbocharger boost con-
trol solenoid valve is moved by ON/OFF pulse from the ECM. The longer the ON pulse, the charge air pres-
sure rises.
JSBIA4055ZZ
Fuel temperature
°
C (
°
F)
Resistance (Approx.)
k
Ω
−
10 (14)
8.623 – 10.454
25 (77)
1.928 – 2.174
80 (176)
0.292 – 0.326
110 (230)
0.127 – 0.143
COMPONENT PARTS
EC-819
< SYSTEM DESCRIPTION >
[R9M]
C
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High Pressure EGR Volume Control Valve
INFOID:0000000010935523
High pressure EGR Volume Control Valve controls the volume of EGR gas returning from the exhaust mani-
fold to the intake manifold.
The High Pressure EGR Volume Control Valve consists of High Pressure EGR Volume Control Valve Position
Sensor, High Pressure EGR Valve, and DC motor. The High Pressure EGR Volume Control Valve Position
Sensor consists of a permanent magnet and Hall IC, and senses the valve position and feeds the voltage sig-
nals to the ECM. The ECM judges the current opening angle of the valve from this signals, and controls the
DC motor to make the valve opening angle in response to driving conditions.
The valve is controlled by means of double regulation loop.
The first loop, the quicker of the two, is a position loop. It allows the valve to be adjusted to the desired position
by feedback based on the information derived from the sensor position.
The second loop (slower) is a mass air flow loop. The mass air flow set-point is set by reference maps
depending on engine working point, ambient condition corrections (air and coolant liquid temperatures, atmo-
spheric pressure), gear engaged and state of EGR cooler bypass. For a given operating point, the air flow is
obtained by modulating the quantity of exhaust gases passing through the EGR valve and the fresh air flow
passing through the intake flap. When EGR flow is increase, fresh air flow is decrease. The air flow measure-
ment is provided by the mass air flow sensor. The fresh air and EGR flow controller provides the EGR and inlet
throttle position set-points.
Low Pressure EGR Volume Control Valve
INFOID:0000000010935524
Low Pressure EGR Volume Control Valve controls the volume of EGR gas returning from the exhaust tube
(downstream of DPF) to the passage of intake air (upstream of turbocharger).
The Low pressure EGR Volume Control Valve consists of Low pressure EGR Volume Control Valve Position
Sensor, EGR Valve, and DC motor. The EGR Volume Control Valve Position Sensor consists of a permanent
magnet and Hall IC, and senses the valve position and feeds the voltage signals to the ECM. The ECM judges
the current opening angle of the valve from this signals, and controls the DC motor to make the valve opening
angle in response to driving conditions.
Low Pressure EGR Temperature Sensor
INFOID:0000000010935525
Low Pressure EGR Temperature Sensor is installed on the downstream of EGR cooler. The sensor detects
the low pressure EGR gas temperature. The sensor modifies a voltage signal from the ECM. The modified sig-
nal returns to the ECM as the exhaust gas temperature input.
<Reference data>
Electric Throttle Control Actuator
INFOID:0000000010935526
The Electric Throttle Control Actuator consists of position sensor, throttle valve, and DC motor. The position
sensor consists of a permanent magnet and Hall IC, and senses the valve position and feeds the voltage sig-
nals to the ECM. The ECM judges the current opening angle of the valve from this signals, and controls the
DC motor to make the valve opening angle in response to driving conditions.
Throttle valve is fully open when in non-operating status. When EGR is Performed or the engine is stopped,
this valve operates in direction that closes itself.
Intake Manifold Runner Control Valve
INFOID:0000000010935527
Intake Manifold Runner Control Valve is located on the intake manifold. This valve has position sensor. It
senses the valve position and feeds the voltage signals to the ECM.
Exhaust Electric Throttle Control Actuator
INFOID:0000000010935528
Exhaust Electric Throttle Control Actuator is installed to the exhaust tube and activated only during low pres-
sure EGR.
Exhaust gas temperature
°
C (
°
F)
Resistance (Approx.)
k
Ω
0 (32)
148.9 – 175.5
20 (68)
57.1 – 65.9
100 (212)
3.167 – 3.433
130 (572)
0.062 – 0.068
EC-820
< SYSTEM DESCRIPTION >
[R9M]
COMPONENT PARTS
DPF (Diesel Particulate Filter)
INFOID:0000000010935529
DPF (Diesel Particulate Filter) traps PM (Particulate Matter) in exhaust gas. DPF is formed in a honeycomb
form made of ceramic. This structure facilitates to trap particulate matter. When the amount of particulate mat-
ter in the DPF reaches the specified level, the particulate matter needs to be reduced through burning to main-
tain the DPF function. This reducing of particulate matter is called Regeneration and should be performed
periodically. DPF can be effective for a long time through the cycle of trapping particulate matter and regener-
ation.
Exhaust Gas Pressure Sensor
INFOID:0000000010935530
Exhaust gas pressure sensor measures exhaust gas pressure around turbocharger outlet, converts it to volt-
age signal and transmits it to ECM. ECM controls turbocharger boost pressure according to this signal.
DPF Differential Pressure Sensor
INFOID:0000000010935531
DPF (Diesel Particulate Filter) pressure sensor is connected to DPF
with tubes (upstream and downstream). DPF pressure sensor mea-
sures the difference between the exhaust pressure before and after
the DPF. DPF pressure sensor converts the difference pressure into
a voltage signal. ECM receives the signal and estimates the amount
of particulate matter in DPF.
Exhaust Gas Temperature Sensor 1
INFOID:0000000010935532
The exhaust gas temperature (EGT) sensor is built-into the Exhaust Pressure Sensor. The sensor detects the
exhaust gas temperature before turbocharger. The sensor modifies a voltage signal from the ECM. The modi-
fied signal returns to the ECM as the exhaust gas temperature input.
PBIB3160E
PBIB3165E
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