2003 NISSAN X-TRAIL engine coolant

EC-608
[QR (WITHOUT EURO-OBD)]
IVT CONTROL SOLENOID VALVE
IVT CONTROL SOLENOID VALVE
PFP:23796
DescriptionEBS00BM1
SYSTEM DESCRIPTION
This mechanism hydraulically controls cam phases continuously with the fixed operating angle of the intake
valve.
The ECM receives signals such as crankshaft position, camshaft position, engine speed, and engine coolant
temperature. Then, the ECM sends ON/OFF pulse duty signals to the intake valve timing control solenoid
valve depending on driving status. This makes it possible to control the shut/open timing of the intake valve to
increase engine torque in low/mid speed range and output in high-speed range.
COMPONENT DESCRIPTION
Intake valve timing control solenoid valve is activated by ON/OFF
pulse duty (ratio) signals from the ECM.
The intake valve timing control solenoid valve changes the oil
amount and direction of flow through intake valve timing control unit
or stops oil flow.
The longer pulse width advances valve angle.
The shorter pulse width retards valve angle.
When ON and OFF pulse widths become equal, the solenoid valve
stops oil pressure flow to fix the intake valve angle at the control
position.
CONSULT-II Reference Value in Data Monitor ModeEBS00B9A
Specification data are reference values.
Sensor Input signal to ECM function ECM Actuator
Crankshaft position sensor (POS)
Engine speed
Intake valve
timing controlIntake valve timing control
solenoid valve Camshaft position sensor (PHASE)
Engine coolant temperature sensor Engine coolant temperature
Wheel sensor Vehicle speed
PBIB0540E
PBIB0195E
MONITOR ITEM CONDITION SPECIFICATION
INT/V SOL (B1)
lEngine: After warming up
lShift lever: N
lAir conditioner switch: OFF
lNo-loadIdle 0% - 2%
When revving engine up to 2,000 rpm
quicklyApprox. 0% - 50%

EC-652
[QR (WITHOUT EURO-OBD)]
SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
PFP:00030
Fuel PressureEBS00BAH
Idle Speed and Ignition TimingEBS00BAI
*1: Under the following conditions:
lAir conditioner switch: OFF
lElectric load: OFF (Lights, heater fan & rear window defogger)
lSteering wheel: Kept in straight-ahead position
Calculated Load ValueEBS00BAJ
Mass Air Flow SensorEBS00BAK
*: Engine is warmed up to normal operating temperature and running under no-load.
Intake Air Temperature SensorEBS00BAL
Engine Coolant Temperature SensorEBS00BAM
Heated Oxygen Sensor 1 HeaterEBS00BAN
Heated Oxygen sensor 2 HeaterEBS00BAO
Crankshaft Position Sensor (POS)EBS00BAP
Refer toEC-505, "Component Inspection".
Camshaft Position Sensor (PHASE)EBS00BAQ
Refer toEC-512, "Component Inspection".
Fuel pressure at idle kPa (bar, kg/cm2,psi)Approximately 350 (3.5, 3.7, 51)
Ta r g e t i d l e s p e e d
No-load*1(in“P”orN”position)A/T: 700±50 rpm
M/T: 650±50 rpm
Air conditioner: ON In “P” or N” position 725 rpm or more
Ignition timingIn “P” or N” position AT: 16°±5°BTDC
MT: 14°±5°BTDC
Calculated load value % (Using CONSULT-II or GST)
At idle10 - 35
At 2,500 rpm10 - 35
Supply voltageBattery voltage (11 - 14V)
Output voltage at idle1.1 - 1.5*V
Massairflow(UsingCONSULT-IIorGST)1.4 - 4.0 g·m/sec at idle*
4.0 - 10.0 g·m/sec at 2,500 rpm*
Temperature°C(°F) Resistance kW
25 (77)1.9 - 2.1
80 (176)0.31 - 0.37
Temperature°C(°F) Resistance kW
20 (68) 2.1 - 2.9
50 (122) 0.68 - 1.00
90 (194) 0.236 - 0.260
Resistance [at 25°C(77°F)] 2.3 - 4.3W
Resistance [at 25°C(77°F)] 2.3 - 4.3W

EC-660
[YD]
ENGINE CONTROL SYSTEM
System Chart
EBS0037B
Fuel Injection Control SystemEBS0036G
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 exchanged between ECM and Electronic Drive Unit (EDU). EDU controls fuel injectors
according to the input signals to adjust the amount of fuel injected to the preset value.
START CONTROL
Input/Output Signal Chart
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 common rail fuel 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.
Input (Sensor) ECM Function Output (Actuator)
lAccelerator pedal position sensor
lAccelerator pedal released position switch
lCommon rail fuel pressure sensor
lFuel temperature sensor
lEngine coolant temperature sensor
lCrankshaft position sensor (TDC)
lCamshaft position sensor
lVehicle speed sensor
lIgnition switch
lStop Lamp switch
lAir conditioner switch
lMass air flow sensor
lPark/neutral position switch
lBattery voltage
lPower steering oil pressure switchFuel injection controlEDU, Fuel injectors and Suction control
valve
Fuel injection timing controlEDU, Fuel injectors and Suction control
valve
Fuel cut controlEDU, Fuel injectors and Suction control
valve
Glow control system Glow relay & glow indictor lamp
On board diagnostic system Malfunction indicator (MI)
EGR volume control EGR volume control valve
Cooling fan control Cooling fan relay
Air conditioning cut control Air conditioner relay
Sensor Input Signal to ECM ECM Function Actuator
Engine coolant temperature sensor Engine coolant temperature
Fuel injection
control (start
control)EDU
Fuel injectors
Suction control valve Crankshaft position sensor (TDC) Engine speed
Camshaft position sensor Piston position
Ignition switch Start signal
Common rail fuel pressure sensor Common rail fuel pressure
SEF648S

ENGINE CONTROL SYSTEM
EC-661
[YD]
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IDLE CONTROL
Input/Output Signal Chart
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
(TDC) detects engine speed, the accelerator pedal position sensor
detects accelerator pedal position and common rail fuel pressure
sensor detects common rail fuel pressure. These sensors send sig-
nals to the ECM.
The fuel injection data, predetermined by correlation between vari-
ous engine speeds, accelerator pedal positions and common rail fuel
pressure 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.
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.
Sensor Input Signal to ECM ECM Function Actuator
Engine coolant temperature sensor Engine coolant temperature
Fuel injection
control (Idle
control)EDU
Fuel injectors
Suction control valve Crankshaft position sensor (TDC) Engine speed
Battery Battery voltage
Accelerator pedal position sensor Accelerator pedal position
Accelerator pedal released position switch Accelerator pedal released position
Vehicle speed sensor Vehicle speed
Air conditioner switch Air conditioner signal
Common rail fuel pressure sensor Common rail fuel pressure
Sensor Input Signal to ECM ECM Function Actuator
Crankshaft position sensor (TDC) Engine speed
Fuel injection
control (Nor-
mal control)EDU
Fuel injectors
Suction control valve Accelerator pedal position sensor Accelerator position
Common rail fuel pressure sensor Common rail fuel pressure
SEF649S
Sensor Input Signal to ECM ECM Function Actuator
Mass air flow sensor Amount of intake air
Fuel injection
control (Maxi-
mum amount
control)EDU
Fuel Injectors Engine coolant temperature sensor Engine coolant temperature
Crankshaft position sensor (TDC) Engine speed
Accelerator pedal position sensor Accelerator position

EC-662
[YD]
ENGINE CONTROL SYSTEM
DECELERATION CONTROL
Input/Output Signal Chart
The ECM sends a fuel cut signal to the fuel injector and suction control valve during deceleration for better fuel
efficiency. The ECM determines the time of deceleration according to signals from the accelerator pedal
released position switch and crankshaft position sensor (TDC).
Fuel Injection Timing Control SystemEBS0036H
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 ControlEBS0036I
INPUT / OUTPUT SIGNAL CHART
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)EBS0036J
INPUT/OUTPUT SIGNAL CHART
If the engine speed is above 2,800 rpm with no load (for example, in neutral and engine speed over 2,800
rpm) fuel will be cut off after some time. The exact time when the fuel is cut off varies based on engine speed.
Fuel cut will operate until the engine speed reaches 1,500 rpm, then fuel cut is cancelled.
NOTE:
This function is different from deceleration control listed underEC-660, "
Fuel Injection Control Sys-
tem".
Sensor Input Signal to ECM ECM Function Actuator
Accelerator pedal released position switch Accelerator pedal position Fuel injection
control (Decel-
eration control)EDU
Fuel injectors
Crankshaft position sensor (TDC) Engine speed
Sensor Input Signal to ECM ECM Function Actuator
Air conditioner switch Air conditioner “ON” signal
Air conditioner
cut controlAir conditioner relay Accelerator pedal position sensor Accelerator pedal opening angle
Vehicle speed sensor Vehicle speed
Engine coolant temperature sensor Engine coolant temperature
Sensor Input Signal to ECM ECM Function Actuator
Vehicle speed sensor Vehicle speed
Fuel cut controlEDU
Fuel injectors Accelerator pedal released position switch Accelerator position
Crankshaft position sensor (TDC) Engine speed

EC-676
[YD]
TROUBLE DIAGNOSIS
Symptom Matrix Chart
EBS0037F
SYSTEM — Basic engine control systemSYMPTOM
Reference page
HARD/NO START/RESTART (EXCP. HA) ENGINE STALL HESITATION/SURGING/FLAT SPOT KNOCK/DETONATION
LACK OF POWER POOR ACCELERATION
HI IDLE
LOW IDLE
NO START (with first firing) NO START (without first firing)
HARD TO START WHEN ENGINE IS COLD HARD TO START WHEN ENGINE IS HOT AT I D L E
DURING DRIVING WHEN DECELERATING
Warranty symptom code AA AB AC AD AE AF
Fuelsupplypump 55555555 55 5 —
Fuelinjector 333 333 3334433EC-727
EDU(Electronicdriveunit) 444 444 4445544EC-754
Glow control system 1 1 1 1 1EC-796
Engine body 3 3 3 3 3 3 3 3 4 4 3EM-102
EGR system33EC-803
Air cleaner and duct33MA-31
Fuel pressure relief valveEC-665
ENGINE CONTROL
Suction control valve circuit 4 4 4 4 4 4 4 4 4 4 4EC-772
Fuelinjectorcircuit 111 111 1111111EC-727
EDUcircuit 222 222 2222222EC-754
Mass air flow sensor circuit 1 1 1EC-706
Engine coolant temperature circuit 1 1 1 1EC-711
Vehicle speed sensor circuit 1EC-744
Accelerator pedal position sensor circuit 1 1 1EC-715
Accelerator pedal released position
switch circuit111111EC-783
Common rail fuel pressure sensor
circuitEC-723
Crankshaft position sensor (TDC)
circuit1111111111EC-734

EC-678
[YD]
TROUBLE DIAGNOSIS
SYSTEM — Basic engine control systemSYMPTOM
Reference page
ROUGH IDLE/HUNTING IDLING VIBRATION
SLOW/NO RETURN TO IDLE
OVERHEAT/HIGH ENGINE COOLANT TEMPERATURE EXCESSIVE FUEL CONSUMPTION EXCESSIVE OIL CONSUMPTION ABNORMAL SMOKE COLOR
DEAD BATTERY (UNDER CHARGE) Malfunction indicator illuminates. CanbedetectedbyCONSULT-II?
BLACK SMOKE WHITE SMOKE
Warranty symptom code AG AH AJ AK AL AM AP HA
Fuel supply pump 5 5 5 5 1 1 —
Fuelinjector 33344411EC-727
EDU (Electronic drive unit) 4 4 4 5 5 5 1 1EC-754
Glow system1EC-796
Engine body 3 3 3 3 1 3EM-102
EGR system3EC-803
Air cleaner and duct3MA-31
Fuel pressure relief valveEC-665
ENGINE CONTROL
Suction control valve circuit 4 4 4 4 1 1EC-772
Fuel injector circuit 1 1 1 1 1 1 1 1EC-727
EDU circuit 2 2 2 2 2 2 1 1EC-754
Mass air flow sensor circuit 1 1 1EC-706
Engine coolant temperature circuit 1 1 1 1 1EC-711
Vehicle speed sensor circuit11EC-744
Accelerator pedal position sensor circuit 1 1 1EC-715
Accelerator pedal released position switch
circuit11EC-783
Common rail fuel pressure sensor
circuit11EC-723
Crankshaft position sensor (TDC)
circuit11 11EC-734

TROUBLE DIAGNOSIS
EC-679
[YD]
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EC
1 - 5: The numbers refer to the order of inspection.
(continued on next page)
ENGINE CONTROL
Camshaft position sensor circuitEC-739
Start signal circuitEC-818
Ignition switch circuitEC-700
Power supply for ECM circuit11EC-700
Cooling fan relay circuit 2EC-761
EGR volume control valve circuit 1EC-803
Glow relay circuit1EC-796
ECM relay (Self-shutoff) circuit1EC-790
ECM,connectorcircuit 22222222222EC-749,EC-
788
Air conditioner relay circuitEC-824
Air conditioner switch circuitEC-824
NATS (Nissan Anti-theft System)1EC-666
SYSTEM — Basic engine control systemSYMPTOM
Reference page
ROUGH IDLE/HUNTING IDLING VIBRATION
SLOW/NO RETURN TO IDLE
OVERHEAT/HIGH ENGINE COOLANT TEMPERATURE EXCESSIVE FUEL CONSUMPTION
EXCESSIVE OIL CONSUMPTION ABNORMAL SMOKE COLOR DEAD BATTERY (UNDER CHARGE) Malfunction indicator illuminates. Can be detected by CONSULT-II?
BLACK SMOKE WHITE SMOKE
Warranty symptom code AG AH AJ AK AL AM AP HA