engine NISSAN TERRANO 2004 Service Repair Manual

System Chart
Input (Sensor)ECM FunctionOutput (Actuator)
I Electronic control fuel injection pump
I Crankshaft position sensor (TDC)
I Engine coolant temperature sensor
I Accelerator position sensor
I Accelerator position switch
I Accelerator switch (F/C)
I Park/Neutral position (PNP) switch
I Ignition switch
I Battery voltage
I Vehicle speed sensor
I Air conditioner switch
I Mass air flow sensor
I Stop lamp switch
I Heat up switch
I Charge air pressure sensor*1 Fuel injection control
Electronic control fuel injection pump
Fuel injection timing control Electronic control fuel injection pump
Fuel cut control Electronic control fuel injection pump
Glow control system Glow relay & glow lamp
On board diagnostic system MI (On the instrument panel)
EGR volume control EGR volume control valve
Cooling fan control Cooling fan relay
Air conditioning cut control Air conditioner relay
Variable nozzle turbocharger control Variable nozzle turbocharger control sole- noid valve
Swirl control valve control Swirl control valve control solenoid valve
Intake air control valve control Intake air control valve control solenoid
valve
*1: This sensor is not used to control the engine system under normal conditions.
ENGINE AND EMISSION CONTROL OVERALL SYSTEMZD30DDTi
EC-19
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Fuel Injection Control System
DESCRIPTION
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 compensated to improve engine performance.
Pulse signals are exchanged between ECM and electronic control fuel injection pump (control unit is built-in).
The fuel injection pump control unit performs duty control on the spill valve (built into the fuel injection pump)
according to the input signals to compensate the amount of fuel injected to the preset value.
Start control
Input/output signal chart
SensorInput Signal to ECM ECM Function Actuator
Engine coolant temperature sensor Engine coolant temperature
Fuel injection con-
trol (start control)Electronic control fuel injec-
tion pump
Crankshaft position sensor (TDC)
Engine speed
Ignition switch Start signal
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 and
engine coolant temperature.
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
SensorInput Signal to ECM ECM Function Actuator
Engine coolant temperature sensor Engine coolant temperature
Fuel injection con-
trol (Idle control)Electronic control fuel injec-
tion pump
Crankshaft position sensor (TDC)
Engine speed
Park/Neutral position (PNP) switch Gear position
Battery Battery voltage
Accelerator position switch Idle position
Vehicle speed sensor Vehicle speed
Air conditioner switch Air conditioner signal
Heat up switch Heat up switch signal
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 and heat up switch signal.
SEF648S
ENGINE AND EMISSION BASIC CONTROL SYSTEM
DESCRIPTIONZD30DDTi
EC-20
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Normal control
Input/output signal chart
SensorInput Signal to ECM ECM Function Actuator
Crankshaft position sensor (TDC) Engine speed
Fuel injection con-
trol (Normal con-
trol)Electronic control fuel injec-
tion pump
Accelerator position sensor
Accelerator position
Vehicle speed sensor Vehicle speed
The amount of fuel injected under normal driving conditions is
determined according to sensor signals. The crankshaft position
sensor (TDC) detects engine speed and the accelerator position
sensor detects accelerator position. These sensors send signals to
the ECM.
The fuel injection data, predetermined by correlation between vari-
ous engine speeds and accelerator positions, are stored in the
ECM memory, forming a map. The ECM determines the optimal
amount of fuel to be injected using the sensor signals in compari-
son with the map.
Maximum amount control
Input/output signal chart
SensorInput Signal to ECM ECM Function Actuator
Mass air flow sensor Amount of intake air
Fuel injection con-
trol (Maximum
amount control)Electronic control fuel injec-
tion pump
Engine coolant temperature sensor Engine coolant temperature
Crankshaft position sensor (TDC) Engine speed
Accelerator position sensor Accelerator position
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
during a system failure.
Deceleration control
Input/output signal chart
Sensor
Input Signal to ECM ECM Function Actuator
Accelerator switch (F/C) Accelerator positionFuel injection con-
trol (Deceleration
control)Electronic control fuel injec-
tion pump
Crankshaft position sensor (TDC) Engine speed
The ECM sends a fuel cut signal to the electronic control fuel injection pump during deceleration for better
fuel efficiency. The ECM determines the time of deceleration according to signals from the accelerator switch
(F/C) and crankshaft position sensor (TDC).
SEF649S
ENGINE AND EMISSION BASIC CONTROL SYSTEM
DESCRIPTIONZD30DDTi
Fuel Injection Control System (Cont'd)
EC-21
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Fuel Injection Timing Control System
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 and the injection pump control unit exchange signals and per-
form feedback control for optimum injection timing in accordance with the map.
Air Conditioning Cut Control
DESCRIPTION
Input/output signal chart
SensorInput Signal to ECM ECM Function Actuator
Air conditioner switch Air conditioner ªONº signal
Air conditioner cut
controlAir conditioner relay
Accelerator position sensor
Accelerator valve opening
angle
Vehicle speed sensor Vehicle speed
Engine coolant temperature sensor Engine coolant temperature
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)
DESCRIPTION
Input/output signal chart
SensorInput Signal to ECM ECM Function Actuator
Vehicle speed sensor Vehicle speed
Fuel cut controlElectronic control fuel injec-
tion pump
Park/Neutral position (PNP) switch
Neutral position
Accelerator position switch or Accelerator
switch (F/C) Accelerator position
Engine coolant temperature sensor Engine coolant temperature
Crankshaft position sensor (TDC) Engine speed
If the engine speed is above 2,700 rpm with no load (for example, in neutral and engine speed over 2,700
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 under ªFuel Injection Control Systemº, EC-20.
ENGINE AND EMISSION BASIC CONTROL SYSTEM
DESCRIPTIONZD30DDTi
EC-22
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Crankcase Ventilation System
DESCRIPTION
In this system, blow-by gas is sucked into the air inlet pipe after oil
separation by oil separator in the rocker cover.
INSPECTION
Ventilation hose
1. Check hoses and hose connections for leaks.
2. Disconnect all hoses and clean with compressed air. If anyhose cannot be freed of obstructions, replace.
JEF224Z
SEC692
ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTIONZD30DDTi
EC-23
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Injection Tube and Injection Nozzle
REMOVAL AND INSTALLATION
CAUTION:
IDo not disassemble injection nozzle assembly. If NG,
replace injection nozzle assembly.
I Plug flare nut with a cap or rag so that no dust enters the
nozzle. Cover nozzle tip for protection of needle.
Injection tube
Removal
1. Mark the cylinder Nos. to the injection tubes, then disconnect
them.
I Marking should be made at proper locations and by the
proper method, so that they are not erased by fuel, etc.
2. Remove the clamps, then disconnect the tubes one by one.
I Avoid letting leaked fuel get on the interior walls of the
engine compartment.
Take special care to prevent fuel from getting on the engine
mount insulator.
JEF237Z
JEF238Z
BASIC SERVICE PROCEDUREZD30DDTi
EC-24
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REMOVAL
1. Remove the following:
IEngine coolant draining
I Charge air cooler
I Air inlet pipe
I Throttle body
I Rocker cover
I Oil level gauge guide
I EGR cooler
I EGR guide tube
I EGR volume control solenoid valve
I Fuel hose
I Injection tube
I Radiator upper hose
I Radiator shroud
I Cooling fan
I Drive belt
I Vacuum pipe
I Vacuum pump
2. Move the power steering pump.
3. Remove the harness connector from the fuel injection pump.
I After pulling the connector stopper all the way back, remove the
connector.
I When the stopper is pulled all the way back, the interlocked-
connector will come off.
As for installation, when the connector is pushed all the way
forward until the stopper locks, the interlocked-connector is
inserted.
4. Remove the fuel injection pump rear bracket.
5. Remove the chain cover.
I Remove the installation bolts A, B, and C shown in the figure
(left).
CAUTION:
During chain cover removal, seal the opening to prevent for-
eign objects from getting into the engine.
6. Fix the internal mechanism of the idler gear (scissors gear structure).
a. Remove the plug on the front side of the gear case.
b. While turning the crankshaft pulley clockwise, check the tight- ening bolt hole of the idler gear internal mechanism through the
plug hole.
I Conduct the visual check using a mirror.
I When checking, note that there are 2 other holes (with no
thread) beside the tightening bolt hole on the idler gear.
JEF260Z
JEF261Z
JEF262Z
BASIC SERVICE PROCEDUREZD30DDTi
Electronic Control Fuel Injection Pump (Cont'd)
EC-28
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13. Make the mating marks on the fuel injection pump flange andfront plate with paint.
14. Remove installation bolts first, and then fuel injection pump toward the rear side of the engine.
I When the fuel injection pump is stationary, it can still be
retained by the dowel without all bolts.
CAUTION:
Do not disassemble or adjust the fuel injection pump.
INSTALLATION
I The injection timing adjustment to correct the installation angle
deviation is not necessary. Install the pump in the proper posi-
tion according to the dowel and installation bolts.
1. Install the fuel injection pump from the rear side of the engine.
I Match the dowel of the spacer to the dowel hole of the pump
side for installation.
I Replace the seal washer of the installation bolt with a new one.
2. Align the mating marks of the fuel injection pump flange and front plate, and then adjust the approximate flange position.
I Each hole [6 mm (0.24 in) dia.] is used as a reference point for
the fuel injection pump flange, fuel injection pump gear, and fuel
injection pump sprocket.
I Only during removal/installation at No. 1 cylinder compression
top dead center, can the hole [6 mm (0.24 in) dia.] of the pump
body be aligned.
3. Install the fuel injection pump sprocket and gear as an assem- bly.
I Align the mating marks of the idler gear and fuel injection pump
gear properly.
4. Tighten the installation bolt of the fuel injection pump sprocket.
I Fix the fuel injection pump gear with the pulley holder (SST),
and tighten the installation bolt.
CAUTION:
Before tightening the installation bolt, check again that the
mating marks of the idler gear and fuel injection pump gear are
aligned.
JEF268Z
JEF269Z
JEF270Z
JEF271Z
JEF267Z
BASIC SERVICE PROCEDUREZD30DDTi
Electronic Control Fuel Injection Pump (Cont'd)
EC-30
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Air Bleeding
Pump the priming pump to bleed air.
IWhen air is bled completely, the pumping of the priming
pump suddenly becomes heavy. Stop operation at that
time.
I If it is difficult to bleed air by the pumping of the priming
pump (the pumping of the priming pump does not become
heavy), disconnect the fuel supply hose between the fuel
filter and the injection pump. Then, perform the operation
described above, and make sure that fuel comes out. (Use
a pan, etc. so as not to spill fuel. Do not let fuel get on
engine and other parts.) After that, connect the hose, and
then bleed air again.
MEC991D
BASIC SERVICE PROCEDUREZD30DDTi
EC-32
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DTC and MI Detection Logic
When a malfunction is detected, the malfunction (DTC) is stored in the ECM memory.
The MI will light up each time the ECM detects malfunction. For diagnostic items causing the MI to light up,
refer to ªTROUBLE DIAGNOSIS Ð INDEXº, EC-7.
Diagnostic Trouble Code (DTC)
HOW TO READ DTC
The DTC can be read by the following methods.
Without CONSULT-II
ECM displays the DTC by a set of four digit numbers with MI illumination in the diagnostic test mode II (Self-
diagnostic results). Example: 0102, 0407, 1004, etc.
With CONSULT-II
CONSULT-II displays the DTC in ªSELF-DIAG RESULTSº mode. Examples: ªCRANK POS SEN (TDC)º, etc.
I Output of the trouble code means that the indicated circuit has a malfunction. However, in the Mode
II it does not indicate whether the malfunction is still occurring or occurred in the past and returned
to normal.
CONSULT-II can identify them. Therefore, using CONSULT-II (if available) is recommended.
HOW TO ERASE DTC
How to erase DTC (
With CONSULT-II)
1. If the ignition switch stays ªONº after repair work, be sure to turn ignition switch ªOFFº once. Wait at least
5 seconds and then turn it ªONº (engine stopped) again.
2. Touch ªENGINEº.
3. Touch ªSELF-DIAG RESULTSº.
4. Touch ªERASEº. (The DTC in the ECM will be erased.)
The emission related diagnostic information in the ECM can be erased by selecting ªERASEº in the ªSELF-
DIAG RESULTSº mode with CONSULT-II.
How to erase DTC (Without CONSULT-II)
1. If the ignition switch stays ªONº after repair work, be sure to turn ignition switch ªOFFº once. Wait at least 5 seconds and then turn it ªONº (engine stopped) again.
2. Change the diagnostic test mode from Mode II to Mode I by using the data link connector. (See EC-36.)
The emission related diagnostic information in the ECM can be erased by changing the diagnostic test mode.
SEF371Y
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTIONZD30DDTi
EC-33
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