2002 NISSAN TERRANO Injection pump

ENGINE CONTROL SYSTEM
SECTION
EC
CONTENTS
ZD30DDTi
TROUBLE DIAGNOSIS - INDEX....................................7
Alphabetical & Numerical Index for DTC ....................7
PRECAUTIONS...............................................................9
Precautions ..................................................................9
ENGINE AND EMISSION CONTROL OVERALL
SYSTEM.........................................................................12
Engine Control Component Parts Location ...............12
Circuit Diagram ..........................................................16
System Diagram ........................................................17
Vacuum Hose Drawing ..............................................18
System Chart .............................................................19
ENGINE AND EMISSION BASIC CONTROL
SYSTEM DESCRIPTION...............................................20
Fuel Injection Control System ...................................20
Fuel Injection Timing Control System........................22
Air Conditioning Cut Control ......................................22
Fuel Cut Control (at no load & high engine
speed) ........................................................................22
Crankcase Ventilation System ...................................23
BASIC SERVICE PROCEDURE...................................24
Injection Tube and Injection Nozzle ..........................24
Electronic Control Fuel Injection Pump .....................27
Air Bleeding ...............................................................32
ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION...............................................................33
DTC and MI Detection Logic .....................................33
Diagnostic Trouble Code (DTC) ................................33
Malfunction Indicator (MI) ..........................................34
CONSULT-II ...............................................................39
TROUBLE DIAGNOSIS - INTRODUCTION..................46
Introduction ................................................................46
Work Flow ..................................................................48
TROUBLE DIAGNOSIS - BASIC INSPECTION...........50
Basic Inspection.........................................................50
TROUBLE DIAGNOSIS - GENERAL
DESCRIPTION...............................................................56
Symptom Matrix Chart ...............................................56CONSULT-II Reference Value in Data Monitor
Mode ..........................................................................66
Major Sensor Reference Graph in Data Monitor
Mode ..........................................................................68
ECM Terminals and Reference Value .......................69
TROUBLE DIAGNOSIS FOR INTERMITTENT
INCIDENT.......................................................................78
Description .................................................................78
Diagnostic Procedure ................................................78
TROUBLE DIAGNOSIS FOR POWER SUPPLY..........79
Main Power Supply and Ground Circuit ....................79
DTC 0102 MASS AIR FLOW SEN................................88
Component Description .............................................88
CONSULT-II Reference Value in Data Monitor
Mode ..........................................................................88
ECM Terminals and Reference Value .......................88
On Board Diagnosis Logic.........................................88
DTC Confirmation Procedure ....................................89
Wiring Diagram ..........................................................90
Diagnostic Procedure ................................................92
DTC 0103 COOLANT TEMP SEN................................95
Description .................................................................95
On Board Diagnosis Logic.........................................95
DTC Confirmation Procedure ....................................95
Wiring Diagram ..........................................................96
Diagnostic Procedure ................................................97
DTC 0104 VEHICLE SPEED SEN................................99
Description .................................................................99
ECM Terminals and Reference Value .......................99
On Board Diagnosis Logic.........................................99
Overall Function Check ...........................................100
Wiring Diagram ........................................................101
Diagnostic Procedure ..............................................103
DTC 0203 ACCEL POS SW (F/C)..............................104
Description ...............................................................104
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................104
ECM Terminals and Reference Value .....................104
On Board Diagnosis Logic.......................................104

CONSULT-II Reference Value in Data Monitor
Mode ........................................................................281
ECM Terminals and Reference Value .....................282
Wiring Diagram ........................................................283
Diagnostic Procedure ..............................................284
AIR CONDITIONER CONTROL..................................289
Wiring Diagram ........................................................289
MI (MIL) & DATA LINK CONNECTORS.....................291
Wiring Diagram ........................................................291
SERVICE DATA AND SPECIFICATIONS (SDS)........292
General Specifications .............................................292
Injection Pump Numbers .........................................292
Injection Nozzle .......................................................292
Engine Coolant Temperature Sensor ......................292
Crankshaft Position Sensor (TDC) ..........................292
Glow Plug ................................................................292
Accelerator Position Sensor ....................................292
EGR Volume Control Valve .....................................292
TD27Ti
TROUBLE DIAGNOSIS - INDEX................................293
Alphabetical & Numerical Index for DTC ................293
PRECAUTIONS AND PREPARATION........................295
Special Service Tools ..............................................295
Engine Fuel & Emission Control System ................297
Precautions ..............................................................298
ENGINE AND EMISSION CONTROL OVERALL
SYSTEM.......................................................................300
Engine Control Component Parts Location .............300
Circuit Diagram ........................................................302
System Diagram ......................................................303
Vacuum Hose Drawing ............................................304
System Chart ...........................................................305
ENGINE AND EMISSION BASIC CONTROL
SYSTEM DESCRIPTION.............................................306
Fuel Injection System ..............................................306
Fuel Injection Timing System ..................................309
Air Conditioning Cut Control .................................... 311
Fuel Cut Control (at high engine speed) ................. 311
Glow Control ............................................................ 311
CRANKCASE VENTILATION SYSTEM......................312
Description ...............................................................312
Blow-by Control Valve .............................................312
Ventilation Hose .......................................................312
INJECTION NOZZLE...................................................313
Removal and Installation .........................................313
Disassembly (No.2-4nozzle) ...............................313
Inspection (No.2-4nozzle) ...................................314
Cleaning (No.2-4nozzle) .....................................314
Assembly (No.2-4nozzle) ....................................315
Test and Adjustment ................................................316
ELECTRONIC FUEL INJECTION PUMP....................318Removal ...................................................................318
Installation ................................................................319
Disassembly and Assembly .....................................320
ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION.............................................................321
DTC and MI Detection Logic ...................................321
Diagnostic Trouble Code (DTC) ..............................321
Malfunction Indicator (MI) ........................................322
CONSULT-II .............................................................327
TROUBLE DIAGNOSES.............................................334
Introduction ..............................................................334
Diagnostic Worksheet ..............................................335
Work Flow ................................................................336
Description for Work Flow .......................................337
Basic Inspection.......................................................338
Symptom Matrix Chart .............................................340
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................343
Major Sensor Reference Graph in Data Monitor
Mode ........................................................................345
ECM Terminals and Reference Value .....................346
TROUBLE DIAGNOSIS FOR POWER SUPPLY........352
Wiring Diagram ........................................................352
Diagnostic Procedure ..............................................353
DTC P0100 MASS AIR FLOW SEN...........................356
Component Description ...........................................356
On Board Diagnosis Logic.......................................356
DTC Confirmation Procedure ..................................356
Wiring Diagram ........................................................357
Diagnostic Procedure ..............................................359
Component Inspection .............................................360
DTC P0115 COOLANT TEMP SEN............................361
Component Description ...........................................361
On Board Diagnosis Logic.......................................361
DTC Confirmation Procedure ..................................361
Wiring Diagram ........................................................362
Diagnostic Procedure ..............................................363
Component Inspection .............................................364
DTC P0120 ACCEL POS SENSOR............................365
Component Description ...........................................365
On Board Diagnosis Logic.......................................365
DTC Confirmation Procedure A (For General
Plausibility) ...............................................................365
DTC Confirmation Procedure B (For Accelerator
Sticking) ...................................................................366
Wiring Diagram ........................................................367
Diagnostic Procedure ..............................................368
Component Inspection .............................................371
DTC P0180 FUEL TEMP SENSOR............................372
Component Description ...........................................372
On Board Diagnosis Logic.......................................372
DTC Confirmation Procedure ..................................372
CONTENTS(Cont'd)
EC-4

IDo not disconnect pump harness connector with engine
running.
IDo not disassemble electronic fuel injection pump.
If NG, take proper action.
IDo not disassemble injection nozzle.
If NG, replace injection nozzle.
IEven a slight leak in the air intake system can cause seri-
ous problems.
IDo not shock or jar the crankshaft position sensor (TDC).
IDo not depress accelerator pedal when starting.
IImmediately after starting, do not rev up engine unneces-
sarily.
IDo not rev up engine just prior to shutdown.
IWhen 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 its installation loca-
tion.
1) Keep the antenna as far as possible away from the ECM.
2) Keep the antenna feeder line more than 20 cm (7.9 in) away
from the harness of electronic controls.
Do not let them run parallel for a long distance.
3) Adjust the antenna and feeder line so that the standing-
wave ratio can be kept smaller.
4) Be sure to ground the radio to vehicle body.
SEF437Y
SEF709Y
SEF708Y
PRECAUTIONSZD30DDTi
Precautions (Cont'd)
EC-11

System Chart
Input (Sensor) ECM Function Output (Actuator)
IElectronic control fuel injection pump
ICrankshaft position sensor (TDC)
IEngine coolant temperature sensor
IAccelerator position sensor
IAccelerator position switch
IAccelerator switch (F/C)
IPark/Neutral position (PNP) switch
IIgnition switch
IBattery voltage
IVehicle speed sensor
IAir conditioner switch
IMass air flow sensor
IStop lamp switch
IHeat up switch
ICharge air pressure sensor*1Fuel 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 MIL (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

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
Sensor Input 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
Sensor Input 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

Normal control
Input/output signal chart
Sensor Input 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
Sensor Input 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

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
Sensor Input Signal to ECM ECM Function Actuator
Air conditioner switch Air conditioner ªONº signal
Air conditioner cut
controlAir conditioner relay Accelerator position sensorAccelerator 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
Sensor Input 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

Inspection for spill tube airtightness
Before the rocker cover is installed, perform the inspection as fol-
lows.
1. Connect the handy vacuum pump to the spill hose.
2. Check that the airtightness is maintained after the negative
pressure shown below is applied.
Standard:
þ53.3 to þ66.7 kPa (þ533 to þ667 mbar, þ400 to
þ500 mmHg, þ15.75 to þ19.69 inHg)
Air bleeding of fuel piping
After the repair, bleed air in the piping by pumping the priming
pump up and down until it becomes heavy.
Injection pressure test
1. Install injection nozzle assembly to injection nozzle tester and
bleed air from flare nut.
2. Pump the tester handle slowly (one time per second) and watch
the pressure gauge.
3. Read the pressure gauge when the injection pressure just
starts dropping.
Initial injection pressure:
Used
19,026 kPa (190.3 bar, 194 kg/cm
2, 2,759 psi)
New
19,516 - 20,497 kPa (195.2 - 205.0 bar, 199 - 209
kg/cm
2, 2,830 - 2,972 psi)
Limit
16,182 kPa (161.8 bar, 165 kg/cm
2, 2,346 psi)
IThe injection nozzle assembly has a 2-stage pressure injection
function. However, the judgement should be made at the first
stage of the valve opening pressure.
JEF250Z
MEC991D
JEF348Y
BASIC SERVICE PROCEDUREZD30DDTi
Injection Tube and Injection Nozzle (Cont'd)
EC-26