2003 NISSAN ALMERA N16 flow

EVAPORATIVE EMISSION SYSTEM
EC-719
[QG (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
Component InspectionEBS00KMI
EVAP CANISTER
Check EVAP canister as follows:
1. Block port B . Orally blow air through port A .
Check that air flows freely through port C .
2. Block port A . Orally blow air through port B .
Check that air flows freely through port C .
FUEL CHECK VALVE
1. Blow air through connector on fuel tank side.
A considerable resistance should be felt and a portion of air flow
should be directed toward the EVAP canister side.
2. Blow air through connector on EVAP canister side.
Air flow should be smoothly directed toward fuel tank side.
3. If fuel check valve is suspected of not properly functioning in
steps 1 and 2 above, replace it.
FUEL TANK VACUUM RELIEF VALVE (BUILT INTO FUEL FILLER CAP)
1. Wipe clean valve housing.
2. Check valve opening pressure and vacuum.
3. If out of specification, replace fuel filler cap as an assembly.
EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
Refer to EC-676, "Component Inspection" .
PBIB0663E
SEF552Y
SEF989X
Pres-
sure:15.3 - 20.0 kPa (0.153 - 0.200 bar,
0.156 - 0.204 kg/cm
2 , 2.22 - 2.90 psi)
Va c u u m :−6.0 to −3.3 kPa (−0.060 to −0.033 bar,
−0.061 to −0.034 kg/cm
2 , −0.87 to −0.48 psi)
SEF943S

EC-720
[QG (WITHOUT EURO-OBD)]
POSITIVE CRANKCASE VENTILATION
POSITIVE CRANKCASE VENTILATION
PFP:11810
DescriptionEBS00KMJ
SYSTEM DESCRIPTION
This system returns blow-by gas to the intake manifold.
The positive crankcase ventilation (PCV) valve is provided to conduct crankcase blow-by gas to the intake
manifold. During partial throttle operation of the engine, the intake manifold sucks the blow-by gas through the
PCV valve. Normally, the capacity of the valve is sufficient to handle any blow-by and a small amount of venti-
lating air. The ventilating air is then drawn from the air inlet tubes into the crankcase. In this process the air
passes through the hose connecting air inlet tubes to rocker cover. Under full-throttle condition, the manifold
vacuum is insufficient to draw the blow-by flow through the valve. The flow goes through the hose connection
in the reverse direction.
On vehicles with an excessively high blow-by, the valve does not
meet the requirement. This is because some of the flow will go
through the hose connection to the air inlet tubes under all condi-
tions.
Component InspectionEBS00KMK
PCV (POSITIVE CRANKCASE VENTILATION) VALVE
With engine running at idle, remove PCV valve from rocker cover. A
properly working valve makes a hissing noise as air passes through
it. A strong vacuum should be felt immediately when a finger is
placed over valve inlet.
PBIB0492E
SEF559A
SEC137A

EC-722
[QG (WITHOUT EURO-OBD)]
SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
PFP:00030
Fuel PressureEBS00KML
Idle Speed and Ignition TimingEBS00KMM
*1: Under the following conditions:
●Air conditioner switch: OFF
●Electric load: OFF (Lights, heater fan & rear window defogger)
●Steering wheel: Kept in straight-ahead position
Calculated Load ValueEBS00KMN
Mass Air Flow SensorEBS00KMO
*: Engine is warmed up to normal operating temperature and running under no-load.
Intake Air Temperature SensorEBS00KMP
Engine Coolant Temperature SensorEBS00KMQ
Heated Oxygen Sensor 1 HeaterEBS00KMR
Heated Oxygen sensor 2 HeaterEBS00KMS
Crankshaft Position Sensor (POS)EBS00KMT
Refer to EC-559, "Component Inspection" .
Camshaft Position Sensor (PHASE)EBS00KMU
Refer to EC-566, "Component Inspection" .
Fuel pressure at idle
Approximately 350 kPa (3.5bar, 3.57kg/cm2 , 51psi)
Target idle speed
No-load*1 (in “P” or N” position)A/T: 800±50 rpm
M/T: 700±50 rpm
Air conditioner: ON In “P” or N” position 900 rpm or more
Ignition timingIn “P” or N” position A/T: 10°±5° BTDC
M/T: 8°±5° BTDC
Calculated load value % (Using CONSULT-II)
At idle10 - 35
At 2,500 rpm10 - 35
Supply voltageBattery voltage (11 - 14V)
Output voltage at idle1.0 - 1.7*V
Mass air flow (Using CONSULT-II)1.0 - 4.0 g·m/sec at idle*
5.0 - 10.0 g·m/sec at 2,500 rpm*
Temperature °C (°F) Resistance kΩ
25 (77)1.9 - 2.1
80 (176)0.31 - 0.37
Temperature °C (°F) Resistance kΩ
20 (68) 2.1 - 2.9
50 (122) 0.68 - 1.00
90 (194) 0.236 - 0.260
Resistance [at 20°C (68°F)] 8 - 10Ω
Resistance [at 25°C (77°F)] 2.3 - 4.3Ω

ENGINE CONTROL SYSTEM
SECTION
EC
CONTENTS
YD
TROUBLE DIAGNOSIS - INDEX....................................4
Alphabetical & P No. Index for DTC ...........................4
PRECAUTIONS<0011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100
11001100110011001100110011001100110011001100110011[6
Supplemental Restraint System (SRS)″AIR
BAG″and″SEAT BELT PRE-TENSIONER″...............6
Engine Fuel & Emission Control System ....................7
Precautions <0011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100
110011[..............8
Wiring Diagrams and Trouble Diagnosis .....................9
PREPARATION<0011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100
110011001100110011001100110011001100110011>0
Special Service Tools ................................................10
ENGINE AND EMISSION CONTROL OVERALL
SYSTEM<0011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100
11001100110011001100110011001100110011001100110011[.......... 11
Engine Control Component Parts Location ............... 11
Circuit Diagram ..........................................................14
System Diagram ........................................................15
System Chart <0011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100
110011[.........16
ENGINE AND EMISSION BASIC CONTROL
SYSTEM DESCRIPTION...............................................17
Fuel Injection Control System ...................................17
Fuel Injection Timing Control System........................18
Air Conditioning Cut Control ......................................19
Fuel Cut Control (at no load & high engine
speed) <0011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100
11001100110011001100110011[...............19
Crankcase Ventilation System ...................................19
BASIC SERVICE PROCEDURE...................................21
Injection Tube and Injection Nozzle ..........................21
Electronic Control Fuel Injection Pump .....................25
Fuel Filter <0011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100
1100110011[..............32
ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION<0011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100
11001100110011001100110011001100110011001100110011[34
DTC and MI Detection Logic .....................................34
Diagnostic Trouble Code (DTC) ................................34
Malfunction Indicator (MI) ..........................................35
CONSULT-II <0011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100
1100110011[..........39
TROUBLE DIAGNOSIS - INTRODUCTION..................44
Introduction <0011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100
11[.............44
Work Flow <0011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100
110011001100110011[...........46TROUBLE DIAGNOSIS - BASIC INSPECTION...........48
Basic Inspection.........................................................48
TROUBLE DIAGNOSIS - GENERAL
DESCRIPTION<0011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100
11001100110011001100110011001100110011001100110011[53
Symptom Matrix Chart ...............................................53
CONSULT-II Reference Value in Data Monitor
Mode <0011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100
1100110011001100110011001100110011[...............63
Major Sensor Reference Graph in Data Monitor
Mode <0011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100
1100110011001100110011001100110011[...............65
ECM Terminals and Reference Value .......................66
TROUBLE DIAGNOSIS FOR INTERMITTENT
INCIDENT<0011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100
11001100110011001100110011001100110011001100110011[........71
Description <0011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100
110011[.............71
Diagnostic Procedure ................................................71
TROUBLE DIAGNOSIS FOR POWER SUPPLY..........72
Main Power Supply and Ground Circuit ....................72
DTC P0100 MASS AIR FLOW SEN.............................78
Component Description .............................................78
CONSULT-II Reference Value in Data Monitor
Mode <0011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100
1100110011001100110011001100110011[...............78
ECM Terminals and Reference Value .......................78
On Board Diagnosis Logic.........................................78
DTC Confirmation Procedure ....................................79
Wiring Diagram ..........................................................80
Diagnostic Procedure ................................................81
DTC P0115 COOLANT TEMP SEN..............................84
Description <0011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100
110011[.............84
On Board Diagnosis Logic.........................................84
DTC Confirmation Procedure ....................................84
Wiring Diagram ..........................................................86
Diagnostic Procedure ................................................87
DTC P0120 ACCEL POS SENSOR..............................89
Description <0011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100
110011[.............89
CONSULT-II Reference Value in Data Monitor
Mode <0011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100
1100110011001100110011001100110011[...............89
ECM Terminals and Reference Value .......................89
On Board Diagnosis Logic.........................................90
DTC Confirmation Procedure ....................................90
Wiring Diagram ..........................................................91
GI
MA
EM
LC
FE
CL
MT
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX

Alphabetical & P No. Index for DTCNJEC0600ALPHABETICAL INDEX FOR DTCNJEC0600S01X: Applicable —: Not applicable
Items
(CONSULT-II screen terms)DTC
Trip MI lighting up Reference page
CONSULT-II ECM
ACCEL POS SENSOR P0120 0403 1 X EC-89
BATTERY VOLTAGE P1660 0502 1 — EC-183
BRAKE SW P0571 0807 1 X EC-109
COOLANT TEMP SEN P0115 0103 1 X EC-84
CRANK POS SEN (TDC) P0335 0407 1 X EC-99
ECM RLY P1620 0902 1 X EC-177
ECM 2 P1607 0301 1 X EC-175
ECM 10 P1107 0802 1 X EC-116
ECM 12 P1603 0901 1 X EC-175
ECM 15 P1621 0903 1 — EC-181
FUEL CUT SYSTEM2 P1202 1002 1 X EC-124
MASS AIR FLOW SEN P0100 0102 1 X EC-78
NO DTC IS DETECTED.
FURTHER TESTING
MAY BE REQUIRED.P0000 0505———
OVER HEAT P1217 0208 1 X EC-130
P1·CAM POS SEN P1341 0701 1 X EC-163
P2·TDC PULSE SIG P1337 0702 1 X EC-157
P3·PUMP COMM LINE P1600 0703 1 X EC-169
P4·SPILL/V CIRC P1251 0704 1 X EC-151
P5·PUMP C/MODULE P1690 0705 1 X EC-185
P7·F/INJ TIMG FB P1241 0707 1 X EC-145
P9·FUEL TEMP SEN P1180 0402 1 X EC-118
VEHICLE SPEED SEN P0500 0104 1 X EC-105
TROUBLE DIAGNOSIS — INDEXYD
Alphabetical & P No. Index for DTC
EC-4

P NO. INDEX FOR DTC=NJEC0600S02X: Applicable —: Not applicable
DTC
Trip MI lighting upItems
(CONSULT-II screen
terms)Reference page
CONSULT-II ECM
P0000 0505——NO DTC IS DETECTED.
FURTHER TESTING
MAY BE REQUIRED.—
P0100 0102 1 X MASS AIR FLOW SEN EC-78
P0115 0103 1 X COOLANT TEMP SEN EC-84
P0120 0403 1 X ACCEL POS SENSOR EC-89
P0335 0407 1 XCRANK POS SEN
(TDC)EC-99
P0500 0104 1 X VEHICLE SPEED SEN EC-105
P0571 0807 1 X BRAKE SW EC-109
P1107 0802 1 X ECM 10 EC-116
P1180 0402 1 X P9·FUEL TEMP SEN EC-118
P1202 1002 1 X FUEL CUT SYSTEM2 EC-124
P1217 0208 1 X OVER HEAT EC-130
P1241 0707 1 X P7·F/INJ TIMG FB EC-145
P1251 0704 1 X P4·SPILL/V CIRC EC-151
P1337 0702 1 X P2·TDC PULSE SIG EC-157
P1341 0701 1 X P1·CAM POS SEN EC-163
P1600 0703 1 X P3·PUMP COMM LINE EC-169
P1603 0901 1 X ECM 12 EC-175
P1607 0301 1 X ECM 2 EC-175
P1620 0902 1 X ECM RLY EC-177
P1621 0903 1 — ECM 15 EC-181
P1660 0502 1 — BATTERY VOLTAGE EC-183
P1690 0705 1 X P5·PUMP C/MODULE EC-185GI
MA
EM
LC
FE
CL
MT
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
TROUBLE DIAGNOSIS — INDEXYD
Alphabetical & P No. Index for DTC (Cont’d)
EC-5

System ChartNJEC0611
Input (Sensor) ECM Function Output (Actuator)
Electronic control fuel injection pump
Crankshaft position sensor (TDC)
Engine coolant temperature sensor
Accelerator position sensor
Accelerator position switch
Park/Neutral position (PNP) switch*
Ignition switch
Battery voltage
Vehicle speed sensor
Air conditioner switch
Mass air flow sensor
Stop lamp switchFuel injection controlElectronic control fuel injection
pump
Fuel injection timing controlElectronic control fuel injection
pump
Fuel cut controlElectronic 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
*: If so equipped
ENGINE AND EMISSION CONTROL OVERALL SYSTEMYD
System Chart
EC-16

Normal ControlNJEC0612S04Input/Output Signal ChartNJEC0612S0401
Sensor Input Signal to ECM ECM Function Actuator
Crankshaft position sensor (TDC) Engine speedFuel injection
control (Normal
control)Electronic control fuel
injection pump
Accelerator position sensor Accelerator position
SEF649S
The amount of fuel injected under normal driving conditions is determinedaccording to sensor signals. The
crankshaft position sensor (TDC) detects engine speed and the accelerator position sensor detects accelera-
tor position. These sensors send signals to the ECM.
The fuel injection data, predetermined by correlation between various 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 comparison with the map.
Maximum Amount ControlNJEC0612S05Input/Output Signal ChartNJEC0612S0501
Sensor Input Signal to ECM ECM Function Actuator
Mass air flow sensor Amount of intake air
Fuel injection
control (Maxi-
mum amount
control)Electronic control fuel
injection pump Engine coolnat 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 ControlNJEC0612S06Input/Output Signal ChartNJEC0612S0601
Sensor Input Signal to ECM ECM Function Actuator
Accelerator position switch Accelerator positionFuel injection
control (Decel-
eration control)Electronic control fuel
injection 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 tosignals from the accelerator posi-
tion switch and crankshaft position sensor (TDC).
Fuel Injection Timing Control System
DESCRIPTIONNJEC0613The 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 themap.
ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTIONYD
Fuel Injection Control System (Cont’d)
EC-18