Infiniti I30. Emission Control System (2003 year). Manual — part 4

CHECK WATER SEPARATOR

1. Check visually for insect nests in the water separator air inlet.
2. Check visually for cracks or flaws in the appearance.
3. Check visually for cracks or flaws in the hose.
4. Check that A and C are not clogged by blowing air into B with A, and then C plugged.

PBIB1032E

5. In case of NG in items 2 - 4, replace the parts.
NOTE:

쐌

Do not disassemble water separator.

OK or NG

䊳

GO TO 5.

䊳

Replace water separator.

DETECT MALFUNCTIONING PART

Check the EVAP hose between EVAP canister and water separator for clogging or poor connection.

䊳

Repair or replace EVAP hose.

CHECK VENT HOSES AND VENT TUBES

Check hoses and tubes between EVAP canister and refueling control valve for clogging, kink, looseness and improper
connection.

OK or NG

䊳

GO TO 7.

䊳

Repair or replace hoses and tubes.

CHECK FILLER NECK TUBE

Check signal line and recirculation line for clogging, dents and cracks.

OK or NG

䊳

GO TO 8.

䊳

Replace filler neck tube.

IDX

ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTION

On Board Refueling Vapor Recovery (ORVR) (Cont’d)

EC-49

CHECK REFUELING CONTROL VALVE

1. Remove fuel filler cap.
2. Check air continuity between hose ends A and B.

Blow air into the hose end B. Air should flow freely into the fuel tank.

3. Blow air into hose end A and check there is no leakage.
4. Apply pressure to both hose ends A and B [20 kPa (150 mmHg, 5.91 inHg)] using a pressure pump and a suitable

3-way connector. Check that there is no leakage.

SEF968X

OK or NG

OK (With CONSULT-II)

䊳

GO TO 9.

OK (Without CONSULT-
II)

䊳

GO TO 10.

䊳

Replace refueling control valve with fuel tank.

CHECK REFUELING EVAP VAPOR CUT VALVE

With CONSULT-II

1. Remove fuel tank. Refer to FE-4, “FUEL SYSTEM”.
2. Drain fuel from the tank as follows:
a. Remove fuel feed hose located on the fuel gauge retainer.
b. Connect a spare fuel hose, one side to fuel gauge retainer where the hose was removed and the other side to a fuel

container.

c. Drain fuel using “FUEL PUMP RELAY” in “ACTIVE TEST” mode with CONSULT-II.
3. Check refueling EVAP vapor cut valve for being stuck to close as follows.

Blow air into the refueling EVAP vapor cut valve (from hose end B), and check that the air flows freely into the tank.

4. Check EVAP vapor cut valve for being stuck to open as follows.
a. Connect vacuum pump to hose ends A and B using a suitable 3-way connector.
b. Remove fuel gauge retainer with fuel gauge unit.

Always replace O-ring with new one.

c. Put fuel tank upside down.
d. Apply vacuum pressure to both hose ends A and B [−13.3 kPa (−100 mmHg, −3.94 inHg)] with fuel gauge retainer

remaining open and check that the pressure is applicable.

SEF968X

OK or NG

䊳

GO TO 11.

䊳

Replace refueling EVAP vapor cut valve with fuel tank.

ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTION

On Board Refueling Vapor Recovery (ORVR) (Cont’d)

EC-50

CHECK REFUELING EVAP VAPOR CUT VALVE

Without CONSULT-II

1. Remove fuel tank. Refer to FE-4, “FUEL SYSTEM”.
2. Drain fuel from the tank as follows:
a. Remove fuel gauge retainer.
b. Drain fuel from the tank using a hand pump into a fuel container.
3. Check refueling EVAP vapor cut valve for being stuck to close as follows.

Blow air into the refueling EVAP vapor cut valve (from hose end B), and check that the air flows freely into the tank.

4. Check EVAP vapor cut valve for being stuck to open as follows.
a. Connect vacuum pump to hose ends A and B using a suitable 3-way connector.
b. Remove fuel gauge retainer with fuel gauge unit.

Always replace O-ring with new one.

c. Put fuel tank upside down.
d. Apply vacuum pressure to both hose ends A and B [−13.3 kPa (−100 mmHg, −3.94 inHg)] with fuel gauge retainer

remaining open and check that the pressure is applicable.

SEF968X

OK or NG

䊳

GO TO 11.

䊳

Replace refueling EVAP vapor cut valve with fuel tank.

CHECK FUEL FILLER TUBE

Check filler neck tube and hose connected to the fuel tank for clogging, dents and cracks.

OK or NG

䊳

GO TO 12.

䊳

Replace fuel filler tube.

CHECK ONE-WAY FUEL VALVE-I

Check one-way valve for clogging.

OK or NG

䊳

GO TO 13.

䊳

Repair or replace one-way fuel valve with fuel tank.

IDX

ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTION

On Board Refueling Vapor Recovery (ORVR) (Cont’d)

EC-51

CHECK ONE-WAY FUEL VALVE-II

1. Make sure that fuel is drained from the tank.
2. Remove fuel filler tube and hose.
3. Check one-way fuel valve for operation as follows.

When a stick is inserted, the valve should open, when removing stick it should close.

SEF665U

Do not drop any material into the tank.

OK or NG

䊳

INSPECTION END

䊳

Replace fuel filler tube or replace one-way fuel valve with fuel tank.

Positive Crankcase Ventilation

DESCRIPTION

NHEC0021

SEC921C

SEC481D

This system returns blow-by gas to the intake manifold.
The positive crankcase ventilation (PCV) valve is provided to con-
duct 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 ventilating air.
The ventilating air is then drawn from the air inlet tubes into the
crankcase. In this process the air passes through the hose con-
necting 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

ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTION

On Board Refueling Vapor Recovery (ORVR) (Cont’d)

EC-52

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
conditions.

SEC137A

INSPECTION

NHEC0022

PCV (Positive Crankcase Ventilation) Valve

NHEC0022S01

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 fin-
ger is placed over valve inlet.

ET277

PCV Valve Ventilation Hose

NHEC0022S02

Check hoses and hose connections for leaks.

Disconnect all hoses and clean with compressed air. If any
hose cannot be freed of obstructions, replace.

CAN Communication

NHEC1183

SYSTEM DESCRIPTION

NHEC1183S01

CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many
electronic control units are equipped onto a vehicle, and each control unit shares information and links with
other control units during operation (not independent). In CAN communication, control units are connected with
2 communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wir-
ing. Each control unit transmits/receives data but selectively reads required data only.

For TCS Models

NHEC1183S0102

System Diagram

SEL449Y

IDX

ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTION

Positive Crankcase Ventilation (Cont’d)

EC-53

Input/Output Signal Chart
T: Transmit R: Receive

Signals

ECM

ABS/TCS control unit

TCM

Accelerator pedal position signal

Output shaft revolution signal

TCS self-diagnostic signal

ABS self-diagnostic signal

For VDC Models

NHEC1183S0104

System Diagram

SEL559YA

Input/output Signal Chart
T: Transmit R: Receive

Signals

ECM

Steering angle sen-

sor

VDC/TCS/ABS con-

trol unit

TCM

Output shaft revolution signal

VDC/TCS self-diagnostic signal

ABS self-diagnostic signal

Engine speed signal

Accelerator pedal position signal

Steering angle sensor signal

Automatic Speed Control Device (ASCD)
System

DESCRIPTION

NHEC1184

Input/Output Signal Chart

NHEC1184S01

Sensor

Input signal to ECM

ECM function

Actuator

ASCD brake switch

Brake pedal operation

ASCD vehicle speed
control

Electric throttle control
actuator

Stop lamp switch

Brake pedal operation

ASCD steering switch

ASCD steering switch operation

Park/Neutral position (PNP) switch

Gear position

Combination meter

Vehicle speed

TCM

Power train revolution

ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTION

CAN Communication (Cont’d)

EC-54

Basic ASCD System

NHEC1184S02

Refer to Owner’s Manual for ASCD operating instructions.
Automatic Speed Control Device (ASCD) allows a driver to keep vehicle at predetermined constant speed
without depressing accelerator pedal. Driver can set vehicle speed in advance between approximately 40 km/h
(25 MPH) and 144 km/h (89 MPH).
ECM controls throttle valve operating angle of electric throttle control actuator to regulate engine speed.
Operation status of ASCD is indicated by CRUISE indicator and SET indicator in combination meter.
If any malfunction occurs in ASCD system, it automatically deactivates control.

Set Operation

NHEC1184S03

Press ASCD CRUISE switch (Main switch). (Then CRUISE indicator in combination meter illuminates.)
When vehicle speed reaches a desired speed between approximately 40 km/h (25 MPH) and 144 km/h (89
MPH), press SET switch. (Then SET indicator in combination meter illuminates.)

Accel Operation

NHEC1184S04

If the RESUME/ACCEL switch is depressed during cruise control driving, increase the vehicle speed until the
switch is released or vehicle speed reaches maximum speed controlled by the system.
And then ASCD will keep the new set speed.

Cancel Operation

NHEC1184S05

When any of following conditions exist, cruise operation will be canceled.

쐌

CANCEL switch is depressed.

쐌

More than 2 switches at ASCD steering switch are depressed at the same time (Set speed will be cleared.).

쐌

Brake pedal is depressed.

쐌

A/T selector lever is shifted to P, N or R position.

쐌

Vehicle speed decreased to 13 km/h (8 MPH) lower than the set speed

쐌

TCS system is operated

If MAIN switch is turned to OFF while ASCD is activated, all of ASCD operations will be canceled and vehicle
speed memory will be erased.

Coast Operation

NHEC1184S06

When the SET/COAST switch is depressed during cruise control driving, decrease vehicle set speed until the
switch is released. And then ASCD will keep the new set speed.

Resume Operation

NHEC1184S07

When the RESUME/ACCEL switch is depressed after cancel operation other than depressing MAIN switch is
performed, vehicle speed will return to last set speed. To resume vehicle set speed, vehicle condition must
meet following conditions.

쐌

Brake pedal is released.

쐌

A/T selector lever is in other than P, N and R positions.

쐌

Vehicle speed is greater than 40 km/h (25 MPH) and 144 km/h (89 MPH).

IDX

ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTION

Automatic Speed Control Device (ASCD) System (Cont’d)

EC-55

SEF289X

SEF214Y

Fuel Pressure Release

NHEC0023

Before disconnecting fuel line, release fuel pressure from fuel
line to eliminate danger.

WITH CONSULT-II

NHEC0023S01

Turn ignition switch “ON”.

Perform “FUEL PRESSURE RELEASE” in “WORK SUP-
PORT” mode with CONSULT-II.

Start engine.

After engine stalls, crank it two or three times to release all fuel
pressure.

Turn ignition switch “OFF”.

SEF997Z

WITHOUT CONSULT-II

NHEC0023S02

Remove fuel pump fuse located in fuse box.

Start engine.

After engine stalls, crank it two or three times to release all fuel
pressure.

Turn ignition switch “OFF”.

Reinstall fuel pump fuse after servicing fuel system.

SEC997C

Fuel Pressure Check

NHEC0024

쐌

When reconnecting fuel line, always use new clamps.

쐌

Make sure that clamp screw does not contact adjacent
parts.

쐌

Use a torque driver to tighten clamps.

쐌

Use Pressure Gauge to check fuel pressure.

Release fuel pressure to zero.

Disconnect fuel tube joint between fuel damper and injector
tube and set fuel pressure check adapter (J44321).

SEC998C

Install pressure gauge to the fuel pressure check adapter as
shown in the figure.

Start engine and check for fuel leakage.

Read the indication of fuel pressure gauge.

At idling: Approximately 350 kPa (3.57 kg/cm

, 51 psi)

If results are unsatisfactory, go to next step.

Check the following.

쐌

Fuel hoses and fuel tubes for clogging

쐌

Fuel filter for clogging

쐌

Fuel pump

BASIC SERVICE PROCEDURE

Fuel Pressure Release

EC-56

쐌

Fuel pressure regulator for clogging
If OK, replace fuel pressure regulator.
If NG, repair or replace.

SEC030D

SEF703X

Injector

REMOVAL AND INSTALLATION

NHEC0026

Release fuel pressure to zero.

Remove intake manifold collector. Refer to EM-29, “TIMING
CHAIN”.

Remove fuel tube assemblies in numerical sequence as
shown in the figure at left.

Expand and remove clips securing fuel injectors.

Extract fuel injectors straight from fuel tubes.

쐌

Be careful not to damage injector nozzles during removal.

쐌

Do not bump or drop fuel injectors.

Carefully install O-rings.

쐌

Lubricate O-rings with a smear of engine oil.

쐌

Be careful not to damage O-rings with service tools, fin-
ger nails or clips. Do not expand or twist O-rings.

쐌

Discard old clips; replace with new ones.

Position clips in grooves on fuel injectors.

쐌

Make sure that protrusions of fuel injectors are aligned
with cutouts of clips after installation.

IDX

BASIC SERVICE PROCEDURE

Fuel Pressure Check (Cont’d)

EC-57

SEC031D

Align protrusions of fuel tubes with those of fuel injectors.
Insert fuel injectors straight into fuel tubes.

After properly inserting fuel injectors, check to make sure that
fuel tube protrusions are engaged with those of fuel injectors,
and that flanges of fuel tubes are engaged with clips.

SEC999C

10. Tighten fuel tube assembly mounting nuts in numerical

sequence (indicated in the figure at left) and in two stages.

: Tightening torque N·m (kg-m, ft-lb)

1st stage:

9.3 - 10.8 (1.0 - 1.1, 6.9 - 7.9)

2nd stage:

20.6 - 26.5 (2.1 - 2.7, 16 - 19)

11. Install all parts removed in reverse order of removal.

CAUTION:

After properly connecting fuel tube assembly to injector and
fuel hose, check connection for fuel leakage.

SEF058Y

How to Check Idle Speed and Ignition Timing

NHEC1422

IDLE SPEED

NHEC1422S01

쐌

Using CONSULT-II

Check idle speed in “DATA MONITOR” mode with CONSULT-II.

BASIC SERVICE PROCEDURE

Injector (Cont’d)

EC-58

SEC001D

IGNITION TIMING

NHEC1422S02

Any of following two methods may be used.

쐌

Method A

Attach timing light to loop wire as shown.

Check ignition timing.

SEC002D

쐌

Method B

Attach timing light to No. 1 ignition coil harness as shown.

SEC004D

Check ignition timing.

Idle Speed/Ignition Timing/Idle Mixture Ratio
Adjustment

NHEC0028

PREPARATION

NHEC0028S01

1) Make sure that the following parts are in good order.

쐌

Battery

쐌

Ignition system

쐌

Engine oil and coolant levels

쐌

Fuses

쐌

ECM harness connector

쐌

Vacuum hoses

쐌

Air intake system
(Oil filler cap, oil level gauge, etc.)

쐌

Fuel pressure

쐌

Engine compression

쐌

Throttle valve

쐌

Evaporative emission system

2) On air conditioner equipped models, checks should be carried out while the air conditioner is “OFF”.
3) On automatic transmission equipped models, when checking idle rpm, ignition timing and mixture ratio,

checks should be carried out while shift lever is in “N” position.

4) When measuring “CO” percentage, insert probe more than 40 cm (15.7 in) into tail pipe.
5) Turn off headlamps, heater blower, rear defogger.

IDX

BASIC SERVICE PROCEDURE

How to Check Idle Speed and Ignition Timing (Cont’d)

EC-59

6) Keep front wheels pointed straight ahead.
7) Make the check after the cooling fan has stopped.

BASIC SERVICE PROCEDURE

Idle Speed/Ignition Timing/Idle Mixture Ratio Adjustment (Cont’d)

EC-60

Overall Inspection Sequence

NHEC0028S0101

SEC154D

IDX

BASIC SERVICE PROCEDURE

Idle Speed/Ignition Timing/Idle Mixture Ratio Adjustment (Cont’d)

EC-61

INSPECTION PROCEDURE

=NHEC0028S02

INSPECTION START

1. Check service records for any recent repairs that may indicate a related malfunction, or a current need for scheduled

maintenance.

2. Open engine hood and check the following:
–

Harness connectors for improper connections

–

Wiring harness for improper connections, pinches and cut

–

Vacuum hoses for splits, kinks and improper connections

–

Hoses and ducts for leaks

–

Air cleaner clogging

–

Gasket

SEF983U

3. Confirm that electrical or mechanical loads are not applied.
–

Headlamp switch is OFF.

–

Air conditioner switch is OFF.

–

Rear window defogger switch is OFF.

–

Steering wheel is in the straight-ahead position, etc.

4. Start engine and warm it up until engine coolant temperature indicator points the middle of gauge.

Ensure engine stays below 1,000 rpm.

SEF976U

5. Run engine at about 2,000 rpm for about 2 minutes under no-load.

SEF977U

6. Make sure that no DTC is displayed with CONSULT-II or GST.

OK or NG

䊳

GO TO 3.

䊳

GO TO 2.

REPAIR OR REPLACE

Repair or replace components as necessary according to corresponding “Diagnostic Procedure”.

䊳

GO TO 3.

BASIC SERVICE PROCEDURE

Idle Speed/Ignition Timing/Idle Mixture Ratio Adjustment (Cont’d)

EC-62

CHECK TARGET IDLE SPEED

With CONSULT-II

1. Run engine at about 2,000 rpm for about 2 minutes under no-load.
2. Rev engine (2,000 to 3,000 rpm) two or three times under no-load, then run engine at idle speed for about 1 minute.

SEF978U

3. Read idle speed in “DATA MONITOR” mode with CONSULT-II.

SEF058Y

675

50 rpm (in “P” or “N” position)

Without CONSULT-II

1. Run engine at about 2,000 rpm for about 2 minutes under no-load.
2. Rev engine (2,000 to 3,000 rpm) two or three times under no-load, then run engine at idle speed for about 1 minute.
3. Check idle speed.

675

50 rpm (in “P” or “N” position)

OK or NG

䊳

GO TO 10.

䊳

GO TO 4.

PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING

1. Stop engine.
2. Perform “Accelerator Pedal Released Position Learning”, EC-71.

䊳

GO TO 5.

PERFORM THROTTLE VALVE CLOSED POSITION LEARNING

Perform “Throttle Valve Closed Position Learning”, EC-71.

䊳

GO TO 6.

PERFORM IDLE AIR VOLUME LEARNING

Perform “Idle Air Volume Learning”, EC-71.
Is Idle Air Volume Learning carried out successfully?

Yes or No

Yes

䊳

GO TO 7.

䊳

1. Follow the instruction of “Idle Air Volume Learning”.
2. GO TO 4.

IDX

BASIC SERVICE PROCEDURE

Idle Speed/Ignition Timing/Idle Mixture Ratio Adjustment (Cont’d)

EC-63

CHECK TARGET IDLE SPEED AGAIN

With CONSULT-II

1. Start engine and warm it up to normal operating temperature.
2. Read idle speed in “DATA MONITOR” mode with CONSULT-II.

675

50 rpm (in “P” or “N” position)

Without CONSULT-II

1. Start engine and warm it up to normal operating temperature.
2. Check idle speed.

675

50 rpm (in “P” or “N” position)

OK or NG

䊳

GO TO 10.

䊳

GO TO 8.

DETECT MALFUNCTIONING PART

Check the following.

쐌

Check camshaft position sensor (PHASE) and circuit. Refer to ”DTC P0340, P0345 CMP SENSOR (PHASE)”, EC-317.

쐌

Check crankshaft position sensor (POS) and circuit. Refer to “DTC P0335 CKP SENSOR (POS)”, EC-310.

OK or NG

䊳

GO TO 9.

䊳

1. Repair or replace.
2. GO TO 4.

CHECK ECM FUNCTION

1. Substitute another known-good ECM to check ECM function. (ECM may be the cause of an incident, but this is a rare

case.)

2. Perform initialization of IVIS (NATS) system and registration of all IVIS (NATS) ignition key IDs. Refer to IVIS (INFINITI

VEHICLE IMMOBILIZER SYSTEM — NATS)”, EC-90.

䊳

GO TO 4.

CHECK IGNITION TIMING

1. Run engine at idle.
2. Check ignition timing with a timing light.

SEC004D

15°

5° BTDC (in “P” or “N” position)

OK or NG

OK (With CONSULT-II)

䊳

GO TO 19.

OK (Without CONSULT-
II)

䊳

GO TO 20.

䊳

GO TO 11.

BASIC SERVICE PROCEDURE

Idle Speed/Ignition Timing/Idle Mixture Ratio Adjustment (Cont’d)

EC-64

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Infiniti I30. Emission Control System (2003 year). Manual — part 4

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