Infiniti I30. Emission Control System (2003 year). Manual - part 23

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR

1. Remove EVAP control system pressure sensor with its harness connector connected.

CAUTION:

Never apply force to the air hole protector of the sensor if equipped.

SEF799W

2. Remove hose from EVAP control system pressure sensor.
3. Turn ignition switch “ON”.
4. Use pump to apply vacuum and pressure to EVAP control system pressure sensor as shown in figure.

CAUTION:

쐌

Always calibrate the vacuum pump gauge when using it.

쐌

Do not apply below −20 kPa (−150 mmHg, −5.91 inHg) or over 20 kPa (150 mmHg, 5.91 inHg) of pressure.

5. Check input voltage between ECM terminal 60 and ground.

SEC908C

MTBL1159

CAUTION:

Discard and EVAP control system pressure sensor which has been dropped from a height of more than 0.5 m
(19.7 in) onto a hard surface such as a concrete floor; use a new one.

OK or NG

䊳

GO TO 20.

䊳

Replace EVAP control system pressure sensor.

CHECK EVAP PURGE LINE

Check EVAP purge line (pipe, rubber tube, fuel tank and EVAP canister) for cracks or improper connection.
Refer to “Evaporative Emission System”, EC-37.

OK or NG

䊳

GO TO 21.

䊳

Repair or reconnect the hose.

IDX

DTC P0442 EVAP CONTROL SYSTEM

Diagnostic Procedure (Cont’d)

EC-353

CLEAN EVAP PURGE LINE

Clean EVAP purge line (pipe and rubber tube) using air blower.

䊳

GO TO 22.

CHECK REFUELING EVAP VAPOR LINE

Check refueling EVAP vapor line between EVAP canister and fuel tank for clogging, kink, looseness and improper connec-
tion. For location, refer to “ON BOARD REFUELING VAPOR RECOVERY (ORVR)”, EC-43.

OK or NG

䊳

GO TO 23.

䊳

Repair or replace hoses and tubes.

CHECK SIGNAL LINE AND RECIRCULATION LINE

Check signal line and recirculation line between filler neck tube and fuel tank for clogging, kink, cracks, looseness and
improper connection.

OK or NG

䊳

GO TO 24.

䊳

Repair or replace hoses, tubes or filler neck tube.

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.

SEF830X

OK or NG

䊳

GO TO 25.

䊳

Replace refueling control valve with fuel tank.

DTC P0442 EVAP CONTROL SYSTEM

Diagnostic Procedure (Cont’d)

EC-354

CHECK FUEL LEVEL SENSOR

Refer to EL-140, “Fuel Level Sensor Unit Check”.

OK or NG

䊳

GO TO 26.

䊳

Replace fuel level sensor unit.

CHECK INTERMITTENT INCIDENT

Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-151.

䊳

INSPECTION END

IDX

DTC P0442 EVAP CONTROL SYSTEM

Diagnostic Procedure (Cont’d)

EC-355

Description

NHEC0963

SYSTEM DESCRIPTION

NHEC0963S01

Sensor

Input Signal to ECM

ECM

function

Actuator

Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)

Engine speed

EVAP can-
ister purge
flow control

EVAP canister purge volume
control solenoid valve

Mass air flow sensor

Amount of intake air

Engine coolant temperature sensor

Engine coolant temperature

Ignition switch

Start signal

Throttle position sensor

Throttle position

Accelerator pedal position sensor

Accelerator pedal position

Heated oxygen sensor 1

Density of oxygen in exhaust gas
(Mixture ratio feedback signal)

Fuel tank temperature sensor

Fuel temperature in fuel tank

Vehicle speed sensor

Vehicle speed

This system controls flow rate of fuel vapor from the EVAP canis-
ter. The opening of the vapor by-pass passage in the EVAP canis-
ter purge volume control solenoid valve changes to control the flow
rate. The EVAP canister purge volume control solenoid valve
repeats ON/OFF operation according to the signal sent from the
ECM. The opening of the valve varies for optimum engine control.
The optimum value stored in the ECM is determined by consider-
ing various engine conditions. When the engine is operating, the
flow rate of fuel vapor from the EVAP canister is regulated as the
air flow changes.

SEF337U

COMPONENT DESCRIPTION

NHEC0963S02

The EVAP canister purge volume control solenoid valve uses a
ON/OFF duty to control the flow rate of fuel vapor from the EVAP
canister. The EVAP canister purge volume control solenoid valve
is moved by ON/OFF pulses from the ECM. The longer the ON
pulse, the greater the amount of fuel vapor that will flow through the
valve.

CONSULT-II Reference Value in Data Monitor
Mode

NHEC0964

Specification data are reference values.

MONITOR ITEM

CONDITION

SPECIFICATION

PURG VOL C/V

쐌

Engine: After warming up

쐌

Air conditioner switch “OFF”

쐌

Shift lever: “N”

쐌

No-load

Idle (Vehicle stopped)

2,000 rpm

—

DTC P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID

VALVE

Description

EC-356

On Board Diagnosis Logic

NHEC0966

DTC No.

Trouble diagnosis

name

DTC Detecting Condition

Possible Cause

P0444
0444

EVAP canister purge
volume control sole-
noid valve circuit
open

An excessively low voltage signal is sent to ECM
through the valve.

쐌

Harness or connectors
(The solenoid valve circuit is open or
shorted.)

쐌

EVAP canister purge volume control
solenoid valve

P0445
0445

EVAP canister purge
volume control sole-
noid valve circuit
shorted

An excessively high voltage signal is sent to ECM
through the valve.

쐌

Harness or connectors
(The solenoid valve circuit is shorted.)

쐌

EVAP canister purge volume control
solenoid valve

SEF058Y

DTC Confirmation Procedure

NHEC0967

NOTE:
If “DTC Confirmation Procedure” has been previously conducted,
always turn ignition switch “OFF” and wait at least 10 seconds
before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm battery
voltage is more than 11V at idle.

WITH CONSULT-II

NHEC0967S01

Turn ignition switch “ON”.

Select “DATA MONITOR” mode with CONSULT-II.

Start engine and let it idle for at least 13 seconds.

If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-360.

WITH GST

NHEC0967S02

Follow the proocedure “WITH CONSULT-II” above.

IDX

DTC P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID

VALVE

On Board Diagnosis Logic

EC-357

Wiring Diagram

NHEC0968

MEC552D

DTC P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID

VALVE

Wiring Diagram

EC-358

SEC219D

IDX

DTC P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID

VALVE

Wiring Diagram (Cont’d)

EC-359

Diagnostic Procedure

NHEC0969

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE POWER SUPPLY CIRCUIT

1. Turn ignition switch “OFF”.
2. Disconnect EVAP canister purge volume control solenoid valve harness connector.

SEC929C

3. Turn ignition switch “ON”.
4. Check voltage between EVAP canister purge volume control solenoid valve terminal 2 and ground with CONSULT-II or

tester.

SEC062D

Voltage: Battery voltage

OK or NG

䊳

GO TO 3.

䊳

GO TO 2.

DETECT MALFUNCTIONING PART

Check the following.

쐌

Harness connectors E15, F18

쐌

Harness connectors F56, F197

쐌

Harness for open or short between EVAP canister purge volume control solenoid valve and ECM relay

䊳

Repair harness or connectors.

DTC P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID

VALVE

Diagnostic Procedure

EC-360

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OUTPUT SIGNAL CIRCUIT
FOR OPEN AND SHORT

1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 10 and EVAP canister purge volume control solenoid valve terminal 1.

Refer to Wiring Diagram.

Continuity should exist.

4. Also check harness for short to ground and short to power.

OK or NG

OK (With CONSULT-II)

䊳

GO TO 5.

OK (Without CONSULT-
II)

䊳

GO TO 6.

䊳

GO TO 4.

DETECT MALFUNCTIONING PART

Check the following.

쐌

Harness connectors F197, F58

쐌

Harness for open or short between EVAP canister purge volume control solenoid valve and ECM

䊳

Repair harness or connectors.

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION

With CONSULT-II

1. Start engine.
2. Perform “PURG VOL CONT/V” in “ACTIVE TEST” mode with CONSULT-II. Check that engine speed varies according

to the valve opening.

SEC142D

OK or NG

䊳

GO TO 7.

䊳

GO TO 6.

IDX

DTC P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID

VALVE

Diagnostic Procedure (Cont’d)

EC-361

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

With CONSULT-II

Check air passage continuity of EVAP canister purge volume control solenoid valve under the following conditions.

SEF334X

Without CONSULT-II

Check air passage continuity of EVAP canister purge volume control solenoid valve under the following conditions.

SEF335X

OK or NG

䊳

GO TO 7.

䊳

Replace EVAP canister purge volume control solenoid valve.

CHECK INTERMITTENT INCIDENT

Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-151.

䊳

INSPECTION END

DTC P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID

VALVE

Diagnostic Procedure (Cont’d)

EC-362

SEF381Z

SEF267X

Component Description

NHEC0970

The EVAP canister vent control valve is located on the EVAP can-
ister and is used to seal the canister vent.
This solenoid valve responds to signals from the ECM. When the
ECM sends an ON signal, the coil in the solenoid valve is ener-
gized. A plunger will then move to seal the canister vent. The abil-
ity to seal the vent is necessary for the on board diagnosis of other
evaporative emission control system components.
This solenoid valve is used only for diagnosis, and usually remains
opened.
When the vent is closed, under normal purge conditions, the
evaporative emission control system is depressurized and allows
“EVAP Control System (Small Leak)” diagnosis.

CONSULT-II Reference Value in Data Monitor
Mode

NHEC0971

Specification data are reference values.

MONITOR ITEM

CONDITION

SPECIFICATION

VENT CONT/V

쐌

Ignition switch: ON

OFF

On Board Diagnosis Logic

NHEC0973

DTC No.

Trouble diagnosis

name

DTC Detecting Condition

Possible Cause

P0447
0447

EVAP canister vent
control valve circuit
open

An improper voltage signal is sent to ECM through
EVAP canister vent control valve.

쐌

Harness or connectors
(The valve circuit is open or shorted.)

쐌

EVAP canister vent control valve

DTC Confirmation Procedure

NHEC0974

IDX

DTC P0447 EVAP CANISTER VENT CONTROL VALVE

Component Description

EC-363

SEF058Y

WITH CONSULT-II

NHEC0974S01

Turn ignition switch “ON”.

Select “DATA MONITOR” mode with CONSULT-II.

Start engine and wait at least 8 seconds.

If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-366.

WITH GST

NHEC0974S02

Follow the procedure “WITH CONSULT-II” above.

DTC P0447 EVAP CANISTER VENT CONTROL VALVE

DTC Confirmation Procedure (Cont’d)

EC-364

Wiring Diagram

=NHEC0975

MEC553D

SEF668XC

IDX

DTC P0447 EVAP CANISTER VENT CONTROL VALVE

Wiring Diagram

EC-365

Diagnostic Procedure

NHEC0976

INSPECTION START

1. Do you have CONSULT-II?

Yes or No

Yes

䊳

GO TO 2.

䊳

GO TO 3.

CHECK EVAP CANISTER VENT CONTROL VALVE CIRCUIT

With CONSULT-II

1. Turn ignition switch “OFF” and then turn “ON”.
2. Select “VENT CONTROL/V” in “ACTIVE TEST” mode with CONSULT-II.
3. Touch “ON/OFF” on CONSULT-II screen.

PBIB0151E

4. Check for operating sound of the valve.

Clicking noise should be heard.

OK or NG

䊳

GO TO 7.

䊳

GO TO 3.

DTC P0447 EVAP CANISTER VENT CONTROL VALVE

Diagnostic Procedure

EC-366

CHECK EVAP CANISTER VENT CONTROL VALVE POWER SUPPLY CIRCUIT

1. Turn ignition switch “OFF”.
2. Disconnect EVAP canister vent control valve harness connector.

SEF267X

3. Turn ignition switch “ON”.
4. Check voltage between EVAP canister vent control valve terminal 1 and ground with CONSULT-II or tester.

SEC061D

Voltage: Battery voltage

OK or NG

䊳

GO TO 5.

䊳

GO TO 4.

DETECT MALFUNCTIONING PART

Check the following.

쐌

Harness connectors M5, B1

쐌

Fuse block (J/B) connector M19

쐌

15A fuse

쐌

Harness for open or short between EVAP canister vent control valve and fuse

䊳

Repair harness or connectors.

CHECK EVAP CANISTER VENT CONTROL VALVE OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 105 and EVAP canister vent control valve terminal 2.

Refer to Wiring Diagram.

Continuity should exist.

4. Also check harness for short to ground and short to power.

OK or NG

䊳

GO TO 7.

䊳

GO TO 6.

IDX

DTC P0447 EVAP CANISTER VENT CONTROL VALVE

Diagnostic Procedure (Cont’d)

EC-367

DETECT MALFUNCTIONING PART

Check the following.

쐌

Harness connectors B3, M6

쐌

Harness connectors M81, F49

쐌

Harness for open or short between EVAP canister vent control valve and ECM

䊳

Repair open circuit or short to ground or short to power in harness or connectors.

CHECK RUBBER TUBE FOR CLOGGING

1. Disconnect rubber tube connected to EVAP canister vent control valve.
2. Check the rubber tube for clogging.

OK or NG

䊳

GO TO 8.

䊳

Clean the rubber tube using an air blower.

CHECK EVAP CANISTER VENT CONTROL VALVE-I

1. Remove EVAP canister vent control valve from EVAP canister.
2. Check portion B of EVAP canister vent control valve for being rusted.

SEF376Z

OK or NG

䊳

GO TO 9.

䊳

Replace EVAP canister vent control valve.

DTC P0447 EVAP CANISTER VENT CONTROL VALVE

Diagnostic Procedure (Cont’d)

EC-368

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