Infiniti I30 (A33). Manual — part 265

23

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-38.

OK or NG

OK

©

GO TO 24.

NG

©

Repair or replace hoses and tubes.

24

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

OK

©

GO TO 25.

NG

©

Repair or replace hoses, tubes or filler neck tube.

25

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

OK

©

GO TO 26.

NG

©

Replace refueling control valve with fuel tank.

26

CHECK FUEL LEVEL SENSOR

Refer to EL-162, “Fuel Level Sensor Unit Check”.

OK or NG

OK

©

GO TO 27.

NG

©

Replace fuel level sensor unit.

GI

MA

EM

LC

FE

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

DTC P0440 EVAP CONTROL SYSTEM (SMALL LEAK) (NEGATIVE PRESSURE)

Diagnostic Procedure (Cont’d)

EC-375

27

CHECK INTERMITTENT INCIDENT

Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-144.

©

INSPECTION END

DTC P0440 EVAP CONTROL SYSTEM (SMALL LEAK) (NEGATIVE PRESSURE)

Diagnostic Procedure (Cont’d)

EC-376

Description

NHEC0221

SYSTEM DESCRIPTION

NHEC0221S01

Sensor

Input Signal to ECM

ECM

function

Actuator

Crankshaft position sensor (POS)

Engine speed (POS signal)

EVAP can-
ister purge
flow control

EVAP canister purge volume
control solenoid valve

Crankshaft position sensor (REF)

Engine speed (REF signal)

Mass air flow sensor

Amount of intake air

Engine coolant temperature sensor

Engine coolant temperature

Ignition switch

Start signal

Throttle position sensor

Throttle position

Throttle position switch

Closed throttle position

Heated oxygen sensors 1 (front)

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

NHEC0221S02

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

NHEC0222

Specification data are reference values.

MONITOR ITEM

CONDITION

SPECIFICATION

PURG VOL C/V

I

Engine: After warming up

I

Air conditioner switch “OFF”

I

Shift lever: “N”

I

No-load

Idle (Vehicle stopped)

0%

2,000 rpm

—

GI

MA

EM

LC

FE

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

DTC P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

(CIRCUIT)

Description

EC-377

On Board Diagnosis Logic

NHEC0224

Malfunction is detected when an improper voltage signal is sent to
ECM through the valve.

Possible Cause

NHEC0511

I

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

I

EVAP canister purge volume control solenoid valve

SEF058Y

DTC Confirmation Procedure

NHEC0225

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

NHEC0225S01

1)

Turn ignition switch “ON”.

2)

Select “DATA MONITOR” mode with CONSULT-II.

3)

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

4)

If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-380.

WITH GST

NHEC0225S02

Follow the proocedure “WITH CONSULT-II” above.

DTC P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

(CIRCUIT)

On Board Diagnosis Logic

EC-378