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Nissan Frontier. Manual - part 548

P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

EC-763

< DTC/CIRCUIT DIAGNOSIS >

[VQ40DE FOR USA AND CANADA]

P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

Description

INFOID:0000000009481418

SYSTEM DESCRIPTION

*1: ECM determines the start signal status by the signals of engine speed and battery voltage.
*2: This signal is sent to the ECM through CAN communication line.

This system controls flow rate of fuel vapor from the EVAP canister. The opening of the vapor by-pass pas-

sage in the EVAP canister 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 considering 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.

COMPONENT DESCRIPTION

The EVAP canister purge volume control solenoid valve is used 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.

On Board Diagnosis Logic

INFOID:0000000009481419

Sensor

Input Signal to ECM

ECM function

Actuator

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

Engine speed*

EVAP canister
purge flow control

EVAP canister purge vol-
ume control solenoid valve

Mass air flow sensor

Amount of intake air

Engine coolant temperature sensor

Engine coolant temperature

Battery

Battery voltage*

Throttle position sensor

Throttle position

Accelerator pedal position sensor

Accelerator pedal position

Air fuel ratio (A/F) sensor 1

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

Fuel tank temperature sensor

Fuel temperature in fuel tank

Wheel sensor

Vehicle speed*

PBIB2057E

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0443
0443

EVAP canister purge
volume control solenoid
valve

The canister purge flow is detected during
the vehicle is stopped while the engine is
running, even when EVAP canister purge
volume control solenoid valve is completely
closed.

• EVAP control system pressure sensor
• EVAP canister purge volume control so-

lenoid valve
(EVAP canister purge volume control so-
lenoid valve is stuck open.)

• EVAP canister vent control valve
• Drain filter
• EVAP canister
• Hoses

(Hoses are connected incorrectly or
clogged.)

The canister purge flow is detected during
the specified driving conditions, even when
EVAP canister purge volume control sole-
noid valve is completely closed.

EC-764

< DTC/CIRCUIT DIAGNOSIS >

[VQ40DE FOR USA AND CANADA]

P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

DTC Confirmation Procedure

INFOID:0000000009481420

Perform PROCEDURE FOR MALFUNCTION A first.

If the DTC cannot be confirmed, perform PROCEDURE FOR MALFUNCTION B.

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.

PROCEDURE FOR MALFUNCTION A

TESTING CONDITION:

• Perform “DTC Confirmation Procedure” when the fuel level is between 1/4 and 3/4 full, and vehicle is placed

on flat level surface.

• Always perform test at a temperature of 5 to 60

°C (41 to 140°F).

• Cool the vehicle so that engine coolant temperature becomes same level as ambient temperature.

With CONSULT

1. Turn ignition switch ON and select “DATA MONITOR” mode with CONSULT.
2. Check that the following condition are met.

FUEL T/TMP SE: 0 – 35

°C (32 – 95°F)

3. Start engine and wait at least 60 seconds.
4. Check 1st trip DTC.
5. If 1st trip DTC is detected, go to

EC-765, "Diagnosis Procedure"

With GST

1. Turn ignition switch ON.
2. Set voltmeter probes to ECM terminal 111 (FTT sensor signal) and ground.
3. Check that the voltage is 3.1 – 4.2 V.
4. Start engine and wait at least 60 seconds.
5. Check 1st trip DTC.
6. If 1st trip DTC is detected, go to

EC-765, "Diagnosis Procedure"

PROCEDURE FOR MALFUNCTION B

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:

Always perform test at a temperature of 5

°C (41°F) or more.

With CONSULT

1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Turn ignition switch ON.
4. Select “PURG VOL CN/V P1444” of “EVAPORATIVE SYSTEM” in “DTC WORK SUPPORT” mode with

CONSULT.

5. Touch “START”.
6. Start engine and let it idle until “TESTING” on CONSULT changes to “COMPLETED”. (It will take approxi-

mately 10 seconds.)

If “TESTING” is not displayed after 5 minutes, retry from step 2.

7. Check that “OK” is displayed after touching “SELF-DIAG RESULTS”. If “NG” is displayed, refer to

EC-765,

"Diagnosis Procedure"

With GST

1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Start engine and let it idle for at least 20 seconds.
4. Select Service $07 with GST.
5. If 1st trip DTC is detected, go to

EC-765, "Diagnosis Procedure"

P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

EC-765

< DTC/CIRCUIT DIAGNOSIS >

[VQ40DE FOR USA AND CANADA]

Diagnosis Procedure

INFOID:0000000009481421

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.

3. Turn ignition switch ON.

4. Check voltage between EVAP canister purge volume control solenoid valve terminal 2 and ground with

CONSULT or tester.

OK or NG

>> GO TO 3.

>> GO TO 2.

DETECT MALFUNCTIONING PART

Check the following.

• Harness connectors E2, F32

• Harness for open or short between EVAP canister purge volume control solenoid valve and IPDM E/R

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

>> Repair harness or connectors.

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 42 and EVAP canister purge volume control solenoid

valve terminal 1. Refer to Wiring Diagram.

4. Also check harness for short to ground and short to power.
OK or NG

>> GO TO 4.

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

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR

1. Disconnect EVAP control system pressure sensor harness connector.

2. Check connectors for water.

OK or NG

>> GO TO 5.

>> Replace EVAP control system pressure sensor. Refer to

FL-14, "Removal and Installation"

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR

Refer to

EC-786, "Component Inspection"

BBIA0550E

Voltage: Battery voltage

Continuity should exist.

Water should not exist.

EC-766

< DTC/CIRCUIT DIAGNOSIS >

[VQ40DE FOR USA AND CANADA]

P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

OK or NG

OK (With CONSULT)>>GO TO 6.

OK (Without CONSULT)>>GO TO 7.

>> Replace EVAP control system pressure sensor. Refer to

FL-14, "Removal and Installation"

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

With CONSULT

1. Turn ignition switch OFF.

2. Reconnect harness connectors disconnected.

3. Start engine.

4. Perform “PURG VOL CONT/V” in “ACTIVE TEST” mode with CONSULT. Check that engine speed varies

according to the valve opening.

OK or NG

>> GO TO 8.

>> GO TO 7.

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

Refer to

EC-767, "Component Inspection"

OK or NG

>> GO TO 8.

>> Replace EVAP canister purge volume control solenoid valve. Refer to

FL-14, "Removal and

Installation"

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

>> GO TO 9.

>> Clean the rubber tube using an air blower.

CHECK DRAIN FILTER

Refer to

EC-762, "Component Inspection"

OK or NG

>> GO TO 10.

>> Replace drain filter.

10.

CHECK EVAP CANISTER VENT CONTROL VALVE

Refer to

EC-774, "Component Inspection"

OK or NG

>> GO TO 11.

>> Replace EVAP canister vent control valve. Refer to

FL-14, "Removal and Installation"

11.

CHECK IF EVAP CANISTER IS SATURATED WITH WATER

1. Remove EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor

attached.

2. Check if water will drain from the EVAP canister.
Yes or No

Yes

>> GO TO 12.

>> GO TO 14.

12.

CHECK EVAP CANISTER

BBIA0558E

Content .. 546 547 548 549 ..