Infiniti Q45. Manual - part 442

 

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Infiniti Q45. Manual - part 442

 

 

DTC P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

EC-407

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EC

Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-II.

CAUTION:

Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.

: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

45

L/Y

EVAP canister purge vol-
ume control solenoid valve

[Engine is running]

Idle speed

BATTERY VOLTAGE

(11 - 14V)

[Engine is running]

Engine speed: About 2,000 rpm (More than 
100 seconds after starting engine)

11 - 14V

111

W/B

ECM relay
(Self shut-off)

[Engine is running]
[Ignition switch: OFF]

For a few seconds after turning ignition 
switch OFF

0 - 1.5V

[Ignition switch: OFF]

More than a few seconds after turning igni-
tion switch OFF

BATTERY VOLTAGE
(11 - 14V)

119

120

R
R

Power supply for ECM

[Ignition switch: ON]

BATTERY VOLTAGE
(11 - 14V)

PBIB0050E

PBIB0051E

EC-408

DTC P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

Diagnostic Procedure

NBS0022T

1. 

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE POWER SUPPLY CIR-

CUIT

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 1 and ground with CONSULT-II or tester.

OK or NG

OK

>> GO TO 3.

NG

>> GO TO 2.

2. 

DETECT MALFUNCTIONING PART

Check the following.

Harness connectors M135, F105

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

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

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

3. 

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OUTPUT SIGNAL CIR-

CUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check harness continuity between ECM terminal 45 and EVAP canister purge volume control solenoid
valve terminal 2.
Refer to Wiring Diagram.

4.

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

OK or NG

OK

>> GO TO 4.

NG

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

PBIB3130E

Voltage: Battery voltage

PBIB0148E

Continuity should exist.

DTC P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

EC-409

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EC

4. 

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR

1.

Disconnect EVAP control system pressure sensor harness connector.

2.

Check connectors for water.

OK or NG

OK

>> GO TO 5.

NG

>> Replace EVAP control system pressure sensor.

5. 

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR

Refer to 

EC-442, "Component Inspection"

 .

OK or NG

OK (With CONSULT-II)>>GO TO 6.
OK (Without CONSULT-II)>>GO TO 7.
NG

>> Replace EVAP control system pressure sensor.

6. 

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

 With CONSULT-II

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-II. Check that engine speed varies according to the
valve opening.

OK or NG

OK

>> GO TO 8.

NG

>> GO TO 7.

7. 

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

Refer to 

EC-411, "Component Inspection"

 .

OK or NG

OK

>> GO TO 8.

NG

>> Replace EVAP canister purge volume control solenoid valve.

8. 

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

OK

>> GO TO 9.

NG

>> Clean the rubber tube using an air blower.

9. 

CHECK EVAP CANISTER VENT CONTROL VALVE

Refer to 

EC-435, "Component Inspection"

 .

OK or NG

OK

>> GO TO 10.

NG

>> Replace EVAP canister vent control valve.

Water should not exist.

PBIB1678E

EC-410

DTC P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

10. 

CHECK IF EVAP CANISTER SATURATED WITH WATER

1.

Remove EVAP canister with EVAP canister vent control valve attached.

2.

Does water drain from the EVAP canister.

Yes or No

Yes

>> GO TO 11.

No

>> GO TO 14.

11. 

CHECK EVAP CANISTER

Weigh the EVAP canister with the EVAP canister vent control valve attached.
The weight should be less than 1.8 kg (4.0 lb).

OK or NG

OK

>> GO TO 13.

NG

>> GO TO 12.

12. 

DETECT MALFUNCTIONING PART

Check the following.

EVAP canister for damage

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

>> Repair hose or replace EVAP canister.

13. 

CHECK WATER SEPARATOR

Refer to 

EC-553, "Component Inspection"

 .

OK or NG

OK

>> GO TO 14.

NG

>> Clean or replace water separator.

14. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-145, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

>> INSPECTION END

SEF596U

 

 

 

 

 

 

 

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