Nissan Qashqai (2007-2010). Manual — part 325

P0420 THREE WAY CATALYST FUNCTION

EC-819

< COMPONENT DIAGNOSIS >

[MR20DE (WITH EURO-OBD)]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

NO

>> Check ignition coil, power transistor and their circuits. Refer to

EC-929, "Diagnosis Procedure"

.

8.

CHECK SPARK PLUG

Check the initial spark plug for fouling, etc.

Is the inspection result normal?

YES

>> Replace spark plug(s) with standard type one(s). For

spark plug type, refer to

EM-160, "Removal and Installa-

tion"

.

NO

>> Repair or clean spark plug. Then GO TO 9.

9.

CHECK FUNCTION OF IGNITION COIL-III

1.

Reconnect the initial spark plugs.

2.

Crank engine for about three seconds, and recheck whether spark is generated between the spark plug
and the grounded portion.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace spark plug(s) with standard type one(s). For spark plug type, refer to

EM-160, "Removal

and Installation"

.

10.

CHECK FUEL INJECTOR

1.

Turn ignition switch OFF.

2.

Remove fuel injector assembly.
Refer to

EM-155, "Removal and Installation"

.

Keep fuel hose and all fuel injectors connected to fuel tube.

3.

Disconnect all ignition coil harness connectors.

4.

Reconnect all fuel injector harness connectors disconnected.

5.

Turn ignition switch ON.

Does fuel drip from fuel injector?

YES

>> GO TO 11.

NO

>> Replace the fuel injector(s) from which fuel is dripping.

11.

CHECK INTERMITTENT INCIDENT

Refer to

GI-39, "Intermittent Incident"

.

Is the trouble fixed?

YES

>> INSPECTION END

NO

>> Replace three way catalyst assembly.

SEF156I

Spark should be generated.

EC-820

< COMPONENT DIAGNOSIS >

[MR20DE (WITH EURO-OBD)]

P0444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

P0444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

Description

INFOID:0000000001089391

The EVAP canister purge volume control solenoid valve uses a ON/
OFF duty to control the flow rate of fuel vapor from the EVAP canis-
ter. 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.

DTC Logic

INFOID:0000000001089392

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

CONDITIONING

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.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

1.

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

2.

Check 1st trip DTC.

Is 1st trip DTC detected?

YES

>> Go to

EC-822, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000001089393

1.

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 the voltage between EVAP canister purge volume control solenoid valve harness connector and
ground.

Is the inspection result normal?

PBIA9215J

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0444

EVAP canister purge volume
control solenoid valve circuit
open

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

• Harness or connectors

(The solenoid valve circuit is open or
shorted.)

• EVAP canister purge volume control so-

lenoid valve

EVAP canister purge volume

control solenoid valve

Ground

Voltage

Connector

Terminal

F32

1

Ground

Battery voltage

P0444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

EC-821

< COMPONENT DIAGNOSIS >

[MR20DE (WITH EURO-OBD)]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

YES

>> GO TO 3.

NO

>> GO TO 2.

2.

DETECT MALFUNCTIONING PART

Check the following.
• Harness connectors E7, F121
• 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 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 CIRCUIT

FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check the continuity between EVAP canister purge volume control solenoid valve harness connector and
ECM harness connector.

4.

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

Is the inspection result normal?

YES-1 >> With CONSULT-III: GO TO 4.
YES-2 >> Without CONSULT-III: GO TO 5.
NO

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

4.

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION

With CONSULT-III

1.

Reconnect all harness connectors disconnected.

2.

Start engine.

3.

Perform “PURG VOL CONT/V” in “ACTIVE TEST” mode with CONSULT-III. Check that engine speed var-
ies according to the valve opening.

Does engine speed vary according to the value opening?

YES

>> GO TO 6.

NO

>> GO TO 5.

5.

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

Refer to

EC-823, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Replace EVAP canister purge volume control solenoid valve.

6.

CHECK INTERMITTENT INCIDENT

Refer to

GI-39, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000001089394

1.

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

With CONSULT-III

1.

Turn ignition switch OFF.

2.

Reconnect all harness connectors disconnected.

3.

Disconnect EVAP purge hoses connected to EVAP canister purge volume control solenoid valve.

EVAP canister purge volume

control solenoid valve

ECM

Continuity

Connector

Terminal

Connector

Terminal

F32

2

F7

9

Existed

EC-822

< COMPONENT DIAGNOSIS >

[MR20DE (WITH EURO-OBD)]

P0444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

4.

Turn ignition switch ON.

5.

Select “PURG VOL CONT/V” in “ACTIVE TEST” mode with CONSULT-III.

6.

Touch “Qd” and “Qu” on CONSULT-III screen to adjust “PURG
VOL CONT/V” opening and check air passage continuity of
EVAP canister purge volume control solenoid valve under the
following conditions.

Without CONSULT-III

1.

Turn ignition switch OFF.

2.

Disconnect EVAP canister purge volume control solenoid valve harness connector.

3.

Disconnect EVAP purge hoses connected to EVAP canister purge volume control solenoid valve.

4.

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

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace EVAP canister purge volume control solenoid valve

Condition

(PURG VOL CONT/V value)

Air passage continuity

between (A) and (B)

100%

Existed

0%

Not existed

Condition

Air passage continuity

between (A) and (B)

12V direct current supply between
terminals 1 and 2

Existed

No supply

Not existed

PBIA9668J