Nissan Qashqai J11. Manual - part 324

 

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Nissan Qashqai J11. Manual - part 324

 

 

P0420 THREE WAY CATALYST FUNCTION

ECM-273

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

C

D

E

F

G

H

I

J

K

L

M

A

ECM

N

P

O

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace error-detected parts. Refer to 

EX-11, "Exploded View"

.

2.

CHECK EXHAUST GAS LEAK

1.

Start engine and run it at idle.

2.

Listen for an exhaust gas leak before the three way catalyst (manifold).

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace error-detected parts. Refer to 

EX-11, "Exploded View"

.

3.

CHECK INTAKE AIR LEAK AND PCV HOSE

1.

Start engine and let it idle.

2.

Listen for an intake air leak after the mass air flow sensor.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace error-detected parts. Refer to 

EX-11, "Exploded View"

.

4.

CHECK IGNITION TIMING AND IDLE SPEED

Check the following items. Refer to 

ECM-132, "Work Procedure"

.

For specification, refer to 

ECM-417, "Ignition Timing"

For specification, refer to 

ECM-417, "Idle Speed"

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Follow the 

ECM-132, "Work Procedure"

.

5.

CHECK FUEL INJECTOR

Check the fuel injector. Refer to 

ECM-372, "Component Function Check"

.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Perform 

ECM-372, "Diagnosis Procedure"

.

6.

CHECK FUNCTION OF IGNITION COIL-1

CAUTION:

Do the following procedure in the place where ventilation is good without the combustible.
1.

Turn ignition switch OFF.

2.

Remove fuel pump fuse in IPDM E/R to release fuel pressure.
NOTE:
Do not use CONSULT to release fuel pressure, or fuel pressure applies again during the following proce-
dure.

3.

Start engine.

4.

After engine stalls, crank it two or three times to release all fuel pressure

5.

Turn ignition switch OFF.

6.

Remove all ignition coil harness connectors to avoid the electrical discharge from the ignition coils.

1:

Three way catalyst

2:

A/F sensor 1

3:

HO2S2

4:

Muffler

PBID0288J

ECM-274

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

P0420 THREE WAY CATALYST FUNCTION

7.

Remove ignition coil and spark plug of the cylinder to be checked. Refer to 

EM-170, "Removal and Instal-

lation"

.

8.

Crank engine for 5 seconds or more to remove combustion gas in the cylinder.

9.

Connect spark plug and harness connector to ignition coil.

10. Fix ignition coil using a rope etc. with gap of 13 - 17 mm (0.52 -

0.66 in) between the edge of the spark plug and grounded metal
portion as shown in the figure.

11. Crank engine for about 3 seconds, and check whether spark is

generated between the spark plug and the grounded metal por-
tion.

CAUTION:

• Do not approach to the spark plug and the ignition coil

within 50 cm (19.7 in). Be careful not to get an electrical
shock while checking, because the electrical discharge
voltage becomes 20 kV or more.

• It might cause to damage the ignition coil if the gap of

more than 17 mm (0.66 in) is taken.

NOTE:
When the gap is less than 13 mm (0.52 in), the spark might be generated even if the coil is malfunctioning.

Is the inspection result normal?

YES

>> GO TO 10.

NO

>> GO TO 7.

7.

CHECK FUNCTION OF IGNITION COIL-2

1.

Turn ignition switch OFF.

2.

Disconnect spark plug and connect a known-good spark plug.

3.

Crank engine for about 3 seconds, and recheck whether spark is generated between the spark plug and
the grounded metal portion.

Is the inspection result normal?

YES

>> GO TO 8.

NO

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

ECM-385, "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-248, "Spark Plug"

.

NO

>> Repair or clean spark plug. Refer to 

EM-170, "Exploded

View"

. Then GO TO 9.

9.

CHECK FUNCTION OF IGNITION COIL-3

1.

Reconnect the initial spark plugs.

2.

Crank engine for about 3 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-248, "Spark

Plug"

.

10.

CHECK FUEL INJECTOR

JMBIA0066GB

Spark should be generated.

SEF156I

Spark should be generated.

P0420 THREE WAY CATALYST FUNCTION

ECM-275

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

C

D

E

F

G

H

I

J

K

L

M

A

ECM

N

P

O

1.

Turn ignition switch OFF.

2.

Cool down the engine and make sure that there is no combustible objects around.

3.

Reconnect all harness connectors. 

4.

Remove fuel tube ASSY. Refer to 

EM-164, "Exploded View"

. Keep fuel hose and all fuel injectors con-

nected to fuel tube.

5.

Reconnect all fuel injector harness connectors disconnected.

6.

Disconnect all ignition coil harness connectors.

7.

Prepare pans or saucers under each fuel injector.

8.

Crank engine for about 3 seconds.

Is the inspection result normal?

YES

>> Replace three way catalyst (manifold). Refer to 

EM-153, "Removal and Installation"

.

NO

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

EM-164, "Removal and Installa-

tion"

. Always replace O-ring and trip with new one.

The fuel does not drip from the fuel injector.

ECM-276

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

P0444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

P0444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

DTC Description

INFOID:0000000010702969

DTC DETECTION LOGIC

POSSIBLE CAUSE

• Harness or connectors (EVAP canister purge volume control solenoid valve circuit is open or shorted.)
• EVAP canister purge volume control solenoid valve

FAIL-SAFE

Not applicable

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure
before conducting the next test.
1.

Turn ignition switch OFF and wait at least 10 seconds.

2.

Turn ignition switch ON.

3.

Turn ignition switch OFF and wait at least 10 seconds.

TESTING CONDITION:
Before performing the following procedure, confirm battery voltage is more than 11 V 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

>> Proceed to 

ECM-276, "Diagnosis Procedure"

.

NO-1

>> To check malfunction symptom before repair: Refer to 

GI-41, "Intermittent Incident"

.

NO-2

>> Confirmation after repair: INSPECTION END

Diagnosis Procedure

INFOID:0000000010702970

1.

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE POWER SUPPLY

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?

YES

>> GO TO 3.

NO

>> GO TO 2.

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

P0444

PURG VOLUME CONT/V
(Evaporative emission system purge con-
trol valve circuit open)

An excessively low voltage signal is sent to ECM through the EVAP canis-
ter purge volume control solenoid valve.

+

Voltage

EVAP canister purge volume 

control solenoid valve

Connector

Terminal

F67

1

Ground

Battery voltage

 

 

 

 

 

 

 

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