Infiniti QX56 (JA60). Manual - part 390

 

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Infiniti QX56 (JA60). Manual - part 390

 

 

EC-212

< COMPONENT DIAGNOSIS >

[VK56DE]

P0420, P0430 THREE WAY CATALYST FUNCTION

OK or NG

OK

>> GO TO 10.

NG

>> GO TO 7.

7.

CHECK FUNCTION OF IGNITION COIL-II

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.

OK or NG

OK

>> GO TO 8.

NG

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

EC-407, "Diagnosis Procedure"

.

8.

CHECK SPARK PLUG

Check the initial spark plug for fouling, etc.
OK or NG

OK

>> Replace malfunctioning spark plug(s) with standard type

one(s). For spark plug type, refer to 

EM-16, "Removal

and Installation"

.

NG

>> 1. Repair or clean spark plug.

2. 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.

OK or NG

OK

>> INSPECTION END

NG

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

EM-

16, "Removal and Installation"

.

10.

CHECK FUEL INJECTOR

1. Turn ignition switch OFF.

2. Remove fuel injector assembly.

Refer to 

EM-40, "Removal and Installation"

.

Keep fuel hose and all fuel injectors connected to fuel injector gallery.

3. Disconnect all ignition coil harness connectors.

4. Reconnect all fuel injector harness connectors disconnected.

5. Turn ignition switch ON.

Make sure fuel does not drip from fuel injector.

OK or NG

OK (Does not drip.)>>GO TO 11.

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

11.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-35, "How to Check Terminal"

 and 

GI-38, "Intermittent Incident"

.

Trouble is fixed.>>INSPECTION END

Trouble is not fixed.>>Replace three way catalyst assembly.

Spark should be generated.

SEF156I

Spark should be generated.

P0441 EVAP CONTROL SYSTEM

EC-213

< COMPONENT DIAGNOSIS >

[VK56DE]

C

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EC

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P0441 EVAP CONTROL SYSTEM

System Description

INFOID:0000000005149233

NOTE:

If DTC P0441 is displayed with other DTC such as P2122, P2123, P2127, P2128 or P2138, first perform

trouble diagnosis for other DTC.

In this evaporative emission (EVAP) control system, purge flow occurs during non-closed throttle conditions.

Purge volume is related to air intake volume. Under normal purge conditions (non-closed throttle), the EVAP

canister purge volume control solenoid valve is open to admit purge flow. Purge flow exposes the EVAP con-

trol system pressure sensor to intake manifold vacuum.

On Board Diagnosis Logic

INFOID:0000000005149234

Under normal conditions (non-closed throttle), sensor output voltage indicates if pressure drop and purge flow

are adequate. If not, a malfunction is determined.

DTC Confirmation Procedure

INFOID:0000000005149235

CAUTION:

Always drive vehicle at a safe speed.

NOTE:

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure

before conducting the next step.
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.

PBIB1026E

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0441 
0441

EVAP control system in-
correct purge flow

EVAP control system does not operate proper-
ly, EVAP control system has a leak between in-
take manifold and EVAP control system 
pressure sensor.

• EVAP canister purge volume control so-

lenoid valve stuck closed

• EVAP control system pressure sensor 

and the circuit

• Loose, disconnected or improper con-

nection of rubber tube

• Blocked rubber tube
• Cracked EVAP canister
• EVAP canister purge volume control so-

lenoid valve circuit

• Accelerator pedal position sensor
• Blocked purge port
• EVAP canister vent control valve

EC-214

< COMPONENT DIAGNOSIS >

[VK56DE]

P0441 EVAP CONTROL SYSTEM

TESTING CONDITION:

Always perform test at a temperature of 5

°C (41°F) or more.

 WITH CONSULT-III

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 70 seconds.

4. Select “PURG FLOW P0441” of “EVAPORATIVE SYSTEM” in “DTC WORK SUPPORT” mode with CON-

SULT-III.

5. Touch “START”.

If “COMPLETED” is displayed, go to step 7.

6. When the following conditions are met, “TESTING” will be displayed on the CONSULT-III screen. Maintain

the conditions continuously until “TESTING” changes to “COMPLETED”. (It will take at least 35 seconds.)

If “TESTING” is not changed for a long time, retry from step 2.

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

EC-

214, "Diagnosis Procedure"

.

Overall Function Check

INFOID:0000000005149236

Use this procedure to check the overall monitoring function of the EVAP control system purge flow monitoring.

During this check, a 1st trip DTC might not be confirmed.

 WITH GST

1. Lift up drive wheels.

2. Start engine (VDC switch OFF) and warm it up to normal operating temperature.

3. Turn ignition switch OFF, wait at least 10 seconds.

4. Start engine and wait at least 70 seconds.

5. Set voltmeter probes to ECM terminals 32 (EVAP control system

pressure sensor signal) and ground.

6. Check EVAP control system pressure sensor value at idle speed

and note it.

7. Establish and maintain the following conditions for at least 1

minute.

8. Verify that EVAP control system pressure sensor value stays 0.1 V less than the value at idle speed (mea-

sured at step 6) for at least 1 second.

9. If NG, go to 

EC-214, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000005149237

1.

CHECK EVAP CANISTER

1. Turn ignition switch OFF.

2. Check EVAP canister for cracks.
OK or NG

OK (With CONSULT-III)>>GO TO 2.

Selector lever

Suitable position

VHCL SPEED SE

32 - 120 km/h (20 - 75 MPH)

ENG SPEED

500 - 3,000 rpm

B/FUEL SCHDL

1.0 - 12.0 msec

COOLAN TEMP/S

More than 0

°C (32°F)

Air conditioner switch

ON

Headlamp switch

ON

Rear window defogger switch

ON

Engine speed

Approx. 3,000 rpm

Gear position

Any position other than P, N or R

PBIB1109E

P0441 EVAP CONTROL SYSTEM

EC-215

< COMPONENT DIAGNOSIS >

[VK56DE]

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OK (Without CONSULT-III)>>GO TO 3.

NG

>> Replace EVAP canister.

2.

CHECK PURGE FLOW

 With CONSULT-III

1. Disconnect vacuum hose connected to EVAP canister purge volume control solenoid valve at EVAP ser-

vice port and install vacuum gauge. For the location of EVAP service port, refer to 

EC-37, "Description"

.

2. Start engine and let it idle.

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

4. Rev engine up to 2,000 rpm.

5. Touch “Qd” and “Qu” on CONSULT-III screen to adjust “PURG VOL CONT/V” opening and check vacuum

existence.

OK or NG

OK

>> GO TO 7.

NG

>> GO TO 4.

3.

CHECK PURGE FLOW

 Without CONSULT-III

1. Start engine and warm it up to normal operating temperature.

2. Stop engine.

3. Disconnect vacuum hose connected to EVAP canister purge volume control solenoid valve at EVAP ser-

vice port and install vacuum gauge. For the location of EVAP service port, refer to 

EC-37, "Description"

.

4. Start engine and let it idle.

Do not depress accelerator pedal even slightly.

5. Check vacuum gauge indication before 60 seconds passed after starting engine.

6. Revving engine up to 2,000 rpm after 100 seconds passed after starting engine.

OK or NG

OK

>> GO TO 7.

NG

>> GO TO 4.

4.

CHECK EVAP PURGE LINE

1. Turn ignition switch OFF.

2. Check EVAP purge line for improper connection or disconnection.

Refer to 

EC-37, "Description"

.

OK or NG

OK

>> GO TO 5.

NG

>> Repair it.

5.

CHECK EVAP PURGE HOSE AND PURGE PORT

PURG VOL CONT/V

Vacuum

100%

Should exist.

0%

Should not exist.

Vacuum should not exist.

Vacuum should exist.

 

 

 

 

 

 

 

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