Nissan Maxima. Manual - part 443

 

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Nissan Maxima. Manual - part 443

 

 

EC-256

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

P014C, P014D, P014E, P014F, P015A, P015B, P015C, P015D A/F SENSOR 1

TESTING CONDITION:

Before performing the following procedure, confirm that battery voltage is more than 11 V at idle.
Do you have CONSULT?

YES

>> GO TO 2.

NO

>> GO TO 6.

2.

PERFORM DTC CONFIRMATION PROCEDURE-1

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. Turn ignition switch OFF and wait at least 10 seconds.

5. Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1minute under no load.

6. Let engine idle for 1 minute.

7. Increase the engine speed up to about 3,600 rpm and keep it for 10 seconds.

8. Fully release accelerator pedal and then let engine idle for about 1 minute.

9. Check the items status of “DATA MONITOR” as follows.

NOTE:

If “PRSNT” changed to “ABSNT”, refer to 

EC-220, "Component Function Check"

.

Is “PRSNT” displayed on CONSULT screen?

YES

>> GO TO 4.

NO

>> GO TO 3.

3.

PERFORM DTC CONFIRMATION PROCEDURE-2

With CONSULT

Perform DTC confirmation procedure-1 again.
Is “PRSNT” displayed on CONSULT screen?

YES

>> GO TO 4.

NO

>> Refer to 

EC-220, "Component Function Check"

.

4.

PERFORM DTC CONFIRMATION PROCEDURE-2

With CONSULT

1. Wait for about 20 seconds at idle.

2. Check the items status of “DATA MONITOR” as follows.

NOTE:

If “CMPLT” changed to “INCMP”, refer to 

EC-220, "Component Function Check"

.

Is “CMPLT” displayed on CONSULT screen?

DTC

Data monitor item

Status

• P014C
• P014D
• P015A
• P015B

A/F SEN1 DIAG3 (B1)

PRSNT

• P014E
• P014F
• P015C
• P015D

A/F SEN1 DIAG3 (B2)

DTC

Data monitor item

Status

• P014C
• P014D
• P015A
• P015B

A/F SEN1 DIAG1 (B1)

CMPLT

A/F SEN1 DIAG2 (B1)

• P014E
• P014F
• P015C
• P015D

A/F SEN1 DIAG1 (B2)

A/F SEN1 DIAG2 (B2)

P014C, P014D, P014E, P014F, P015A, P015B, P015C, P015D A/F SENSOR 1

EC-257

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

YES

>> GO TO 5.

NO

>> Refer to 

EC-220, "Component Function Check"

.

5.

PERFORM SELF-DIAGNOSIS

With CONSULT

Check the “SELF-DIAG RESULT”.
Is any DTC detected?

YES

>> Proceed to 

EC-257, "Diagnosis Procedure"

.

NO

>> INSPECTION END

6.

CHECK AIR-FUEL RATIO SELF-LEARNING VALUE

With GST

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

2. Select Service $01 with GST.

3. Calculate the total value of “Short term fuel trim” and “Long term fuel trim” indications.
Is the total percentage within 

±15%?

YES

>> GO TO 8.

NO

>> GO TO 7.

7.

DETECT MALFUNCTIONING PART

Check the following.

• Intake air leaks

• Exhaust gas leaks

• Incorrect fuel pressure

• Lack of fuel

• Fuel injector

• Incorrect PCV hose connection

• PCV  valve

• Mass air flow sensor

>> Repair or replace malfunctioning part.

8.

PERFORM DTC CONFIRMATION PROCEDURE

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.

4. Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no load.

5. Let engine idle for 1 minute.

6. Increase the engine speed up to about 3,600 rpm and keep it for 10 seconds.

7. Fully release accelerator pedal and then let engine idle for about 1 minute.

8. Check 1st trip DTC.
Is 1st trip DTC detected?

YES

>> Proceed to 

EC-257, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010094956

1.

RETIGHTEN A/F SENSOR 1

Loosen and retighten the A/F sensor 1. Refer to 

EM-31, "Removal and Installation (LH)"

 (LH) or 

EM-33,

"Removal and Installation (RH)"

 (RH).

>> GO TO 2.

2.

CHECK EXHAUST GAS LEAKAGE

1. Start engine and run it at idle.

EC-258

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

P014C, P014D, P014E, P014F, P015A, P015B, P015C, P015D A/F SENSOR 1

2. Listen for an exhaust gas leakage before three way catalyst (manifold).

Is exhaust gas leakage detected?

YES

>> Repair or replace.

NO

>> GO TO 3.

3.

CHECK FOR INTAKE AIR LEAK

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

YES

>> Repair or replace.

NO

>> GO TO 4.

4.

CLEAR THE MIXTURE RATIO SELF-LEARNING VALUE

1. Clear the mixture ratio self-learning value. Refer to 

EC-24, "MIXTURE RATIO SELF-LEARNING VALUE

CLEAR : Special Repair Requirement"

.

2. Run engine for at least 10 minutes at idle speed.
Is the 1st trip DTC P0171, P0172, P0174 or P0175 detected? Is it difficult to start engine?

YES

>> Perform trouble diagnosis for DTC P0171, P0174 or P0172, P0175. Refer to 

EC-261, "DTC Logic"

or 

EC-265, "DTC Logic"

.

NO

>> GO TO 5.

5.

CHECK AIR FUEL RATIO (A/F) SENSOR 1 POWER SUPPLY

1. Disconnect A/F sensor 1 harness connector.

2. Turn ignition switch ON.

3. Check the voltage between A/F sensor 1 harness connector and

ground.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> GO TO 6.

6.

CHECK AIR FUEL RATIO (A/F) SENSOR 1 POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect IPDM E/R harness connector.

3. Check the continuity between A/F sensor 1 harness connector and IPDM E/R harness connector.

PBIB1216E

DTC

A/F sensor 1

Ground

Voltage

Bank

Connector

Terminal

• P014C
• P014D
• P015A
• P015B

1

F12

4

Ground

Battery voltage

• P014E
• P014F
• P015C
• P015D

2

F61

4

PBIB3308E

P014C, P014D, P014E, P014F, P015A, P015B, P015C, P015D A/F SENSOR 1

EC-259

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

Is the inspection result normal?

YES

>> Perform the trouble diagnosis for power supply circuit.

NO

>> Repair or replace error-detected parts.

7.

CHECK A/F SENSOR 1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1. Turn ignition switch OFF.

2. Disconnect ECM harness connector.

3. Check the continuity between A/F sensor 1 harness connector and ECM harness connector.

4. Check the continuity between A/F sensor 1 harness connector and ground, or ECM harness connector

and ground.

5. Also check harness for short to power.

DTC

A/F sensor 1

IPDM E/R

Continuity

Bank

Connector

Terminal

Connector

Terminal

• P014C
• P014D
• P015A
• P015B

1

F12

4

F10

57

Existed

• P014E
• P014F
• P015C
• P015D

2

F61

4

DTC

A/F sensor 1

ECM

Continuity

Bank

Connector

Terminal

Connector

Terminal

• P014C
• P014D
• P015A
• P015B

1

F12

1

F13

45

Existed

2

49

• P014E
• P014F
• P015C
• P015D

2

F61

1

53

2

57

DTC

A/F sensor 1

Ground

Continuity

Bank

Connector

Terminal

• P014C
• P014D
• P015A
• P015B

1

F12

1

Ground

Not existed

2

• P014E
• P014F
• P015C
• P015D

2

F61

1

2

DTC

ECM

Ground

Continuity

Bank

Connector

Terminal

• P014C
• P014D
• P015A
• P015B

1

F13

45

Ground

Not existed

49

• P014E
• P014F
• P015C
• P015D

2

53

57

 

 

 

 

 

 

 

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