Nissan Pathfinder. Manual - part 478

EC-218

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

P0130, P0150 A/F SENSOR 1

If “TESTING” is not displayed after 20 seconds, retry from step 2.

CAUTION:

Always drive vehicle at a safe speed.

Is “TESTING” displayed on CONSULT screen?

YES

>> GO TO 5.

NO

>> Check A/F sensor 1 function again. GO TO 3.

5.

PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION B-II

Release accelerator pedal fully.

NOTE:

Never apply brake when releasing the accelerator pedal.
Which does “TESTING” change to?

COMPLETED>>GO TO 6.

OUT OF CONDITION>>Retry DTC CONFIRMATION PROCEDURE. GO TO 4.

6.

PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION B-III

Touch “SELF-DIAG RESULT”.
Which is displayed on CONSULT screen?

OK

>> INSPECTION END

NG

>> Proceed to 

EC-219, "Diagnosis Procedure"

.

7.

PERFORM COMPONENT FUNCTION CHECK FOR MALFUNCTION B

Perform component function check. Refer to 

EC-218, "Component Function Check"

.

NOTE:

Use component function check to check the overall function of the A/F sensor 1 circuit. During this check, a

1st trip DTC might not be confirmed.
Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Proceed to 

EC-219, "Diagnosis Procedure"

.

Component Function Check

INFOID:0000000009178148

1.

PERFORM COMPONENT FUNCTION CHECK

With GST

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

2. Drive the vehicle at a speed of 80 km/h (50 MPH) for a few minutes in the suitable gear position.

3. Shift the selector lever to the D position, then release the accelerator pedal fully until the vehicle speed

decreases to 50 km/h (31 MPH).

CAUTION:

Always drive vehicle at a safe speed.

NOTE:

Never apply brake when releasing the accelerator pedal.

4. Repeat steps 2 and 3 for 5 times.

5. Stop the vehicle and turn ignition switch OFF.

6. Wait at least 10 seconds and restart engine.

7. Repeat steps 2 and 3 for 5 times.

8. Stop the vehicle.

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

YES

>> Proceed to 

EC-219, "Diagnosis Procedure"

.

NO

>> INSPECTION END

ENG SPEED

1,000 - 3,200 rpm

VHCL SPEED SE

More than 64 km/h (40 mph)

B/FUEL SCHDL

1.0 - 10.0 msec

Selector lever

D position

P0130, P0150 A/F SENSOR 1

EC-219

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

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Diagnosis Procedure

INFOID:0000000009178149

1.

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 3.

NO

>> GO TO 2.

2.

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.

Is the inspection result normal?

YES

>> Perform the trouble diagnosis for power supply circuit.

NO

>> Repair or replace error-detected parts.

3.

CHECK A/F SENSOR 1 INPUT SIGNAL CIRCUIT

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.

DTC

A/F sensor 1

Ground

Voltage

Bank

Connector

Terminal

P0130

1

F5

4

Ground

Battery voltage

P0150

2

F65

4

DTC

A/F sensor 1

IPDM E/R 

Continuity

Bank

Connector

Terminal

Connector

Terminal

P0130

1

F5

4

F19

52

Existed

P0150

2

F65

4

53

DTC

A/F sensor 1

ECM

Continuity

Bank

Connector

Terminal

Connector

Terminal

P0130

1

F5

1

F52

69

Existed

2

73

P0150

2

F65

1

77

2

81

DTC

A/F sensor 1

Ground

Continuity

Bank

Connector

Terminal

P0130

1

F5

1

Ground

Not existed

2

P0150

2

F65

1

2

EC-220

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

P0130, P0150 A/F SENSOR 1

5. Also check harness for short to power.
Is the inspection result normal?

YES

>> GO TO 4.

NO

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

4.

CHECK INTERMITTENT INCIDENT

Check intermittent incident. Refer to 

GI-49, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> Replace malfunctioning air fuel ratio (A/F) sensor 1. Refer to 

EM-31, "Removal and Installation

(bank 2)"

, 

EM-33, "Removal and Installation (bank 1)"

.

NO

>> Repair or replace error-detected parts.

DTC

ECM

Ground

Continuity

Connector

Terminal

P0130

F52

69

Ground

Not existed

73

P0150

77

81

P0131, P0151 A/F SENSOR 1

EC-221

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

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P0131, P0151 A/F SENSOR 1

DTC Logic

INFOID:0000000009178150

DTC DETECTION LOGIC

To judge the malfunction, the diagnosis checks that the A/F signal computed by ECM from the A/F sensor 1

signal is not inordinately low.

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-

ing 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 that battery voltage is more than 10.5 V at idle.

>> GO TO 2.

2.

CHECK A/F SENSOR 1 FUNCTION

With CONSULT

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

2. Select “A/F SEN1 (B1)” or “A/F SEN1 (B2)” in “DATA MONITOR” mode with CONSULT.

3. Check “A/F SEN1 (B1)” or “A/F SEN1 (B2)” indication.

With GST

Follow the procedure “With CONSULT” above.
Is the indication constantly approx. 0 V?

YES

>> Proceed to 

EC-222, "Diagnosis Procedure"

.

NO

>> GO TO 3.

3.

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

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

2. Turn ignition switch ON.

3. Turn ignition switch OFF, wait at least 10 seconds and then restart engine.

4. Drive and accelerate vehicle to more than 40 km/h (25 MPH) within 20 seconds after restarting engine.

CAUTION:

Always drive vehicle at a safe speed.

5. Maintain the following conditions for approximately 20 consecutive seconds.

NOTE:

• Keep the accelerator pedal as steady as possible during cruising.

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P0131

A/F SENSOR1 (B1)
(O2 sensor circuit low volt-
age bank 1 sensor 1)

• The A/F signal computed by ECM from the A/

F sensor 1 signal is constantly approx. 0 V.

• Harness or connectors

(The A/F sensor 1 circuit is open or 
shorted.)

• A/F sensor 1

P0151

A/F SENSOR1 (B2)
(O2 sensor circuit high volt-
age bank 2 sensor 1)

ENG SPEED

1,000 - 3,200 rpm

VHCL SPEED SE

More than 40 km/h (25 mph)

B/FUEL SCHDL

1.5 - 9.0 msec

Selector lever

Suitable position