Nissan Pathfinder: Dtc/circuit Diagnosis (P0011 Intake Valve Timing Control ... P0111 Iat Sensor)

• P0011 Intake Valve Timing Control
• P0014 Evt Control
• P0030 A/f Sensor 1 Heater
• P0078 Evt Control Solenoid Valve
• P0087 Frp Control System ➤
• P00d2 Ho2s2 Heater
• P00fe Evap Control System
• P0101 Maf Sensor
• P0107 Barometric Pressure Sensor
• P0111 Iat Sensor

P0011 Intake Valve Timing Control Nissan Pathfinder

DTC Description

DTC DETECTION LOGIC

DTC		CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
P0011	00	INT/V TIM CONT-B1 [Intake valve timing control performance (bank 1)]	A	Diagnosis condition	Ignition switch: ON Engine speed: 1,200 – 3,175 rpm Engine coolant temperature: 60 – 120°C (140 – 248°F) Battery voltage: 11 – 16 V
				Signal (terminal)	—
				Threshold	During the advanced control of intake valve timing control, the angle difference between actual angle and target angle is 13 degrees or more
				Diagnosis delay time	6 seconds
			B	Diagnosis condition	Ignition switch: ON Engine speed: 500 – 2,000 rpm [when Nissan Pathfinder vehicle speed is less than 4 km/h (2.5 MPH)] Engine speed: 1,200 – 2,000 rpm [when vehicle speed is 4 km/h (2.5 MPH) or more] Engine coolant temperature: 60 – 120°C (140 – 248°F) Battery voltage: 11 – 16 V
				Signal (terminal)	—
				Threshold	During the advanced control of intake valve timing control, the absolute difference between valve timing control reference position and base angle is 13 degrees or more
				Diagnosis delay time	3 seconds

POSSIBLE CAUSE

Malfunction A

• Electric intake valve timing (IVT) control actuator (bank 1)

• Harness and connectors (Electric IVT control actuator (bank 1) motor control circuit is open or shorted.)

• Foreign matter caught at the electric IVT control actuator (bank 1)

Malfunction B

• Timing chain installation

• Intake camshaft sprocket (bank 1) wear

FAIL-SAFE

Fail safe mode		Nissan Pathfinder Vehicle behavior
Device fix mode		Fixes electric intake valve timing control motor in the reference position. Fixes exhaust valve timing control solenoid valve in the reference position.

DTC Confirmation Procedure

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 that battery voltage is between 11 V and 16 V at idle.

>>

GO TO 2.

PERFORM DTC CONFIRMATION PROCEDURE-I

With CONSULT

1. Turn ignition switch ON.

2. On CONSULT screen, select “ENGINE”>>“Data Monitor”.

3. Start engine and warm it up to the normal operating temperature.

4. Maintain the following conditions for at least 10 consecutive seconds. Hold the accelerator pedal as steady as possible.

   ENG SPEED	1,200 – 2,000 rpm
   COOLAN TEMP/S	More than 60°C (140°F)
   Selector lever	P or N position

5. Let engine idle for 10 seconds.

6. Check 1st trip DTC.

With GST

Follow the procedure “With CONSULT” above.

Is DTC P0011 detected?

YES>>

Proceed to Diagnosis Procedure.

NO>>

GO TO 3.

PERFORM DTC CONFIRMATION PROCEDURE-II

With CONSULT

1. Maintain the following conditions for at least 20 consecutive seconds.

   ENG SPEED	1,200 – 3,175 rpm (A constant rotation is maintained.)
   COOLAN TEMP/S	More than 64°C (147°F)
   Selector lever	1st or 2nd position
   Driving location	Driving Nissan Pathfinder vehicle uphill (Increased engine load will help maintain the driving conditions required for this test.)

   CAUTION:

   Always drive at a safe speed.

2. Check 1st trip DTC.

WITH GST

Follow the procedure “With CONSULT” above.

Is DTC P0011 detected?

YES>>

Proceed to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

TYPE A

CHECK ELECTRIC IVT CONTROL ACTUATOR (BANK 1) MOTOR CONTROL CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect electric IVT control actuator (bank 1) harness connector and electric IVT control module harness connector.

3. Check the continuity between electric IVT control actuator (bank 1) harness connector and electric IVT control module harness connector.

   Electric IVT control actuator (bank 1)		Electric IVT control module		Continuity
   Connector	Terminal	Connector	Terminal
   F87	1	F99	117	Existed
   	2		114
   	3		119

4. Check harness for short to power and short to ground.

Is the inspection result normal?

YES>>

Replace electric IVT control actuator (bank 1). Refer to Exploded View.

NO>>

Repair or replace error-detected parts.

TYPE B

CHECK TIMING CHAIN INSTALLATION

Check service records for any recent repairs that may cause timing chain misaligned.

Are there any service records that may cause timing chain misaligned?

YES>>

Check timing chain installation. Refer to Removal and Installation.

NO>>

GO TO 2.

CHECK CAMSHAFT SPROCKET AND TIMING CHAIN

Check the following.

1. Visually check for chipping camshaft sprocket (bank 1) gear tooth.

2. timing chain tension and elongation.

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Repair or replace error-detected parts.

P0014 Evt Control Nissan Pathfinder R53

DTC Description

DTC DETECTION LOGIC

DTC		CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
P0014	00	EXH/V TIM CONT-B1 (“B” camshaft position - timing over-advanced or system performance bank 1)	Diagnosis condition	Ignition switch: ON Engine speed: 1,700 – 2,950 rpm Engine coolant temperature: 70 – 120°C (158 – 248°F) Battery voltage: 11 – 16 V
			Signal (terminal)	—
			Threshold	During the advanced control of exhaust valve timing control, the angle difference between actual angle and target angle is 13 degrees or more
			Diagnosis delay time	6 seconds or more

POSSIBLE CAUSE

• Crankshaft position sensor 1

• Exhaust camshaft position sensor

• Exhaust valve control solenoid valve

• Accumulation of debris to the signal pick-up portion of the camshaft

• Timing chain installation

• Foreign matter caught in the oil groove for exhaust valve timing control

FAIL-SAFE

Fail safe mode		Nissan Pathfinder Vehicle behavior
Device fix mode		Fixes electric intake valve timing control motor in the reference position. Fixes exhaust valve timing control solenoid valve in the reference position.

DTC Confirmation Procedure

CHECK DTC PRIORITY

If DTC P0014 is displayed with DTC P0078, first perform the confirmation procedure (trouble diagnosis) for DTC P0078.

Is DTC P0078 detected?

YES>>

Perform diagnosis for P0078. Refer to DTC Description.

NO>>

GO TO 2.

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 that battery voltage is between 10 V and 16 V at idle.

 

>>

GO TO 3.

PERFORM DTC CONFIRMATION PROCEDURE-I

With CONSULT

1. Turn ignition switch ON.

2. On CONSULT screen, select “ENGINE”>>“Data Monitor”.

3. Start engine and warm it up to the normal operating temperature.

4. Maintain the following conditions for at least 6 consecutive seconds. Hold the accelerator pedal as steady as possible.

   ENG SPEED	1,200 – 2,000 rpm (A constant rotation is maintained.)
   COOLAN TEMP/S	More than 60°C (140°F)
   Selector lever	P or N position

5. Let engine idle for 10 seconds.

6. Check 1st trip DTC.

With GST

Follow the procedure “With CONSULT” above.

Is DTC P0014 detected?

YES>>

Proceed to Diagnosis Procedure.

NO>>

GO TO 4.

PERFORM DTC CONFIRMATION PROCEDURE-II

With CONSULT

1. Maintain the following conditions for at least 20 consecutive seconds.

   ENG SPEED	1,700 – 2,950 rpm (A constant rotation is maintained.)
   COOLAN TEMP/S	More than 70°C (158°F)
   Selector lever	D position
   Driving location uphill	Driving Nissan Pathfinder vehicle uphill (Increased engine load will help maintain the driving conditions required for this test.)

   CAUTION:

   Always drive at a safe speed.

    

2. Check 1st trip DTC.

With GST

Follow the procedure “With CONSULT” above.

Is DTC P0014 detected?

YES>>

Proceed to Diagnosis Procedure

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK DTC PRIORITY

If DTC P0014 is displayed with DTC P0078, first perform the confirmation procedure (trouble diagnosis) for DTC P0078.

Is DTC P0078 detected?

YES>>

Perform diagnosis for P0078. Refer to DTC Description.

NO>>

GO TO 2.

CHECK OIL PRESSURE WARNING

1. Start engine.

2. Check oil pressure warning and confirm it is not displayed.

   

Is oil pressure warning displayed?

YES>>

Check the engine oil level. Refer to Inspection.

NO>>

GO TO 3.

CHECK EXHAUST VALVE TIMING CONTROL SOLENOID VALVE

Check the exhaust valve timing control solenoid valve. Refer to Component Inspection (Exhaust Valve Timing Control Solenoid Valve).

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Replace malfunctioning exhaust valve timing control solenoid valve. Refer to Exploded View.

CHECK CRANKSHAFT POSITION SENSOR 1

Check the crankshaft position sensor 1. Refer to Component Inspection.

Is the inspection result normal?

YES>>

GO TO 5.

NO>>

Replace crankshaft position sensor 1. Refer to Exploded View.

CHECK EXHAUST CAMSHAFT POSITION SENSOR

Check the exhaust camshaft position sensor. Refer to Component Inspection.

Is the inspection result normal?

YES>>

GO TO 6.

NO>>

Replace malfunctioning exhaust camshaft position sensor. Refer to Exploded View.

CHECK CAMSHAFT (EXH)

Check the following.

• Accumulation of debris to the signal plate of camshaft rear end

  

• Chipping signal plate of camshaft rear end

Is the inspection result normal?

YES>>

GO TO 7.

NO>>

Remove debris and clean the signal plate of camshaft rear end or replace camshaft. Refer to Removal and Installation.

CHECK TIMING CHAIN INSTALLATION

Check service records for any recent repairs that may cause timing chain misaligned.

Are there any service records that may cause timing chain misaligned?

YES>>

Check timing chain installation. Refer to Removal and Installation.

NO>>

GO TO 8.

CHECK LUBRICATION CIRCUIT

Refer to Inspection.

Is the inspection result normal?

YES>>

INSPECTION END.

NO>>

Clean lubrication line.

Component Inspection (Exhaust Valve Timing Control Solenoid Valve)

CHECK EXHAUST VALVE TIMING CONTROL SOLENOID VALVE-I

1. Turn ignition switch OFF.

2. Disconnect exhaust valve timing control solenoid valve harness connector.

3. Check resistance between exhaust valve timing control solenoid valve terminals as per the following.

   Exhaust valve timing control solenoid valve		Condition		Resistance
   Terminal
   1	2	Temperature [°C (°F)]	20 (68)	7.0 – 7.8 Ω
   1	Ground			∞Ω (Continuity should not exist)
   2

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Replace malfunctioning exhaust valve timing control solenoid valve. Refer to Exploded View.

CHECK EXHAUST VALVE TIMING CONTROL SOLENOID VALVE-II

1. Remove exhaust valve timing control solenoid valve. Refer to Exploded View.

2. Provide 12 V DC between exhaust valve timing control solenoid valve terminals 1 and 2, and then interrupt it. Check that the plunger moves as shown in the figure.

   

   CAUTION:

   Do not apply 12 V DC continuously for 5 seconds or more. Doing so may result in damage to the coil in exhaust valve timing control solenoid valve.

    

   NOTE:

   Always replace O-ring when exhaust valve timing control solenoid valve is removed.

    

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace malfunctioning exhaust valve timing control solenoid valve. Refer to Exploded View.

P0030 A/f Sensor 1 Heater Nissan Pathfinder 5th Gen

DTC Description

DTC DETECTION LOGIC

NOTE:

When DTC P0036 is detected with DTC P0030 again after the inspection procedure is performed during previous diagnosis and it is judged to be normal, replace the harness between the air fuel ratio (A/F) sensor 1 and the IPDM E/R.

DTC		CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
P0030	00	HO2S1 HTR B1 (HO2S heater control circuit bank 1 sensor 1)	Diagnosis condition	Engine running at idle
			Signal (terminal)	A/F sensor 1 heater (bank 1) signal
			Threshold	Deterioration in A/F sensor 1 heater performance. (Voltage signal transmitted from A/F sensor 1 heater to ECM is higher/lower than voltage in the normal range.)
			Diagnosis delay time	—

POSSIBLE CAUSE

• Harness or connectors [A/F sensor 1 heater (bank 1) circuit is open or shorted.]

• A/F sensor 1 heater (bank 1)

• Short circuit of harness between the air fuel ratio (A/F) sensor 1 and heated oxygen sensor 2.

FAIL-SAFE

Not applicable

DTC Confirmation Procedure

CHECK DTC PRIORITY

When DTC P0030 is detected with DTC P0036, first perform to check the harness for short circuit between the heated oxygen sensor 2 and the air fuel ratio (A/F) sensor 1.

Is applicable DTC detected?

YES>>

Perform to check the harness for short circuit between the heated oxygen sensor 2 and the air fuel ratio (A/F) sensor 1.

NO>>

GO TO 2.

PRECONDITIONING

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

1. Ignition switch OFF and wait at least 10 seconds.

2. Ignition switch ON.

3. Ignition switch OFF and wait at least 10 seconds.

TESTING CONDITION:

Before performing the following procedure, confirm that battery voltage is between 10.5 V and 16 V at idle.

>>

GO TO 3.

PERFORM DTC CONFIRMATION PROCEDURE

1. Start engine and let it idle for at least 10 seconds.

2. Check 1st trip DTC.

Is DTC P0030 detected?

YES>>

Proceed to Diagnosis Procedure.

NO-1>>

Proceed to Diagnosis Procedure.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK AIR FUEL RATIO (A/F) SENSOR 1 CONNECTOR FOR CONNECTION-1

Push the connector of air fuel ratio (A/F) sensor 1 and check it for connection.

Is the connector connected securely?

YES>>

GO TO 2.

NO>>

After connecting connector securely perform DTC confirmation procedure again. Refer to DTC Confirmation Procedure.

CHECK AIR FUEL RATIO (A/F) SENSOR 1 CONNECTOR INSIDE

Disconnect the air fuel ratio (A/F) sensor 1 connector and check inside the connector for water or foreign material.

Is inspection result normal?

YES>>

GO TO 3.

NO>>

Replace A/F sensor 1. Refer to Exploded View.

CHECK AIR FUEL RATIO (A/F) SENSOR 1 CONNECTOR FOR CONNECTION-2

Reconnect securely the connector of air fuel ratio (A/F) sensor 1 and check it for connection.

Is the connector connected securely?

YES>>

GO TO 4.

NO>>

Repair the harness connector and replace the air fuel ratio (A/F) sensor 1. Refer to Exploded View.

CHECK A/F SENSOR 1 POWER SUPPLY

1. Ignition switch OFF.

2. Disconnect A/F sensor 1 harness connector.

3. Ignition switch ON.

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

   +			−	Voltage
   A/F sensor 1
   Bank	Connector	Terminal
   1	F72	1	Ground	Battery voltage

Is the inspection result normal?

YES>>

GO TO 7.

NO>>

GO TO 5.

CHECK IPDM E/R POWER SUPPLY AND GROUND CIRCUIT

Check IPDM E/R power supply and ground circuit. Refer to Diagnosis Procedure.

Is the inspection result normal?

YES>>

GO TO 6.

NO>>

Repair or replace malfunctioning part.

CHECK A/F SENSOR 1 POWER SUPPLY CIRCUIT

1. Ignition switch OFF.

2. Disconnect IPDM E/R harness connector.

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

   IPDM E/R		A/F sensor 1		Continuity
   Connector	Terminal	Connector	Terminal
   F24	75	F72	1	Existed

4. Also check harness for short to ground.

Is the inspection result normal?

YES>>

Perform the trouble diagnosis for power supply circuit.

NO>>

Repair or replace error-detected parts.

CHECK A/F SENSOR 1 HEATER OUTPUT SIGNAL CIRCUIT

1. Ignition switch OFF.

2. Disconnect ECM harness connector.

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

   A/F sensor 1			ECM		Continuity
   Bank	Connector	Terminal	Connector	Terminal
   1	F72	2	F79	91	Existed

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

Is the inspection result normal?

YES>>

GO TO 8.

NO>>

Repair or replace error-detected parts.

CHECK A/F SENSOR 1 HEATER

Check A/F sensor 1 heater. Refer to Component Inspection (A/F Sensor 1 Heater).

Is the inspection result normal?

YES>>

Check intermittent incident. Refer to Intermittent Incident.

NO>>

Replace malfunctioning A/F sensor 1. Refer to Exploded View.

Component Inspection (A/F Sensor 1 Heater)

CHECK A/F SENSOR 1

1. Ignition switch OFF.

2. Disconnect A/F sensor 1 harness connector.

3. Check resistance between A/F sensor 1 terminals as follows.

   A/F sensor 1		Condition		Resistance
   Terminal
   1	2	Temperature	25°C (77°F)	1.80 – 2.44 Ω
   	3			∞Ω (Continuity should not exist)
   	4
   2	3
   	4
   3	4

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace malfunctioning A/F sensor 1. Refer to Exploded View.

P0078 Evt Control Solenoid Valve Nissan Pathfinder R53

DTC Description

DTC DETECTION LOGIC

DTC		CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
P0078	00	EX V/T ACT/CIRC-B1 (Exhaust valve control solenoid circuit bank 1)	Diagnosis condition	Engine running at idle
			Signal (terminal)	Exhaust valve timing control solenoid valve (bank 1) signal
			Threshold	An improper voltage is sent to the ECM through exhaust valve timing control solenoid valve
			Diagnosis delay time	—

POSSIBLE CAUSE

• Harness or connectors (Exhaust valve timing control solenoid valve circuit is open or shorted.)

• Exhaust valve timing control solenoid valve

FAIL-SAFE

Fail safe mode		Nissan Pathfinder Vehicle behavior
Device fix mode		Fixes electric intake valve timing control motor in the reference position. Fixes exhaust valve timing control solenoid valve in the reference position.

DTC Confirmation Procedure

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.

>>

GO TO 2.

PERFORM DTC CONFIRMATION PROCEDURE

1. Start engine and let it idle for 5 seconds.

2. Check 1st trip DTC.

Is DTC P0078 detected?

YES>>

Proceed to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK EXHAUST VALVE TIMING CONTROL SOLENOID VALVE POWER SUPPLY

1. Turn ignition switch OFF.

2. Disconnect exhaust valve timing control solenoid valve harness connector.

3. Turn ignition switch ON.

4. Check the voltage between exhaust valve timing control solenoid valve harness connector and ground.

   +			−	Voltage
   Exhaust valve timing control solenoid valve
   Bank	Connector	Terminal
   1	F77	1	Ground	Battery voltage

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

GO TO 2.

CHECK EXHAUST VALVE TIMING CONTROL SOLENOID VALVE POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect IPDM E/R harness connector.

3. Check the continuity between exhaust valve timing control solenoid valve harness connector and IPDM E/R harness connector.

   Exhaust valve timing control solenoid valve			IPDM E/R		Continuity
   Bank	Connector	Terminal	Connector	Terminal
   1	F77	1	F24	73	Existed

4. Also check harness for short to ground.

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Repair or replace error-detected parts.

CHECK EXHAUST VALVE TIMING CONTROL SOLENOID VALVE OUTPUT SIGNAL CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect ECM harness connector.

3. Check the continuity between exhaust valve timing control solenoid valve harness connector and ECM harness connector.

   Exhaust valve timing control solenoid valve			ECM		Continuity
   Bank	Connector	Terminal	Connector	Terminal
   1	F77	2	F79	157	Existed

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

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Repair or replace error-detected parts.

CHECK EXHAUST VALVE TIMING CONTROL SOLENOID VALVE

Check exhaust valve timing control solenoid valve control solenoid valve. Refer to Component Inspection (Exhaust Valve Timing Control Solenoid Valve).

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace malfunctioning exhaust valve timing control solenoid valve. Refer to Exploded View.

Component Inspection (Exhaust Valve Timing Control Solenoid Valve)

CHECK EXHAUST VALVE TIMING CONTROL SOLENOID VALVE-I

1. Turn ignition switch OFF.

2. Disconnect exhaust valve timing control solenoid valve harness connector.

3. Check resistance between exhaust valve timing control solenoid valve terminals as per the following.

   Exhaust valve timing control solenoid valve		Condition		Resistance
   Terminal
   1	2	Temperature [°C (°F)]	20 (68)	7.0 – 7.8 Ω
   1	Ground			∞Ω (Continuity should not exist)
   2

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Replace malfunctioning exhaust valve timing control solenoid valve. Refer to Exploded View.

CHECK EXHAUST VALVE TIMING CONTROL SOLENOID VALVE-II

1. Remove exhaust valve timing control solenoid valve. Refer to Exploded View.

2. Provide 12 V DC between exhaust valve timing control solenoid valve terminals 1 and 2, and then interrupt it. Check that the plunger moves as shown in the figure.

   

   CAUTION:

   Do not apply 12 V DC continuously for 5 seconds or more. Doing so may result in damage to the coil in exhaust valve timing control solenoid valve.

   NOTE:

   Always replace O-ring when exhaust valve timing control solenoid valve is removed.

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace malfunctioning exhaust valve timing control solenoid valve. Refer to Exploded View.

P0087 Frp Control System ➤ Nissan Pathfinder SUV

DTC Description

DTC DETECTION LOGIC

NOTE:

DTC P0087 may be displayed when running out of gas or air accumulation.

 

DTC		CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
P0087	00	LOW FUEL PRES (Fuel rail/system pressure - too low)	A	Diagnosis condition	Engine running at idle
				Signal (terminal)	Fuel rail pressure signal
				Threshold	Fuel rail pressure does not reach 4.0 MPa (40.8 kg/cm2, 580 psi) at engine cold start [water temperature −12°C (10.4°F) – 40°C (104°F)]. Fuel rail pressure remains at 7.5 MPa (76.5 kg/cm2, 1087.5 psi) or less for 1 second or more during engine idle condition after cold start [water temperature −12°C (10.4°F) – 40°C (104°F)]. The following condition continues for 5 seconds or more after engine start (regardless of water temperature): Target fuel pressure – Actual fuel pressure = 2.7 MPa (27.5 kg/cm2, 392 psi) or less.
				Diagnosis delay time	5 seconds or more

POSSIBLE CAUSE

• Fuel system

• Leakage in fuel line

• High pressure fuel pump

• Low pressure fuel pump

• Damage in lifter

• Out of gas

• Harness or connector

• Fuel Pressure sensor

• Fuel Injector stuck open

• Clogged in fuel line

• High Pressure fuel pump cam and lifter

FAIL-SAFE

Fail safe mode		Nissan Pathfinder Vehicle behavior
Traveling control mode	Accelerator angle variation control	ECM controls the accelerator pedal depression speed to make it slower than actual speed. This causes a drop in accelerating performance and encourages the driver to repair malfunction. NOTE: ECM does not control the accelerator pedal releasing speed.
Device fix mode		Fixes electric intake valve timing control motor in the reference position. Fixes exhaust valve timing control solenoid valve in the reference position.
Combustion control mode	Stratified charge combustion control at starting	No stratified charge combustion at starting (cold start).

DTC Confirmation Procedure

CHECK DTC PRIORITY

If the following DTCs are detected together with P0087, prioritize the service for each DTC in the following order.

Priority	DTC	Cause
1	P0090, P0091, P0092	High pressure fuel pump, Harness, Fuse, Relay
	P0190, P0191, P0192, P0193, P119C, P119D, P119E	Fuel pressure sensor, Harness
	P020x (x: Cyl No.), P0262, P0265, P0268, P0271, P0274, P0277	Injector, Harness
	P025A, P025B, P025C, P025D	Low pressure fuel pump
	P0461, P0462	Fuel gage, Harness
	P062B, P026D	ECM, Harness
2	P119A, P119B	Fuel pressure sensor
3	P1197	Fuel run out

NOTE:

Depending on the Nissan Pathfinder vehicle, there may be cases where the mentioned DTC codes are not detected.

 

Is applicable DTC detected?

YES>>

Perform the diagnosis of the applicable. Refer to DTC Index.

NO>>

GO TO 2.

CHECK FUEL LEAKAGE

1. Ignition switch ON.

2. Visually check the piping between low pressure fuel pump and fuel injectors for fuel leakage.

3. Start the engine.

4. Visually check the piping between low pressure fuel pump and fuel injectors for fuel leakage.

Is inspection result normal?

YES>>

GO TO 3.

NO>>

Repair or replace error-detected parts.

PRECONDITIONING

If DTC CONFIRMATION PROCEDURE has been previously conducted, always perform the following procedure before conducting the next test.

1. Ignition switch OFF and wait at least 10 seconds.

2. Ignition switch ON.

3. Ignition switch OFF and wait at least 10 seconds.

TESTING CONDITION:

• Before performing the following procedure, confirm that battery voltage is 11 V or more at idle.

• Before performing the following procedure, check that the fuel tank is 1/8 full of fuel.

 

>>

GO TO 4.

PERFORM DTC CONFIRMATION PROCEDURE-I

With CONSULT

1. Ignition switch ON.

2. On CONSULT screen, select “ENGINE”>>“Data Monitor”>>“COOLAN TEMP/S”.

3. Check the following condition;

   COOLAN TEMP/S

   −12 – 40°C (10.4 – 104°F)

With GST

Follow the procedure “With CONSULT” above.

Is the condition satisfied?

YES>>

GO TO 5.

NO>>

1. Satisfy the condition.

2. Retry from step 1.

PERFORM DTC CONFIRMATION PROCEDURE-II

1. Start the engine and let it idle for 10 seconds.

2. Check 1st trip DTC.

Is DTC P0087 detected?

YES>>

Proceed to Diagnosis Procedure.

NO>>

GO TO 6.

PERFORM DTC CONFIRMATION PROCEDURE-III

With CONSULT

1. On CONSULT screen, select “ENGINE”>>“Data Monitor”>>“COOLAN TEMP/S”.

2. Maintain the following condition for 10 seconds or more at idle.

   COOLAN TEMP/S

   70°C (158°F) or more

3. Check 1st trip DTC.

With GST

Follow the procedure “With CONSULT” above.

Is DTC P0087 detected?

YES>>

Proceed to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK DTC PRIORITY

If the following DTCs are detected together with P0087, prioritize the service for each DTC in the following order.

Priority	DTC	Cause
1	P0090, P0091, P0092	High pressure fuel pump, Harness, Fuse, Relay
	P0190, P0191, P0192, P0193, P119C, P119D, P119E	Fuel pressure sensor, Harness
	P020x (x: Cyl No.), P0262, P0265, P0268, P0271, P0274, P0277	Injector, Harness
	P025A, P025B, P025C, P025D	Low pressure fuel pump
	P0461, P0462	Fuel gage, Harness
	P062B, P026D	ECM, Harness
2	P119A, P119B	Fuel pressure sensor
3	P1197	Fuel run out

NOTE:

Depending on the Nissan Pathfinder vehicle, there may be cases where the mentioned DTC codes are not detected.

 

Is applicable DTC detected?

YES>>

Perform the diagnosis of the applicable. Refer to DTC Index.

NO>>

GO TO 2.

CHECK FUEL LEVEL

Check that the fuel level is enough.

Is there 1/8 or more fuel?

YES>>

GO TO 4.

NO>>

GO TO 3.

REFUEL THE Nissan Pathfinder Vehicle

1. Refuel to over 1/8 of full.

2. Start the engine and keep the engine speed at 3,000 rpm for 30 seconds.

   NOTE:

   For best results, warm up the engine until “COOLAN TEMP/S” on “DATA MONITOR” mode of “ENGINE” reaches at least 70°C (158°F).

    

3. Ignition switch OFF and wait at least 10 seconds.

4. Ignition switch ON.

5. Ignition switch OFF and wait at least 10 seconds.

6. Ignition switch ON.

7. Erase the DTC.

8. Start the engine and let it idle at least 60 seconds.

9. Perform DTC confirmation procedure again. Refer to DTC Description.

Is DTC P0087 detected?

YES>>

GO TO 4.

NO>>

INSPECTION END

AIR BLEED THE FUEL LINE

1. Start the engine, and let the engine run at idle at least for 10 minutes.

2. Perform DTC confirmation procedure of DTC P0087.

Is 1st trip DTC detected?

YES>>

GO TO 5.

NO>>

GO TO 18.

CHECK HIGH FUEL PRESSURE (FEED PRESSURE)

1. Perform fuel pressure release. Refer to Work Procedure.

2. Ignition switch ON and select “DATA MONITOR” mode of “ENGINE” using CONSULT.

3. Check the indication of “FUEL PRES SEN”.

   Monitor item	Indication
   FUEL PRES SEN	Approx. 0.450 Mpa or more

Check high pressure fuel pump. Refer to Component Inspection (High Pressure Fuel Pump).

Is inspection result normal?

YES>>

GO TO 6.

NO>>

GO TO 10.

CHECK HIGH PRESSURE FUEL PUMP

Check high pressure fuel pump. Refer to Component Inspection (High Pressure Fuel Pump).

Is inspection result normal?

YES>>

GO TO 7.

NO>>

Repair or replace the error-detected parts.

CHECK FUEL RAIL PRESSURE SENSOR

Check fuel rail pressure sensor. Refer to Component Inspection (Fuel Rail Pressure Sensor).

Is inspection result normal?

YES>>

GO TO 8.

NO>>

Repair or replace the error-detected parts.

CHECK HIGH PRESSURE FUEL LEAKAGE

1. Start the engine.

2. Visually check that the high pressure fuel pump, fuel rail, and fuel piping have no fuel leakage.

Is inspection result normal?

YES>>

GO TO 9.

NO>>

Replace the error-detected parts.

CHECK HIGH PRESSURE FUEL PUMP LIFTER

Check high pressure fuel pump lifter. Refer to Removal and Installation.

Does the lifter top surface have scratches and/or dents?

YES>>

Replace the error-detected parts.

NO>>

GO TO 16.

CHECK LOW FUEL PRESSURE

Check low fuel pressure. Refer to Work Procedure.

Is inspection result normal?

YES>>

GO TO 11.

NO>>

GO TO 16.

CHECK FUEL RAIL PRESSURE SENSOR

Check fuel rail pressure sensor. Refer to Component Inspection (Fuel Rail Pressure Sensor).

Is inspection result normal?

YES>>

GO TO 12.

NO>>

Repair or replace the error-detected parts.

CHECK HIGH PRESSURE FUEL LEAKAGE

1. Start the engine.

2. Visually check that the high pressure fuel pump, fuel rail, and fuel piping have no fuel leakage.

Is inspection result normal?

YES>>

GO TO 13.

NO>>

Replace the error-detected parts.

CHECK HIGH PRESSURE FUEL PUMP LIFTER

Check high pressure fuel pump lifter. Refer to Removal and Installation.

Does the lifter top surface have scratches and/or dents?

YES>>

Replace the error-detected parts.

NO>>

GO TO 14.

REPLACE HIGH PRESSURE FUEL PUMP

Replace the high pressure fuel pump. Refer to Removal and Installation.

 

>>

GO TO 15.

PERFORM DTC CONFIRMATION PROCEDURE

1. Erase DTC.

2. Perform DTC confirmation procedure. Refer to DTC Confirmation Procedure.

Is the DTC P0087 detected again?

YES>>

Replace the fuel rail. Refer to Removal and Installation.

NO>>

INSPECTION END

CHECK LOW PRESSURE FUEL PUMP

Check low pressure fuel pump. Refer to Component Function Check.

Is inspection result normal?

YES>>

GO TO 17.

NO>>

Repair or replace the error-detected parts.

DETECT MALFUNCTIONING PART

Check fuel hoses and fuel tubes for clogging.

Is inspection result normal?

YES>>

GO TO 18.

NO>>

Repair or replace the error-detected parts.

CHECK FPCM

Check FPCM. Refer to Component Inspection (Fuel Pump Control Module).

Is inspection result normal?

YES>>

GO TO 19.

NO>>

Repair or replace the error-detected parts.

CHECK LOW PRESSURE FUEL LINE FOR INTERNAL LEAKAGE

1. Start the engine.

2. Visually check that the low pressure fuel pump, fuel rail, and fuel piping have no fuel leakage.

Is inspection result normal?

YES>>

INSPECTION END

NO>>

Replace the error-detected parts.

Component Inspection (High Pressure Fuel Pump)

CHECK HIGH PRESSURE FUEL PUMP-I

1. Ignition switch OFF.

2. Disconnect high pressure fuel pump harness connector.

3. Check the resistance between high pressure fuel pump terminals.

   High pressure fuel pump		Condition		Resistance
   +	−
   Terminal
   1	2	Temperature °C (°F)	20 (68)	0.45 – 0.55 Ω

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Replace high pressure fuel pump. Refer to Removal and Installation.

CHECK HIGH PRESSURE FUEL PUMP-II

With CONSULT

1. Reconnect high pressure fuel pump harness connector.

2. Start engine.

3. On CONSULT screen, select “ENGINE”>>“Data Monitor”.

4. Check that the “FUEL PRES SEN V” indication.

   Monitor Item	Condition	Values/Status
   FUEL PRES SEN V	Engine speed: Idle	1.120 – 1.310 V
   	Engine speed: Revving engine from idle to 4,000 rpm quickly	1.120 – 2.900 V

Without CONSULT

1. Reconnect high pressure fuel pump harness connector.

2. Start engine.

3. Check fuel rail pressure sensor signal voltage.

ECM			Condition	Voltage
Connector	+	−
	Terminal
F78	47	85	Engine speed: Idle	1.12 – 1.31 V
			Engine speed: Revving engine from idle to 4,000 rpm quickly	1.12 – 2.90 V

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace high pressure fuel pump. Refer to Removal and Installation.

P00d2 Ho2s2 Heater Nissan Pathfinder Fifth generation

DTC Description

DTC DETECTION LOGIC

DTC		CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
P00D2	00	Heated O2 sensor heater B1 sensor 2 (HO2S heater controlcircuit range/performance bank 1 sensor 2)	Diagnosis condition	—
			Signal (terminal)	Heated oxygen sensor 2 heater signal
			Threshold	Deterioration in heated oxygen sensor 2 heater (bank 1) performance. (Voltage signal transmitted from heated oxygen sensor 2 heater (bank 1) to ECM is higher /lower than voltage in the normal range.)
			Diagnosis delay time	—

POSSIBLE CAUSE

• Harness or connectors

  [The heated oxygen sensor 2 heater (bank 1) circuit is open or shorted.]

• Heated oxygen sensor 2 heater (bank 1)

FAIL-SAFE

Not applicable

DTC Confirmation Procedure

PRECONDITIONING

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 11 V or more at idle.

>>

GO TO 2.

PERFORM DTC CONFIRMATION PROCEDURE

1. Start engine and warm it up to the 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 1 minute under no load.

6. Let engine idle for 1 minute.

7. Check 1st trip DTC.

Is 1st trip DTC detected?

YES>>

Proceed to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK HEATED OXYGEN SENSOR 2 (HO2S2) POWER SUPPLY CIRCUIT

1. Disconnect heated oxygen sensor 2 (HO2S2) harness connector.

2. Turn ignition switch ON.

3. Check the voltage between HO2S2 harness connector and ground.

   DTC	HO2S2			Ground	Voltage
   	Bank	Connector	Terminal
   P00D2	1	F71	1	Ground	Battery voltage

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

GO TO 2.

DETECT MALFUNCTIONING PART

Check the following.

• 15A fuse (No. 82)

• Harness for open or short between heated oxygen sensor 2 and fuse

• Loose or poor connection for each connector and harness

>>

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

CHECK HO2S2 OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1. Turn ignition switch OFF.

2. Disconnect ECM harness connector.

3. Check the continuity between HO2S2 harness connector and ECM harness connector.

   DTC	HO2S2			ECM		Continuity
   	Bank	Connector	Terminal	Connector	Terminal
   P00D2	1	F71	2	F78	6	Existed

4. Also check harness for short to ground and 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.

CHECK HO2S2 HEATER

Refer to Component Inspection.

Is the inspection result normal?

YES>>

GO TO 6.

NO>>

GO TO 5.

REPLACE HEATED OXYGEN SENSOR 2

Replace malfunctioning heated oxygen sensor 2. Refer to Removal and Installation.

CAUTION:

• Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a hard surface such as a concrete floor; use a new one.

• Before installing new oxygen sensor, clean exhaust system threads using Oxygen Sensor Thread Cleaner [commercial service tool (NI-43897-18 or NI-43897-12)] and approved anti-seize lubricant (commercial service tool).

>>

INSPECTION END

CHECK INTERMITTENT INCIDENT

Refer to Intermittent Incident.

>>

INSPECTION END

Component Inspection

HEATED OXYGEN SENSOR 2 HEATER

1. Check resistance between HO2S2 terminals as follows.

   Terminal No.	Resistance
   1 and 2	5.4 – 7.3 Ω at 25°C (77°F)
   2 and 3, 4	∞Ω (Continuity should not exist)
   3 and 4

2. If NG, replace heated oxygen sensor 2.

CAUTION:

• Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a hard surface such as a concrete floor; use a new one.

• Before installing new oxygen sensor, clean exhaust system threads using Oxygen Sensor Thread Cleaner tool NI-43897-18 or NI-43897-12 and approved anti-seize lubricant.

P00fe Evap Control System Nissan Pathfinder 2025

DTC Description

This diagnosis detects clogs in the EVAP line between fuel tank and EVAP canister purge volume control solenoid valve.

ECM controls EVAP control system as below. ECM monitors EVAP line pressure change to diagnose if there is no clogging between EVAP canister and fuel tank.

1. ECM closes EVAP canister vent control valve while the engine is running.

2. ECM controls EVAP canister purge volume control solenoid valve. (Fuel vapor in EVAP line is absorbed by intake manifold pressure)

3. ECM monitors EVAP line pressure change using EVAP control system pressure sensor. (When there is clogging in EVAP line, the path to the space of fuel tank is partially blocked. As a result, the pressure in EVAP line drops faster.)

DTC DETECTION LOGIC

DTC		CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
P00FE	00	EVAP system vapor line (EVAP system tank vapor line restricted/blocked)	Diagnosis condition	—
			Signal (terminal)	—
			Threshold	When EVAP canister vent control valve is closed while EVAP canister purge volume control solenoid valve is activated, the pressure of EVAP control system drops extraordinary.
			Diagnosis delay time	—

POSSIBLE CAUSE

• Fuel tank vent line (bent, clogs, etc.)

• EVAP canister

FAIL-SAFE

Not applicable

DTC CONFIRMATION PROCEDURE

PRECONDITIONING

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

>>

GO TO 2.

PERFORM DTC CONFIRMATION PROCEDURE

1. Drive the Nissan Pathfinder vehicle under the following conditions for at least 5 minutes in total.

   Engine coolant temperature	70°C (158°F) or more
   Nissan Pathfinder Vehicle speed	60 – 100 km/h (37 – 62 MPH)

   NOTE:

   Keep the accelerator pedal as possible during cruising.

2. Check DTC.

Is 1st trip DTC detected?

YES>>

Proceed to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident .

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK EVAP CONTROL SYSTEM FOR CLOGGING

With CONSULT

1. Turn ignition switch OFF.

2. Disconnect EVAP purge hose from EVAP canister purge volume control valve.

   

3. Disconnect fuel tank vent hose from EVAP canister.

4. Turn ignition switch ON (engine stopped).

5. On CONSULT screen, select “ENGINE” >> “Work support” >> “EVAP SYSTEM CLOSE”.

6. Apply positive pressure (not vacuum) to the hose end using Vacuum/Pressure Hand Pump according to CONSULT screen instructions.

7. Check that the applied pressure does not increase and that pressure is not held.

Is the inspection result normal?

YES>>

Check fuel tank vent line for clogs, vent and installation condition.

NO>>

Replace EVAP canister. Refer to Removal and Installation.

P0101 Maf Sensor Nissan Pathfinder 2022

DTC Description

DTC DETECTION LOGIC

DTC		CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
P0101	00	MAF SEN/CIRCUIT-B1 (Mass or volume air flow “A” circuit range/performance)	Diagnosis condition	—
			Signal (terminal)	Mass air flow sensor signal
			Threshold	A low frequency from the sensor is sent to ECM under light load driving condition A high frequency from the sensor is sent to ECM under heavy load driving condition
			Diagnosis delay time	—

POSSIBLE CAUSE

• Harness or connectors (The mass air flow sensor circuit is open or shorted.)

• Mass air flow sensor

• EVAP control system pressure sensor

• Intake air leaks

• Intake air temperature sensor

• Electric throttle control actuator

• PCV hose air leak

• Purge hose air leak

FAIL-SAFE

Fail safe mode		Nissan Pathfinder Vehicle behavior
Traveling control mode	Accelerator angle variation control	ECM controls the accelerator pedal depression speed to make it slower than actual speed. This causes a drop in accelerating performance and encourages the driver to repair malfunction. NOTE: ECM does not control the accelerator pedal releasing speed.
	Engine output control	ECM reduces the engine output, according to the rise in engine speed. This reduces the Nissan Pathfinder vehicle speed to encourage the driver to repair malfunction. Driving at 70 km/h (44 MPH) or more is possible. NOTE: This value is a reference value converted from engine power to Nissan Pathfinder vehicle speed. Actual power limitation value differs due to the malfunctioning part and driving condition.
Device fix mode		Fixes electric intake valve timing control motor in the reference position. Fixes exhaust valve timing control solenoid valve in the reference position.
Combustion control mode	Stratified charge combustion control at starting	No stratified charge combustion at starting (cold start).
	Idle speed control	Stops feedback control of idle speed and controls with specified speed.
	Recovery speed control at decelerating	Stops recovery speed control by the fuel cut at decelerating and controls with specified speed.
	Idle neutral control	Stops idle neutral control.
	Ignition timing correction control	Partially controls ignition timing control.
	Retardation control	Controls ignition timing delay control in the intermediate water temperature range.

DTC Confirmation Procedure

CHECK DTC PRIORITY

If DTC P0101 is displayed with other DTC, first perform the confirmation procedure (trouble diagnosis) for other DTC.

Is applicable DTC detected?

YES>>

Perform diagnosis of applicable. Refer to DTC Index.

NO>>

GO TO 2.

PRECONDITIONING

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.

If engine will not start or stops soon, wait at least 10 seconds with engine stopped (Ignition switch ON) instead of running engine at idle speed.

 

>>

GO TO 3.

PERFORM DTC CONFIRMATION PROCEDURE

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

2. Drive the Nissan Pathfinder vehicle for at least 5 seconds under the following conditions:

   CAUTION:

   Always drive at a safe speed.

    

   Selector lever	Suitable position
   Nissan Pathfinder Vehicle speed	40 km/h (25 MPH) or more

   NOTE:

   • The gear must be fixed while driving the Nissan Pathfinder vehicle.

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

    

3. Check 1st trip DTC.

Is DTC P0101 detected?

YES>>

Proceed to Diagnosis Procedure.

NO>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK DTC PRIORITY

If DTC P0101 is displayed with other DTC, first perform the confirmation procedure (trouble diagnosis) for other DTC.

Is applicable DTC detected?

YES>>

Perform diagnosis of applicable. Refer to DTC Index.

NO>>

GO TO 2.

CHECK HARNESS CONNECTOR

1. Disconnect mass air flow sensor harness connector and ECM harness connector.

2. Connect mass air flow sensor harness connector and ECM harness connector.

3. Perform DTC confirmation procedure. Refer to DTC Confirmation Procedure.

Is DTC detected?

YES>>

GO TO 3.

NO>>

INSPECTION END

CHECK INTAKE SYSTEM

Check the following items to see the installation condition and the connection condition of the joint.

• Air duct

• Vacuum hoses

• Intake air passage between air duct and intake manifold

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Reconnect or replace error-detected parts.

CHECK MASS AIR FLOW SENSOR POWER SUPPLY

1. Disconnect mass air flow sensor harness connector.

2. Turn ignition switch ON.

3. Check the voltage between mass air flow sensor harness connector and ground.

   +		–	Voltage (Approx.)
   Mass air flow sensor
   Connector	Terminal
   E64	1	Ground	5 V

Is the inspection result normal?

YES>>

GO TO 6.

NO>>

GO TO 5.

CHECK MASS AIR FLOW SENSOR POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect ECM harness connector.

3. Check the continuity between mass air flow sensor harness connector and ECM harness connector.

   Mass air flow sensor		ECM		Continuity
   Connector	Terminal	Connector	Terminal
   E64	1	F78	41	Existed

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

Is the inspection result normal?

YES>>

Perform the trouble diagnosis for ECM power supply circuit. Refer to Diagnosis Procedure.

NO>>

Repair or replace error-detected parts.

CHECK MASS AIR FLOW SENSOR GROUND CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect ECM harness connector.

3. Check the continuity between mass air flow sensor harness connector and ECM harness connector.

   Mass air flow sensor		ECM		Continuity
   Connector	Terminal	Connector	Terminal
   E64	3	F78	30	Existed

4. Also check harness for short to power.

Is the inspection result normal?

YES>>

GO TO 7.

NO>>

Repair or replace error-detected parts.

CHECK ECM GROUND CIRCUIT

1. Check the continuity between ECM harness connector and ground.

   ECM		—	Continuity
   Connector	Terminal
   F78	3	Ground	Existed
   F79	87
   E32	199
   	201
   	204

2. Also check harness for short to power.

Is the inspection result normal?

YES>>

GO TO 8.

NO>>

Repair or replace error-detected parts.

CHECK MASS AIR FLOW SENSOR INPUT SIGNAL CIRCUIT

1. Check the continuity between mass air flow sensor harness connector and ECM harness connector.

   Mass air flow sensor		ECM		Continuity
   Connector	Terminal	Connector	Terminal
   E64	2	F78	33	Existed

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

Is the inspection result normal?

YES>>

GO TO 9.

NO>>

Repair or replace error-detected parts.

CHECK INTAKE AIR TEMPERATURE SENSOR

Check intake air temperature sensor. Refer to Component Inspection (Intake Air Temperature Sensor).

Is the inspection result normal?

YES>>

GO TO 10.

NO>>

Replace mass air flow sensor (with intake air temperature sensor). Refer to Exploded View.

CHECK PCV VALVE

Check the PCV valve. Refer to Inspection.

Is the inspection result normal?

YES>>

GO TO 11.

NO>>

Replace PCV valve.

PERFORM IDLE AIR VOLUME LEARNING

Perform the idle air volume learning. Refer to Work Procedure.

 

>>

GO TO 12.

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR

Refer to Component Inspection.

Is the inspection result normal?

YES>>

GO TO 13.

NO>>

Replace EVAP control system pressure sensor. Refer to Removal and Installation.

PERFORM EVAP LEAK CHECK

Perform EVAP leak check. Refer to Inspection.

 

>>

GO TO 14.

CHECK MASS AIR FLOW SENSOR

Check mass air flow sensor. Refer to Component Inspection (Mass Air Flow Sensor).

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace mass air flow sensor. Refer to Exploded View.

P0107 Barometric Pressure Sensor Nissan Pathfinder

DTC Description

DTC DETECTION LOGIC

DTC		CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
P0107	00	ABSL PRES SEN/CIRC (Barometric pressure sensor circuit low input)	Diagnosis condition	—
			Signal (terminal)	—
			Threshold	An excessively low voltage from the barometric pressure sensor (built-into ECM) is sent to ECM.
			Diagnosis delay time	—

POSSIBLE CAUSE

Barometric pressure sensor (built-into ECM)

FAIL-SAFE

Fail safe mode		Nissan Pathfinder Vehicle behavior
Traveling control mode	Accelerator angle variation control	ECM controls the accelerator pedal depression speed to make it slower than actual speed. This causes a drop in accelerating performance and encourages the driver to repair malfunction. NOTE: ECM does not control the accelerator pedal releasing speed.
	Engine output control	ECM reduces the engine output, according to the rise in engine speed. This reduces the Nissan Pathfinder vehicle speed to encourage the driver to repair malfunction. Driving at 70 km/h (44 MPH) or more is possible. NOTE: This value is a reference value converted from engine power to Nissan Pathfinder vehicle speed. Actual power limitation value differs due to the malfunctioning part and driving condition.
Device fix mode		Fixes electric intake valve timing control motor in the reference position. Fixes exhaust valve timing control solenoid valve in the reference position.

DTC CONFIRMATION PROCEDURE

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.

>>

GO TO 2.

PERFORM DTC CONFIRMATION PROCEDURE

1. Start engine and let it idle for 5 seconds.

2. Check 1st trip DTC.

Is 1st trip DTC detected?

YES>>

Proceed to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

DTC CONFIRMATION

1. Turn ignition switch ON.

2. Erase DTC.

3. Perform DTC confirmation procedure. Refer to DTC Description.

4. Check the DTC.

Is the DTC displayed again?

YES>>

Replace ECM. Refer to Removal and Installation.

NO>>

INSPECTION END

P0111 Iat Sensor Nissan Pathfinder

DTC Description

DTC DETECTION LOGIC

DTC		CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
P0111	00	IAT SENSOR 1 B1 (Intake air temperature sensor 1 circuit range/performance bank 1)	Diagnosis condition	Engine cold start
			Signal (terminal)	Intake air temperature sensor signal
			Threshold	The comparison result of signals transmitted to ECM from each temperature sensor (IAT sensor, ECT sensor, FTT sensor, and EOT sensor) shows that the voltage signal of the IAT sensor is higher/lower than that of other temperature sensors.
			Diagnosis delay time	—

POSSIBLE CAUSE

• Harness or connectors (High or low resistance in the IAT sensor circuit)

• Mass air flow sensor (IAT sensor)

FAIL-SAFE

Not applicable

DTC Confirmation Procedure

INSPECTION START

Is it necessary to erase permanent DTC?

YES>>

GO TO 3.

NO>>

GO TO 2.

PERFORM COMPONENT FUNCTION CHECK

NOTE:

Use the component function check to check the overall function of the IAT sensor circuit. During this check, a 1st trip DTC might not be confirmed.

1. Turn ignition switch OFF.

2. Disconnect mass air flow sensor harness connector.

3. Check resistance between mass air flow sensor terminals as follows.

   Mass air flow sensor		Condition		Resistance
   Terminal
   3	4	Temperature [°C (°F)]	25 (77)	1.80 – 2.20 kΩ

Is the inspection result normal?

YES-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

YES-2>>

Confirmation after repair: INSPECTION END

NO>>

Proceed to Diagnosis Procedure.

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, do not add fuel.

• Before performing the following procedure, check that fuel level is between 1/4 and 4/4.

• Before performing the following procedure, confirm that battery voltage is 11 V or more at idle.

>>

GO TO 4.

PERFORM DTC CONFIRMATION PROCEDURE

1. Move the Nissan Pathfinder vehicle to a cool place.

   NOTE:

   Cool the vehicle in an environment of ambient air temperature between −10°C (14°F) and 35°C (95°F).

2. Turn ignition switch OFF and leave the Nissan Pathfinder vehicle for 12 hours.

   CAUTION:

   Never turn ignition switch ON during this procedure.

   NOTE:

   The Nissan Pathfinder vehicle must be cooled with the hood open.

3. Start engine and let it idle for 5 minutes or more.

   CAUTION:

   Never turn ignition switch OFF during idling.

4. Check 1st trip DTC.

Is DTC P0111 detected?

YES>>

Proceed to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK INTAKE AIR TEMPERATURE SENSOR

Check intake air temperature sensor. Refer to Component Inspection.

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace mass air flow sensor (with intake air temperature sensor). Refer to Exploded View.

Component Inspection

CHECK INTAKE AIR TEMPERATURE SENSOR

With CONSULT

1. Turn ignition switch OFF.

2. Disconnect mass air flow (MAF) sensor (intake air temperature sensor is built-into) harness connector and reconnect it.

3. Turn ignition switch ON.

4. On CONSULT screen, select “ENGINE”>>“Data Monitor”>>“INT/A TEMP SEN”.

5. Check that the indicated value of “INT/A TEMP SEN” is almost the same as intake air temperature.

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace mass air flow sensor (with intake air temperature sensor). Refer to Exploded View.