Nissan Pathfinder: Dtc/circuit Diagnosis (P2118 Throttle Control Motor ... P34ac Electric Intake Valve Timing Control Actuator)

• P2118 Throttle Control Motor
• P2119 Electric Throttle Control Actuator
• P2122 App Sensor
• P2138 App Sensor
• P219a Air Fuel Ratio
• P2297 Air Fuel Ratio Sensor 1
• P25df Electric Intake Valve Timing Control Motor
• P2610 Ecm Internal Timer
• P2b96 Injection Pulse
• P34ac Electric Intake Valve Timing Control Actuator

P2118 Throttle Control Motor Nissan Pathfinder 2022

DTC Description

DTC DETECTION LOGIC

DTC		CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
P2118	00	ETC MOT-B1 (Throttle control motor circuit short)	Diagnosis condition	Engine running at idle
			Signal (terminal)	Throttle control motor signal
			Threshold	ECM detects short in both circuits between ECM and throttle control motor
			Diagnosis delay time	—

POSSIBLE CAUSE

• Harness or connectors (Throttle control motor circuit is shorted.)

• Electric throttle control actuator

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.
Electric throttle control cancel mode		ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 degrees) by the return spring.

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. Turn ignition switch ON and wait at least 2 seconds.

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

3. Check DTC.

Is DTC P2118 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 THROTTLE CONTROL MOTOR OUTPUT SIGNAL CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect electric throttle control actuator harness connector.

3. Disconnect ECM harness connector.

4. Check the continuity between electric throttle control actuator harness connector and ECM harness connector.

   Electric throttle control actuator		ECM		Continuity
   Connector	Terminal	Connector	Terminal
   F50	2	F79	148	Existed
   			147	Not existed
   	1		148	Not existed
   			147	Existed

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

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Repair or replace error-detected parts.

CHECK THROTTLE CONTROL MOTOR

Check the throttle control motor. Refer to Component Inspection.

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace electric throttle control actuator. Refer to Exploded View.

Component Inspection

CHECK THROTTLE CONTROL MOTOR

1. Turn ignition switch OFF.

2. Disconnect electric throttle control actuator harness connector.

3. Check the resistance between electric throttle control actuator terminals as per the following.

   Electric throttle control actuator		Condition		Resistance
   Terminal
   1	2	Temperature [°C (°F)]	25 (77)	1 – 15 Ω

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace electric throttle control actuator. Refer to Exploded View.

P2119 Electric Throttle Control Actuator Nissan Pathfinder R53

DTC Description

DTC DETECTION LOGIC

DTC		CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
P2119	00	ETC ACTR-B1 (Electric throttle control actuator)	A	Diagnosis condition	—
				Signal (terminal)	—
				Threshold	Electric throttle control actuator does not function properly due to the return spring malfunction
				Diagnosis delay time	—
			B	Diagnosis condition	—
				Signal (terminal)	—
				Threshold	Throttle valve opening angle in fail-safe mode is not in specified range
				Diagnosis delay time	—
			C	Diagnosis condition	—
				Signal (terminal)	—
				Threshold	ECM detect the throttle valve is stuck open
				Diagnosis delay time	—

POSSIBLE CAUSE

Electric throttle control actuator

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.
Electric throttle control cancel mode		ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 degrees) by the return spring.

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 FOR MALFUNCTION A AND B

1. Turn ignition switch ON and wait at least 1 second.

2. Set selector lever to D position and wait at least 3 seconds.

3. Set selector lever to P position.

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

5. Turn ignition switch ON and wait at least 1 second.

6. Set selector lever to D position and wait at least 3 seconds.

7. Set selector lever to P position.

8. Turn ignition switch OFF, wait at least 10 seconds and then turn ON.

9. Check DTC.

Is DTC P2119 detected?

YES>>

Proceed to Diagnosis Procedure.

NO>>

GO TO 3.

PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION C

1. Turn ignition switch ON and wait at least 1 second.

2. Set selector lever to D position and wait at least 3 seconds.

3. Set selector lever to P position.

4. Start engine and let it idle for 3 seconds.

5. Check DTC.

Is DTC P2119 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 ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY

1. Remove air duct hose and resonator assembly. Refer to Exploded View.

2. Check if foreign matter is caught between the throttle valve and the housing.

   

Is the inspection result normal?

YES>>

Replace electric throttle control actuator. Refer to Exploded View.

NO>>

Remove the foreign matter and clean the electric throttle control actuator inside, then perform throttle valve closed position learning. Refer to Description.

P2122 App Sensor Nissan Pathfinder

DTC Description

DTC DETECTION LOGIC

DTC		CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
P2122	00	APP SEN 1/CIRC (Throttle/Pedal position sensor/switch “D” circuit low)	Diagnosis condition	Engine running at idle
			Signal (terminal)	Accelerator pedal position sensor 1 signal
			Threshold	An excessively low voltage from the APP sensor 1 is sent to ECM
			Diagnosis delay time	—

POSSIBLE CAUSE

• Harness or connectors (APP sensor 1 circuit is open or shorted.)

• Accelerator pedal position sensor (APP sensor 1)

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 P2122 is displayed with DTC P0643, first perform the confirmation procedure (trouble diagnosis) for DTC P0643.

Is DTC P0643 detected?

YES>>

Perform diagnosis of applicable. 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 more than 10 V at idle.

>>

GO TO 3.

PERFORM DTC CONFIRMATION PROCEDURE

1. Start engine and let it idle for 1 second.

2. Check DTC.

Is DTC P2122 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 P2122 is displayed with DTC P0643, first perform the confirmation procedure (trouble diagnosis) for DTC P0643.

Is DTC P0643 detected?

YES>>

Perform diagnosis of applicable. Refer to DTC Description.

NO>>

GO TO 2.

CHECK APP SENSOR 1 POWER SUPPLY

1. Disconnect accelerator pedal position (APP) sensor harness connector.

2. Turn ignition switch ON.

3. Check the voltage between APP sensor harness connector and ground.

   +		−	Voltage (Approx.)
   APP sensor
   Connector	Terminal
   E31	4	Ground	5 V

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

GO TO 3.

CHECK APP SENSOR 1 POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect ECM harness connector.

3. Check the continuity between APP sensor harness connector and ECM harness connector.

   APP sensor		ECM		Continuity
   Connector	Terminal	Connector	Terminal
   E31	4	E32	198	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 APP SENSOR 1 GROUND CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect ECM harness connector.

3. Check the continuity between APP sensor harness connector and ECM harness connector.

   APP sensor		ECM		Continuity
   Connector	Terminal	Connector	Terminal
   E31	2	E32	203	Existed

4. Also check harness for short to power.

Is the inspection result normal?

YES>>

GO TO 5.

NO>>

Repair or replace error-detected parts.

CHECK APP SENSOR INPUT SIGNAL CIRCUIT

1. Check the continuity between APP sensor harness connector and ECM harness connector.

   APP sensor		ECM		Continuity
   Connector	Terminal	Connector	Terminal
   E31	3	E32	202	Existed

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

Is the inspection result normal?

YES>>

GO TO 6.

NO>>

Repair or replace error-detected parts.

CHECK APP SENSOR

Refer to Component Inspection (Accelerator Pedal Position Sensor).

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace accelerator pedal assembly. Refer to Removal and Installation.

Component Inspection (Accelerator Pedal Position Sensor)

CHECK ACCELERATOR PEDAL POSITION SENSOR

1. Turn ignition switch OFF.

2. Reconnect all harness connectors disconnected.

3. Turn ignition switch ON.

4. Check the voltage ECM harness connector terminals as per the following.

   ECM			Condition		Voltage
   Connector	+	–
   	Terminal
   E32	202 (APP sensor 1)	203	Accelerator pedal	Fully released	0.45 – 1.0 V
   				Fully depressed	4.4 – 4.8 V
   	195 (APP sensor 2)	196		Fully released	0.22 – 0.50 V
   				Fully depressed	2.1 – 2.5 V

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace accelerator pedal assembly. Refer to Removal and Installation.

P2138 App Sensor Nissan Pathfinder R53

DTC Description

DTC DETECTION LOGIC

DTC		CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
P2138	00	APP SENSOR (Throttle/Pedal position sensor/switch “D”/“E” voltage correlation)	Diagnosis condition	Engine running at idle
			Signal (terminal)	Accelerator pedal position sensor 1 signal Accelerator pedal position sensor 2 signal
			Threshold	Rationally incorrect voltage is sent to ECM compared with the signals from APP sensor 1 and APP sensor 2
			Diagnosis delay time	—

POSSIBLE CAUSE

• Harness or connectors

  • APP sensor 1 circuit is open or shorted.

  • APP sensor 2 circuit is open or shorted.

  • Sensor power supply 2 circuit is shorted.

• Accelerator pedal position sensor (APP sensor 1)

• Accelerator pedal position sensor (APP sensor 2)

• Each sensor, connected with sensor power supply 2 circuit

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 P2138 is displayed with DTC P0643, first perform the confirmation procedure (trouble diagnosis) for DTC P0643.

Is DTC P0643 detected?

YES>>

Perform diagnosis of applicable. 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 more than 10 V at idle.

>>

GO TO 3.

PERFORM DTC CONFIRMATION PROCEDURE

1. Start engine and let it idle for 1 second.

2. Check DTC.

Is DTC P2138 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 P2138 is displayed with DTC P0643, first perform the confirmation procedure (trouble diagnosis) for DTC P0643.

Is DTC P0643 detected?

YES>>

Perform diagnosis of applicable. Refer to DTC Description.

NO>>

GO TO 2.

CHECK APP SENSOR 1

Check APP sensor 1. Refer to Diagnosis Procedure.

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair or replace error-detected parts.

CHECK APP SENSOR 2

Check APP sensor 2. Refer to Diagnosis Procedure.

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Repair or replace error-detected parts.

CHECK SENSOR POWER SUPPLY 2 CIRCUIT

Refer to Diagnosis Procedure.

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.

P219a Air Fuel Ratio Nissan Pathfinder

DTC Description

DTC DETECTION LOGIC

DTC		CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
P219A	00	AIR FUEL RATIO IMBALANCE B1 (Air-fuel ratio imbalance bank 1)	Diagnosis condition	—
			Signal (terminal)	—
			Threshold	ECM detects a lean/rich air fuel ratio state in any cylinder for a specified length of time
			Diagnosis delay time	—

POSSIBLE CAUSE

• Fuel injector

• Exhaust gas leaks

• Incorrect fuel pressure

• Mass air flow sensor

• Intake air leaks

• Lack of fuel

• Incorrect PCV hose connection

• Improper spark plug

• Insufficient compression

• The fuel injector circuit is open or shorted

• ignition coil

• The ignition signal circuit is open or shorted

FAIL-SAFE

Not applicable

DTC Confirmation Procedure

CHECK DTC PRIORITY

If DTC P219A is displayed with other DTC, first perform the confirmation procedure (trouble diagnosis) for the other DTC.

Is applicable DTC detected?

YES>>

Perform diagnosis of applicable. Refer to DTC Index.

NO>>

GO TO 2.

PRECONDITIONING-I

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.

NOTE:

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

 

 

>>

GO TO 3.

PRECONDITIONING-II

1. Turn ignition switch ON.

2. Clear the mixture ratio self-learning value. Refer to Description.

Do you have CONSULT?

YES>>

GO TO 4.

NO>>

GO TO 7.

PERFORM DTC CONFIRMATION PROCEDURE-I

With CONSULT

1. Turn ignition switch ON.

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

3. Start engine.

4. Make sure that “COOLAN TEMP/S” indicates more than 66°C (151°F).

 

>>

GO TO 5.

PERFORM DTC CONFIRMATION PROCEDURE-II

With CONSULT

1. On CONSULT screen, select “ENGINE”>>“Data Monitor”>>“SYSTEM 1 DIAGNOSIS B B1”, “SYSTEM 1 DIAGNOSIS A B1”, “SYSTEM 1 DIAGNOSIS B B2” and “SYSTEM 1 DIAGNOSIS A B2”.

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

   CAUTION:

   • Always drive Nissan Pathfinder vehicle at a safe speed.

    

   ENG SPEED	950 – 1,800 rpm
   COOLAN TEMP/S	More than 80°C (176°F)
   B/FUEL SCHDL	5 – 8 msec
   Selector lever	D position
   SYSTEM 1 DIAGNOSIS B B1 SYSTEM 1 DIAGNOSIS B B2	PRSENT

   NOTE:

   • Drive the Nissan Pathfinder vehicle at approximately 88 km/h (55 MPH) allows easy diagnosis.

   • Keep the accelerator pedal as possible during cruising.

    

    

3. Check “SYSTEM 1 DIAGNOSIS A B1” or “SYSTEM 1 DIAGNOSIS A B2” indication.

Is “CMPLT” displayed?

YES>>

GO TO 6.

NO>>

GO TO 3.

PERFORM DTC CONFIRMATION PROCEDURE-III

Check 1st trip DTC.

Is DTC P219A 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

PERFORM DTC CONFIRMATION PROCEDURE-IV

Without CONSULT

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

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

   CAUTION:

   • Always drive Nissan Pathfinder vehicle at a safe speed.

    

   Engine speed	950 – 1,800 rpm
   Calculated load value	27 – 57 %
   Selector lever	D position

   NOTE:

   • Drive the Nissan Pathfinder vehicle at approximately 88 km/h (55 MPH) allows easy diagnosis.

   • Keep the accelerator pedal as possible during cruising.

    

3. Check 1st trip DTC.

Is DTC P219A 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

NOTE:

Do not replace A/F sensor when DTC P219A is detected.

A/F sensor malfunction is not related to DTC P219A.

 

 

CHECK DTC PRIORITY

If DTC P219A is displayed with other DTC, first perform the confirmation procedure (trouble diagnosis) for the other DTC.

Is applicable DTC detected?

YES>>

Perform diagnosis of applicable. Refer to DTC Index.

NO>>

GO TO 2.

CHECK FOR INTAKE AIR LEAK

1. Stop engine and check the following for connection.

   • Air duct

   • Vacuum hoses

   • PCV hose

   • Intake air passage between air duct to intake manifold

2. Start engine and let it idle.

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

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair or replace error-detected parts.

CHECK EXHAUST GAS LEAK

1. Stop engine and visually check exhaust tube, three way catalyst and muffler for dents connection.

2. Start engine and let it idle.

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

   

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Repair or replace error-detected parts.

CHECK FUEL PRESSURE

1. Release fuel pressure to zero. Refer to Work Procedure.

2. Check fuel pressure. Refer to Work Procedure.

Is the inspection result normal?

YES>>

GO TO 5.

NO>>

GO TO 9.

CHECK MASS AIR FLOW SENSOR

With CONSULT

Check “MASS AIR FLOW SENSOR (Hz)” in “Data Monitor” mode of “ENGINE”.

For specification, refer to Mass Air Flow Sensor.

With GST

Check mass air flow sensor signal in Service $01 using GST.

For specification, refer to Mass Air Flow Sensor.

Is the inspection result normal?

YES>>

GO TO 6.

NO>>

Check connectors for rusted terminals or loose connections in the mass air flow sensor circuit or grounds. Refer to Diagnosis Procedure.

CHECK FUNCTION OF FUEL INJECTOR

With CONSULT

1. Start engine.

2. Perform “POWER BALANCE” in “Active Test” mode of “ENGINE”.

3. Check that each circuit produces a momentary engine speed drop.

Without CONSULT

1. Let engine idle.

2. Listen to each fuel injector operating sound.

   

   Clicking noise should be heard.

Is the inspection result normal?

YES>>

GO TO 7.

NO>>

Perform trouble diagnosis for fuel injector, refer to Component Function Check.

CHECK FUNCTION OF IGNITION COIL-I

CAUTION:

Perform the following steps in a well-ventilated area with no combustibles.

 

1. Turn ignition switch OFF.

2. Pull out 20A fuse (No.85) from IPDM E/R to release fuel pressure. Refer to IPDM E/R Terminal Arrangement .

   NOTE:

   CONSULT must not be used to release fuel pressure. It develops again during the following steps, if released by using CONSULT.

    

3. Start the engine.

4. After an engine stall, crank the engine two or three times to release all the fuel pressure.

5. Turn ignition switch OFF.

6. Disconnect all the harness connectors of ignition coil to prevent electric discharge from occurring in ignition coil.

7. Remove ignition coil assembly and spark plug of cylinder. Refer to Removal and Installation.

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. Allow a 13 – 17mm (0.52 – 0.66 in) spacing between spark plug and grounded metal portion as shown in the figure to fix the ignition coil with a rope or an equivalent.

    

11. Crank the engine for approximately 3 seconds to see if sparking occurs between spark plug and the grounded metal portion.

    Spark should be generated.

    CAUTION:

    • The discharge voltage becomes 20 kV or higher. Therefore, always stay away from the spark plug and ignition coil at least 50 cm (19.7 in) during the inspection.

    • Leaving a space of more than 17mm (0.66 in) may damage the ignition coil.

     

    NOTE:

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

     

Is the inspection result normal?

YES>>

GO TO 8.

NO>>

GO TO 10.

CHECK COMPRESSION PRESSURE

Check compression pressure. Refer to On-Nissan Pathfinder Vehicle Service.

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Check pistons, piston rings, valves, valve seats and cylinder head gaskets.

DETECT MALFUNCTIONING PART

Check fuel hoses and fuel tubes for clogging.

Is the inspection result normal?

YES>>

Replace fuel filter and fuel pump assembly. Refer to Removal and Installation.

NO>>

Repair or replace error-detected parts.

CHECK FUNCTION OF IGNITION COIL-II

1. Turn ignition switch OFF.

2. Disconnect spark plug and connect a non-malfunctioning spark plug.

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

   Spark should be generated.

Is the inspection result normal?

YES>>

GO TO 11.

NO>>

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

CHECK SPARK PLUG

Check the initial spark plug for fouling, etc.

Is the inspection result normal?

YES>>

1. Repair or clean spark plug. Refer to Removal and Installation.

2. GO TO 12.

NO>>

Replace spark plug(s) with standard type one(s). For spark plug type, refer to Exploded View.

CHECK FUNCTION OF IGNITION COIL-III

1. Reconnect the initial spark plugs.

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

   Spark should be generated.

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace spark plug(s) with standard type one(s). For spark plug type, refer to Exploded View.

P2297 Air Fuel Ratio Sensor 1 Nissan Pathfinder 5th Gen

DTC Description

DTC DETECTION LOGIC

DTC		CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
P2297	00	A/F SENSOR1 (B1) (O2 Sensor Out of Range During Deceleration Bank 1 Sensor 1)	Diagnosis condition	Engine run and fuel shut off
			Signal	—
			Threshold	Air fuel ratio(A/F) sensor 1 bank1 is out of normal range
			Diagnosis delay time	—

POSSIBLE CAUSE

Air fuel ratio(A/F) sensor 1 bank1

FAIL-SAFE

Not applicable

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.

YES>>

GO TO 2.

PERFORM DTC CONFIRMATION PROCEDURE

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

2. Drive the Nissan Pathfinder vehicle a 80 km/h (50 MPH), with selecting suitable gear.

   NOTE:

   Always keep safe driving to the first priority.

3. Release accelerator pedal completely to decelerate the Nissan Pathfinder vehicle for more than 10 seconds.

   NOTE:

   Always keep safe driving to the first priority.

4. Check 1st trip DTC.

Is 1st trip DTC detected?

YES>>

Refer to DTC Diagnosis Procedure.

NO-1>>

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

NO-2>>

Confirmation after repair: INSPECTION END

DTC Diagnosis Procedure

CHECK GROUND CONNECTION

1. Turn ignition switch OFF.

2. Check ground connection E9. Refer to Circuit Inspection.

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Repair or replace ground connection.

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

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.

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

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

GO TO 3.

DETECT MALFUNCTIONING PART

Check the following.

• IPDM E/R harness connector F24

• 15 A fuse (No. 82)

• Harness for open or short between A/F sensor 1 and fuse

>>

Repair or replace harness or connectors.

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.

   A/F sensor 1		ECM		Continuity
   Connector	Terminal	Connector	Terminal
   F72	3	F79	102	Existed
   	4		101

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

   A/F sensor 1		Ground	Continuity
   Connector	Terminal
   F72	3	Ground	Not existed
   	4

   ECM		Ground	Continuity
   Connector	Terminal
   F79	102	Ground	Not existed
   	101

5. Also check harness for short to power.

Is the inspection result normal?

YES>>

GO TO 5.

NO>>

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

CHECK INTERMITTENT INCIDENT

Refer to Intermittent Incident.

Is the inspection result normal?

YES>>

GO TO 6.

NO>>

Repair or replace.

REPLACE AIR FUEL RATIO (A/F) SENSOR 1

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

CAUTION:

• Discard any A/F 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 A/F 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

P25df Electric Intake Valve Timing Control Motor Nissan Pathfinder R53

DTC Description

DTC DETECTION LOGIC

DTC		CONSULT screen terms (Trouble diagnosis content)	DTC detecting condition
P25DF	00	A camshaft posi control B1 (A camshaft position control bank 1)	Diagnosis condition		Engine running at idle
			Signal (terminal)		Electric intake valve timing control motor signal
			Threshold		Detects electric intake valve timing control motor signal malfunction.
			Diagnosis delay time		—

POSSIBLE CAUSE

• Harness or connectors (electric intake valve timing control motor circuit is open or shorted.)

• Electric intake valve timing control motor

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.
Combustion control mode	No stratified charge combustion at starting (cold start).

DTC CONFIRMATION PROCEDURE

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the turn ignition switch OFF and wait at least 10 seconds before conducting the next test.

>>

GO TO 2.

PERFORM DTC CONFIRMATION PROCEDURE

1. Start the engine and let it idle.

2. Check 1st trip DTC.

Is 1st trip DTC detected?

YES>>

Refer to DTC Diagnosis Procedure.

NO-1>>

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

NO-2>>

Confirmation after repair: INSPECTION END

DTC Diagnosis Procedure

CHECK ELECTRIC INTAKE VALVE TIMING CONTROL ACTUATOR (BANK 1) CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect electric intake valve timing control actuator (bank 1) harness connector and electric intake valve timing control module harness connector.

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

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

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

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Repair or replace error-detected parts.

CHECK INTERMITTENT INCIDENT

Check intermittent incident. Refer to Intermittent Incident.

Is the inspection result normal?

YES>>

Replace electric intake valve timing control actuator (bank 1). Refer to Exploded View.

NO>>

Repair or replace error-detected parts.

P2610 Ecm Internal Timer Nissan Pathfinder Fifth generation

DTC Description

This ECM contains a timer and measures time between an ignition switch OFF and the next ignition switch ON. This enables the judging of the state of engine cooling at an engine start.

DTC DETECTION LOGIC

DTC		CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
P2610	00	ECM/PCM INTERNAL ENG OFF TIMER (ECM/PCM internal engine off timer performance)	Diagnosis condition	Ignition switch ON
			Signal (terminal)	—
			Threshold	ECM internal engine off timer is malfunctioning The time calculated by ECM based on a descent allowance of engine coolant temperatures during ignition switch OFF is extremely shorter than the time counted by the Engine internal OFF timer
			Diagnosis delay time	—

POSSIBLE CAUSE

• ECM

• ECM power supply

FAIL-SAFE

Not applicable

DTC Confirmation Procedure

INSPECTION START

It is necessary to erase permanent DTC?

YES>>

GO TO 4.

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.

TESTING CONDITION:

Before performing the following procedure, confirm that battery voltage is 12 V or more under ignition switch OFF condition.

>>

GO TO 3.

PERFORM DTC CONFIRMATION PROCEDURE-I

1. Turn ignition switch ON and wait at least 190 seconds.

2. Check 1st trip DTC.

Is DTC P2610 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

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 12 V or more under ignition switch OFF condition.

• Before performing the following procedure, check that fuel level is between 2/8 and 7/8.

>>

GO TO 5.

PERFORM DTC CONFIRMATION PROCEDURE-I

1. Turn ignition switch ON and wait at least 190 seconds.

2. Check 1st trip DTC.

Is DTC P2610 detected?

YES>>

Proceed to Diagnosis Procedure.

NO>>

GO TO 6.

PERFORM DTC CONFIRMATION PROCEDURE-II

CAUTION:

To start this self-diagnosis, the conditions listed bellow are required to be satisfied. Perform the following steps to satisfy the conditions.

• Engine coolant temperature decrease by 55°C (131°F) or more during the time between an ignition switch OFF (after engine warm-up) and the second ignition switch ON.

• A fuel temperature at the second ignition switch ON is −5°C (23°F) or more and less than 35°C (95°F).

• The temperature difference between engine coolant and fuel is 5°C (41°F) or more.

NOTE:

This self-diagnosis is not performed if the distance traveled is extremely short.

1. Turn ignition switch ON.

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

3. Turn ignition switch OFF and soak the Nissan Pathfinder vehicle for at least 12 hours.

   CAUTION:

   • Never turn ON the ignition switch during soaking.

   • Never open the fuel filler cap and perform refueling during soaking.

4. Turn ignition switch ON and wait at least 190 seconds.

5. Check 1st trip DTC.

Is DTC P2610 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 ECM POWER SUPPLY AND GROUND CIRCUIT

Check ECM power supply and ground circuit. Refer to Diagnosis Procedure.

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Repair or replace error-detected parts.

CHECK SELF-DIAGNOSTIC RESULT

Check that DTCs related to the fuel system and the cooling system are not detected.

Is the inspection result normal?

YES>>

Check the DTC. Refer to DTC Index.

NO>>

GO TO 3.

PERFORM DTC CONFIRMATION PROCEDURE

1. Erase DTC.

2. Perform DTC Confirmation Procedure again. Refer to DTC Description.

Is the DTC P2610 displayed again?

YES>>

Replace ECM. Refer to Removal and Installation.

NO>>

INSPECTION END

P2b96 Injection Pulse Nissan Pathfinder

DTC Description

DTC DETECTION LOGIC

DTC		CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
P2B96	00	Injection pulse	Diagnosis condition	—
			Signal	—
			Threshold	ECM does not control fuel injection quantity properly when engine is running (except engine cold start).
			Diagnosis delay time	1 second

POSSIBLE CAUSE

ECM

FAIL-SAFE

Not applicable

Confirmation Procedure

PERFORM DTC CONFIRMATION PROCEDURE

Start engine and drive the Nissan Pathfinder vehicle as per the similar conditions to Freeze Frame Data for 5 seconds.

Hold the accelerator pedal as steady as possible.

CAUTION:

Always drive Nissan Pathfinder vehicle in safe manner according to traffic conditions and obey all traffic laws when driving.

• COOLANT TEMP

• ENGINE SPEED

• CAL/LD VALUE

Is DTC detected?

YES>>

Proceed to DTC Diagnosis Procedure.

NO-1>>

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

NO-2>>

Confirmation after repair: INSPECTION END

DTC Diagnosis Procedure

REPLACE ECM

1. Replace ECM. Refer to Removal and Installation.

2. Refer to Work Procedure.

>>

INSPECTION END

P34ac Electric Intake Valve Timing Control Actuator Nissan Pathfinder 2022

DTC Description

DTC DETECTION LOGIC

DTC		CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
P34AC	00	A camshaft posi actuator posi sens B1 (“A” camshaft position actuator position sensor circuit bank1)	Diagnosis condition	Ignition switch ON
			Signal (terminal)	Electric intake valve timing control motor 1 hall sensor signal
			Threshold	An excessively low voltage from the sensor is sent to the electric IVT control module An excessively high voltage from the sensor is sent to the electric IVT control module
			Diagnosis delay time	—

POSSIBLE CAUSE

• Harness or connectors [Electric intake valve timing (IVT) control actuator (bank 1) (motor 1 hall sensor) circuit is open or shorted.]

• Electric IVT control actuator (bank 1) (motor 1 hall sensor)

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.
Combustion control mode	Stratified charge combustion control at starting	No stratified charge combustion at starting (cold start).

DTC Confirmation Procedure

CHECK DTC PRIORITY

If DTC P34AC is displayed with DTC P34AD, first perform the confirmation procedure (trouble diagnosis) for DTC P34AD.

Is DTC P34AD detected?

YES>>

Perform diagnosis for P34AD. 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 more than 10 V when ignition switch is ON.

>>

GO TO 3.

PERFORM DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON.

2. Check 1st trip DTC.

Is DTC P34AC 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 P34AC is displayed with DTC P34AD, first perform the confirmation procedure (trouble diagnosis) for DTC P34AD.

Is DTC P34AD detected?

YES>>

Perform diagnosis for P34AD. Refer to DTC Description.

NO>>

GO TO 2.

CHECK ELECTRIC INTAKE VALVE TIMING (IVT) CONTROL ACTUATOR (BANK 1) HALL SENSOR POWER SUPPLY

1. Turn ignition switch OFF.

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

3. Turn ignition switch ON.

4. Check the voltage between electric IVT control actuator (bank 1) harness connector and ground.

   +		−	Voltage (Approx.)
   Electric IVT control actuator (bank 1)
   Connector	Terminal
   F100	4	Ground	5 V

Is the inspection result normal?

YES>>

GO TO 5.

NO>>

GO TO 3.

CHECK ELECTRIC IVT CONTROL MODULE POWER SUPPLY AND GROUND CIRCUIT

Check electric IVT control module power supply and ground circuit. Refer to Diagnosis Procedure.

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Repair or replace error-detected parts.

CHECK ELECTRIC IVT CONTROL ACTUATOR (BANK 1) HALL SENSOR POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect 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
   F100	4	F99	106	Existed

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

Is the inspection result normal?

YES>>

Replace electric IVT control module. Refer to Removal and Installation.

NO>>

Repair or replace error-detected parts.

CHECK ELECTRIC IVT CONTROL ACTUATOR (BANK 1) HALL SENSOR GROUND CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect 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
   F100	8	F99	100	Existed

4. Check harness for short to power.

Is the inspection result normal?

YES>>

GO TO 6.

NO>>

Repair or replace error-detected parts.

CHECK ELECTRIC IVT CONTROL ACTUATOR (BANK 1) HALL SENSOR SIGNAL CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect 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
   F100	5	F99	98	Existed
   	6		107
   	7		99

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

Is the inspection result normal?

YES>>

GO TO 7.

NO>>

Repair or replace error-detected parts.

CHECK ELECTRIC IVT CONTROL ACTUATOR (BANK 1) PHASE SIGNAL CIRCUIT

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

2. 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

3. 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 INTERMITTENT INCIDENT

Check intermittent incident. Refer to Intermittent Incident.

Is the inspection result normal?

YES>>

GO TO 9.

NO>>

Repair or replace error-detected parts.

REPLACE ELECTRIC IVT CONTROL ACTUATOR (BANK 1)

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

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

Is the DTC P34AC detected?

YES>>

Replace electric IVT control module. Refer to Removal and Installation.

NO>>

INSPECTION END