Nissan Pathfinder: Engine Control System - Symptom Diagnosis

• Engine Control System Symptoms
• Does Not Restart After the Stop/start System Is Activated
• Stop/start System Inoperative
• Normal Operating Condition
• Cannot Set Automatic Speed Control Device (ascd)

Engine Control System Symptoms Nissan Pathfinder

Symptom Table

SYSTEM — BASIC ENGINE CONTROL SYSTEM

		SYMPTOM													Reference page
		HARD/NO START/RESTART (EXCP. HA)	ENGINE STALL	HESITATION/SURGING/FLAT SPOT	SPARK KNOCK/DETONATION	LACK OF POWER/POOR ACCELERATION	HIGH IDLE/LOW IDLE	ROUGH IDLE/HUNTING	IDLING VIBRATION	SLOW/NO RETURN TO IDLE	OVERHEATS/WATER TEMPERATURE HIGH	EXCESSIVE FUEL CONSUMPTION	EXCESSIVE OIL CONSUMPTION	BATTERY DEAD (UNDER CHARGE)
Warranty symptom code		AA	AB	AC	AD	AE	AF	AG	AH	AJ	AK	AL	AM	HA
Fuel	Low pressure fuel pump circuit	1	1	2	3	2		2	2			3		2	Component Function Check
	Fuel pressure regulator system	3	3	4	4	4	4	4	4	4		4			Work Procedure
	Fuel injector circuit	1	1	2	3	2		2	2			2			Component Function Check
	Evaporative emission system	3	3	4	4	4	4	4	4	4		4			System Description
	FRP sensor circuit	1	1	2	2	2		2	2			2			DTC DescriptionDTC DescriptionDTC Description
	High pressure fuel pump circuit			4		3									DTC Description
Air	Positive crankcase ventilation system	3	3	4	4	4	4	4	4	4		4	1		Inspection
	Incorrect idle speed adjustment						1	1	1	1		1			Work Procedure
	Electric throttle control actuator	1	1	2	3	3	2	2	2	2		2		2	DTC Description, DTC Description
Ignition	Incorrect ignition timing adjustment	3	3	1	1	1		1	1			1			Work Procedure
	Ignition circuit	1	1	2	2	2		2	2			2			Component Function Check
Main power supply and ground circuit		2	2	3	3	3		3	3		2	3			Diagnosis Procedure
Mass air flow sensor circuit		1	1	2	2	2		2	2			2			DTC Description, DTC DescriptionDTC Description
Engine coolant temperature sensor circuit					3		3			3					DTC Description, DTC Description,DTC Description
Air fuel ratio (A/F) sensor 1 circuit															, DTC Description,DTC Description,DTC Description,DTC Description,DTC Description, DTC Description, DTC Description, DTC Description, DTC Description, DTC Description
Throttle position sensor circuit							2			2					DTC Description, DTC Description, DTC Description, DTC DescriptionDTC Description, DTC Description, DTC Description
Accelerator pedal position sensor circuit				3	2	1									, DTC Description, DTC Description,DTC Description, DTC Description
Heated oxygen sensor 2 circuit				6		6		6	6			5			DTC Description, DTC Description, DTC Description, DTC Description
Knock sensor circuit				2								3			DTC Description, DTC Description, DTC Description, DTC Description
Engine oil temperature sensor circuit				4		2						3			DTC Description, DTC Description, DTC Description
Engine oil pressure sensor circuit				4		4	3	3	3			3			DTC Description
Crankshaft position sensor circuit		2	2												DTC Description
Intake camshaft position sensor circuit				3		2	3								Diagnosis Procedure,Diagnosis Procedure
Exhaust camshaft position sensor circuit		2	2			3		3	3						Diagnosis Procedure, Diagnosis Procedure
Nissan Pathfinder Vehicle speed signal circuit			2	3		3						3			DTC Description
ECM		2	2	3	3	3	3	3	3	3	3	3			—
Electric intake valve timing control module circuit				3		3	3								Diagnosis Procedure, Diagnosis Procedure, Diagnosis Procedure, Diagnosis Procedure
Electric intake valve timing control actuator circuit						3									Diagnosis Procedure, Diagnosis Procedure, Diagnosis Procedure, Diagnosis Procedure
Exhaust valve timing control solenoid valve circuit		2	2	2		2		2	2						DTC Description, DTC Description, DTC Description
PNP signal circuit				3		3		3	3			3			DTC Description
Refrigerant pressure sensor circuit			2				3			3		4			Component Function Check
Electrical load signal circuit								3							Component Function Check
Air conditioner circuit		2	2	3	3	3	3	3	3	3		3		2	Work Flow
ABS actuator and electric unit (control unit)				4											Work Flow,

1 - 6: The numbers refer to the order of inspection.

(continued on next page)

		SYMPTOM													Reference page
		HARD/NO START/RESTART (EXCP. HA)	ENGINE STALL	HESITATION/SURGING/FLAT SPOT	SPARK KNOCK/DETONATION	LACK OF POWER/POOR ACCELERATION	HIGH IDLE/LOW IDLE	ROUGH IDLE/HUNTING	IDLING VIBRATION	SLOW/NO RETURN TO IDLE	OVERHEATS/WATER TEMPERATURE HIGH	EXCESSIVE FUEL CONSUMPTION	EXCESSIVE OIL CONSUMPTION	BATTERY DEAD (UNDER CHARGE)
Warranty symptom code		AA	AB	AC	AD	AE	AF	AG	AH	AJ	AK	AL	AM	HA
Fuel	Fuel tank	5	5												Exploded View
	Fuel piping			5	5	5		5	5			5
	Vapor lock														—
	Valve deposit	5		5	5	5		5	5			5			—
	Poor fuel (Heavy weight gasoline, Low octane)														—
Air	Air duct		5	5		5		5	5			5			Exploded View
	Air cleaner														Exploded View
	Air leakage from air duct (Mass air flow sensor — electric throttle control actuator)	5			5		5			5					Exploded View
	Electric throttle control actuator														Exploded View
	Air leakage from intake manifold/Collector/Gasket														Exploded View, Exploded View
Cranking	Battery	1	1	1		1		1	1			1		1	How to Handle Battery
	Generator circuit														Work Flow (With 165-DSS-5000P), Work Flow (Without 165-DSS-5000P)
	Starter circuit	3													Work Flow (With 165–DSS-5000P), Work Flow (Without 165–DSS-5000P)
	Signal plate	6													Inspection
	PNP signal circuit	4													DTC Logic
Engine	Cylinder head	5	5	5	5	5		5	5			5			Inspection After Disassembly
	Cylinder head gasket										4		3
	Cylinder block	6	6	6	6	6		6	6			6	4		Removal and Installation
	Piston
	Piston ring
	Connecting rod
	Bearing
	Crankshaft
Valve mechanism	Timing chain	5	5	5	5	5		5	5			5			Exploded View
	Camshaft														Inspection After Removal
	Intake valve timing control														Exploded View
	Exhaust valve timing control														Exploded View
	Intake valve												3		Inspection After Disassembly
	Exhaust valve
Exhaust	Tube/Muffler/Gasket	5	5	5	5	5		5	5			5			Exploded View, Exploded View
	Three way catalyst
Lubrication	Oil pan/Oil strainer/Oil pump/Oil filter/Oil gallery	5	5	5	5	5		5	5			5			Exploded View, Exploded View, Removal and Installation, Lubrication Circuit
	Oil level (Low)/Filthy oil														Inspection
	Variable displacement oil pump	5	5		4							4			DTC Description
Cooling	Radiator/Hose/Radiator filler cap	5	5	5	5	5		5	5		4	5			Exploded View, Exploded View
	Water pump														Exploded View (For USA and Canada)
	Water gallery														Cooling Circuit
	Cooling fan									5					Exploded View
	Coolant level (Low)/Contaminated coolant														System Inspection
	Thermostat														Exploded View
NVIS (NISSAN Nissan Pathfinder Vehicle Immobilizer System — NATS)		1	1												Work Flow

1 - 6: The numbers refer to the order of inspection.

Does Not Restart After the Stop/start System Is Activated Nissan Pathfinder Fifth generation

Diagnosis Procedure

CHECK SYMPTOM

Check the symptoms.

A stop/start indicator lamp turned on, and did an engine perform a stall at the time of restart from a stop/start system?

YES>>

GO TO 2.

NO>>

Refer to Symptom Table.

CHECK STOP/START PROHIBIT CAUSE

With CONSULT

Select “Stop/Start prohibit cause data recorder” in “WORK SUPPORT” mode of “ENGINE” using CONSULT.

Is the cause of the engine not starting recorded?

YES>>

Eliminate the cause and complete the inspection.

NO>>

GO TO 3.

CHECK STARTER MOTOR OPERATION

Check the starter motor operation when engine restart during stop/start system operation.

Is the starter motor operated?

YES>>

Refer to Symptom Table.

NO>>

Perform “All DTC Reading” with CONSULT and perform trouble diagnosis for DTC indicated.

Stop/start System Inoperative Nissan Pathfinder

Diagnosis Procedure

NOTE:

Check the stop/start system operation condition. Refer to System Description.

CHECK STOP/START PROHIBIT CAUSE

With CONSULT

Select “Stop/Start prohibit cause data recorder” in “WORK SUPPORT” mode of “ENGINE” using CONSULT.

Does "Stop/Start prohibit cause data recorder" show fail-safe?

YES>>

GO TO 2.

NO>>

Check the operating status of system stop / start. Refer to Symptom Description. After confirmation, go to 4.

CHECK "Stop/Start error" OF CONSULT DATA MONITOR ITEM

With CONSULT

1. Select "Stop/Start error" in "Monitor Menu" of "DATA MONITOR" mode in CONSULT.

2. Check the displayed data monitor items. Refer to CONSULT Function.

Are there any "NG" monitor items?

YES>>

After confirming the "NG" item, go to 3.

NO>>

GO TO 3.

CHECK DTC

With CONSULT

Perform “All DTC Reading” with CONSULT.

Does it detect the DTC associated with "Stop/Start error" of "DATA MONITOR"?

YES>>

Perform trouble diagnosis of detected DTC. After repairing the defective part, go to 4.

NO>>

GO TO 4.

CHECK STOP/START INDICATOR / LAMP

Check the stop/start indicator / lamp.

WARNING LAMP/INDICATOR LAMP / INDICATOR	CONDITION
Stop/start indicator / lamp	Not blinking

Is the stop/start indicator / lamp blinking?

YES>>

Refer to Symptom Table.

NO>>

INSPECTION END

Normal Operating Condition Nissan Pathfinder 2022

Description

FUEL CUT CONTROL (AT NO LOAD AND HIGH ENGINE SPEED)

If the engine speed is above 2,000 rpm under no load (for example, the selector lever position is neutral and engine speed is over 2,000 rpm) fuel will be cut off after some time. The exact time when the fuel is cut off varies based on engine speed.

Fuel cut will be operated until the engine speed reaches 1,100 rpm, then fuel cut will be cancelled.

NOTE:

This function is different from deceleration control listed under direct Injection gasoline System, System Description.

NORMAL OPERATION OF STOP/START SYSTEM

1. When there is no prohibition cause in "Stop / Start prohibition cause data recorder".

Stop/Start system may be deactivated for driver safety and vehicle protection by cooperation with other control units as normal operation. Refer to System Description.

Check displayed items on CONSULT following the table below to confirm relation between cause of stop/start system deactivation and a customer complaint.

If "Driver operation", "S/S OFF switch ON”, "Driving pattern", "Fail-safe" are displayed in "Stop / Start prohibition cause data recorder" of "Work support" of CONSULT, investigate the cause in the table. Also, if the above four points are displayed as the main factors, please ignore the numbers displayed on the CONSULT screen.

CONSULT display		Detailed condition
Work support	Main factors
Stop/Start prohibit cause data recorder	Driving pattern	Not drive the Nissan Pathfinder vehicle at specified speed after turn ignition switch ON. Not pass 5 seconds or more after engine restart. Not drive the Nissan Pathfinder vehicle forward at specified speed after engine restart.
	Driver operation	Shift lever position is at Neutral position and clutch pedal is not depressed. (M/T models) Brake pedal is not depressed. (A/T models)
	S/S OFF switch ON	Stop/Start OFF switch is ON.
	Fail-safe	Fail safe of stop/start system is applied. Select "Stop / Start error" in "Monitor Menu" of "DATA MONITOR" mode of CONSULT, and check if there is any "NG" item. Refer to CONSULT Function.
Stop/Start engine restart cause data recorder	Driving pattern	M/T models - Clutch pedal is slightly depressed when shift lever position is at Neutral position. - Clutch pedal is fully depressed when shift lever position is at except Neutral position. A/T models - Brake pedal is released. - Shift selector is switched from P or N position to D or R position. - Accelerator pedal is depressed. - Paddle shifter is operated when shift selector is at D, L, or M position. - Change gear position when shift selector is at M position.
	S/S OFF switch ON	Stop/Start OFF switch is ON.
	Fail-safe	Fail safe of stop/start system is applied. Select "Stop / Start error" in "Monitor Menu" of "DATA MONITOR" mode of CONSULT, and check if there is any "NG" item. Refer to CONSULT Function.
Stop/Start engine stall cause data recorder	Fail-safe	Fail safe of stop/start system is applied. Select "Stop / Start error" in "Monitor Menu" of "DATA MONITOR" mode of CONSULT, and check if there is any "NG" item. Refer to CONSULT Function.
	Prevent jumping out	One of below condition is satisfied when engine is stopped and gear position is except N position without depressing clutch pedal. - Driving seat door is opened. - Driving seat belt is unfastened. - 5 minutes passes after other system requires restarting engine. Clutch pedal is released cranking.
	Hood open	Hood is opened.

*: Not applicable for this vehicle.

2. When there is a prohibition cause in the "Stop / Start prohibition cause data recorder"

Stop/Start system may be deactivated for driver safety and vehicle protection by cooperation with other control units as normal operation. Refer to System Description.

Check displayed items on CONSULT following the table below to confirm relation between cause of stop/start system deactivation and a customer complaint.

If "System condition" is displayed in "Stop / Start prohibition cause data recorder" of "Work support" of CONSULT, investigate the cause in the table. Also, please check the consultation screen for the explanation of the numbers displayed on the CONSULT screen.

CONSULT display			Detailed condition
Work support	Main factors	Condition item
Stop/Start prohibit cause data recorder	System condition	Hood condition	Open
		Driving seat door	Open
		Driving seat belt	Not fastened
		ABS condition	Operating NOTE: If ABS system is activated, drive the Nissan Pathfinder vehicle at 12 km/h (7.5 MPH) or more after stop the vehicle.
		VDC condition	Brake control system prohibits stop/start system operation.
		Negative pressure cond	Below specified pressure
		AC cond	Air conditioner system prohibits stop/start system operation.
		Power supply cond	Power supply system prohibits stop/start system operation. The battery is depleted. Insufficient battery charge. Check whether use battery designed for stop/start system. Refer to Battery.
		IPA condition	Operating
		ProPILOT condition	ProPILOT system prohibits stop/start system operation.
		ABH condition	Automatic brake hold system prohibits stop/start system operation.(Brake fluid pressure is insufficient.)
		I-KEY condition	Intelligent key is outside Nissan Pathfinder vehicle.
		4WD mode	4WD mode is selected.
		Delivery mode	ON NOTE: No activation in market
		Continuous times	Starter becomes hot due to continuous operation.
		ST RLY OFF exp	Starter relay which is connected to BCM is not turned off after engine restart.
		DC/DC temp cond	Above specified temperature (CVT models)
		Neutral SW OFF exp *	Neutral switch is not turned off after engine restart. (M/ T models)
		ENG/TM condition	Engine or transmission conditions are not satisfied.
		ST RLY condition	Starter relay which is connected to BCM is turned on.
		Steering condition	Steer
		Slope condition	Above specified degrees
		Brake fluid pressure	Above specified pressure
		Automatic emergency braking	Automatic emergency braking system prohibits stop/start system operation.
		TOW mode	"TOW" mode is selected as the drive mode.
		Drive mode	—
Stop/Star engine restart cause data recorder	System condition	VDC condition	Brake control system requires restarting engine.
		Negative pressure cond	Below specified pressure.
		AC cond	Air conditioner requires restarting engine.
		Power supply cond	Power supply system requires restarting engine.
		IPA condition	Operating
		ProPILOT condition	ProPILOT system requires restarting engine.
		ABH condition	Automatic brake hold system requires restarting engine.
		I-KEY condition	Intelligent key is outside Nissan Pathfinder vehicle.
		Vehicle speed cond	Above specified speed.
		ENG/TM condition	Engine or transmission are satisfied.
		Steering condition	Steer (A/T models)
		DC/DC temp cond	Above specified temperature (CVT models)
		Driving seat door	Open
		Driving seat belt	Unfastened
		Automatic emergency braking	Automatic emergency braking system prohibits stop/start system operation.
		TOW mode	"TOW" mode is selected as the drive mode.
		Drive mode	—

*: Not applicable for this vehicle.

Cannot Set Automatic Speed Control Device (ascd) Nissan Pathfinder R53

Diagnosis Procedure

PERFORM SELF-DIAGNOSIS

With CONSULT

Perform ECM self-diagnosis.

Is DTC detected?

YES>>

Perform diagnosis of applicable.

NO>>

GO TO 2.

CHECK BRAKE PEDAL POSITION SWITCH

Check brake pedal position switch. Refer to Diagnosis Procedure.

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Repair or replace error-detected parts.