Nissan Pathfinder: Ecu Diagnosis Information - Intelligent Key Unit ++

Nissan Pathfinder (R53) 2022-2025 Service Manual / Body Exterior, Doors, Roof & Vehicle Security :: Door & Lock / Ecu Diagnosis Information / Intelligent Key Unit ++

Reference Value

VALUES ON THE DIAGNOSIS TOOL

NOTE:

The following table includes information (items) inapplicable to this Nissan Pathfinder vehicle. For information (items) applicable to this vehicle, refer to CONSULT display items.

CONSULT MONITOR ITEM
Monitor Item	Condition	Value/Status
I-KEY unit blank status	Intelligent Key unit is registered	Off
I-KEY unit blank status	Intelligent Key unit is not registered (blank status)	On
I-KEY unit power supply status	Intelligent Key unit power supply normally	Off
I-KEY unit power supply status	Intelligent Key unit power supply malfunction NOTE: Less than 6 V or more than 16 V	On
KEY ID1	Which pressing the door request switch carrying the Intelligent Key #1	On
KEY ID1	Other than above	Off
KEY ID2	Which pressing the door request switch carrying the Intelligent Key #2	On
KEY ID2	Other than above	Off
KEY ID3	Which pressing the door request switch carrying the Intelligent Key #3	On
KEY ID3	Other than above	Off
KEY ID4	Which pressing the door request switch carrying the Intelligent Key #4	On
KEY ID4	Other than above	Off
Battery voltage	Ignition switch ON	10 – 16 V
IGN ON (IPDM E/R)	Other than ignition switch ON	Off
IGN ON (IPDM E/R)	Ignition switch ON	On
Nissan Pathfinder Vehicle speed (ABS)	While driving	Equivalent to speedometer reading
Nissan Pathfinder Vehicle speed (meter)	While driving	Equivalent to speedometer reading
Total distance	While driving	Indicates total Nissan Pathfinder vehicle distance
Keyfob button1	Other than below	Off
Keyfob button1	Without remote engine start models and with automatic back door models: UNLOCK button is pressed Except without remote engine start models and with automatic back door models: LOCK button is pressed	On
Keyfob button2	Other than below	Off
Keyfob button2	Without remote engine start models and with automatic back door models: LOCK button is pressed Except without remote engine start models and with automatic back door models: REMOTE ENGINE START button is pressed	On
Keyfob button3	Other than below	Off
Keyfob button3	With remote engine start and without automatic back door models: UNLOCK button is pressed With automatic back door models: POWER BACK DOOR button is pressed	On
Keyfob button4	Other than below	Off
Keyfob button4	PANIC button is pressed	On
BD/TR opener SW	When back door opener switch circuit is malfunction	Malf
	When back door opener switch is not pressed	Off
	When back door opener switch is pressed	On
Key ID (last)	When any keyfob button is pressed	1,2,3,4
Keyfob#1 cabin area	Other than below	Off
Keyfob#1 cabin area	When Intelligent Key #1 is in cabin area, press the door request switch carrying other Keyfob	On
Keyfob#1 undefined area	When Intelligent Key #1 is detected by multiple inside/ outside key antenna	Off
Keyfob#1 undefined area	When Intelligent Key #1 is out of range of the defined Intelligent Key unit area	On
Keyfob#1 rear bumper area	Other than below	Off
Keyfob#1 rear bumper area	When press the back door request switch carrying Intelligent Key #1	On
Keyfob#2 cabin area	Other than below	Off
Keyfob#2 cabin area	When Intelligent Key #2 is in cabin area, press the door request switch carrying other Keyfob	On
Keyfob#2 undefined area	When Intelligent Key #2 is detected by multiple inside/ outside key antenna	Off
Keyfob#2 undefined area	When Intelligent Key #2 is out of range of the defined Intelligent Key unit area	On
Keyfob#2 rear bumper area	Other than below	Off
Keyfob#2 rear bumper area	When press the back door request switch carrying Intelligent Key #2	On
Keyfob#3 cabin area	Other than below	Off
Keyfob#3 cabin area	When Intelligent Key #3 is in cabin area, press the door request switch carrying other Keyfob	On
Keyfob#3 undefined area	When Intelligent Key #3 is detected by multiple inside/ outside key antenna	Off
Keyfob#3 undefined area	When Intelligent Key #3 is out of range of the defined Intelligent Key unit area	On
Keyfob#3 rear bumper area	Other than below	Off
Keyfob#3 rear bumper area	When press the back door request switch carrying Intelligent Key #3	On
Keyfob#4 cabin area	Other than below	Off
Keyfob#4 cabin area	When Intelligent Key #4 is in cabin area, press the door request switch carrying other Keyfob	On
Keyfob#4 undefined area	When Intelligent Key #4 is detected by multiple inside/ outside key antenna	Off
Keyfob#4 undefined area	When Intelligent Key #4 is out of range of the defined Intelligent Key unit area	On
Keyfob#4 rear bumper area	Other than below	Off
Keyfob#4 rear bumper area	When press the back door request switch carrying Intelligent Key #4	On
Keyfob button5	Other than below	Off
Keyfob button5	With automatic back door models: REMOTE ENGINE START button is pressed	On
Keyfob operation	Keyfob button is not pressed	Off
	UNLOCK button is pressed	Unlock
	LOCK button is pressed	Lock
	Automatic back door button is pressed	TR/BD
	PANIC button is pressed	Panic
	NOTE: This item is displayed, but cannot be monitored	ASD (RH)
	NOTE: This item is displayed, but cannot be monitored	ASD (LH)
	NOTE: This item is displayed, but cannot be monitored	Light
	Remote engine start button is pressed	Eng start
	NOTE: This item is displayed, but cannot be monitored	Roof
Push SW	Push-button ignition switch (push-switch) is pressed	Off
Push SW	Push-button ignition switch (push-switch) is not pressed	On
Request SW (FR)	When front door request switch RH is not pressed	Off
Request SW (FR)	When front door request switch RH is pressed	On
Request SW (FL)	When front door request switch LH is not pressed	Off
Request SW (FL)	When front door request switch LH is pressed	On
Request SW (BD)	When back door request switch is not pressed	Off
Request SW (BD)	When back door request switch is pressed	On
Registration Key ID status	Intelligent Key is not registered	Off
Registration Key ID status	Intelligent Key is registered	On
Keyfob#1 outside area (LH)	When Intelligent Key #1 is out of range of outside key antenna (rear door LH)	Off
Keyfob#1 outside area (LH)	When Intelligent Key #1 is in range of outside key antenna (rear door LH)	On
Keyfob#1 outside area (RH)	When Intelligent Key #1 is out of range of outside key antenna (rear door RH)	Off
Keyfob#1 outside area (RH)	When Intelligent Key #1 is in range of outside key antenna (rear door RH)	On
Keyfob#2 outside area (LH)	When Intelligent Key #2 is out of range of outside key antenna (rear door LH)	Off
Keyfob#2 outside area (LH)	When Intelligent Key #2 is in range of outside key antenna (rear door LH)	On
Keyfob#2 outside area (RH)	When Intelligent Key #2 is out of range of outside key antenna (rear door RH)	Off
Keyfob#2 outside area (RH)	When Intelligent Key #2 is in range of outside key antenna (rear door RH)	On
Keyfob#3 outside area (LH)	When Intelligent Key #3 is out of range of outside key antenna (rear door LH)	Off
Keyfob#3 outside area (LH)	When Intelligent Key #3 is in range of outside key antenna (rear door LH)	On
Keyfob#3 outside area (RH)	When Intelligent Key #3 is out of range of outside key antenna (rear door RH)	Off
Keyfob#3 outside area (RH)	When Intelligent Key #3 is in range of outside key antenna (rear door RH)	On
Keyfob#4 outside area (LH)	When Intelligent Key #4 is out of range of outside key antenna (rear door LH)	Off
Keyfob#4 outside area (LH)	When Intelligent Key #4 is in range of outside key antenna (rear door LH)	On
Keyfob#4 outside area (RH)	When Intelligent Key #4 is out of range of outside key antenna (rear door RH)	Off
Keyfob#4 outside area (RH)	When Intelligent Key #4 is in range of outside key antenna (rear door RH)	On
Keyfob#1 battery low	Intelligent Key unit detects low battery in Intelligent Key #1	0 – 6
Keyfob#2 battery low	Intelligent Key unit detects low battery in Intelligent Key #2	0 – 6
Keyfob#3 battery low	Intelligent Key unit detects low battery in Intelligent Key #3	0 – 6
Keyfob#4 battery low	Intelligent Key unit detects low battery in Intelligent Key #4	0 – 6
Battery voltage (IPDM E/R)	Ignition switch ON	10 – 18 V
Nissan Pathfinder Vehicle condition	Intelligent Key unit status is low power consumption mode (sleep mode)	Sleep
	Intelligent Key unit status is low power consumption mode (normal mode)	Wake up
	Power supply position is "OFF"	OFF
	Power supply position is "ACC"	ACC
	Power supply position is "IGN ON"	IGN ON
	Power supply position is "Cranking"	Cranking
	Power supply position is "Running"	Running
	While the engine stop/start status	stop/start
	While the engine stalled status	Stalled
S/L power output	NOTE: This item is displayed, but cannot be monitored	Off
Request SW (RR)*	When rear door request switch RH is not pressed	Off
Request SW (RR)*	When rear door request switch RH is pressed	On
Request SW (RL)*	When rear door request switch LH is not pressed	Off
Request SW (RL)*	When rear door request switch LH is pressed	On

*: This item is monitored only for vehicle with rear request switch models

TERMINAL LAYOUT

PHYSICAL VALUES

NOTE:

Waveform reference

Terminal No. (Wire color)		Description		Condition		Value (Approx.)
Terminal No. (Wire color)		Signal name	Input/ Output
(+)	(-)	Signal name	Input/ Output
1 (LA/SB)	Ground	Battery power supply	Input	—		Battery voltage
3 (G)	Ground	Intelligent Key warning buzzer	Output	Intelligent Key warning buzzer	Sounding NOTE: The pulse cycle changes depending on buzzer sounds.
3 (G)	Ground	Intelligent Key warning buzzer	Output	Intelligent Key warning buzzer	Not sounding	0 V
4 (BR)	Ground	Door request switch (front door LH)	Input	Door request switch (front door LH)	ON (pressed)	0 V
4 (BR)	Ground	Door request switch (front door LH)	Input	Door request switch (front door LH)	OFF (not pressed)	12 V
5 (LG)	Ground	Back door request switch	Input	Back door request switch	ON (pressed)	0 V
5 (LG)	Ground	Back door request switch	Input	Back door request switch	OFF (not pressed)	12 V
6 (L)	Ground	CAN-High	Input/ Output	—		—
7 (P)	Ground	CAN-Low	Input/ Output	—		—
9 (BG)	Ground	Push-button ignition switch	Input	Push-button ignition switch	Pressed	0 V
9 (BG)	Ground	Push-button ignition switch	Input	Push-button ignition switch	Not pressed	12 V
10 (L)	Ground	Push-button ignition switch illumination power supply	Output	Push-button ignition switch illumination	OFF	0 V
10 (L)	Ground	Push-button ignition switch illumination power supply	Output	Push-button ignition switch illumination	ON
11 (L)	Ground	Door request switch (front door RH)	Input	Door request switch (front door RH)	ON (pressed)	0 V
11 (L)	Ground	Door request switch (front door RH)	Input	Door request switch (front door RH)	OFF (not pressed)	12 V
16* (P)	Ground	Door request switch (rear door RH)	Input	Door request switch (rear door RH)	ON (pressed)	0 V
16* (P)	Ground	Door request switch (rear door RH)	Input	Door request switch (rear door RH)	OFF (not pressed)	12 V
19 (LA/R)	Ground	NATS antenna amp.	Input/Output	Intelligent Key battery is removed and brake pedal is depressed	When a registered Intelligent Key backside is contacted to push-button ignition switch	0 V
		NATS antenna amp.	Input/Output		Other than above
		Inside key antenna	Output	Press push-button ignition switch	When Intelligent Key is in the passenger compartment
		Inside key antenna	Output	Press push-button ignition switch	When Intelligent Key is not in the passenger compartment
20 (LA/G)	Ground	NATS antenna amp.	Input/Output	Intelligent Key battery is removed and brake pedal is depressed	When a registered Intelligent Key backside is contacted to push-button ignition switch	0 V
		NATS antenna amp.	Input/Output		Other than above
		Inside key antenna	Output	Press push-button ignition switch	When Intelligent Key is in the passenger compartment
		Inside key antenna	Output	Press push-button ignition switch	When Intelligent Key is not in the passenger compartment
25* (V)	Ground	Door request switch (rear door LH)	Input	Door request switch (rear door LH)	ON (pressed)	0 V
25* (V)	Ground	Door request switch (rear door LH)	Input	Door request switch (rear door LH)	OFF (not pressed)	12 V
29 (B)	Ground	Ground	—	—		0 V
31 (LA/P)	Ground	Outside key antenna (rear door RH)	Output	When the door request switch (front door RH or rear door RH) is operated with ignition switch ON	When Intelligent Key is in the antenna detection area
31 (LA/P)	Ground	Outside key antenna (rear door RH)	Output		When Intelligent Key is not in the antenna detection area
32 (LA/L)	Ground	Outside key antenna (rear door RH)	Output	When the door request switch (front door RH or rear door RH) is operated with ignition switch ON	When Intelligent Key is in the antenna detection area
32 (LA/L)	Ground	Outside key antenna (rear door RH)	Output		When Intelligent Key is not in the antenna detection area
33 (P)	Ground	Inside key antenna (console)	Output	Press push-button ignition switch	When Intelligent Key is in the passenger compartment
33 (P)	Ground	Inside key antenna (console)	Output	Press push-button ignition switch	When Intelligent Key is not in the passenger compartment
34 (GR)	Ground	Inside key antenna (console)	Output	Press push-button ignition switch	When Intelligent Key is in the passenger compartment
34 (GR)	Ground	Inside key antenna (console)	Output	Press push-button ignition switch	When Intelligent Key is not in the passenger compartment
35 (LA/V)	Ground	Outside key antenna (rear door LH)	Output	When the door request switch (front door LH or rear door LH) is operated with ignition switch ON	When Intelligent Key is in the antenna detection area
35 (LA/V)	Ground	Outside key antenna (rear door LH)	Output		When Intelligent Key is not in the antenna detection area
36 (LA/W)	Ground	Outside key antenna (rear door LH)	Output	When the door request switch (front door LH or rear door LH) is operated with ignition switch ON	When Intelligent Key is in the antenna detection area
36 (LA/W)	Ground	Outside key antenna (rear door LH)	Output		When Intelligent Key is not in the antenna detection area
37 (LA/V)	Ground	Outside key antenna (rear bumper)	Output	When the back door request switch is operated with ignition switch ON	When Intelligent Key is in the antenna detection area
37 (LA/V)	Ground	Outside key antenna (rear bumper)	Output		When Intelligent Key is not in the antenna detection area
38 (LA/W)	Ground	Outside key antenna (rear bumper)	Output	When the back door request switch is operated with ignition switch ON	When Intelligent Key is in the antenna detection area
38 (LA/W)	Ground	Outside key antenna (rear bumper)	Output		When Intelligent Key is not in the antenna detection area
39 (LA/L)	Ground	Inside key antenna (luggage room)	Output	Press push-button ignition switch	When Intelligent Key is in the passenger compartment
39 (LA/L)	Ground	Inside key antenna (luggage room)	Output	Press push-button ignition switch	When Intelligent Key is not in the passenger compartment
40 (LA/LG)	Ground	Inside key antenna (luggage room)	Output	Press push-button ignition switch	When Intelligent Key is in the passenger compartment
40 (LA/LG)	Ground	Inside key antenna (luggage room)	Output	Press push-button ignition switch	When Intelligent Key is not in the passenger compartment

*: With rear door request switch models

DTC Inspection Priority Chart

If some DTCs are displayed at the same time, perform inspections one by one based on the following priority chart.

Priority	DTC
1	B2010-1C: Battery voltage B2001-45: Intelligent Key unit B2002-43: Intelligent Key unit B2046-42: EEPROM B2046-46: EEPROM
2	U2140-87: CAN ECM U214E-87: CAN METER U214F-86: CAN BCM U2148-87: CAN VDC U2152-86: CAN comm err (ADAS control unit) U215B-86: CAN USM
3	B2033-4A: DONGLE NG B2090-14: NATS antenna amp.
4	B2042-4A: Electric shift authentication fail B2043-4A: Electric shift ID discord B2044-4A: Electric shift ID registration fail B2045-4A: Electric shift ID discord B2047-87: Electric shift communication fail
5	B2080-01: Power switch B2080-1C: Power switch B2080-12: Power switch B2080-14: Power switch B2087-08: One touch sensor (FL) B2087-11: One touch sensor (FL) B2087-23: One touch sensor (FL) B2087-24: One touch sensor (FL) B2087-44: One touch sensor (FL) B2088-08: One touch sensor (FR) B2088-11: One touch sensor (FR) B2088-23: One touch sensor (FR) B2088-24: One touch sensor (FR) B2088-44: One touch sensor (FR) B2089-08: One touch sensor (RL) B2089-11: One touch sensor (RL) B2089-23: One touch sensor (RL) B2089-24: One touch sensor (RL) B2089-44: One touch sensor (RL) B2091-08: One touch sensor (RR) B2091-11: One touch sensor (RR) B2091-23: One touch sensor (RR) B2091-24: One touch sensor (RR) B2091-44: One touch sensor (RR) B2086-23: Request SW (BD/TR) B2070-68: Key registration
6	B203C-14: Inside antenna B203E-14: Outside antenna B203F-14: Outside antenna B2040-14: Outside antenna

DTC Index

NOTE:

The details of time display are as follows.

CRNT: A malfunction is detected now.

PAST: A malfunction was detected in the past.

Self Diagnostic Result
CONSULT display	Fail-safe	Intelligent Key system malfunction displays	Reference page
No DTC is detected. Further testing may be required.	—	—	—
B2001-45: Intelligent Key unit	—	—	DTC Description
B2002-43: Intelligent Key unit	—	—	DTC Description
B2010-1C: Battery voltage	—	—	DTC Description
B2033-4A: DONGLE NG	—	—	DTC Description
B203C-14: Inside antenna	—	—	DTC Description
B203E-14: Outside antenna	—	—	DTC Description
B203F-14: Outside antenna	—	—	DTC Description
B2040-14: Outside antenna	—	—	DTC Description
B2042-4A: Electric shift authentication fail	×	—	DTC Description
B2043-4A: Electric shift ID discord	×	—	DTC Description
B2044-4A: Electric shift ID registration fail	×	—	DTC Description
B2045-4A: Electric shift ID discord	×	—	DTC Description
B2047-87: Electric shift communication fail	×	—	DTC Description
B2046-42: EEPROM	—	—	DTC Description
B2046-46: EEPROM	—	—	DTC Description
B2070-68: Key registration	—	—	DTC Description
B2080-01: Power switch	—	—	DTC Description
B2080-1C: Power switch	—	—
B2080-12: Power switch	—	—
B2080-14: Power switch	—	—
B2086-23: Request SW (BD/TR)	—	—	DTC Description
B2087-08: One touch sensor (FL)	—	—	DTC Description
B2087-11: One touch sensor (FL)	—	—
B2087-23: One touch sensor (FL)	—	—
B2087-24: One touch sensor (FL)	—	—
B2087-44: One touch sensor (FL)	—	—
B2088-08: One touch sensor (FR)	—	—	DTC Description
B2088-11: One touch sensor (FR)	—	—
B2088-23: One touch sensor (FR)	—	—
B2088-24: One touch sensor (FR)	—	—
B2088-44: One touch sensor (FR)	—	—
B2089-08: One touch sensor (RL)	—	—	DTC Description
B2089-11: One touch sensor (RL)	—	—
B2089-23: One touch sensor (RL)	—	—
B2089-24: One touch sensor (RL)	—	—
B2089-44: One touch sensor (RL)	—	—
B2091-08: One touch sensor (RR)	—	—	DTC Description
B2090-14: NATS antenna amp.	—	—
B2091-11: One touch sensor (RR)	—	—
B2091-23: One touch sensor (RR)	—	—
B2091-24: One touch sensor (RR)	—	—
B2091-44: One touch sensor (RR)	—	—

Network-DTC
CONSULT display	Fail-safe	Intelligent Key system malfunction displays	Reference page
U2140-87: CAN ECM	—	—	DTC Description
U2148-87: CAN VDC	—	—	DTC Description
U214E-87: CAN METER	—	—	DTC Description
U214F-86: CAN BCM	—	—	DTC Description
U2152-86: CAN comm err (ADAS control unit)	—	—	DTC Description
U215B-86: CAN USM	—	—	DTC Description