Nissan Pathfinder: Security Control System - Dtc/circuit Diagnosis

• P161d-00 Immobilizer
• P161e-00 Immobilizer
• P161f-00 Immobilizer
• B2c20-12 Starter Control Relay
• B2c20-23 Starter Control Relay
• B2f70-01 Stop Lamp
• B2f71-23 Stop Lamp
• B2f72-23 Stop Lamp
• B2080 Power Switch
• B2033-4a Dongle Ng
• B2042-4a Electric Shift Authentication Fail
• B2043-4a Electric Shift Id Discord
• B2070-68 Key Registration
• B2090-14 Nats Antenna Amp.
• Hood Switch
• Horn Function
• Starter Cut Relay
• Stop Lamp Switch
• Brake Pedal Position Switch

P161d-00 Immobilizer Nissan Pathfinder R53

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen items (Trouble diagnosis content)	DTC detecting condition
P161D-00	IMMOBILIZER (Immobilizer)	Diagnosis condition	Ignition switch ON
		Signal (terminal)	—
		Threshold	When key registration has not been completed normally after replacing Intelligent Key unit.
		Diagnosis delay time	1 second or less

POSSIBLE CAUSE

• Improper key registration operation

• EPS control unit

• Intelligent Key unit

FAIL-SAFE

—

CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

CONSULT

1. Ignition switch ON.

2. Select “Self Diagnostic Result” mode of “ENGINE”.

Is the DTC detected?

YES>>

Refer to DTC Diagnosis Procedure.

NO>>

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

NO>>

Confirmation after repair: Inspection End.

DTC Diagnosis Procedure

CHECK DTC PRIORITY OF INTELLIGENT KEY UNIT

If DTC P161D-00 is displayed with DTC B2033-4A, first perform the trouble diagnosis for DTC B2033-4A.

Is DTC B2033-4A detected?

YES>>

Perform diagnosis of applicable. DTC B2033-4A: Refer to DTC Description.

NO>>

GO TO 2.

INTELLIGENT KEY REGISTRATION

CONSULT

1. Perform registration of all Intelligent Keys.

   For registration procedures, refer to CONSULT immobilizer mode and follow the on-screen instructions.

2. Erase DTC.

3. Perform DTC confirmation procedure for DTC P161D-00. Refer to DTC Description.

Is DTC P161D-00 detected?

YES>>

GO TO 3.

NO>>

Inspection End.

REPLACE INTELLIGENT KEY UNIT

1. Replace Intelligent Key unit. Refer to Removal and Installation.

2. Erase DTC.

3. Perform DTC confirmation procedure for DTC P161D-00. Refer to DTC Description.

4. Check that the DTC is not detected.

>>

Inspection End.

P161e-00 Immobilizer Nissan Pathfinder 2025

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen items (Trouble diagnosis content)	DTC detecting condition
P161E-00	IMMOBILIZER (Immobilizer)	Diagnosis condition	Ignition switch ON
		Signal (terminal)	—
		Threshold	When CONSULT is not used during ECM replacement.
		Diagnosis delay time	1 second or less

POSSIBLE CAUSE

• Intelligent Key unit

• ECM

FAIL-SAFE

Inhibit engine cranking

CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

CONSULT

1. Ignition switch ON.

2. Select “Self Diagnostic Result” mode of “ENGINE”.

Is the DTC detected?

YES>>

Refer to DTC Diagnosis Procedure.

NO>>

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

NO>>

Confirmation after repair: Inspection End.

DTC Diagnosis Procedure

ECM REGISTRATION

CONSULT

Register ECM.

Is the DTC detected?

YES>>

GO TO 2.

NO>>

Inspection End.

REPLACE INTELLIGENT KEY UNIT

Replace Intelligent Key unit. Refer to Removal and Installation.

Is the DTC detected?

YES>>

GO TO 3.

NO>>

Inspection End.

REPLACE ECM

Replace ECM. Refer to Removal and Installation.

>>

Inspection End.

P161f-00 Immobilizer Nissan Pathfinder SUV

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen items (Trouble diagnosis content)	DTC detecting condition
P161F-00	IMMOBILIZER (Immobilizer)	Diagnosis condition	Ignition switch ON
		Signal (terminal)	—
		Threshold	When Intelligent Key unit detects an immobilizer malfunction and engine start is prohibited.
		Diagnosis delay time	1 second or less

POSSIBLE CAUSE

ECM

FAIL-SAFE

Inhibit engine cranking

CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

CONSULT

1. Ignition switch ON.

2. Select “Self Diagnostic Result” mode of “ENGINE”.

Is the DTC detected?

YES>>

Refer to DTC Diagnosis Procedure.

NO>>

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

NO>>

Confirmation after repair: Inspection End.

DTC Diagnosis Procedure

REPLACE ECM

Replace ECM. Refer to Removal and Installation.

>>

Inspection End.

B2c20-12 Starter Control Relay Nissan Pathfinder

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen items (Trouble diagnosis content)	DTC detecting condition
B2C20-12	Starter control relay (Starter control relay)	Diagnosis condition	Ignition switch ON
		Signal (terminal)	Starter cut relay signal
		Threshold	When BCM detects starter cut relay circuit is short to buttery
		Diagnosis delay time	1 second or less

POSSIBLE CAUSE

• Harness or connectors

  (Starter cut relay circuit is short to battery)

• Starter cut relay

FAIL-SAFE

—

CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

CONSULT

1. Press ignition switch under the following conditions and wait 1 second or more.

   • Selector lever: In the P position.

   • Brake pedal: Depressed.

2. Select “Self Diagnostic Result” mode of “BCM”.

Is the DTC detected?

YES>>

Refer to DTC Diagnosis Procedure.

NO>>

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

NO>>

Confirmation after repair: Inspection End.

DTC Diagnosis Procedure

CHECK STARTER CUT RELAY INPUT SIGNAL

Check voltage between BCM harness connector and ground.

(+)		(-)	Condition	Voltage (Approx.)
BCM
Connector	Terminal
M80	123	Ground	Other than following	Battery voltage
			At engine cranking	0 V

Is the inspection result normal?

YES>>

Inspection End.

NO>>

GO TO 2.

CHECK STARTER CUT RELAY INPUT SIGNAL CIRCUIT

1. Ignition switch OFF.

2. Disconnect BCM connector and starter cut relay connector.

3. Check continuity between BCM harness connector and starter cut relay harness connector.

   BCM		Starter cut relay		Continuity
   Connector	Terminal	Connector	Terminal
   M80	123	E36	8	Yes

4. Check continuity between BCM harness connector and ground.

   BCM		(–)	Continuity
   Connector	Terminal
   M80	123	Ground	No

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair or replace harness.

CHECK STARTER CUT RELAY

Check starter cut relay. Refer to Component Inspection.

Is the inspection result normal?

YES>>

Inspection End.

NO>>

Replace starter cut relay.

B2c20-23 Starter Control Relay Nissan Pathfinder 5th Gen

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen items (Trouble diagnosis content)	DTC detecting condition
B2C20-23	Starter control relay (Starter control relay)	Diagnosis condition	Ignition switch ON
		Signal (terminal)	Starter cut relay signal Starter cut relay status signal (CAN)
		Threshold	When the starter cut relay status signal transmitted from IPDM E/R via CAN communication is OFF after even though BCM is operating the starter cut relay ON output.
		Diagnosis delay time	1 second or less

POSSIBLE CAUSE

• Harness or connectors

  (The CAN communication line is open or shorted)

• Harness or connectors

  (Starter cut relay circuit is short to ground or open)

• Starter cut relay

FAIL-SAFE

—

CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

CONSULT

1. Press ignition switch under the following conditions and wait 1 second or more.

   • Selector lever: In the P position.

   • Brake pedal: Depressed.

2. Select “Self Diagnostic Result” mode of “BCM”.

Is the DTC detected?

YES>>

Refer to DTC Diagnosis Procedure.

NO>>

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

NO>>

Confirmation after repair: Inspection End.

DTC Diagnosis Procedure

CHECK STARTER CUT RELAY INPUT SIGNAL

Check voltage between BCM harness connector and ground.

(+)		(-)	Condition	Voltage (Approx.)
BCM
Connector	Terminal
M80	123	Ground	Other than following	Battery voltage
			At engine cranking	0 V

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

GO TO 2.

CHECK STARTER CUT RELAY INPUT SIGNAL CIRCUIT

1. Ignition switch OFF.

2. Disconnect BCM connector and starter cut relay connector.

3. Check continuity between BCM harness connector and starter cut relay harness connector.

   BCM		Starter cut relay		Continuity
   Connector	Terminal	Connector	Terminal
   M80	123	E36	8	Yes

4. Check continuity between BCM harness connector and ground.

   BCM		—	Continuity
   Connector	Terminal
   M80	123	Ground	No

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair or replace harness.

CHECK FUSIBLE LINK

Check that the following fusible link is not blown (open).

Signal name	Fusible link	Capacity
Battery power supply	R	30 A

Is the fusible link blown (open)?

YES>>

Replace the blown (open) fusible link after repairing the affected circuit if a fusible link is blown (open).

NO>>

GO TO 6.

CHECK STARTER CUT RELAY OUTPUT SIGNAL

Check voltage between IPDM E/R harness connector and ground.

(+)		(-)	Condition	Voltage (Approx.)
IPDM E/R
Connector	Terminal
E77	86	Ground	Other than at engine cranking	Less than 4 V (IPDM E/R always outputs the voltage to detect the ON/ OFF state of starter cut relay)
			At engine cranking	Battery voltage

Is the inspection result normal?

YES>>

Inspection End.

NO>>

GO TO 5.

CHECK STARTER CUT RELAY OUTPUT SIGNAL CIRCUIT

1. Ignition switch OFF.

2. Disconnect IPDM E/R connector and starter cut relay connector.

3. Check continuity between IPDM E/R harness connector and starter cut relay harness connector.

   IPDM E/R		Starter cut relay		Continuity
   Connector	Terminal	Connector	Terminal
   E77	86	E36	6	Yes

4. Check continuity between IPDM E/R harness connector and ground.

   IPDM E/R		—	Continuity
   Connector	Terminal
   E77	86	Ground	No

Is the inspection result normal?

YES>>

GO TO 6.

NO>>

Repair or replace harness.

CHECK STARTER CUT RELAY

Check starter cut relay. Refer to Component Inspection.

Is the inspection result normal?

YES>>

Inspection End.

NO>>

Replace starter cut relay.

B2f70-01 Stop Lamp Nissan Pathfinder Fifth generation

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen items (Trouble diagnosis content)	DTC detecting condition
B2F70-01	Stop lamp (Stop lamp)	Diagnosis condition	When brake pedal is depressed
		Signal (terminal)	Stop lamp switch 1 signal Stop lamp switch 2 signal
		Threshold	BCM makes a comparison between stop lamp switch 1 signal and stop lamp switch 2 signal. It judges from their values to detect the malfunctioning circuit 10 consecutive times
		Diagnosis delay time	Depress brake pedal 10 times

POSSIBLE CAUSE

• Harness or connectors

  (Stop lamp switch circuit is open or shorted)

• Stop lamp switch

• Fuse

FAIL-SAFE

—

CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

CONSULT

1. Depress brake pedal 10 times.

2. Ignition switch ON.

3. Check DTC in “Self Diagnostic Result” mode of “BCM”.

Is DTC detected?

YES>>

Refer to DTC Diagnosis Procedure.

NO>>

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

NO>>

Confirmation after repair: Inspection End.

DTC Diagnosis Procedure

CHECK BRAKE PEDAL POSITION SWITCH

CONSULT

1. Select “Brake switch 1” and “Brake switch 2” in “Data Monitor” mode of “SIGNAL BUFFER” of “BCM”.

2. Check “Brake switch 1” and “Brake switch 2” indication under the following condition.

Monitor item	Condition		Indication
Brake switch 1	Brake pedal	Depressed	Off
		Not depressed	On
Brake switch 2		Depressed	On
		Not depressed	Off

Is the indication normal?

YES>>

Brake pedal position switch is OK.

NO>>

Brake switch 1: GO TO 2.

NO>>

Brake switch 2: GO TO 7.

CHECK FUSE

Check that the following fuse is not blown (open).

Signal name	Fuse No.	Capacity
Battery power supply	32	10 A

Is the fuse blown (open)?

YES>>

Replace the blown (open) fuse after replacing the cause of blown (open).

NO>>

GO TO 3.

CHECK BRAKE PEDAL POSITION SWITCH SIGNAL

1. Ignition switch OFF.

2. Disconnect BCM connector.

3. Ignition switch ON.

4. Check voltage between BCM harness connector and ground.

   (+)		(–)	Condition	Voltage (Approx.)
   BCM
   Connector	Terminal
   M80	111	Ground	Brake pedal position switch 1 ON (brake pedal is not depressed)	Battery voltage
   			Brake pedal position switch 1 OFF (brake pedal is depressed)	0 V

Is the inspection normal?

YES>>

Inspection End.

NO>>

GO TO 4.

CHECK BRAKE PEDAL POSITION SWITCH POWER SUPPLY CIRCUIT

1. Ignition switch OFF.

2. Disconnect brake pedal position switch connector.

3. Ignition switch ON.

4. Check voltage between brake pedal position switch harness connector and ground.

   (+)		(–)	Voltage (Approx.)
   Brake pedal position switch
   Connector	Terminal
   E76	1	Ground	Battery voltage

Is the inspection result normal?

YES>>

GO TO 5.

NO>>

Check harness for open or short between brake pedal position switch and fuse.

CHECK BRAKE PEDAL POSITION SWITCH SIGNAL CIRCUIT

1. Ignition switch OFF.

2. Check continuity between brake pedal position switch harness connector and BCM harness connector.

   Brake pedal position switch		BCM		Continuity
   Connector	Terminal	Connector	Terminal
   E76	2	M80	111	Yes

3. Check continuity between brake pedal position switch harness connector and ground.

   Brake pedal position switch		(–)	Continuity
   Connector	Terminal
   E76	2	Ground	No

Is the inspection result normal?

YES>>

GO TO 6.

NO>>

Repair or replace harness.

CHECK BRAKE PEDAL POSITION SWITCH

Refer to Component Inspection.

Is the inspection result normal?

YES>>

Inspection End.

NO>>

Replace brake pedal position switch. Refer to Exploded View.

CHECK FUSE

Check that the following fuse is not blown (open).

Signal name	Fuse No.	Capacity
Battery power supply	21	10 A

Is the fuse blown (open)?

YES>>

Replace the blown (open) fuse after replacing the cause of blown (open).

NO>>

GO TO 8.

CHECK STOP LAMP SWITCH SIGNAL

1. Ignition switch OFF.

2. Disconnect BCM connector.

3. Check voltage between BCM harness connector and ground.

   (+)		(–)	Condition	Voltage (Approx.)
   BCM
   Connector	Terminal
   M80	110	Ground	Brake pedal position switch 2 ON (brake pedal is depressed)	Battery voltage
   			Brake pedal position switch 2 OFF (brake pedal is not depressed)	0 V

Is the inspection normal?

YES>>

Inspection End.

NO>>

GO TO 9.

CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT

1. Disconnect stop lamp switch connector.

2. Check voltage between stop lamp switch harness connector and ground.

   (+)		(–)	Voltage (Approx.)
   Stop lamp switch
   Connector	Terminal
   E38	1	Ground	Battery voltage

Is the inspection result normal?

YES>>

GO TO 10.

NO>>

Check harness for open or short between stop lamp switch and fuse.

CHECK STOP LAMP SWITCH SIGNAL CIRCUIT

1. Check continuity between stop lamp switch harness connector and BCM harness connector.

   Stop lamp switch		BCM		Continuity
   Connector	Terminal	Connector	Terminal
   E38	2	M80	110	Yes

2. Check continuity between stop lamp switch harness connector and ground.

   Stop lamp switch		(–)	Continuity
   Connector	Terminal
   E38	2	Ground	No

Is the inspection result normal?

YES>>

GO TO 6.

NO>>

Repair or replace harness.

B2f71-23 Stop Lamp Nissan Pathfinder

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen items (Trouble diagnosis content)	DTC detecting condition
B2F71-23	Stop lamp (Stop lamp)	Diagnosis condition	When brake pedal is depressed
		Signal (terminal)	Stop lamp switch 1 signal
		Threshold	When stop lamp switch 1 signal is not input when brake pedal depressed.
		Diagnosis delay time	10 times or more

POSSIBLE CAUSE

• Harness or connectors

  (Stop lamp switch circuit is short to battery)

• Stop lamp switch

• Fuse

• BCM

FAIL-SAFE

—

CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

CONSULT

1. Depress brake pedal 10 times or more.

2. Ignition switch ON.

3. Check DTC in “Self Diagnostic Result” mode of “BCM”.

Is DTC detected?

YES>>

Refer to DTC Diagnosis Procedure.

NO>>

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

NO>>

Confirmation after repair: Inspection End.

DTC Diagnosis Procedure

CHECK FUSE

Check that the following fuse is not blown (open).

Signal name	Fuse No.	Capacity
Battery power supply	32	10 A

Is the fuse blown (open)?

YES>>

Replace the blown (open) fuse after replacing the cause of blown (open).

NO>>

GO TO 2.

CHECK BRAKE PEDAL POSITION SWITCH SIGNAL

1. Ignition switch OFF.

2. Disconnect BCM connector.

3. Ignition switch ON.

4. Check voltage between BCM harness connector and ground.

   (+)		(–)	Condition	Voltage (Approx.)
   BCM
   Connector	Terminal
   M80	111	Ground	Brake pedal position switch 1 ON (brake pedal is not depressed)	Battery voltage
   			Brake pedal position switch 1 OFF (brake pedal is depressed)	0 V

Is the inspection normal?

YES>>

Replace BCM. Refer to Removal and Installation.

NO>>

GO TO 3.

CHECK BRAKE PEDAL POSITION SWITCH POWER SUPPLY CIRCUIT

1. Ignition switch OFF.

2. Disconnect brake pedal position switch connector.

3. Ignition switch ON.

4. Check voltage between brake pedal position switch harness connector and ground.

   (+)		(–)	Voltage (Approx.)
   Brake pedal position switch
   Connector	Terminal
   E76	1	Ground	Battery voltage

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Check harness for open or short between brake pedal position switch and fuse.

CHECK BRAKE PEDAL POSITION SWITCH SIGNAL CIRCUIT

1. Ignition switch OFF.

2. Check continuity between brake pedal position switch harness connector and BCM harness connector.

   Brake pedal position switch		BCM		Continuity
   Connector	Terminal	Connector	Terminal
   E76	2	M80	111	Yes

3. Check continuity between brake pedal position switch harness connector and ground.

   Brake pedal position switch		—	Continuity
   Connector	Terminal
   E76	2	Ground	No

Is the inspection result normal?

YES>>

GO TO 5.

NO>>

Repair or replace harness.

CHECK BRAKE PEDAL POSITION SWITCH

Refer to Component Inspection.

Is the inspection result normal?

YES>>

Replace BCM. Refer to Removal and Installation.

NO>>

Replace brake pedal position switch. Refer to Exploded View.

B2f72-23 Stop Lamp Nissan Pathfinder Fifth generation

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen items (Trouble diagnosis content)	DTC detecting condition
B2F72-23	Stop lamp (Stop lamp)	Diagnosis condition	Ignition switch ON
		Signal (terminal)	Stop lamp switch 2 signal
		Threshold	When stop lamp switch 2 signal is input even though the brake pedal is not depressed 10 consecutive times.
		Diagnosis delay time	Depress brake pedal 10 times

POSSIBLE CAUSE

• Harness or connectors

  (Stop lamp switch circuit is open or shorted)

• Stop lamp switch

• Fuse

• BCM

FAIL-SAFE

—

CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

CONSULT

1. Depress brake pedal 10 times.

2. Ignition switch ON.

3. Check DTC in “Self Diagnostic Result” mode of “BCM”.

Is DTC detected?

YES>>

Refer to DTC Diagnosis Procedure.

NO>>

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

NO>>

Confirmation after repair: Inspection End.

DTC Diagnosis Procedure

CHECK FUSE

Check that the following fuse is not blown (open).

Signal name	Fuse No.	Capacity
Battery power supply	21	10 A

Is the fuse blown (open)?

YES>>

Replace the blown (open) fuse after replacing the cause of blown (open).

NO>>

GO TO 2.

CHECK STOP LAMP SWITCH SIGNAL

1. Ignition switch OFF.

2. Disconnect BCM connector.

3. Check voltage between BCM harness connector and ground.

   (+)		(–)	Condition	Voltage (Approx.)
   BCM
   Connector	Terminal
   M80	110	Ground	Stop lamp switch 2 ON (brake pedal is depressed)	Battery voltage
   			Stop lamp switch 2 OFF (brake pedal is not depressed)	0 V

Is the inspection normal?

YES>>

Replace BCM. Refer to Removal and Installation.

NO>>

GO TO 3.

CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT

1. Disconnect stop lamp switch connector.

2. Check voltage between stop lamp switch harness connector and ground.

   (+)		(–)	Voltage (Approx.)
   Stop lamp switch
   Connector	Terminal
   E38	1	Ground	Battery voltage

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Check harness for open or short between stop lamp switch and fuse.

CHECK STOP LAMP SWITCH SIGNAL CIRCUIT

1. Check continuity between stop lamp switch harness connector and BCM harness connector.

   Stop lamp switch		BCM		Continuity
   Connector	Terminal	Connector	Terminal
   E38	2	M80	110	Yes

2. Check continuity between stop lamp switch harness connector and ground.

   Stop lamp switch		—	Continuity
   Connector	Terminal
   E38	2	Ground	No

Is the inspection result normal?

YES>>

GO TO 5.

NO>>

Repair or replace harness.

CHECK STOP LAMP SWITCH

Refer to Component Inspection.

Is the inspection result normal?

YES>>

Replace BCM. Refer to Removal and Installation.

NO>>

Replace stop lamp switch. Refer to Exploded View.

B2080 Power Switch Nissan Pathfinder 2025

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen terms (Trouble diagnosis content)	DTC Detection Condition
B2080-01	Power switch (Power switch)	Diagnosis condition	When the ignition switch is ON.
		Signal (terminal)	—
		Threshold	Intelligent Key unit detects the push-button ignition switch stuck at ON for 100 seconds or more
		Diagnosis delay time	100 seconds
B2080-1C	Power switch (Power switch)	Diagnosis condition	When the ignition switch is ON.
		Signal (terminal)	—
		Threshold	Intelligent Key unit detects the push-button ignition switch stuck at ON for 100 seconds or more
		Diagnosis delay time	100 seconds
B2080-12	Power switch (Power switch)	Diagnosis condition	When the ignition switch is ON.
		Signal (terminal)	—
		Threshold	Intelligent Key unit detects the push-button ignition switch stuck at ON for 100 seconds or more
		Diagnosis delay time	100 seconds
B2080-14	Power switch (Power switch)	Diagnosis condition	When the ignition switch is ON.
		Signal (terminal)	—
		Threshold	Intelligent Key unit detects the push-button ignition switch stuck at ON for 100 seconds or more
		Diagnosis delay time	100 seconds

POSSIBLE CAUSE

• Harness or connectors

  (Push-button ignition switch circuit is shorted.)

• Push-button ignition switch

• Intelligent Key unit

FAIL-SAFE

—

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

CONSULT

1. Press push-button ignition switch under the following condition:

   • Brake pedal: Not depressed

2. Release push-button ignition switch and wait 100 seconds or more.

3. Select “Self Diagnostic Result” mode of “INTELLIGENT KEY”.

Is DTC detected?

YES>>

Refer to DTC Diagnosis Procedure.

NO>>

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

NO>>

Confirmation after repair: Inspection End.

DTC Diagnosis Procedure

CHECK PUSH-BUTTON IGNITION SWITCH INPUT SIGNAL

1. Ignition switch OFF.

2. Disconnect push-button ignition switch connector.

3. Check voltage between push-button ignition switch harness connector and ground.

   (+)		(–)	Voltage (Approx.)
   Push-button ignition switch
   Connector	Terminal
   M17	8	Ground	Battery voltage

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

GO TO 2.

CHECK PUSH-BUTTON IGNITION SWITCH CIRCUIT

1. Disconnect Intelligent Key unit connector.

2. Check continuity between push-button ignition switch harness connector and Intelligent Key unit harness connector.

   Push-button ignition switch		Intelligent Key unit		Continuity
   Connector	Terminal	Connector	Terminal
   M17	8	M38	9	Yes

3. Check continuity between push-button ignition switch harness connector and ground.

   Push-button ignition switch		(–)	Continuity
   Connector	Terminal
   M17	8	Ground	No

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair or replace harness.

REPLACE INTELLIGENT KEY UNIT

Replace Intelligent Key unit. Refer to Removal and Installation.

>>

Inspection End.

CHECK PUSH-BUTTON IGNITION SWITCH GROUND CIRCUIT

Check continuity between push-button ignition switch harness connector and ground.

Push-button ignition switch		(–)	Continuity
Connector	Terminal
M17	4	Ground	Yes

Is the inspection result normal?

YES>>

GO TO 5.

NO>>

Repair or replace harness.

CHECK PUSH-BUTTON IGNITION SWITCH

Refer to Component Inspection.

Is the inspection result normal?

YES>>

GO TO 6.

NO>>

Replace push-button ignition switch. Refer to Removal and Installation.

CHECK INTERMITTENT INCIDENT

Refer to Intermittent Incident.

>>

Inspection End.

Component Inspection

CHECK PUSH-BUTTON IGNITION SWITCH

1. Ignition switch OFF.

2. Disconnect push-button ignition switch connector.

3. Check continuity between push-button ignition switch terminals.

   Push-button ignition switch		Condition		Continuity
   Terminals
   4	8	Push-button ignition switch	Pressed	Yes
   			Not pressed	No

Is the inspection result normal?

YES>>

Inspection End.

NO>>

Replace push-button ignition switch. Refer to Removal and Installation.

B2033-4a Dongle Ng Nissan Pathfinder 2022

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen items (Trouble diagnosis content)	DTC detection condition
B2033–4A	DONGLE NG (Dongle not good)	Diagnosis condition	Ignition switch ON
		Signal (terminal)	CAN communication signal
		Threshold	The ID verification results NG
		Diagnosis delay time	1 second or more

POSSIBLE CAUSE

• Harness or connector

  (The CAN communication line is open or shorted)

• Intelligent Key unit

• EPS control unit

FAIL-SAFE

—

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

CONSULT

1. Ignition switch ON.

2. Select “Self Diagnostic Result” mode of “HANDS FREE MODULE”.

Is DTC detected?

YES>>

Refer to DTC Diagnosis Procedure.

NO>>

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

NO>>

Confirmation after repair: Inspection End.

DTC Diagnosis Procedure

PERFORM INITIALIZATION

CONSULT

1. Perform initialization of Intelligent Key unit and registration of all Intelligent Keys.

   For initialization and registration procedures, refer to CONSULT immobilizer mode and follow the on-screen instructions.

2. Check that the Nissan Pathfinder vehicle can be set to READY using registered Intelligent Key.

Is the inspection result normal?

YES>>

Inspection End.

NO>>

GO TO 2.

REPLACE INTELLIGENT KEY UNIT

Replace Intelligent Key unit. Refer to Removal and Installation.

Is the DTC detected?

YES>>

GO TO 3.

NO>>

Inspection End.

REPLACE EPS CONTROL UNIT

Replace EPS control unit. Refer to Removal and Installation.

>>

Inspection End.

B2042-4a Electric Shift Authentication Fail Nissan Pathfinder

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen items (Trouble diagnosis content)	DTC detecting condition
B2042–4A	Electric shift authentication fail (Electric shift authentication fail)	Diagnosis condition	When ignition switch is placed from OFF to ON
		Signal (terminal)	CAN communication signal
		Threshold	When Intelligent Key unit cannot detect CAN communication with electric shift control module
		Diagnosis delay time	1 second or less

POSSIBLE CAUSE

• Harness or connectors

  (The CAN communication line is open or shorted)

• Electric shift control module

FAIL-SAFE

Prohibit shifting the shift selector from P position

CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

CONSULT

1. Ignition switch ON.

2. Check DTC in “Self Diagnostic Result” mode of “HANDS FREE MODULE”.

Is DTC detected?

YES>>

Refer to DTC Diagnosis Procedure.

NO>>

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

NO>>

Confirmation after repair: Inspection End.

DTC Diagnosis Procedure

CHECK DTC PRIORITY OF INTELLIGENT KEY UNIT

CONSULT

1. Select “Self Diagnostic Result” mode of “HANDS FREE MODULE”.

2. If DTC B2042–4A is displayed with two or more DTCs are detected, refer to DTC inspection priority chart, and determine trouble diagnosis.

Is applicable DTC detected?

YES>>

Perform the trouble diagnosis related to the detected DTC. Refer to DTC Index.

NO>>

GO TO 2.

CHECK DTC PRIORITY OF ELECTRIC SHIFT CONTROL MODULE

CONSULT

Select “Self Diagnostic Result” mode of “SHIFT”.

Is the DTC detected?

YES>>

Perform the trouble diagnosis related to the detected DTC. Refer to DTC Index.

NO>>

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

B2043-4a Electric Shift Id Discord Nissan Pathfinder Fifth generation

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen items (Trouble diagnosis content)	DTC detecting condition
B2043–4A	Electric shift ID discord (Electric shift identification discord)	Diagnosis condition	When registering electric shift control module
		Signal (terminal)	CAN communication signal
		Threshold	Electric shift control module registration has not been completed normally
		Diagnosis delay time	1 second or less

POSSIBLE CAUSE

Improper electric shift control module registration operation

FAIL-SAFE

Prohibit shifting the shift selector from P position

CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

CONSULT

1. Ignition switch ON.

2. Check DTC in “Self Diagnostic Result” mode of “HANDS FREE MODULE”.

Is DTC detected?

YES>>

Refer to DTC Diagnosis Procedure.

NO>>

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

NO>>

Confirmation after repair: Inspection End.

DTC Diagnosis Procedure

REPLACE ELECTRIC SHIFT CONTROL MODULE

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

>>

Inspection End.

B2070-68 Key Registration Nissan Pathfinder SUV

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen items (Trouble diagnosis content)	DTC detecting condition
B2070–68	Key registration (Key registration)	Diagnosis condition	All time
		Signal (terminal)	—
		Threshold	Intelligent Key that does not match the Nissan Pathfinder vehicle is registered.
		Diagnosis delay time	1 second or less

POSSIBLE CAUSE

• Improper registration operation

• Intelligent Key

• Intelligent Key unit

FAIL-SAFE

—

CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

CONSULT

1. Perform initialization of Intelligent Key unit and registration of all Intelligent Keys.

2. Select “Self Diagnostic Result” mode of “HANDS FREE MODULE”.

Is the DTC detected?

YES>>

Refer to DTC Diagnosis Procedure.

NO>>

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

NO>>

Confirmation after repair: Inspection End.

DTC Diagnosis Procedure

REPLACE INTELLIGENT KEY

CONSULT

1. Replace Intelligent Key that matches the Nissan Pathfinder vehicle.

2. Perform initialization of Intelligent Key unit and registration of Intelligent Key.

Is the inspection result normal?

YES>>

Inspection End.

NO>>

GO TO 2.

REPLACE INTELLIGENT KEY UNIT

Replace Intelligent Key unit. Refer to Removal and Installation.

>>

Inspection End.

B2090-14 Nats Antenna Amp. Nissan Pathfinder 2025

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen items (Trouble diagnosis content)	DTC detecting condition
B2090–14	NATS antenna amp. (Nissan anti-theft system antenna amplifier)	Diagnosis condition	Work support ‟INSIDE/OUTSIDE ANT DIAGNOSIS”: activated
		Signal (terminal)	NATS antenna amp. signal
		Threshold	Inactive communication between NATS antenna amp. and Intelligent Key unit
		Diagnosis delay time	1 second or less

POSSIBLE CAUSE

• Harness or connectors

  (NATS antenna amp. circuit is open or shorted.)

• Push-button ignition switch (NATS antenna amp.)

• Intelligent Key unit

FAIL-SAFE

—

CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

CONSULT

1. Select “INSIDE/OUTSIDE ANT DIAGNOSIS” in “WORK SUPPORT” mode of “HANDS FREE MODULE”.

2. Select “Self Diagnostic Result” mode of “HANDS FREE MODULE”.

Is the DTC detected?

YES>>

Refer to DTC Diagnosis Procedure.

NO>>

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

NO>>

Confirmation after repair: Inspection End.

DTC Diagnosis Procedure

CHECK NATS ANTENNA AMP. COMMUNICATION SIGNAL

Check signal between push-button ignition switch harness connector and ground using an oscilloscope.

(+)		(–)	Condition		Signal (Reference value)
Push-button ignition switch
Connector	Terminal
M17	2	Ground	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
				Other than above
	3			When a registered Intelligent Key backside is contacted to push-button ignition switch	0 V
				Other than above

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

GO TO 2.

CHECK NATS ANTENNA AMP. COMMUNICATION SIGNAL CIRCUIT

1. Ignition switch OFF.

2. Disconnect Intelligent Key unit connector and push-button ignition switch connector.

3. Check continuity between push-button ignition switch harness connector and Intelligent Key unit harness connector.

   Push-button ignition switch		Intelligent Key unit		Continuity
   Connector	Terminal	Connector	Terminal
   M17	2	M38	19	Yes
   	3		20

4. Check continuity between push-button ignition switch harness connector and ground.

   Push-button ignition switch		(-)	Continuity
   Connector	Terminal
   M17	2	Ground	No
   	3

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair or replace harness.

REPLACE PUSH-BUTTON IGNITION SWITCH

Replace push-button ignition switch. Refer to Removal and Installation.

Is the inspection result normal?

YES>>

Inspection End.

NO>>

GO TO 4.

REPLACE INTELLIGENT KEY UNIT

Replace Intelligent Key unit. Refer to Removal and Installation.

>>

Inspection End.

Hood Switch Nissan Pathfinder Fifth generation

Component Function Check

CHECK FUNCTION

CONSULT

1. Select “HOOD SW (CAN)” or “Hood switch” in “Data Monitor” mode of “IPDM E/R”.

2. Check “HOOD SW (CAN)” or “Hood switch” indication under the following condition.

Monitor item	Condition	Indication
HOOD SW (CAN)	Close the hood	Close
	Open the hood	Open
	Transmits invalid CAN signal	NG
Hood switch	Close the hood	Close
	Open the hood	Open

Is the indication normal?

YES>>

Hood switch is OK.

NO>>

Refer to Diagnosis Procedure.

Diagnosis Procedure

CHECK HOOD SWITCH SIGNAL CIRCUIT 1

1. Ignition switch OFF.

2. Disconnect hood switch connector.

3. Check voltage between hood switch harness connector and ground.

(+)		(–)	Voltage (Approx.)
Hood switch
Connector	Terminal
E234	1	Ground	Battery voltage

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

GO TO 2.

CHECK HOOD SWITCH SIGNAL CIRCUIT 2

1. Disconnect IPDM E/R connector.

2. Check continuity between IPDM E/R harness connector and hood switch harness connector.

   IPDM E/R		Hood switch		Continuity
   Connector	Terminal	Connector	Terminal
   E217	52	E234	1	Yes

3. Check continuity between IPDM E/R harness connector and ground.

   IPDM E/R		—	Continuity
   Connector	Terminal
   E217	52	Ground	No

Is the inspection result normal?

YES>>

Replace IPDM E/R. Refer to Removal and Installation.

NO>>

Repair or replace harness.

CHECK HOOD SWITCH GROUND CIRCUIT

Check continuity between hood switch harness connector and ground.

Hood switch		—	Continuity
Connector	Terminal
E234	2	Ground	Yes

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Repair or replace harness.

CHECK HOOD SWITCH

Refer to Component Inspection.

Is the inspection result normal?

YES>>

GO TO 5.

NO>>

Replace hood lock assembly. Refer to Removal and Installation.

CHECK INTERMITTENT INCIDENT

Refer to Intermittent Incident.

>>

Inspection End.

Component Inspection

CHECK HOOD SWITCH

1. Ignition switch OFF.

2. Disconnect hood switch connector.

3. Check continuity between hood switch terminals.

   Hood switch		Condition		Continuity
   Terminal
   1	2	Hood lock	Unlock condition	No
   			Lock condition	Yes

Is the inspection result normal?

YES>>

Inspection End.

NO>>

Replace hood lock assembly. Refer to Removal and Installation.

Horn Function Nissan Pathfinder SUV

Component Function Check

CHECK FUNCTION

CONSULT

1. Ignition switch OFF.

2. Perform “HORN” in “ACTIVE TEST” mode of “IPDM E/R”.

3. Check the horn operation.

   Test item		Description
   HORN	On	Horn	Sounds (for 20 ms.)

Is the operation normal?

YES>>

Inspection End.

NO>>

Refer to Diagnosis Procedure (Horn (Low)) or Diagnosis Procedure (Horn (High)).

Diagnosis Procedure (Horn (Low))

CHECK HORN FUNCTION

Check horn function with horn switch.

Do horns sound?

YES>>

GO TO 2.

NO>>

Perform the trouble diagnosis for horn circuit. Refer to Wiring Diagram.

CHECK HORN RELAY CONTROL SIGNAL

CONSULT

1. Ignition switch ON.

2. Select "HORN" in "ACTIVE TEST" mode of "IPDM E/R".

3. Check voltage between IPDM E/R harness connector and ground.

(+)		(–)	Test item		Voltage (Approx.)
IPDM E/R
Connector	Terminal
E119	9	Ground	HORN	On	0 V
				Off	Battery voltage

Is operation normal?

YES>>

GO TO 4.

NO>>

GO TO 3.

CHECK IPDM E/R POWER SUPPLY CIRCUIT

1. Ignition switch OFF.

2. Disconnect horn relay-2 connector and IPDM E/R connector.

3. Check continuity between IPDM E/R harness connector and horn relay-2 harness connector.

   IPDM E/R		Horn relay-2		Continuity
   Connector	Terminal	Connector	Terminal
   E119	9	E58	1	Yes

4. Check continuity between IPDM E/R harness connector and ground.

   IPDM E/R		(–)	Continuity
   Connector	Terminal
   E119	9	Ground	No

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Repair or replace harness.

CHECK INTERMITTENT INCIDENT

Refer to Intermittent Incident.

>>

Inspection End.

Diagnosis Procedure (Horn (High))

CHECK HORN FUNCTION

Check horn function with horn switch.

Do horns sound?

YES>>

GO TO 2.

NO>>

Perform the trouble diagnosis for horn circuit. Refer to Wiring Diagram.

CHECK HORN RELAY CONTROL SIGNAL

CONSULT

1. Ignition switch ON.

2. Select "HORN" in "ACTIVE TEST" mode of "IPDM E/R".

3. Check voltage between IPDM E/R harness connector and ground.

(+)		(–)	Test item		Voltage (Approx.)
IPDM E/R
Connector	Terminal
E119	9	Ground	HORN	On	0 V
				Off	Battery voltage

Is operation normal?

YES>>

GO TO 4.

NO>>

GO TO 3.

CHECK IPDM E/R POWER SUPPLY CIRCUIT

1. Ignition switch OFF.

2. Disconnect horn relay-1 connector and IPDM E/R connector.

3. Check continuity between IPDM E/R harness connector and horn relay-1 harness connector.

   IPDM E/R		Horn relay-1		Continuity
   Connector	Terminal	Connector	Terminal
   E119	9	H-1	1	Yes

4. Check continuity between IPDM E/R harness connector and ground.

   IPDM E/R		(–)	Continuity
   Connector	Terminal
   E119	9	Ground	No

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Repair or replace harness.

CHECK INTERMITTENT INCIDENT

Refer to Intermittent Incident.

>>

Inspection End.

Starter Cut Relay Nissan Pathfinder Fifth generation

Component Inspection

CHECK STARTER CUT RELAY

1. Ignition switch OFF.

2. Disconnect starter cut relay.

3. Check continuity between starter cut relay terminals.

   Starter cut relay		Condition	Continuity
   Terminal
   8	7	12 V direct current supply between terminals 5 and 6	Yes
   		No current supply	No

Is the inspection result normal?

YES>>

Inspection End.

NO>>

Replace starter cut relay.

Stop Lamp Switch Nissan Pathfinder Fifth generation

Component Inspection

CHECK STOP LAMP SWITCH

1. Ignition switch OFF.

2. Disconnect stop lamp switch connector.

3. Check continuity between stop lamp switch terminals.

   Stop lamp switch		Condition		Continuity
   Terminal
   1	2	Brake pedal	Not depressed	No
   			Depressed	Yes

Is the inspection result normal?

YES>>

Inspection End.

NO>>

Replace stop lamp switch. Refer to Exploded View.

Brake Pedal Position Switch Nissan Pathfinder R53

Component Inspection

CHECK BRAKE PEDAL POSITION SWITCH

1. Ignition switch OFF.

2. Disconnect stop lamp switch connector.

3. Check continuity between brake pedal position switch terminals.

   Brake pedal position switch		Condition		Continuity
   Terminal
   1	2	Brake pedal	Not depressed	No
   			Depressed	Yes

Is the inspection result normal?

YES>>

Inspection End.

NO>>

Replace brake pedal position switch. Refer to Exploded View.