Nissan Pathfinder: Audio, Visual & Navigation System - Dtc/circuit Diagnosis

• B2e01 Internal Battery
• B2e04 Internal Battery
• B2e05 Air Bag Can
• B2e08 Microphone
• B2e0b Sos Led (auto)
• B2e0f Gps Antenna
• B2e12 Configuration
• B2e1b Automatic Ecall
• B2e32 Audio Unit
• B2e34 Tel Antenna
• B2e4f Bcm Pairing
• U0074 Av Communication
• U0079 Can Communication
• Power Supply and Ground Circuit

B2e01 Internal Battery Nissan Pathfinder SUV

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
B2E01-16	Internal battery (Internal battery)	Diagnosis condition	When ignition switch is ON
		Signal (terminal)	Internal battery remaining
		Threshold	25% or less
		Diagnosis delay time	1 second or more
B2E01-4A		Diagnosis condition	When ignition switch is ON
		Signal (terminal)	Internal battery power supply
		Threshold	Internal battery degradation
		Diagnosis delay time	1 second or more
B2E01-4B		Diagnosis condition	When ignition switch is ON
		Signal (terminal)	Internal battery temperature
		Threshold	100 °C (212 °F) or more
		Diagnosis delay time	1 second or more
B2E01-96		Diagnosis condition	When ignition switch is ON
		Signal (terminal)	Internal battery
		Threshold	Internal battery abnormality
		Diagnosis delay time	1 second or more

POSSIBLE CAUSE

• 16: Internal battery discharged

• 4A: Internal battery power supply approaching its end of life

• 4B: Internal battery temperature sensed above 100 °C (212 °F)

• 96:

  • Internal battery disconnected

  • Internal battery abnormality

  • Internal battery connector error

FAIL-SAFE

Telematics system does not operate

Confirmation Procedure

PERFORM DTC CONFIRMATION PROCEDURE

CONSULT

1. Ignition switch ON.

2. Ignition switch OFF and wait at least 30 seconds.

3. Ignition switch ON and wait at least 30 seconds or more.

4. Select “Self Diagnostic Result” mode of “IVC”.

5. Check DTC.

Is DTC B2E01 detected?

YES>>

Proceed to DTC Diagnosis Procedure.

NO>>

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

NO>>

Confirmation after repair: Inspection End.

DTC Diagnosis Procedure

DETERMINE MALFUNCTION TYPE

CONSULT

1. Ignition switch ON.

2. Ignition switch OFF and wait at least 30 seconds.

3. Ignition switch ON and wait at least 30 seconds or more.

4. Select “Self Diagnostic Result” mode of “IVC”.

5. Check DTC.

Is DTC B2E01–16, 4A, 4B or 96 detected?

YES>>

16 – GO TO 2.

YES>>

4A – GO TO 7.

YES>>

4B – GO TO 3.

YES>>

96 – GO TO 4.

NO>>

Refer to Intermittent Incident.

INTERNAL BATTERY CHARGING

Ignition switch ON or engine idling more than one hour for internal battery charging of TCU.

YES>>

GO TO 7.

DECREASE TCU TEMPERATURE

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

2. Ignition switch OFF and wait until the temperature around TCU cools down.

YES>>

GO TO 7.

CHECK DTC STATUS

Check if DTC B2E01–96 is “CRNT” or “PAST”.

Is DTC B2E01–96 “CRNT”?

YES>>

GO TO 5.

NO>>

GO TO 7.

PERFORM WORK SUPPORT

CONSULT

Perform “TCU Backup Battery Reset” in “Work support”.

YES>>

GO TO 6.

PERFORM SELF DIAGNOSTIC RESULT

CONSULT

1. Ignition switch ON.

2. Ignition switch OFF and wait at least 30 seconds.

3. Ignition switch ON and wait at least 30 seconds or more.

4. Select “Self Diagnostic Result” mode of “IVC”.

5. Check DTC.

Is DTC B2E01–96 CRNT detected again?

YES>>

GO TO 7.

NO>>

Inspection End.

PERFORM CONFIRMATION PROCEDURE AGAIN

CONSULT

1. Ignition switch ON.

2. Erase DTC.

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

Is DTC B2E01–16, 4A, 4B or 96 detected again?

YES>>

Replace TCU. Refer to Removal and Installation.

NO>>

Inspection End.

B2e04 Internal Battery Nissan Pathfinder 2022

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
B2E04-16	Internal battery (Internal battery)	Diagnosis condition	When ignition switch is ON
		Signal (terminal)	Internal battery remaining
		Threshold	25% or less
		Diagnosis delay time	1 second or more

POSSIBLE CAUSE

Internal battery discharged

FAIL-SAFE

Telematics system does not operate

Confirmation Procedure

PERFORM DTC CONFIRMATION PROCEDURE

CONSULT

1. Ignition switch ON.

2. Ignition switch OFF and wait at least 30 seconds.

3. Ignition switch ON and wait at least 30 seconds or more.

4. Select “Self Diagnostic Result” mode of “IVC”.

5. Check DTC.

Is DTC B2E04–16 detected?

YES>>

Proceed to DTC Diagnosis Procedure.

NO>>

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

NO>>

Confirmation after repair: Inspection End.

DTC Diagnosis Procedure

INTERNAL BATTERY CHARGING

Ignition switch ON or engine idling more than one hour for internal battery charging of TCU.

YES>>

GO TO 2.

PERFORM CONFIRMATION PROCEDURE AGAIN

CONSULT

1. Ignition switch ON.

2. Erase DTC.

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

Is DTC B2E04–16 detected again?

YES>>

Replace TCU. Refer to Removal and Installation.

NO>>

Inspection End.

B2e05 Air Bag Can Nissan Pathfinder R53

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
B2E05-29	Air Bag (Air Bag CAN)	Diagnosis condition	When ignition switch is ON
		Signal (terminal)	CAN communication signal
		Threshold	Transmission or reception error
		Diagnosis delay time	2 seconds or more

POSSIBLE CAUSE

CAN communication system

FAIL-SAFE

Telematics system does not operate

Confirmation Procedure

PERFORM DTC CONFIRMATION PROCEDURE

CONSULT

1. Ignition switch ON.

2. Ignition switch OFF and wait at least 30 seconds.

3. Ignition switch ON and wait at least 30 seconds or more.

4. Select “Self Diagnostic Result” mode of “IVC”.

5. Check DTC.

Is DTC B2E05–29 detected?

YES>>

Proceed 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 CAN COMMUNICATION TROUBLE DIAGNOSIS

Perform the trouble diagnosis for CAN communication system. Refer to Trouble Diagnosis Flow Chart.

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Repair or replace harness or connector.

CHECK THE AIR BAG DIAGNOSIS SENSOR UNIT

CONSULT

1. Ignition switch ON.

2. Select “Self Diagnostic Result” mode of “AIR BAG”.

3. Check DTC.

Is any DTC detected?

YES>>

Perform diagnosis on the detected DTC. Refer to DTC Index.

NO>>

GO TO 3.

PERFORM CONFIRMATION PROCEDURE AGAIN

CONSULT

1. Ignition switch ON.

2. Erase DTC.

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

Is DTC B2E05–29 detected again?

YES>>

Replace TCU. Refer to Removal and Installation.

NO>>

Inspection End.

B2e08 Microphone Nissan Pathfinder

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
B2E08–01	Microphone (Microphone)	1	Diagnosis condition	When ignition switch is ON.
			Signal (terminal)	Microphone signal
			Threshold	7.2 V or more
			Diagnosis delay time	1 second or more
		2	Diagnosis condition	When ignition switch is ON.
			Signal (terminal)	Microphone signal
			Threshold	0.2 V or less
			Diagnosis delay time	1 second or more

POSSIBLE CAUSE

• Microphone signal circuit short to power supply

• Microphone signal circuit short to ground

• Microphone

FAIL-SAFE

Microphone does not operate

Confirmation Procedure

PERFORM DTC CONFIRMATION PROCEDURE

CONSULT

1. Ignition switch ON.

2. Ignition switch OFF and wait at least 30 seconds.

3. Ignition switch ON and wait at least 30 seconds or more.

4. Select “Self Diagnostic Result” mode of “IVC”.

5. Check DTC.

Is DTC B2E08–01 detected?

YES>>

Proceed 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 MICROPHONE SIGNAL CIRCUIT AND MICROPHONE VCC CIRCUIT CONTINUITY

1. Ignition switch OFF.

2. Disconnect TCU connector and microphone connector.

3. Check continuity between TCU connector and microphone connector.

   TCU		Microphone		Continuity
   Connector	Terminal	Connector	Terminal
   M188	17	R109	8	Yes
   	18		3

4. Check the continuity between TCU connector and ground.

   TCU		Ground	Continuity
   Connector	Terminal
   M188	17		No
   	18

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Repair or replace harness or connectors.

CHECK MICROPHONE VCC VOLTAGE

1. Connect TCU connector and microphone connector.

2. Ignition switch ON.

3. Check voltage between TCU connector and ground.

   (+)		(−)	Voltage (Approx.)
   TCU
   Connector	Terminal
   M188	18	Ground	4.72 V

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Replace TCU. Refer to Removal and Installation.

CHECK MICROPHONE SIGNAL

Check signal between TCU connector and ground.

(+)		(−)	Condition	Reference value
TCU
Connector	Terminal
M188	17	Ground	Speak into microphone.

Is the inspection result normal?

YES>>

Replace TCU. Refer to Removal and Installation.

NO>>

Replace microphone. Refer to Removal and Installation.

B2e0b Sos Led (auto) Nissan Pathfinder SUV

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
B2E0B-01	SOS LED (Auto) [SOS LED (Auto)]	1	Diagnosis condition	When ignition switch is ON
			Signal (terminal)	SOS switch LED (Green) signal (terminal 5)
			Threshold	Not connected or open circuit
			Diagnosis delay time	1 second or more
		2	Diagnosis condition	When ignition switch is ON
			Signal (terminal)	SOS switch LED (Green) signal (terminal 5)
			Threshold	1.2 V or less
			Diagnosis delay time	1 second or more
		3	Diagnosis condition	When ignition switch is ON
			Signal (terminal)	SOS switch LED (Green) signal (terminal 5)
			Threshold	5.8 V or more
			Diagnosis delay time	1 second or more

POSSIBLE CAUSE

• Telematics switch is not connected,

• SOS switch LED (Green) signal is open

• SOS switch LED (Green) signal is short to ground

• SOS switch LED (Green) signal is short to battery

FAIL-SAFE

Telematics system does not operate

Confirmation Procedure

PERFORM DTC CONFIRMATION PROCEDURE

CONSULT

1. Ignition switch ON.

2. Ignition switch OFF and wait at least 30 seconds.

3. Ignition switch ON and wait at least 30 seconds or more.

4. Select “Self Diagnostic Result” mode of “IVC”.

5. Check DTC.

Is DTC B2E0B–01 detected?

YES>>

Proceed 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 SOS SWITCH LED (GREEN) SIGNAL

1. Ignition switch ON.

2. Check the voltage between TCU connector and ground.

   (+)		(-)	Condition	Voltage (Approx.)
   TCU
   Connector	Terminal
   M188	5	Ground	SOS switch LED (Green) not illuminated	4.0 V
   			SOS switch LED (Green) illuminated	0 V

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Replace TCU. Refer to Removal and Installation.

CHECK SOS SWITCH LED (GREEN) SIGNAL CIRCUIT FOR OPEN

1. Ignition switch OFF.

2. Disconnect TCU connector and telematics switch connector.

3. Check the continuity between TCU connector and telematics switch connector.

   TCU		Telematics switch		Continuity
   Connector	Terminal	Connector	Terminal
   M188	5	R115 (without moonroof) R108 (with moonroof)	5	Yes

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair or replace harness or connector.

CHECK SOS SWITCH LED (GREEN) SIGNAL CIRCUIT FOR SHORT

1. Ignition switch ON.

2. Check the voltage between TCU connector and ground.

   (+)		(-)	Voltage (Approx.)
   TCU
   Connector	Terminal
   M188	5	Ground	0 V

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Repair or replace harness or connector.

CHECK SOS SWITCH LED (GREEN) SIGNAL CIRCUIT FOR SHORT

Ignition switch OFF.

Check the continuity between TCU connector and ground.

TCU		Ground	Continuity
Connector	Terminal
M188	5		No

Is the inspection result normal?

YES>>

Replace telematics switch. Refer to Removal and Installation.

NO>>

Repair or replace harness or connector.

B2e0f Gps Antenna Nissan Pathfinder

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
B2E0F–06	GPS antenna (GNSS COMMUNICATIONS FAILURE)	Diagnosis condition	When receiving remote command
		Signal (terminal)	—
		Threshold	—
		Diagnosis delay time	—

POSSIBLE CAUSE

No service between server and TCU

FAIL-SAFE

Remote function does not operate

Confirmation Procedure

PERFORM DTC CONFIRMATION PROCEDURE

CONSULT

1. Ignition switch ON.

2. Ignition switch OFF and wait at least 30 seconds.

3. Ignition switch ON and wait at least 30 seconds or more.

4. Select “Self Diagnostic Result” mode of “IVC”.

5. Check DTC.

Is DTC B2E0F–06 detected?

YES>>

Proceed 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 CONFIRMATION PROCEDURE AGAIN

CONSULT

1. Ignition switch ON.

2. Erase DTC.

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

Is DTC B2E0F–06 detected again?

YES>>

Replace TCU. Refer to Removal and Installation.

NO>>

Inspection End.

B2e12 Configuration Nissan Pathfinder SUV

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
B2E12-55	Configuration (Configuration)	Diagnosis condition	When ignition switch is ON
		Signal (terminal)	—
		Threshold	Configuration not complete
		Diagnosis delay time	1 second or more

POSSIBLE CAUSE

• System configuration has not been made or is incomplete

• TCU

FAIL-SAFE

TCU has not been initialized

Confirmation Procedure

PERFORM DTC CONFIRMATION PROCEDURE

CONSULT

1. Ignition switch ON.

2. Ignition switch OFF and wait at least 30 seconds.

3. Ignition switch ON and wait at least 30 seconds or more.

4. Select “Self Diagnostic Result” mode of “IVC”.

5. Check DTC.

Is DTC B2E12–55 detected?

YES>>

Proceed 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 CONFIGURATION

When B2E12–55 is detected, perform configuration of TCU. Refer to Description.

>>

GO TO 2.

PERFORM CONFIRMATION PROCEDURE AGAIN

CONSULT

1. Ignition switch ON.

2. Erase DTC.

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

Is DTC B2E12–55 detected?

YES>>

Replace TCU. Refer to Removal and Installation.

NO>>

Inspection End.

B2e1b Automatic Ecall Nissan Pathfinder SUV

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
B2E1B–06	Automatic eCall Locked (Automatic eCall Locked)	Diagnosis condition	Ignition switch ON
		Signal (terminal)	—
		Threshold	Internal communication
		Diagnosis delay time	More than 1 second
B2E1B–97		Diagnosis condition	Ignition switch ON
		Signal (terminal)	—
		Threshold	Automatic report function of the TCU is activated
		Diagnosis delay time	1 second or more

POSSIBLE CAUSE

• Failure type byte 06 – Internal communication

• Failure type byte 97 – Automatic report function of the TCU is activated

FAIL-SAFE

• Failure type byte 06 – Telematics system does not operate

• Failure type byte 97 – Automatic emergency call does not operate

Confirmation Procedure

PERFORM DTC CONFIRMATION PROCEDURE

CONSULT

1. Ignition switch ON.

2. Ignition switch OFF and wait at least 30 seconds.

3. Ignition switch ON and wait at least 30 seconds or more.

4. Select “Self Diagnostic Result” mode of “IVC”.

5. Check DTC.

Is DTC B2E1B detected?

YES>>

Proceed to DTC Diagnosis Procedure.

NO>>

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

NO>>

Confirmation after repair: Inspection End.

DTC Diagnosis Procedure

DETERMINE MALFUNCTION TYPE

CONSULT

1. Ignition switch ON.

2. Ignition switch OFF and wait at least 30 seconds.

3. Ignition switch ON and wait at least 30 seconds or more.

4. Select “Self Diagnostic Result” mode of “IVC”.

5. Check the DTC.

Is DTC B2E1B–06 or 97 detected?

YES>>

97 – GO TO 2.

YES>>

06 – GO TO 3.

NO>>

Refer to Intermittent Incident.

PERFORM AUTOMATIC REPORT PREVENTION RELEASE

Perform automatic report prevention release when DTC B2E1B-97 is detected.

YES>>

Perform “Automatic report prevention release.” Refer to Work Procedure.

PERFORM CONFIRMATION PROCEDURE AGAIN

CONSULT

1. Ignition switch ON.

2. Erase DTC.

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

Is DTC B2E1B–06 detected again?

YES>>

Replace TCU. Refer to Removal and Installation.

NO>>

Inspection End.

B2e32 Audio Unit Nissan Pathfinder 2025

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
B2E32-13	Audio unit (Audio unit)	Diagnosis condition	When ignition switch is ON
		Signal (terminal)	Sound signal
		Threshold	3.7 V or less
		Diagnosis delay time	1 second or more
B2E32-11		Diagnosis condition	When ignition switch is ON
		Signal (terminal)	Sound signal
		Threshold	0.5 V or less
		Diagnosis delay time	1 second or more
B2E32-12		Diagnosis condition	When ignition switch is ON
		Signal (terminal)	Sound signal
		Threshold	5.0 V or more
		Diagnosis delay time	1 second or more

POSSIBLE CAUSE

• 13: Sound signal circuit is open

• 11: Sound signal circuit is short to ground

• 12: Sound signal circuit is short to battery

• AV control unit

FAIL-SAFE

Telematics sound is not output

Confirmation Procedure

PERFORM DTC CONFIRMATION PROCEDURE

CONSULT

1. Ignition switch ON.

2. Ignition switch OFF and wait at least 30 seconds.

3. Ignition switch ON and wait at least 30 seconds or more.

4. Select “Self Diagnostic Result” mode of “IVC”.

5. Check DTC.

Is DTC B2E32 detected?

YES>>

Proceed to DTC Diagnosis Procedure.

NO>>

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

NO>>

Confirmation after repair: Inspection End.

DTC Diagnosis Procedure

DETERMINE MALFUNCTION TYPE

CONSULT

1. Ignition switch ON.

2. Ignition switch OFF and wait at least 30 seconds.

3. Ignition switch ON and wait at least 30 seconds or more.

4. Select “Self Diagnostic Result” mode of “IVC”.

5. Check DTC.

Is DTC B2E32–11, 12 or 13 detected?

YES>>

13 or 11 – GO TO 2.

YES>>

12 – GO TO 3.

NO>>

Refer to Intermittent Incident.

CHECK TEL VOICE SIGNAL CIRCUITS FOR OPEN OR SHORT TO GROUND

1. Ignition switch OFF.

2. Disconnect AV control unit and TCU connectors.

3. Check the continuity between AV control unit connector and TCU connector.

   AV control unit		TCU		Continuity
   Connector	Terminal	Connector	Terminal
   M123 (without Bose audio system) M160 (with Bose audio system)	32	M188	31	Yes
   	52		32

4. Check the continuity between AV control unit connector and ground.

   AV control unit			Continuity
   Connector	Terminal	Ground
   M123 (without Bose audio system) M160 (with Bose audio system)	32	—	No
   	52

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Repair or replace harness or connectors.

CHECK TEL VOICE SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY

1. Ignition switch OFF.

2. Disconnect AV control unit connector and TCU connector.

3. Ignition switch ON.

4. Check the voltage between AV control unit connector and ground.

   AV control unit		Ground	Voltage Approx.
   Connector	Terminal
   M123 (without Bose audio system) M160 (with Bose audio system)	32	—	0 V
   	52

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Repair or replace harness or connectors.

CHECK TEL VOICE SIGNAL

1. Connect AV control unit connector and TCU connector.

2. Ignition switch ON.

3. Check signal between the terminals of TCU connector.

   TCU			Condition	Reference value
   Connector	(+)	(−)
   	Terminal
   M188	31	32	Sound output

Is the inspection result normal?

YES>>

Replace AV control unit. Refer to Removal and Installation.

NO>>

Replace TCU. Refer to Removal and Installation.

B2e34 Tel Antenna Nissan Pathfinder

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
B2E34-13	TEL antenna (Telephone antenna)	Diagnosis condition	When ignition switch is ON
		Signal (terminal)	TEL antenna signal
		Threshold	Open circuit
		Diagnosis delay time	1 second or more
B2E34-11		Diagnosis condition	When ignition switch is ON
		Signal (terminal)	TEL antenna signal
		Threshold	Short to ground
		Diagnosis delay time	1 second or more
B2E34-12		Diagnosis condition	When ignition switch is ON
		Signal (terminal)	TEL antenna signal
		Threshold	Short to battery
		Diagnosis delay time	1 second or more

POSSIBLE CAUSE

• 13: TEL antenna signal circuit is open

• 11: TEL antenna signal circuit is short to ground

• 12: TEL antenna signal circuit is short to battery

• TEL antenna

FAIL-SAFE

Telematics can not send and receive via network

Confirmation Procedure

PERFORM DTC CONFIRMATION PROCEDURE

CONSULT

1. Ignition switch ON.

2. Ignition switch OFF and wait at least 30 seconds.

3. Ignition switch ON and wait at least 30 seconds or more.

4. Select “Self Diagnostic Result” mode of “IVC”.

5. Check DTC.

Is DTC B2E34 detected?

YES>>

Proceed to DTC Diagnosis Procedure.

NO>>

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

NO>>

Confirmation after repair: Inspection End.

DTC Diagnosis Procedure

DETERMINE MALFUNCTION TYPE

CONSULT

1. Ignition switch ON.

2. Ignition switch OFF and wait at least 30 seconds.

3. Ignition switch ON and wait at least 30 seconds or more.

4. Select “Self Diagnostic Result” mode of “IVC”.

5. Check DTC.

Is DTC B2E34–11, 12 or 13 detected?

YES>>

13 – GO TO 2.

YES>>

11 – GO TO 3.

YES>>

12 – GO TO 4.

NO>>

Refer to Intermittent Incident.

CHECK TEL ANTENNA HARNESS AND CONNECTOR

1. Ignition switch OFF.

2. Check the TEL antenna connector connection condition and the harness for damage.

Is the inspection result normal?

YES>>

Replace TCU. Refer to Removal and Installation.

NO>>

Replace telematics antenna. Refer to Removal and Installation.

CHECK TEL ANTENNA SIGNAL CIRCUIT FOR SHORT TO GROUND

1. Ignition switch OFF.

2. Disconnect TCU connector.

3. Check the continuity between TCU connector and ground.

   TCU			Continuity
   Connector	Terminal	Ground
   M154	47	—	No
   	48

Is the inspection result normal?

YES>>

Replace TCU. Refer to Removal and Installation.

NO>>

Replace telematics antenna. Refer to Removal and Installation.

CHECK TEL ANTENNA SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY

1. Ignition switch OFF.

2. Disconnect TCU connector.

3. Ignition switch ON.

4. Check the voltage between TCU connector and ground.

   TCU		Ground	Voltage Approx.
   Connector	Terminal
   M154	47	—	0 V
   	48

Is the inspection result normal?

YES>>

Replace TCU. Refer to Removal and Installation.

NO>>

Replace telematics antenna. Refer to Removal and Installation.

B2e4f Bcm Pairing Nissan Pathfinder SUV

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
B2E4F-08	BCM pairing (BCM pairing)	Diagnosis condition	When ignition switch is ON
		Signal (terminal)	BCM CAN signal
		Threshold	—
		Diagnosis delay time	—

POSSIBLE CAUSE

• After TCU replacement, Intelligent Key registration has not been performed

• TCU-BCM pairing during Intelligent Key registration has not been performed

FAIL-SAFE

Remote engine start functions cannot be used

Confirmation Procedure

PERFORM DTC CONFIRMATION PROCEDURE

CONSULT

1. Ignition switch ON.

2. Ignition switch OFF and wait at least 30 seconds.

3. Ignition switch ON and wait at least 30 seconds or more.

4. Select “Self Diagnostic Result” mode of “IVC”.

5. Check DTC.

Is DTC B2E4F–08 detected?

YES>>

Proceed to DTC Diagnosis Procedure.

NO>>

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

NO>>

Confirmation after repair: Inspection End.

DTC Diagnosis Procedure

RE-REGISTER INTELLIGENT KEYS

Re-register all Intelligent Keys. For initialization and registration of Intelligent Keys, refer to CONSULT Immobilizer mode and follow the on-screen instructions.

YES>>

GO TO 2.

PERFORM SELF-DIAGNOSIS

CONSULT

1. Erase ‘Self Diagnostic Result" mode of "IVC".

2. Ignition switch OFF –> ON.

3. Select ‘Self Diagnostic Result" mode of "IVC".

4. Check DTC.

Is DTC B2E4F–08 detected?

YES>>

Replace TCU. Refer to Removal and Installation.

NO>>

Inspection End.

U0074 Av Communication Nissan Pathfinder 2022

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
U0074-00	AV communication (Control module communication bus B off)	Diagnosis condition	When ignition switch is ON
		Signal (terminal)	AV communication signal
		Threshold	Transmission or reception error
		Diagnosis delay time	1 second or more

POSSIBLE CAUSE

AV communication circuit

FAIL-SAFE

Telematics system does not operate

Confirmation Procedure

PERFORM DTC CONFIRMATION PROCEDURE

CONSULT

1. Ignition switch ON.

2. Ignition switch OFF and wait at least 30 seconds.

3. Ignition switch ON and wait at least 30 seconds or more.

4. Select “Self Diagnostic Result” mode of “IVC”.

5. Check DTC.

Is DTC U0074–00 detected?

YES>>

Proceed 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 TCU POWER SUPPLY AND GROUND CIRCUIT

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

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Repair or replace malfunctioning parts.

CHECK AV COMMUNICATION CIRCUIT (1)

1. Ignition switch OFF.

2. Disconnect the following connectors:

   • AV control unit

   • Bose speaker amp.

   • Combination meter

   • TCU

   • Head up display unit

3. Check the continuity between AV control unit connector and TCU connector.

   AV control unit		TCU		Continuity
   Connector	Terminal	Connector	Terminal
   M123 (without Bose audio system) M160 (with Bose audio system)	22	M188	26	Yes
   	23
   	42		27
   	43

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair or replace harness or connector.

CHECK AV COMMUNICATION CIRCUIT (2)

Check the continuity between TCU connector terminals.

TCU			Continuity
Connector	Terminal
M188	26	27	No

Is the inspection result normal?

YES>>

Replace TCU. Refer to Removal and Installation.

NO>>

Repair or replace harness or connector.

U0079 Can Communication Nissan Pathfinder

DTC Description

DESCRIPTION

CAN (Controller Area Network) is a serial communication line for real-time application. It is an on-Nissan Pathfinder vehicle multiplex communication line with high data communication speed and excellent error detection ability. Many electronic control units are equipped onto a Nissan Pathfinder vehicle, and each control unit shares information and links with other control units during operation (not independently). In CAN communication, control units are connected with 2 communication lines (CAN-High line, CAN-Low line) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads required data only. CAN Communication Signal Chart. Refer to CAN Communication Signal Chart.

DTC DETECTION LOGIC

DTC No.	CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
U0079-00	CAN communication (Control module communication bus G off)	Diagnosis condition	When ignition switch is ON
		Signal (terminal)	CAN communication signal
		Threshold	Transmission or reception error
		Diagnosis delay time	2 seconds or more

POSSIBLE CAUSE

CAN communication system

FAIL-SAFE

Telematics system does not operate

Confirmation Procedure

PERFORM DTC CONFIRMATION PROCEDURE

CONSULT

1. Ignition switch ON.

2. Ignition switch OFF and wait at least 30 seconds.

3. Ignition switch ON and wait at least 30 seconds or more.

4. Select “Self Diagnostic Result” mode of “IVC”.

5. Check DTC.

Is DTC U0079–00 detected?

YES>>

Proceed 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 CONFIRMATION PROCEDURE AGAIN

CONSULT

1. Ignition switch ON.

2. Erase DTC.

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

Is DTC U0079–00 detected again?

YES>>

Replace TCU. Refer to Removal and Installation.

NO>>

Inspection End.

Power Supply and Ground Circuit Nissan Pathfinder 5th Gen

Diagnosis Procedure

CHECK FUSE

Check that the following fuse is not blown.

Terminal No.	Signal name	Fuse No.	Capacity
1	Battery power supply	17	(10A)

Are the fuses blown?

YES>>

Replace the blown fuse after repairing the affected circuit.

NO>>

GO TO 2.

CHECK POWER SUPPLY CIRCUIT

1. Ignition switch OFF.

2. Disconnect TCU connector .

3. Check voltage between TCU connector and ground.

   TCU		Ground	Condition	Voltage (Approx.)
   Connector	Terminal
   M188	1	—	Ignition switch: OFF	Battery voltage

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair or replace harness or connectors.

CHECK GROUND CIRCUIT

1. Ignition switch OFF.

2. Check continuity between TCU connector and ground.

   TCU		Ground	Continuity
   Connector	Terminal
   M188	28	—	Yes
   	29

Is the inspection result normal?

YES>>

Inspection End.

NO>>

Repair or replace harness or connectors.