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

• B2a04 Calibration
• B2a05 Configuration
• B2a07 Steering Angle Sensor
• B2a1a Rear Camera
• B2a1f Camera Power Supply
• B2a2c Power Supply
• U1327 Mac Key Update
• U2141 Can Comm Err (tcm)
• U214f Mac Comm Error (bcm)
• U2a04 Comm Bus Off Its1-Fd
• Power Supply and Ground Circuit

B2a04 Calibration Nissan Pathfinder

DTC Description

DTC DETECTION LOGIC

DTC	CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
B2A04-51	Calibration (Around view monitor control unit)	Diagnosis condition	Ignition switch ON
		Signal (terminal)	—
		Threshold	Calibration is incomplete or the connected camera is different from the one when calibrated.
		Diagnosis delay time	2 seconds or more

POSSIBLE CAUSE

Camera calibration

FAIL-SAFE

• Unmatched icon display (red) is displayed (applicable for unmatched camera only).

• MOD (Moving Object Detection) function is stopped.

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 “AVM”.

5. Check DTC.

Is DTC B2A04–51 detected?

YES>>

Proceed to Diagnosis Procedure.

NO>>

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

NO>>

Confirmation after repair: Inspection End.

Diagnosis Procedure

PERFORM CALIBRATING CAMERA IMAGE

When DTC B2A04–51 is detected, perform camera calibration.

>>

Perform camera calibration. Refer to Work Procedure.

B2a05 Configuration Nissan Pathfinder SUV

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
B2A05–44	Configuration (Around view monitor control unit)	Diagnosis condition	Ignition switch ON
		Signal (terminal)	—
		Threshold	Internal abnormality
		Diagnosis delay time	2 seconds or more
B2A05–45		Diagnosis condition	Ignition switch ON
		Signal (terminal)	—
		Threshold	Internal abnormality
		Diagnosis delay time	2 seconds or more
B2A05–46		Diagnosis condition	Ignition switch ON
		Signal (terminal)	—
		Threshold	Internal abnormality
		Diagnosis delay time	2 seconds or more
B2A05–49		Diagnosis condition	Ignition switch ON
		Signal (terminal)	—
		Threshold	Internal abnormality
		Diagnosis delay time	2 seconds or more
B2A05–55		Diagnosis condition	Ignition switch ON
		Signal (terminal)	—
		Threshold	Configuration is incomplete
		Diagnosis delay time	2 seconds or more

POSSIBLE CAUSE

• Around view monitor control unit

• Vehicle specification is incomplete

FAIL-SAFE

• On applicable camera screen marking (Red) is displayed.

• MOD (Moving Object Detection) function is stopped.

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 “AVM”.

5. Check DTC.

Is DTC B2A05 detected?

YES>>

Proceed to Diagnosis Procedure.

NO>>

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

NO>>

Confirmation after repair: Inspection End.

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 “AVM”.

5. Check DTC.

Is DTC B2A05–44, 45, 46, 49, or 55 detected?

YES>>

44, 45, 46 or 49 – GO TO 3.

YES>>

55 – GO TO 2.

NO>>

Refer to Intermittent Incident.

PERFORM CONFIGURATION PROCEDURE

Perform configuration of around view monitor control unit. Refer to Description.

>>

GO TO 3.

PERFORM DTC CONFIRMATION PROCEDURE AGAIN

CONSULT

1. Ignition switch ON.

2. Erase DTC.

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

Is DTC B1341–44, 45, 46,49 or 55 detected again?

YES>>

Replace around view monitor control unit. Refer to Removal and Installation.

NO>>

Inspection End.

B2a07 Steering Angle Sensor Nissan Pathfinder

DTC Description

DTC DETECTION LOGIC

DTC	CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
B2A07–86	Steering angle sensor (Steering angle sensor)	Diagnosis condition	Ignition switch ON
		Signal (terminal)	CAN communication signal
		Threshold	The steering angle sensor is malfunctioning
		Diagnosis delay time	2 seconds or more

POSSIBLE CAUSE

• ABS actuator and electric unit (control unit)

• Steering angle sensor

• Around view monitor control unit

FAIL-SAFE

• Predicted course line is not displayed.

• MOD (Moving Object Detection) function is cancelled.

Confirmation Procedure

CHECK DTC PRIORITY

If DTC B2A07–86 is displayed with DTC B2156–87, first perform the trouble diagnosis for DTC B2156–87.

Is DTC B2156–87 detected?

YES>>

Refer to DTC Description.

NO>>

GO TO 2.

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 “AVM”.

5. Check DTC.

Is DTC B2A07–86 detected?

YES>>

Proceed to Diagnosis Procedure.

NO>>

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

NO>>

Confirmation after repair: Inspection End.

Diagnosis Procedure

CHECK SELF-DIAGNOSIS RESULTS

CONSULT

Check if U2156–87 is detected with B2A07–86 in “Self Diagnostic Result” mode of “AVM”.

Is U2156–87 detected?

YES>>

Perform diagnosis of U2156–87. Refer to DTC Description.

NO>>

GO TO 2.

CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) SELF-DIAGNOSIS RESULTS

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 “ABS”.

5. Check DTC.

Are any DTCs detected?

YES>>

Perform diagnosis on the detected DTC and repair or replace the malfunctioning parts. Refer to DTC Index.

NO>>

Replace around view monitor control unit. Refer to Removal and Installation.

B2a1a Rear Camera Nissan Pathfinder 2025

DTC Description

DTC DETECTION LOGIC

DTC	CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
B2A1A-13	Rear camera (Rear cameral)	Diagnosis condition	Ignition switch ON
		Signal (terminal)	LVDS (rear camera)
		Threshold	Communication error with rear camera
		Diagnosis delay time	30 seconds or more
B2A1A-31		Diagnosis condition	Ignition switch ON
		Signal (terminal)	LVDS (rear camera)
		Threshold	Communication error with rear camera
		Diagnosis delay time	30 seconds or more

POSSIBLE CAUSE

• LVDS cable (between around view monitor control unit and rear camera)

• Rear camera

FAIL-SAFE

• Camera image may not be displayed

• MOD (Moving Object Detection) function is stopped.

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 “AVM”.

5. Check DTC.

Is DTC B2A1A–13 or 31 detected?

YES>>

Proceed to Diagnosis Procedure.

NO>>

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

NO>>

Confirmation after repair: Inspection End.

Diagnosis Procedure

CHECK LVDS CABLE 1

1. Ignition switch OFF.

2. Check the connection status of the LVDS cable connector. (around view monitor control unit side, wire to wire, and rear camera side)

Is inspection result normal?

YES>>

GO TO 2.

NO>>

Connect the LVDS cable connector correctly.

CHECK LVDS CABLE 2

1. Ignition switch OFF.

2. Disconnect around view monitor control unit connector and rear camera connector.

3. Check continuity between around view monitor control unit harness connector and rear camera harness connector.

   Around view monitor control unit		Rear camera		Continuity
   Connector	Terminals	Connector	Terminals
   M97	37	B463	1	Yes
   	38		2

4. Check continuity between around view monitor control unit harness connector and ground.

   Around view monitor control unit		Ground	Continuity
   Connector	Terminal
   M97	37		No

Is inspection result normal?

YES>>

Replace rear camera. Refer to Removal and Installation.

NO>>

Replace LVDS cable.

B2a1f Camera Power Supply Nissan Pathfinder 2025

DTC Description

DTC DETECTION LOGIC

DTC	CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
B2A1F-16	Camera power supply (Camera power supply)	Diagnosis condition	Ignition switch ON
		Signal (terminal)	Camera power supply
		Threshold	0 V
		Diagnosis delay time	30 seconds or more

POSSIBLE CAUSE

• LVDS cable (between around view monitor control unit and each camera)

• Around view monitor control unit

FAIL-SAFE

• Camera image not displayed

• MOD (Moving Object Detection) function is stopped.

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 “AVM”.

5. Check DTC.

Is DTC B2A1F–16 detected?

YES>>

Proceed to Diagnosis Procedure.

NO>>

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

NO>>

Confirmation after repair: Inspection End.

Diagnosis Procedure

CHECK AROUND VIEW MONITOR CONTROL UNIT POWER SUPPLY CIRCUIT

Check around view monitor control unit power supply circuit. Refer to Diagnosis Procedure.

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Repair or replace malfunctioning parts.

CHECK LVDS CABLE 1

1. Ignition switch OFF.

2. Check the connection status of the LVDS cable connector (around view monitor control unit side, wire to wire, and each camera side)

   .

Is inspection result normal?

YES>>

GO TO 3.

NO>>

Connect the LVDS cable connector correctly.

CHECK LVDS CABLE 2

1. Ignition switch OFF.

2. Disconnect around view monitor control unit connector and each camera connector.

3. Check continuity between around view monitor control unit harness connector and each camera harness connector.

   Around view monitor control unit		Each camera		Continuity
   Connector	Terminals	Connector	Terminals
   M97	39	E226 (front camera)	1	Yes
   	33	D51 (side camera LH)	1
   	35	D151 (side camera RH)	1
   	37	B463 (rear camera)	1

Is inspection result normal?

YES>>

Replace around view monitor control unit. Refer to Removal and Installation.

NO>>

Replace defective LVDS cable.

B2a2c Power Supply Nissan Pathfinder

DTC Description

DTC DETECTION LOGIC

DTC	CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
B2A2C-A2	Power supply (Power supply)	Diagnosis condition	Ignition switch ON
		Signal (terminal)	ACC power supply
		Threshold	ACC power supply voltage is low
		Diagnosis delay time	30 seconds or more

POSSIBLE CAUSE

• ACC power supply circuit

• Around view monitor control unit

FAIL-SAFE

• Camera image not displayed

• MOD (Moving Object Detection) function is stopped.

Confirmation Procedure

If DTC B2A07–86 is displayed with DTC B2156–87, first perform the trouble diagnosis for DTC B2156–87.

Is the applicable DTC detected?

YES>>

Perform diagnosis of DTC B2156–87. Refer to DTC Description.

NO>>

GO TO 2.

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 “AVM”.

5. Check DTC.

Is DTC B2A2C–A3 detected?

YES>>

Proceed to Diagnosis Procedure.

NO>>

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

NO>>

Confirmation after repair: Inspection End.

Diagnosis Procedure

CHECK AROUND VIEW MONITOR CONTROL UNIT POWER SUPPLY CIRCUIT

Check around view monitor control unit power supply circuit. Refer to Diagnosis Procedure.

Is the inspection result normal?

YES>>

Replace around view monitor control unit. Refer to Removal and Installation.

NO>>

Repair or replace malfunctioning parts.

U1327 Mac Key Update Nissan Pathfinder

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen terms (Trouble diagnosis content)		DTC detection condition
U1327–52	MAC key update (Message Authentication Code key update)	—	Diagnosis condition	—
			Signal (terminal)	—
			Threshold	MAC key writing is incomplete
			Diagnosis delay time	—
U1327–54			Diagnosis condition	—
			Signal (terminal)	—
			Threshold	MAC key is not written after around view monitor control unit replacement
			Diagnosis delay time	—

POSSIBLE CAUSE

• U1327–52:

  • Network communication error between CONSULT and around view monitor control unit

  • Around view monitor control unit used in other Nissan Pathfinder vehicle is installed in the vehicle

  • Around view monitor control unit

• U1327–54:

  • Writing of MAC key has not been executed

  • Around view monitor control unit

FAIL-SAFE

—

Confirmation Procedure

DTC CONFIRMATION PROCEDURE

NOTE:

If DTC U1327–52 is displayed with DTC U1327–54, first perform the trouble diagnosis for DTC U1327–54.

CONSULT

1. Ignition switch ON.

2. Select “MAC Diagnosis” mode of “AVM”.

Is DTC U1327–52 or 54 detected as the current malfunction?

YES>>

Refer to Diagnosis Procedure.

NO>>

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

NO>>

Confirmation after repair: Inspection End.

Diagnosis Procedure

DETERMINE MALFUNCTION TYPE

NOTE:

If DTC U1327–52 is displayed with DTC U1327–54, first perform the trouble diagnosis for DTC U1327–54.

CONSULT

1. Ignition switch ON.

2. Select “MAC Diagnosis” mode of “AVM”.

Is DTC U1327 detected?

YES>>

GO TO 2.

YES>>

GO TO 4.

NO>>

Refer to Intermittent Incident.

PERFORM MAC KEY WRITING

CONSULT

1. Perform MAC key writing. Refer to Description.

2. Select “MAC Diagnosis” mode of “AVM”.

Is DTC U1327–54 detected as the current malfunction?

YES>>

GO TO 3.

NO>>

Inspection End.

PERFORM MAC KEY WRITING 2

CONSULT

1. Perform MAC key writing. Refer to Description.

2. Select “MAC Diagnosis” mode of “AVM”.

Is DTC U1327–54 detected as the current malfunction?

YES>>

GO TO 4.

NO>>

Inspection End.

PERFORM MAC KEY WRITING 3

CONSULT

1. Perform MAC key writing. Refer to Description.

2. Select “MAC Diagnosis” mode of “AVM”.

Is DTC U1327–52 or 54 detected as the current malfunction?

YES>>

Replace around view monitor control unit. Refer to Removal and Installation.

NO>>

Inspection End.

U2141 Can Comm Err (tcm) Nissan Pathfinder R53

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
U2141-87	CAN comm err (TCM) [Controller area network communication error (TCM)]	Diagnosis condition	Ignition switch ON
		Signal (terminal)	CAN communication signal
		Threshold	Communication error
		Diagnosis delay time	2 seconds or more

POSSIBLE CAUSE

CAN communication system (TCM)

FAIL-SAFE

• Rear/front view is black screen (Bird-eye/Side view is displayed).

• Rear view is not displayed even if shift lever is in R position.

• MOD 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 “AVM”.

5. Check DTC.

Is DTC U2141–87 detected?

YES>>

Proceed to Diagnosis Procedure.

NO>>

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

NO>>

Confirmation after repair: Inspection End.

Diagnosis Procedure

PERFORM DTC CONFIRMATION PROCEDURE AGAIN

CONSULT

1. Ignition switch ON.

2. Erase DTC.

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

Is DTC U2141-87 detected again?

YES>>

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

NO>>

Inspection End.

U214f Mac Comm Error (bcm) Nissan Pathfinder 2022

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen items (Trouble diagnosis content)	DTC Detection Condition
U214F-57	CAN comm err (BCM) [Control Area Network communication error (BCM)]	Diagnosis condition	—
		Signal (terminal)	—
		Threshold	MAC communication error
		Diagnosis delay time	—

POSSIBLE CAUSE

• MAC communication error

• Around view monitor control unit used in other Nissan Pathfinder vehicles is installed in the vehicle

• Around view monitor control unit

• BCM

FAIL-SAFE

• Camera image is not displayed.

• MOD function does not operate.

Confirmation Procedure

CHECK DTC PRIORITY

If DTC U214F–57 is displayed with DTC U1327–52 or DTC U1327–54, first perform the trouble diagnosis for DTC U1327–52 or DTC U1327–54.

Is DTC U1327–52 or 54 detected?

YES>>

Refer to DTC Description.

NO>>

GO TO 2.

CHECK MAC DIAGNOSIS

CONSULT

1. Ignition switch ON.

2. Select “MAC Diagnosis” mode of “AVM”.

Is DTC U214F–57 detected?

YES>>

Proceed to Diagnosis Procedure.

NO>>

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

NO>>

Confirmation after repair: Inspection End.

Diagnosis Procedure

CHECK DTC PRIORITY

If DTC U214F-57 is displayed with DTC U1327-52 or DTC U1327-54, first perform the trouble diagnosis for DTC U1327-52 or U1327-54.

Is DTC U1327-52 or 54 detected?

YES>>

Refer to DTC Description.

NO>>

GO TO 2.

CHECK MAC DIAGNOSIS

CONSULT

Perform “MAC Diagnosis” mode of “AVM” .

Is DTC U214F-57 detected with DTC U2152-57 and DTC U2176–57 at the same time?

YES>>

Replace around view monitor control unit. Refer to Removal and Installation.

NO>>

GO TO 3.

CHECK CAN COMMUNICATION SYSTEM

Check CAN communication system. Refer to Trouble Diagnosis Flow Chart.

>>

Inspection End.

U2a04 Comm Bus Off Its1-Fd Nissan Pathfinder R53

DTC Description

DESCRIPTION

CAN (Controller Area Network) is a serial communication line for real time applications. It is an on-Nissan Pathfinder vehicle multiplex communication line with high data communication speed and excellent error detection ability. Modern Nissan Pathfinder vehicle is equipped with many electronic control unit, and each control unit shares information and links with other control units during operation (not independent). 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
U2A04-88	Comm Bus Off ITS1-FD (Communication Bus Off Intelligent Transport System1-FD)	Diagnosis condition	Ignition switch ON
		Signal (terminal)	CAN communication signal
		Threshold	Around view monitor control unit cannot communicate CAN communication signal
		Diagnosis delay time	2 seconds or more

POSSIBLE CAUSE

CAN communication system

FAIL-SAFE

• Camera image is not displayed.

• MOD 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 “AVM”.

5. Check DTC.

Is DTC U2A04–88 detected?

YES>>

Proceed to Diagnosis Procedure.

NO>>

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

NO>>

Confirmation after repair: Inspection End.

Diagnosis Procedure

PERFORM DTC CONFIRMATION PROCEDURE AGAIN

CONSULT

1. Ignition switch ON.

2. Erase DTC.

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

Is DTC U2A04-88 detected again?

YES>>

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

NO>>

Inspection End.

Power Supply and Ground Circuit Nissan Pathfinder 2022

Diagnosis Procedure

CHECK FUSE

Check that the following fuse is not blown.

Terminal No.	Signal name	Fuse No.	Capacity
17	Ignition signal	41	10 A

Is the fuse 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 around view monitor control unit connector.

3. Check voltage between around view monitor control unit connector and ground.

   Around view monitor control unit		(–)	Condition	Voltage (Approx.)
   Connector	Terminal
   M96	17	Ground	Ignition switch: ON	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 around view monitor control unit connector and ground.

   Around view monitor control unit		(–)	Continuity
   Connector	Terminal
   M96	16	Ground	Yes

Is the inspection result normal?

YES>>

Inspection End.

NO>>

Repair or replace harness or connectors.