Nissan Pathfinder: Lan System - Dtc/circuit Diagnosis

• B2600-42 Config Error
• B2600-56 Config Error
• U2340-87 Can Comm Circuit
• U278c-88 Ethernet Port1 Failure
• Power Supply and Ground Circuit

B2600-42 Config Error Nissan Pathfinder 2025

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen terms (Trouble diagnosis content)	DTC detected condition
B2600-42	CONFIG ERROR (Configuration error)	Diagnosis condition	When ignition switch is ON.
		Signal (terminal)	—
		Threshold	Errors are detected in the data stored in the 8CH CAN gateway (except programming data)
		Diagnosis delay time	2 seconds or more

POSSIBLE CAUSE

8CH CAN gateway

FAIL-SAFE

8CH CAN gateway stops transmitting and receiving the following.

• CAN communication signals between each CAN communication circuit

• Ethernet communication signals between each ethernet communication circuit

Confirmation Procedure

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

1. Turn ignition switch ON and wait at least 2 seconds or more.

2. Select “Self Diagnostic Result” mode of “8ch CAN GATEWAY 2” using CONSULT.

3. Check DTC.

Is DTC B2600-42 detected?

YES>>

Refer to DTC Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Intermittent Incident

NO-2>>

Confirmation after repair: INSPECTION END

DTC Diagnosis Procedure

PERFORM DTC CONFIRMATION PROCEDURE AGAIN

1. Turn ignition switch ON.

2. Erase DTC.

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

4. Check DTC.

Is DTC B2600-42 displayed?

YES>>

Replace 8CH CAN gateway. Refer to Removal and Installation.

NO>>

INSPECTION END

B2600-56 Config Error Nissan Pathfinder 2022

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen terms (Trouble diagnosis content)	DTC detected condition
B2600-56	CONFIG ERROR (Configuration error)	Diagnosis condition	When ignition switch is ON.
		Signal (terminal)	—
		Threshold	Monitoring mode is set.
		Diagnosis delay time	2 seconds or more

POSSIBLE CAUSE

8CH CAN gateway

FAIL-SAFE

—

Confirmation Procedure

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

1. Turn ignition switch ON and wait at least 2 seconds or more.

2. Select “Self Diagnostic Result” mode of “8ch CAN GATEWAY 2” using CONSULT.

3. Check DTC.

Is DTC B2600-56 detected?

YES>>

Refer to DTC Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Intermittent Incident

NO-2>>

Confirmation after repair: INSPECTION END

DTC Diagnosis Procedure

REMOVE AND INSTALL BATTERY

1. Turn ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Connect the battery cable to the negative terminal.

>>

GO TO 2.

PERFORM DTC CONFIRMATION PROCEDURE AGAIN

1. Turn ignition switch ON.

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

3. Check DTC.

Is DTC B2600-56 displayed?

YES>>

Replace 8CH CAN gateway. Refer to Removal and Installation.

NO>>

INSPECTION END

U2340-87 Can Comm Circuit Nissan Pathfinder 2025

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen terms (Trouble diagnosis content)	DTC detected condition
U2340-87	CAN COMM CIRCUIT (CAN communication circuit)	Diagnosis condition	When ignition switch is ON.
		Signal (terminal)	CAN communication signal
		Threshold	Lost communication with ECM
		Diagnosis delay time	4 seconds or more

POSSIBLE CAUSE

• Harness or connector

  (CAN communication line)

• 8CH CAN gateway

• ECM malfunction

FAIL-SAFE

System continue normal control.

Confirmation Procedure

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

1. Turn ignition switch ON and wait at least 4 seconds or more.

2. Select “Self Diagnostic Result” mode of “8ch CAN GATEWAY 2” using CONSULT.

3. Check DTC.

Is DTC U2340-87 detected?

YES>>

Refer to DTC Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Intermittent Incident

NO-2>>

Confirmation after repair: INSPECTION END

DTC Diagnosis Procedure

PERFORM DTC CONFIRMATION PROCEDURE AGAIN

1. Turn ignition switch ON.

2. Erase DTC.

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

4. Check DTC.

Is DTC “U2340-87” detected?

YES>>

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

NO>>

INSPECTION END

U278c-88 Ethernet Port1 Failure Nissan Pathfinder

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen terms (Trouble diagnosis content)	DTC detected condition
U278C-88	ETHERNET PORT1 FAILURE (Ethernet port1 failure)	Diagnosis condition	When ignition switch is ON.
		Signal (terminal)	—
		Threshold	Lost ethernet communication with AV control unit
		Diagnosis delay time	7 seconds or more

POSSIBLE CAUSE

• Ethernet harness

• 8CH CAN gateway

• AV control unit

FAIL-SAFE

8CH CAN gateway stops transmitting and receiving ethernet communication signals between ethernet communication circuit which cannot communicate.

Confirmation Procedure

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

1. Turn ignition switch ON and wait at least 3 minutes or more.

2. Select “Self Diagnostic Result” mode of “8ch CAN GATEWAY 2” using CONSULT.

3. Check DTC.

Is DTC U278C–88 detected?

YES>>

Refer to DTC Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Intermittent Incident

NO-2>>

Confirmation after repair: INSPECTION END

DTC Diagnosis Procedure

CHECK CONNECTOR

1. Ignition switch OFF.

2. Check the ethernet harness connectors and terminals of 8CH CAN gateway and AV control unit for damage or looseness.

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Repair or replace the malfunction part, securely lock the harness connector.

PERFORM ALL DTC READING

1. Ignition switch ON.

2. Perform “All DTC Reading” with CONSULT.

3. Check if any DTCs of ethernet (DTC “U2754-88”) are detected in “Self Diagnostic Result” of “MULTI AV”

Are any DTCs of ethernet detected?

YES>>

Replace the 8CH CAN gateway (Refer to Removal and Installation), and GO TO 3.

NO>>

Replace the AV control unit. Refer to Removal and Installation.

PERFORM DTC CONFIRMATION PROCEDURE-1

1. Erases all self-diagnosis results with CONSULT.

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

Is DTC “U278C-88” detected as the current malfunction?

YES>>

Replace the AV control unit (Refer to Removal and Installation), and GO TO 4.

NO>>

INSPECTION END

PERFORM DTC CONFIRMATION PROCEDURE-2

1. Erases all self-diagnosis results with CONSULT.

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

Is DTC “U278C-88” detected as the current malfunction?

YES>>

Replace the ethernet harness between 8CH CAN gateway and AV control unit.

NO>>

INSPECTION END

Power Supply and Ground Circuit Nissan Pathfinder 2022

8ch Can Gateway

Diagnosis Procedure

CHECK FUSE

Check that the following fuse are not blown.

Signal name	Fuse No.
Battery power supply	16
Ignition power supply	9
Accessory power supply	40

Is the fuse blown (open)?

YES>>

Replace the blown fuse after repairing the affected circuit if a fuse is blown.

NO>>

GO TO 2.

CHECK POWER SUPPLY CIRCUIT

1. Turn the ignition switch OFF.

2. Disconnect the connector of 8CH CAN gateway.

3. Check voltage between 8CH CAN gateway harness connector and ground.

   Terminals			Condition	Voltage (Standard)	Voltage (Reference value)
   (+)		(−)
   8CH CAN gateway		Ground	Ignition switch
   Connector	Terminal
   M5	1		OFF	6 – 16 V	Battery voltage
   	17		ON	7 – 16 V	Battery voltage
   	18		ACC	7 – 16 V	Battery voltage

Is the measurement value normal?

YES>>

GO TO 3.

NO>>

Repair harness or connector.

CHECK GROUND CIRCUIT

Check continuity between 8CH CAN gateway harness connector and ground.

8CH CAN gateway		Ground	Continuity
Connector	Terminal
M5	21		Existed
	28

Does continuity exist?

YES>>

INSPECTION END

NO>>

Repair harness or connector.