Nissan Pathfinder: Driver Assistance System - Dtc/circuit Diagnosis

• C1f89-04 Side Radar Lh
• U1327-52 Mac Key
• U1327-54 Mac Key
• U2112-87 Can Comm Circuit
• U214f-57 Mac Comm Error (bcm)
• U2150-87 Can Comm Circuit
• U2752-88 Ethernet Circuit
• Power Supply and Ground Circuit
• 4025 C1f00-1c Control Unit
• 4025 C1f00-44 Control Unit
• 4025 C1f00-4b Control Unit
• 4025 C1f00-54 Hands Off Threshold Incomplete
• 4025 C1f02-16 Power Supply Circuit
• 4025 C1f07-62 Operation Sw Circ
• 4025 C1f03-23 Operation Sw Circ
• 4025 C1f03-72 Stop Lamp Relay
• 4025 C1f04-48 Feb Ope Count Limit
• 4025 C1f04-61 Brake Sw/stop Lamp Sw
• 4026 C1f05-49 Front Camera Unit
• 4026 C1f05-4b Front Camera Unit
• 4026 C1f05-54 Front Camera Unit
• 4026 C1f05-82 Front Camera Unit
• 4026 C1f36-55 Configuration
• 4026 C1f43-04 Around View Monitor Control Unit
• 4026 C1f48-16 Abs/tcs/vdc System
• 4026 C1f48-62 Abs/tcs/vdc System
• 4026 C1f5f-04 Distance Sensor
• 4026 C1f70-87 Ethernet Circuit

C1f89-04 Side Radar Lh Nissan Pathfinder 2025

DTC Description

DTC DETECTION LOGIC

DTC		CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
C1F89	04	Side radar rear LH (Side radar rear left hand)	Diagnosis condition	When engine is running
			Signal (terminal)	—
			Threshold	ADAS control unit 2 detects that side radar LH has a malfunction.
			Diagnosis delay time	2 seconds or more

POSSIBLE CAUSE

Side radar LH

FAIL-SAFE

The following systems are canceled.

• I-BSI

CONFIRMATION PROCEDURE

CHECK SELF-DIAGNOSIS RESULTS

If DTC “C1F89-04” is displayed with Network-DTC, first diagnose the Network-DTC.

Is applicable DTC detected?

YES>>

Perform diagnosis of applicable. Refer to DTC Index.

NO>>

GO TO 2.

PERFORM DTC CONFIRMATION PROCEDURE

1. Start the engine.

2. Perform “All DTC Reading” with CONSULT.

3. Check if the “C1F89-04” is detected as the current malfunction in “Self Diagnostic Result” of “ICC/ADAS 2”.

Is “C1F89-04” detected as the current malfunction?

YES>>

Refer to DTC Diagnosis Procedure.

NO-1>>

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

NO-2>>

Confirmation after repair: INSPECTION END

DTC Diagnosis Procedure

CHECK SELF-DIAGNOSIS RESULTS

If DTC “C1F89-04” is displayed with Network-DTC, first diagnose the Network-DTC.

Is applicable DTC detected?

YES>>

Perform diagnosis of applicable. Refer to DTC Index.

NO>>

GO TO 2.

CHECK SELF-DIAGNOSIS RESULTS

Check if any DTC is detected in “Self Diagnostic Result” of “Side radar (Rear left)”.

Is any DTC detected?

YES>>

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

NO>>

Replace the ADAS control unit 2. Refer to Removal and Installation.

U1327-52 Mac Key Nissan Pathfinder R53

DTC Description

DTC DETECTION LOGIC

DTC		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	—

POSSIBLE CAUSE

• Network communication error between CONSULT and ADAS control unit 2

• ADAS control unit 2 used in other Nissan Pathfinder vehicles is installed in the vehicle

• ADAS control unit 2

FAIL-SAFE

The following systems are canceled.

• Vehicle-to-vehicle distance control mode

• Conventional (fixed speed) cruise control mode

• Steering wheel assistance function

• AEB

• RAB

• I-FCW

• LDW

• I-LI

• I-BSI

• TSR

• I-DA

CONFIRMATION PROCEDURE

CHECK DTC PRIORITY

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

Is applicable DTC detected?

YES>>

Refer to DTC Description.

NO>>

GO TO 2.

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

1. Ignition switch ON.

2. Perform “MAC key writing”. Refer to Work Procedure.

3. Perform “MAC Diagnosis” of “ICC/ADAS 2” using CONSULT.

Is DTC “U1327-52” detected as the current malfunction?

YES>>

Refer to DTC Diagnosis Procedure.

NO-1 >>

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

NO-2>>

Confirmation after repair: INSPECTION END

DTC Diagnosis Procedure

CHECK DTC PRIORITY

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

Is applicable DTC detected?

YES>>

Refer to DTC Description.

NO>>

GO TO 2.

PERFORM MAC KEY WRITING

With CONSULT

1. Perform “MAC key writing”. Refer to Work Procedure.

2. Perform “MAC Diagnosis” of “ICC/ADAS 2” using CONSULT.

Is DTC “U1327-52” detected as the current malfunction?

YES>>

Replace the ADAS control unit 2. Refer to Removal and Installation.

NO>>

INSPECTION END.

U1327-54 Mac Key Nissan Pathfinder 2025

DTC Description

DTC DETECTION LOGIC

DTC		CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
U1327	54	MAC key update (Message Authentication Code key update)	Diagnosis condition	—
			Signal (terminal)	—
			Threshold	MAC key is not written after ADAS control unit 2 replacement
			Diagnosis delay time	—

POSSIBLE CAUSE

• Writing of MAC key has not been executed

• ADAS control unit 2

FAIL-SAFE

The following systems are canceled.

• Vehicle-to-vehicle distance control mode

• Conventional (fixed speed) cruise control mode

• Steering wheel assistance function

• AEB

• RAB

• I-FCW

• LDW

• I-LI

• I-BSI

• TSR

• I-DA

CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

1. Ignition switch ON.

2. Perform “MAC Diagnosis” of “ICC/ADAS 2” using CONSULT.

Is DTC “U1327-54” detected as the current malfunction?

YES>>

Refer to DTC Diagnosis Procedure.

NO-1>>

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

NO-2 >>

Confirmation after repair: INSPECTION END

DTC Diagnosis Procedure

PERFORM MAC KEY WRITING

With CONSULT

1. Perform “MAC key writing”. Refer to Work Procedure.

2. Perform “MAC Diagnosis” of “ICC/ADAS 2” using CONSULT.

Is DTC “U1327-54” detected as the current malfunction?

YES>>

GO TO 2.

NO>>

INSPECTION END.

PERFORM MAC KEY WRITING AGAIN (SECOND TIMES)

With CONSULT

1. Restart CONSULT.

2. Perform “MAC Key writing” again. Refer to Work Procedure.

3. Perform “MAC Diagnosis” of “ICC/ADAS 2” using CONSULT.

Is DTC “U1327-54” detected as the current malfunction?

YES>>

GO TO 3.

NO>>

INSPECTION END

PERFORM MAC KEY WRITING AGAIN (THIRD TIMES)

With CONSULT

1. Restart CONSULT.

2. Perform “MAC Key writing” again. Refer to Work Procedure.

3. Perform “MAC Diagnosis” of “ICC/ADAS 2” using CONSULT.

Is DTC “U1327-54” detected as the current malfunction?

YES>>

Replace the ADAS control unit 2. Refer to Removal and Installation.

NO>>

INSPECTION END

U2112-87 Can Comm Circuit Nissan Pathfinder 5th Gen

DTC Description

CAN COMMUNICATION

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 units, 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-H, CAN-L) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads the required data only.

CAN communication signal chart. Refer to Trouble Diagnosis Flow Chart.

DTC DETECTION LOGIC

DTC		CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
U2112	87	CAN comm err (brake unit) [Controller area network communication error (brake unit)]	Diagnosis condition	When engine is running When AEB system is ON
			Signal (terminal)	CAN communication signal
			Threshold	If ADAS control unit 2 is not transmitting or receiving CAN communication signal
			Diagnosis delay time	2 seconds or more

NOTE:

If “U2112-87” is detected, first diagnose the CAN communication system.

POSSIBLE CAUSE

CAN communication system

FAIL-SAFE

The following systems are canceled.

• Vehicle-to-vehicle distance control mode

• Conventional (fixed speed) cruise control mode

• Steering wheel assistance function

• AEB

• RAB

• I-FCW

• LDW

• I-LI

• I-BSI

• TSR

• I-DA

NOTE:

With the detection of “U2112-87” some systems do not perform the fail-safe operation. A system controlling based on a signal received from the control unit performs fail-safe operation when the communication with the ADAS control unit 2 becomes inoperable.

CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

1. Start the engine.

2. Turn the AEB system ON.

3. Perform “All DTC Reading” with CONSULT.

4. Check if the “U2112-87” is detected as the current malfunction in “Self Diagnostic Result” of “ICC/ADAS 2”.

Is “U2112-87” detected as the current malfunction?

YES>>

Refer to DTC Diagnosis Procedure.

NO-1 >>

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

NO-2 >>

Confirmation after repair: INSPECTION END

DTC Diagnosis Procedure

PERFORM THE SELF-DIAGNOSIS

1. Turn the ignition switch ON.

2. Turn the AEB system ON, and then wait for 30 seconds or more.

3. Perform “All DTC Reading” with CONSULT.

4. Check if the “U2112-87” is detected as the current malfunction in “Self Diagnostic Result” of “ICC/ADAS 2”.

Is “U2112-87” detected as the current malfunction?

YES>>

Refer to Trouble Diagnosis Flow Chart.

NO>>

INSPECTION END

U214f-57 Mac Comm Error (bcm) Nissan Pathfinder 5th Gen

DTC Description

DTC DETECTION LOGIC

DTC		CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
U214F	57	CAN comm err (BCM) [Controller area network communication error (Body control module)]	Diagnosis condition	—
			Signal (terminal)	—
			Threshold	MAC communication error
			Diagnosis delay time	—

POSSIBLE CAUSE

• MAC communication error

• ADAS control unit 2used in other vehicles is installed in the Nissan Pathfinder vehicle

• ADAS control unit 2

• BCM

FAIL-SAFE

The following systems are canceled.

• Vehicle-to-vehicle distance control mode

• Conventional (fixed speed) cruise control mode

• Steering wheel assistance function

• AEB

• RAB

• I-FCW

• LDW

• I-LI

• I-BSI

• TSR

• I-DA

CONFIRMATION PROCEDURE

CHECK DTC PRIORITY

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

Is DTC “U1327-52” or “U1327-54” detected?

YES>>

Perform diagnosis of applicable. Refer to the following.

• U1327-52: DTC Description

• U1327-54: DTC Description

NO>>

GO TO 2.

CHECK MAC DIAGNOSIS

With CONSULT

1. Ignition switch ON.

2. Perform “MAC Diagnosis” mode of “ICC/ADAS 2” using CONSULT.

Is DTC “U214F-57” detected?

YES>>

Refer to DTC Diagnosis Procedure.

NO-1 >>

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

NO-2>>

Confirmation after repair: INSPECTION END

DTC Diagnosis Procedure

CHECK DTC PRIORITY

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

Is DTC “U1327-52” or “U1327-54” detected?

YES>>

Perform diagnosis of applicable. Refer to the following.

• U1327-52: DTC Description

• U1327-54: DTC Description

NO>>

GO TO 2.

CHECK MAC DIAGNOSIS

With CONSULT

Perform “MAC Diagnosis” mode of “ICC/ADAS 2” using CONSULT.

Is DTC “U214F-57” detected with DTC “U2175-57” (with around view monitor control unit), “U2176-57”, “U2440-57”, “U244F-57”, “U2465-57” (with sonar system) and “U2476-57” at the same time?

YES (all DTC codes are detected at the same time)>>

Replace the ADAS control unit 2. Refer to Removal and Installation.

NO (all DTC codes are not detected at the same time)>>

Refer to Trouble Diagnosis Flow Chart .

U2150-87 Can Comm Circuit Nissan Pathfinder Fifth generation

DTC Description

CAN COMMUNICATION

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 units, 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-H, CAN-L) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads the required data only.

CAN communication signal chart. Refer to Trouble Diagnosis Flow Chart.

DTC DETECTION LOGIC

DTC		CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
U2150	87	CAN comm err (AIRBAG) [Controller area network communication error (Airbag)]	Diagnosis condition	When engine is running
			Signal (terminal)	CAN communication signal
			Threshold	If ADAS control unit 2 is not transmitting or receiving CAN communication signal
			Diagnosis delay time	2 seconds or more

NOTE:

If “U2150-87” is detected, first diagnose the CAN communication system.

POSSIBLE CAUSE

CAN communication system

FAIL-SAFE

None

CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

1. Start the engine.

2. Perform “All DTC Reading” with CONSULT.

3. Check if the “U2150-87” is detected as the current malfunction in “Self Diagnostic Result” of “ICC/ADAS 2”.

Is “U2150-87” detected as the current malfunction?

YES>>

Refer to DTC Diagnosis Procedure.

NO-1>>

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

NO-2>>

Confirmation after repair: INSPECTION END

DTC Diagnosis Procedure

PERFORM THE SELF-DIAGNOSIS

1. Turn the ignition switch ON.

2. Perform “All DTC Reading” with CONSULT.

3. Check if the “U2150-87” is detected as the current malfunction in “Self Diagnostic Result” of “ICC/ADAS 2”.

Is “U2150-87” detected as the current malfunction?

YES>>

Refer to Trouble Diagnosis Flow Chart.

NO>>

INSPECTION END

U2752-88 Ethernet Circuit Nissan Pathfinder 5th Gen

DTC Description

DTC DETECTION LOGIC

DTC		CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
U2752	88	Ethernet circuit (Ethernet circuit)	Diagnosis condition	When engine is running
			Signal (terminal)	Ethernet
			Threshold	If ADAS control unit 2 is not receiving ethernet communication signal from distance sensor
			Diagnosis delay time	5 seconds or more

POSSIBLE CAUSE

• Ethernet harness

• ADAS control unit 2

• Distance sensor

FAIL-SAFE

The following systems are canceled.

• Vehicle-to-vehicle distance control mode

• Conventional (fixed speed) cruise control mode

• Steering wheel assistance function

• AEB

• RAB

• I-FCW

• LDW

• I-LI

• I-BSI

• TSR

• I-DA

CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

1. Start the engine and wait at least 5 seconds.

2. Perform “All DTC Reading” with CONSULT.

3. Check if the DTC “U2752-88” is detected as the current malfunction in “Self Diagnostic Result” of “ICC/ADAS 2”.

Is DTC “U2752-88” detected as the current malfunction?

YES>>

Refer to DTC Diagnosis Procedure.

NO-1>>

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

NO-2>>

Confirmation after repair: INSPECTION END

DTC Diagnosis Procedure

CAUTION:

If the DTC has been detected due to a past malfunction, be sure to perform confirmation procedure, as this may lead to incorrect replacement of parts.

Refer to Diagnosis Procedure.

CHECK CONNECTOR

1. Ignition switch OFF.

2. Check the ethernet harness connectors and terminals of ADAS control unit 2 and distance sensor for damage or looseness.

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Check or repair ethernet harness connectors or terminals. GO TO 2.

PERFORM ALL DTC READING-1

1. Ignition switch OFF, and then ON.

2. Perform “All DTC Reading” with CONSULT.

3. Check the "Self Diagnostic Result" of "ICC/ADAS 2" and “LASER/RADAR”.

Is DTC "U2752-88" or "U275F-88" detected as the current malfunction?

YES>>

GO TO 3.

NO>>

INSPECTION END

CHECK ADAS CONTROL UNIT 2 AND DISTANCE SENSOR SELF DIAGNOSTIC RESULT

Check the "Self Diagnostic Result" of "ICC/ADAS 2" and “LASER/RADAR”.

Is only "U2752-88" detected as the current malfunction? (Is U275F-88 not detected in "Self Diagnostic Result" of "LASER/RADAR"?)

YES>>

Check or repair the distance sensor power supply and ground circuit. Refer to Diagnosis Procedure. GO TO 4.

NO>>

GO TO 5.

PERFORM ALL DTC READING-2

1. Ignition switch OFF, and then ON.

2. Perform "All DTC Reading" with CONSULT.

3. Check the "Self Diagnostic Result" of "ICC/ADAS 2" and “LASER/RADAR”.

Is DTC "U2752-88" or "U275F-88" detected as the current malfunction?

YES>>

GO TO 5.

NO>>

INSPECTION END

CHECK ADAS CONTROL UNIT 2 AND FRONT CAMERA UNIT SELF DIAGNOSTIC RESULT

Check the "Self Diagnostic Result" of "ICC/ADAS 2" and “LANE CAMERA”.

NOTE:

Check the scope of the impact based on the detection status of ADAS-related Ethernet communication abnormality and identify the ECU replacement target.

Is "U2852-88" or "U276B-88" detected as the current malfunction at the same time as "U2752-88"?

YES>>

Replace the ADAS control unit 2. Refer to Removal and Installation. GO TO 6.

NO>>

Replace the distance sensor. Refer to Removal and Installation. GO TO 7.

PERFORM ALL DTC READING-3

1. Erase the “self-diagnosis results”.

2. Ignition switch OFF, then ON.

3. Perform "All DTC Reading" with CONSULT.

4. Check the "Self Diagnostic Result" of "ICC/ADAS 2" and “LASER/RADAR”.

Is DTC "U2752-88" or "U275F-88" detected as the current malfunction?

YES>>

Replace the distance sensor. Refer to Removal and Installation. GO TO 8.

NO>>

INSPECTION END

PERFORM ALL DTC READING-4

1. Erase the “self-diagnosis results”.

2. Ignition switch OFF, and then ON.

3. Perform "All DTC Reading" with CONSULT.

4. Check the "Self Diagnostic Result" of "ICC/ADAS 2" and “LASER/RADAR”.

Is DTC "U2752-88" or "U275F-88" detected as the current malfunction?

YES>>

Replace the ADAS control unit 2. Refer to Removal and Installation. GO TO 8.

NO>>

INSPECTION END

PERFORM ALL DTC READING-5

1. Erase the “self-diagnosis results”.

2. Ignition switch OFF, and then ON.

3. Perform "All DTC Reading" with CONSULT.

4. Check the "Self Diagnostic Result" of "ICC/ADAS 2" and “LASER/RADAR”.

Is DTC "U2752-88" or "U275F-88" detected as the current malfunction?

YES>>

Replace the ethernet harness between ADAS control unit 2 and distance sensor.

NO>>

INSPECTION END

Power Supply and Ground Circuit Nissan Pathfinder 5th Gen

Diagnosis Procedure

CHECK FUSE

Check that the following fuse is not blown:

Signal name	Fuse No.
Ignition power supply	40 (10 A)

Is the fuse blown?

YES>>

Replace the blown fuse after repairing the affected circuit.

NO>>

GO TO 2.

CHECK ADAS CONTROL UNIT 2 POWER SUPPLY CIRCUIT

Check voltage between ADAS control unit 2 harness connector and ground.

Terminal			Condition	Voltage (Approx.)
(+)		(–)
ADAS control unit 2		Ground	Ignition switch
Connector	Terminal
M192	20		OFF	0 V
			ON	Battery voltage

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair the ADAS control unit 2 power supply circuit.

CHECK ADAS CONTROL UNIT 2 GROUND CIRCUIT

1. Turn the ignition switch OFF.

2. Disconnect the ADAS control unit 2 harness connector.

3. Check for continuity between ADAS control unit 2 harness connector and ground.

   ADAS control unit 2		Ground	Continuity
   Connector	Terminal
   M192	30		Yes

Is the inspection result normal?

YES>>

Inspection End.

NO>>

Repair the ADAS control unit 2 ground circuit.