Nissan Pathfinder: Driveline - Dtc/circuit Diagnosis

• C1201-46 Controller
• C1201-4b Controller
• C1203-86 Abs System
• C1210-97 Engine Signal
• C1213-A2 Battery Voltage
• C1215-12 Oil Temperature Sensor
• C1220-54 Incomplete Air Bleeding
• U3d02-06 Incomplete Programming
• Power Supply and Ground Circuit
• Awd Warning Icon/display
• Transfer Oil Temperature Sensor

C1201-46 Controller Nissan Pathfinder Fifth generation

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
C1201-46	CONTROLLER (Controller)	Diagnosis condition	When ignition switch is ON.
		Signal (terminal)	—
		Threshold	Malfunction has occurred inside 4WD control unit
		Diagnosis delay time	1 seconds or less

POSSIBLE CAUSE

Internal malfunction of 4WD control unit

FAIL-SAFE

Although 4WD control is canceled, the vehicle can drive at 2WD condition.

DTC Confirmation Procedure

PRECONDITIONING

If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always place ignition switch OFF and wait at least 10 seconds before conducting the next test.

>>

GO TO 2.

DTC REPRODUCTION PROCEDURE

CONSULT

1. Ignition switch ON.

2. Wait for 15 seconds or more.

3. Select "Self Diagnostic Result" mode of “ALL MODE AWD/4WD”.

Is DTC “C1201-46” detected?

YES>>

Proceed to diagnosis procedure: 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 SELF-DIAGNOSIS

CONSULT

1. Erase self-diagnostic results for “ALL MODE AWD/4WD”.

2. Ignition switch OFF, and wait for 10 seconds or more.

3. Ignition switch ON, and wait for 15 seconds or more.

4. Select "Self Diagnostic Result" mode of “ALL MODE AWD/4WD”.

Which DTC is detected?

Including other DTC>>

Perform the trouble diagnosis for detected other DTC. Refer to DTC Index.

C1201-46 only>>

GO TO 2.

CHECK TERMINALS AND HARNESS CONNECTORS

Check 4WD control unit pin terminals for damage or loose connection with harness connector.

Is inspection result normal?

YES>>

After ignition switch OFF, perform DTC confirmation procedure again. If DTC “C1201-46” is detected, replace actuator assembly due to the malfunction of the 4WD control unit. Refer to Removal and Installation.

NO>>

Repair or replace malfunctioning parts.

C1201-4b Controller Nissan Pathfinder Fifth generation

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
C1201-4B	CONTROLLER (Controller)	Diagnosis condition	When ignition switch is ON.
		Signal (terminal)	—
		Threshold	4WD control unit temperature value is too high
		Diagnosis delay time	5 seconds or more

POSSIBLE CAUSE

Internal malfunction of 4WD control unit

FAIL-SAFE

Although 4WD control is canceled, the vehicle can drive at 2WD condition.

DTC Confirmation Procedure

PRECONDITIONING

If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always place ignition switch OFF and wait at least 10 seconds before conducting the next test.

>>

GO TO 2.

DTC REPRODUCTION PROCEDURE

CONSULT

1. Ignition switch ON.

2. Drive at 6 MPH (10 km/h) or more for approximately 5 minutes in urban areas.

3. Stop the Nissan Pathfinder vehicle.

4. Select "Self Diagnostic Result" mode of “ALL MODE AWD/4WD”.

Is DTC “C1201-4B” detected?

YES>>

Proceed to diagnosis procedure: Refer toDTC Diagnosis Procedure.

NO>>

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

NO>>

Confirmation after repair: Inspection End.

DTC Diagnosis Procedure

PERFORM SELF-DIAGNOSIS

CONSULT

1. Erase self diagnostic results for “ALL MODE AWD/4WD”.

2. Ignition switch OFF, and wait for 10 seconds or more.

3. Ignition switch ON, and wait for 15 seconds or more.

4. Select "Self Diagnostic Result" mode of “ALL MODE AWD/4WD”.

Is DTC “C1201-4B” detected?

YES>>

Replace actuator assembly due to the malfunction of the 4WD control unit. Refer to Removal and Installation.

NO>>

Inspection End.

C1203-86 Abs System Nissan Pathfinder

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
C1203-86	ABS SYSTEM (ABS system)	Diagnosis condition	With ignition switch ON and Nissan Pathfinder vehicle running.
		Signal (terminal)	Wheel speed signals
		Threshold	4WD control unit cannot receive the wheel speed signal.
		Diagnosis delay time	2 seconds or more

POSSIBLE CAUSE

ABS malfunction (wheel speed signal error)

FAIL-SAFE

Although 4WD control is canceled, the vehicle can drive at 2WD condition.

DTC Confirmation Procedure

PRECONDITIONING

If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always place ignition switch OFF and wait at least 10 seconds before conducting the next test.

>>

GO TO 2.

DTC REPRODUCTION PROCEDURE

CONSULT

1. Ignition switch ON.

2. Drive at 6 MPH (10 km/h) or more for approximately 5 minutes in urban areas.

3. Stop the Nissan Pathfinder vehicle.

4. Select "Self Diagnostic Result" mode of “ALL MODE AWD/4WD”.

Is DTC “C1203-86” detected?

YES>>

Proceed to diagnosis procedure: 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 SELF-DIAGNOSIS OF ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)

CONSULT

Select "Self Diagnostic Result" mode of “ABS”.

Is any DTC detected?

YES>>

Check the DTC. Refer to DTC Index.

NO>>

GO TO 2.

CHECK TERMINALS AND HARNESS CONNECTORS

Check 4WD control unit pin terminals for damage or loose connection with harness connector.

Is inspection result normal?

YES>>

After ignition switch OFF, perform DTC confirmation procedure again. If DTC “C1203–86” is detected, replace actuator assembly due to the malfunction of the 4WD control unit. Refer to Removal and Installation.

NO>>

Repair or replace malfunctioning parts.

C1210-97 Engine Signal Nissan Pathfinder Fifth generation

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
C1210-97	ENGINE SIGNAL (Engine signal)	Diagnosis condition	When ignition switch is ON and engine is running.
		Signal (terminal)	Torque down impossible signal
		Threshold	Detected the signal malfunction related protection for 4WD system.
		Diagnosis delay time	2 seconds or more

POSSIBLE CAUSE

The signal error related to 4WD system protection

FAIL-SAFE

Although 4WD control is canceled, the vehicle can drive at 2WD condition.

DTC Confirmation Procedure

PRECONDITIONING

If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always place ignition switch OFF and wait at least 10 seconds before conducting the next test.

>>

GO TO 2.

DTC REPRODUCTION PROCEDURE

CONSULT

1. Ignition switch ON.

2. Drive at 6 MPH (10 km/h) or more for approximately 5 minutes in urban areas.

3. Stop the Nissan Pathfinder vehicle.

4. Select "Self Diagnostic Result" mode of “ALL MODE AWD/4WD”.

Is DTC “C1210-97” detected?

YES>>

Proceed to diagnosis procedure: 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 SELF-DIAGNOSIS OF 4WD CONTROL UNIT

CONSULT

1. Erase self-diagnostic results for “ALL MODE AWD/4WD”.

2. Start the engine, and wait for 15 seconds or more.

3. Stop the engine.

4. Select "Self Diagnostic Result" mode of “ALL MODE AWD/4WD”.

Which DTC is detected?

C1210-97>>

GO TO 2.

Except C1210-97>>

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

No DTC>>

Inspection End.

PERFORM SELF-DIAGNOSIS OF ECM

CONSULT

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

Is any DTC detected?

YES>>

Check the DTC. Refer to DTC Index.

NO>>

GO TO 3.

PERFORM SELF-DIAGNOSIS OF TCM

CONSULT

Select "Self Diagnostic Result" mode of “TRANSMISSION”.

Is any DTC detected?

YES>>

Check the DTC. Refer to DTC Index.

NO>>

GO TO 4.

CHECK TERMINALS AND HARNESS CONNECTORS

Check 4WD control unit pin terminals for damage or loose connection with harness connector.

Is inspection result normal?

YES>>

After ignition switch OFF, perform DTC confirmation procedure again. If DTC “C1210-97” is detected, replace actuator assembly due to the malfunction of the 4WD control unit. Refer to Removal and Installation.

NO>>

Repair or replace malfunctioning parts.

C1213-A2 Battery Voltage Nissan Pathfinder 2025

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
C1213-A2	BATTERY VOLTAGE (Battery voltage)	Diagnosis condition	When ignition switch is ON>
		Signal (terminal)	Battery power supply signal (terminal #6)
		Threshold	Battery power supply signal < 9 V
		Diagnosis delay time	15 seconds or more

POSSIBLE CAUSE

The power supply in the system is too low.

FAIL-SAFE

Although 4WD control is canceled, the vehicle can drive at 2WD condition.

DTC Confirmation Procedure

PRECONDITIONING

If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always place ignition switch OFF and wait at least 10 seconds before conducting the next test.

>>

GO TO 2.

DTC REPRODUCTION PROCEDURE

CONSULT

1. Ignition switch ON.

2. Drive at 6 MPH (10 km/h) or more for approximately 5 minutes in urban areas.

3. Stop the Nissan Pathfinder vehicle.

4. Select "Self Diagnostic Result" mode of “ALL MODE AWD/4WD”.

Is DTC “C1213-A2” detected?

YES>>

Proceed to diagnosis procedure: 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 POWER SUPPLY AND GROUND CIRCUIT

Perform the trouble diagnosis of the power supply and ground circuit. Refer to Diagnosis Procedure.

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Repair or replace error-detected parts.

CHECK TERMINALS AND HARNESS CONNECTORS

Check 4WD control unit pin terminals for damage or loose connection with harness connector.

Is the inspection result normal?

YES>>

After ignition switch OFF, perform DTC confirmation procedure again. If DTC “C1213-A2” is detected, replace actuator assembly due to the malfunction of the 4WD control unit. Refer to Removal and Installation.

NO>>

Repair or replace malfunctioning parts.

C1215-12 Oil Temperature Sensor Nissan Pathfinder Fifth generation

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
C1215-12	OIL TEMPERATURE SENSOR (Oil temperature sensor)	Diagnosis condition	When ignition switch is on and engine is running.
		Signal (terminal)	Transfer oil temperature signal (terminal #2)
		Threshold	Transfer oil temperature value is too high
		Diagnosis delay time	—

POSSIBLE CAUSE

• Malfunction of transfer oil temperature sensor

• Transfer oil temperature sensor circuit. (Sensor circuit is shorted)

FAIL-SAFE

Although 4WD control is canceled, the vehicle can drive at 2WD condition.

DTC Confirmation Procedure

PRECONDITIONING

If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always place ignition switch OFF and wait at least 10 seconds before conducting the next test.

>>

GO TO 2.

DTC REPRODUCTION PROCEDURE

CONSULT

1. Ignition switch ON.

2. Drive at 6 MPH (10 km/h) or more for approximately 5 minutes in urban areas.

3. Stop the Nissan Pathfinder vehicle.

4. Select "Self Diagnostic Result" mode of “ALL MODE AWD/4WD”.

Is DTC “C1215-12” detected?

YES>>

Proceed to diagnosis procedure: 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 TRANSFER OIL TEMPERATURE SENSOR GROUND CIRCUIT

1. Ignition switch OFF.

2. Disconnect transfer oil temperature sensor harness connector.

3. Check the continuity between transfer oil temperature sensor harness connector and ground.

   Transfer oil temperature sensor		—	Continuity
   Connector	Terminal
   F2	2	Ground	Yes

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Repair or replace malfunctioning parts.

CHECK TRANSFER OIL TEMPERATURE SENSOR SIGNAL CIRCUIT

1. Disconnect 4WD control unit harness connector.

2. Check the continuity between 4WD control unit harness connector and transfer oil temperature sensor harness connector.

   4WD control unit		Transfer oil temperature sensor		Continuity
   Connector	Terminal	Connector	Terminal
   C1	2	F2	1	Yes

3. Check the continuity between 4WD control unit harness connector and ground.

   4WD control unit		—	Continuity
   Connector	Terminal
   C1	2	Ground	No

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair or replace malfunctioning parts.

CHECK TRANSFER OIL TEMPERATURE SENSOR SIGNAL

1. Connect 4WD control unit harness connector.

2. Ignition switch ON.

   CAUTION:

   Never start the engine.

3. Check the voltage between transfer oil temperature sensor harness connector and ground.

(+)		(–)	Voltage (Approx.)
Transfer oil temperature sensor
Connector	Terminal
F2	2	Ground	4.75 – 5.25 V

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Repair or replace malfunctioning parts.

CHECK TRANSFER OIL TEMPERATURE SENSOR

Check transfer oil temperature sensor. Refer to Component Inspection.

Is the inspection result normal?

YES>>

GO TO 5.

NO>>

Replace transfer oil temperature sensor. Refer to Removal and Installation.

CHECK TERMINALS AND HARNESS CONNECTORS

• Check 4WD control unit pin terminals for damage or loose connection with harness connector.

• Check transfer oil temperature sensor pin terminals for damage or loose connection with harness connector.

Is the inspection result normal?

YES>>

After ignition switch OFF, perform DTC confirmation procedure again. If DTC “C1215-12” is detected, replace the 4WD control unit. Refer to Removal and Installation.

NO>>

Repair or replace malfunctioning parts.

C1220-54 Incomplete Air Bleeding Nissan Pathfinder 5th Gen

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
C1220-54	INCOMP AIR BLEEDING (Incomplete air bleeding)	Diagnosis condition	When ignition switch is ON.
		Signal (terminal)	—
		Threshold	Air bleeding of electro-hydraulic coupling oil was incomplete
		Diagnosis delay time	—

POSSIBLE CAUSE

• Incomplete air bleeding of electro-hydraulic coupling oil

• Electro-hydraulic coupling

FAIL-SAFE

Although 4WD control is canceled, the vehicle can drive at 2WD condition.

DTC Confirmation Procedure

PRECONDITIONING

If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always place ignition switch OFF and wait at least 10 seconds before conducting the next test.

>>

GO TO 2.

DTC REPRODUCTION PROCEDURE

CONSULT

1. Erase self-diagnostic results for “ALL MODE AWD/4WD”.

2. Ignition switch OFF, and wait for 10 seconds or more.

3. Ignition switch ON, and wait for 15 seconds or more.

4. Select "Self Diagnostic Result" mode of “ALL MODE AWD/4WD”.

Is DTC “C1220-54” detected?

YES>>

Proceed to diagnosis procedure: 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 SELF-DIAGNOSIS

CONSULT

1. Perform air bleeding and initialize oil deterioration level. Refer to Description.

2. Ignition switch OFF.

3. Perform the “DTC CONFIRMATION PROCEDURE”. Refer to DTC Description.

Is DTC “C1220-54” detected?

YES>>

Replace electro-hydraulic coupling assembly. Refer to Removal and Installation.

NO>>

Inspection End.

U3d02-06 Incomplete Programming Nissan Pathfinder R53

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
U3D02-06	INCOMP PROGRAMMING (Incomplete programming)	Diagnosis condition	When ignition switch is ON.
		Signal (terminal)	—
		Threshold	When programming to 4WD control unit is not complete.
		Diagnosis delay time	—

POSSIBLE CAUSE

• Incomplete programming of 4WD control unit

• 4WD control unit

FAIL-SAFE

Although 4WD control is canceled, the vehicle can drive at 2WD condition.

DTC Confirmation Procedure

PRECONDITIONING

If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always place ignition switch OFF and wait at least 10 seconds before conducting the next test.

>>

GO TO 2.

DTC REPRODUCTION PROCEDURE

CONSULT

1. Ignition switch ON.

2. Wait for 15 seconds or more.

3. Select "Self Diagnostic Result" mode of “ALL MODE AWD/4WD”.

Is DTC “U3D02-06” detected?

YES>>

Proceed to diagnosis procedure: 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 4WD CONTROL UNIT PROGRAMMING

CONSULT

1. Erase "Self Diagnostic Result" of “ALL MODE AWD/4WD”.

2. Perform 4WD control unit programming. Refer to Description.

   • Suppose the 4WD control unit has been replaced.

3. Ignition switch OFF.

4. Perform the “DTC CONFIRMATION PROCEDURE”. Refer to DTC Confirmation Procedure.

Is DTC “U3D02-06” detected?

YES>>

GO TO 2.

NO>>

Inspection End.

CHECK TERMINALS AND HARNESS CONNECTORS

Check 4WD control unit pin terminals for damage or loose connection with harness connector.

Is inspection result normal?

YES>>

After ignition switch OFF, perform DTC confirmation procedure again. If DTC “U3D02-06” is detected, replace actuator assembly due to the malfunction of the 4WD control unit. Refer to Removal and Installation.

NO>>

Repair or replace malfunctioning parts.

Power Supply and Ground Circuit Nissan Pathfinder 2022

Diagnosis Procedure

CHECK FUSES

Check that the following fuses are not blown:

Unit	Power source	Fuse No.	Capacity
4WD control unit	Battery	22	20 A
	Ignition switch ON or START	9	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. Disconnect 4WD control unit harness connector.

2. Check voltage between 4WD control unit harness connector and ground.

   (+)		(–)	Ignition switch position
   4WD control unit
   Connector	Terminal		OFF	ON	START
   C1	6	Ground	Battery voltage	Battery voltage	Battery voltage
   	5		0 V	Battery voltage	Battery voltage

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair or replace harness or connector.

CHECK GROUND CIRCUIT

1. Ignition switch OFF.

2. Check continuity between 4WD control unit harness connector and ground.

   4WD control unit		—	Continuity
   Connector	Terminal
   C1	1	Ground	Yes

Is the inspection result normal?

YES>>

Inspection End.

NO>>

Repair or replace harness or connector.

Awd Warning Icon/display Nissan Pathfinder SUV

Diagnosis Procedure

CHECK POWER SUPPLY AND GROUND CIRCUIT

Perform the trouble diagnosis for power supply and ground circuit. Refer to Diagnosis Procedure.

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Repair or replace the error-detected parts.

PERFORM SELF DIAGNOSTIC RESULT (4WD CONTROL UNIT)

CONSULT

Select “Self Diagnostic Result” mode of “ALL MODE AWD/4WD”.

Is any detected?

YES>>

Check the DTC. Refer to DTC Index.

NO>>

GO TO 3.

PERFORM SELF DIAGNOSTIC RESULT (COMBINATION METER)

CONSULT

Select “Self Diagnostic Result” mode of “METER/M&A”.

Is any detected?

YES>>

Check the DTC. Refer to DTC Index (Full TFT Meter) or DTC Index (7 Inch Information Display).

NO>>

Perform the trouble diagnosis for combination meter power supply circuit. Refer to Diagnosis Procedure (Full TFT Meter) or Diagnosis Procedure (7 Inch Information Display).

Transfer Oil Temperature Sensor Nissan Pathfinder 2022

Component Inspection

CHECK TRANSFER OIL TEMPERATURE SENSOR

1. Ignition switch OFF.

2. Remove transfer oil temperature sensor. Refer to Exploded View.

3. Check the resistance between transfer oil temperature sensor connector terminals.

   • Make measuring condition using burning hot water.

   CAUTION:

   • Prevent a burn from the burning hot water.

   • Be sure to dry the sensor after checking.

   Transfer oil temperature sensor		Condition	Resistance (Approx.)
   Terminals
   1	2	212°F (100°C)	5.563 – 6.997 kΩ

Is the inspection result normal?

YES>>

Inspection End.

NO>>

Replace transfer oil temperature sensor. Refer to Exploded View.