Nissan Pathfinder: Door & Lock - Power Supply and Ground Circuit

• Front Door Lock
• Automatic Back Door Control Unit
• Intelligent Key Unit
• Hands Free Sensor Control Unit

Front Door Lock Nissan Pathfinder Fifth generation

Diagnosis Procedure

CHECK FUSE

Check that the following fuse is not blown (open).

Signal name	Fuse No.	Capacity
Front door lock actuator power supply	12	10 A

Is the fuse blown (open)?

YES>>

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

NO>>

GO TO 2.

CHECK POWER SUPPLY CIRCUIT

1. Ignition switch OFF.

2. Disconnect BCM connector.

3. Check voltage between BCM harness connector and ground.

   (+)		(−)	Voltage (Approx.)
   BCM
   Connector	Terminal
   M81	135	Ground	Battery voltage

Is the measurement value normal?

YES>>

GO TO 3.

NO>>

Repair or replace harness.

CHECK GROUND CIRCUIT

Check continuity between BCM harness connector and ground.

BCM		(-)	Continuity
Connector	Terminal
M81	129	Ground	Yes
	137

Is the inspection result normal?

YES>>

Inspection End.

NO>>

Repair or replace harness.

Automatic Back Door Control Unit Nissan Pathfinder SUV

Diagnosis Procedure

CHECK FUSIBLE LINK

Check that the following fusible link is not blown (open).

Signal name	Fusible link No.	Capacity
Battery power supply	DD	30 A

Is the fusible link blown (open)?

YES>>

Replace the blown (open) fusible link after repairing the affected circuit if a fusible link is blown (open).

NO>>

GO TO 2.

CHECK POWER SUPPLY CIRCUIT

1. Ignition switch OFF.

2. Disconnect automatic back door control unit connector.

3. Check voltage between automatic back door control unit harness connector and ground.

   (+)		(−)	Voltage (Approx.)
   Automatic back door control unit
   Connector	Terminal
   B56	37	Ground	Battery voltage

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair or replace harness.

CHECK GROUND CIRCUIT

Check continuity between automatic back door control unit harness connector and ground.

Automatic back door control unit		(-)	Continuity
Connector	Terminal
B56	42	Ground	Yes

Is the inspection result normal?

YES>>

Inspection End.

NO>>

Repair or replace harness.

Intelligent Key Unit Nissan Pathfinder Fifth generation

Diagnosis Procedure

CHECK FUSE

Check that the following fuse is not blown (open).

Signal name	Fuse No.	Capacity
Battery power supply	13	5 A

Is the fuse blown (open)?

YES>>

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

NO>>

GO TO 2.

CHECK POWER SUPPLY CIRCUIT

1. Ignition switch OFF.

2. Disconnect Intelligent Key unit connector.

3. Check voltage between Intelligent Key unit harness connector and ground.

   (+)		(−)	Voltage (Approx.)
   Intelligent Key unit
   Connector	Terminal
   M38	1	Ground	Battery voltage

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair or replace harness.

CHECK GROUND CIRCUIT

Check continuity between Intelligent Key unit harness connector and ground.

Intelligent Key unit		(-)	Continuity
Connector	Terminal
M38	29	Ground	Yes

Is the inspection result normal?

YES>>

Inspection End.

NO>>

Repair or replace harness.

Hands Free Sensor Control Unit Nissan Pathfinder 2025

Diagnosis Procedure

CHECK FUSE

Check that the following fuse is not blown (open).

Signal name	Fuse No.	Capacity
Battery power supply	26	5 A

Is the fuse blown (open)?

YES>>

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

NO>>

GO TO 2.

CHECK POWER SUPPLY CIRCUIT

1. Ignition switch OFF.

2. Disconnect hands free sensor control unit connector.

3. Check voltage between hands free sensor control unit harness connector and ground.

   (+)		(−)	Voltage (Approx.)
   Hands free sensor control unit
   Connector	Terminal
   B459	2	Ground	Battery voltage

Is the measurement value normal?

YES>>

GO TO 3.

NO>>

Repair or replace harness.

CHECK GROUND CIRCUIT

Check continuity between hands free sensor control unit harness connector and ground.

Hands free sensor control unit		(-)	Continuity
Connector	Terminal
B459	3	Ground	Yes

Is the inspection result normal?

YES>>

Inspection End.

NO>>

Repair or replace harness.