Nissan Pathfinder: Heater & Air Conditioning System - Cooler Pipe and Hose

Nissan Pathfinder (R53) 2022-2025 Service Manual / Ventilation, Heater & Air Conditioner :: Heater & Air Conditioning System / Removal and Installation / Cooler Pipe and Hose

Exploded View

1.	High-pressure pipe	2.	High-pressure service port	3.	O-ring
4.	Condenser	5.	Refrigerant pressure sensor	6.	High-pressure flexible hose
7.	Compressor	8.	High-pressure and low-pressure pipe	9.	Low-pressure service port
10.	Low-pressure flexible hose		Front

High-Pressure and Low-Pressure Pipe
Low-Pressure Flexible Hose
High-Pressure Pipe
High-Pressure Flexible Hose
Underfloor Rear High-Pressure and Low-Pressure A/c Pipes

High-Pressure and Low-Pressure Pipe Nissan Pathfinder 2025

Removal and Installation

REMOVAL

Discharge refrigerant. Refer to Recycle Refrigerant.

Remove front under cover. Refer to Removal and Installation.

Remove bolt (B), then disconnect high-pressure and low-pressure pipe (1) from underfloor rear high-pressure and low-pressure A/C pipes (2).

CAUTION:

Cap or wrap the joint of the pipe with suitable material such as vinyl tape to avoid the entry of air.

Remove core support cover. Refer to Exploded View.

Remove cowl top extension. Refer to Exploded View.

Remove nut (A), then disconnect high-pressure and low-pressure pipe (1) from expansion valve (2).

CAUTION:

Cap or wrap the joint of the pipe with suitable material such as vinyl tape to avoid the entry of air.

Remove bolt (A), then disconnect high-pressure and low-pressure pipe (2) from high-pressure pipe (1) and low-pressure flexible hose (3).

CAUTION:

Cap or wrap the joint of the pipe with suitable material such as vinyl tape to avoid the entry of air.

Remove nut (A), then release high-pressure and low-pressure pipe bracket.

Remove high-pressure and low-pressure pipe.

INSTALLATION

Installation is in the reverse order of removal.

CAUTION:

Do not reuse O-rings.

Apply A/C oil to the O-rings of the high-pressure and low-pressure pipe for installation.

After charging refrigerant, check for leaks. Refer to Leak Test.

Low-Pressure Flexible Hose Nissan Pathfinder SUV

Removal and Installation

REMOVAL

Discharge refrigerant. Refer to Recycle Refrigerant.

Remove front under cover. Refer to Removal and Installation.

Remove bolt (A), then disconnect high-pressure and low-pressure pipe (2) from low-pressure flexible hose (3).

CAUTION:

Cap or wrap the joint of the pipe with suitable material such as vinyl tape to avoid the entry of air.

(1)	: High-pressure pipe

Remove bolt (A), then disconnect low-pressure flexible hose (1) from compressor.

CAUTION:

Cap or wrap the joint of the pipe with suitable material such as vinyl tape to avoid the entry of air.

(2)	: High-pressure flexible hose
(B)	: Bolt

Remove low-pressure flexible hose.

INSTALLATION

Installation is in the reverse order of removal.

CAUTION:

Do not reuse O-rings.

Apply A/C oil to the O-rings of the low-pressure flexible hose for installation.

After charging refrigerant, check for leaks. Refer to Leak Test.

High-Pressure Pipe Nissan Pathfinder SUV

Removal and Installation

REMOVAL

Discharge refrigerant. Refer to Recycle Refrigerant.

Remove bolt (A), then disconnect high-pressure pipe (1) from high-pressure and low-pressure pipe (2).

CAUTION:

Cap or wrap the joint of the pipe with suitable material such as vinyl tape to avoid the entry of air.

(3)	: Low-pressure flexible hose

Remove bolt (B), then disconnect high-pressure pipe (2) from condenser pipe assembly (3).

CAUTION:

Cap or wrap the joint of the pipe with suitable material such as vinyl tape to avoid the entry of air.

(1)	: High-pressure flexible hose
(A)	: Bolt
	: Front

Remove high-pressure pipe.

INSTALLATION

Installation is in the reverse order of removal.

CAUTION:

Do not reuse O-rings.

Apply A/C oil to the O-rings of the high-pressure pipe for installation.

After charging the refrigerant, check for leaks. Refer to Leak Test.

High-Pressure Flexible Hose Nissan Pathfinder 2022

Removal and Installation

REMOVAL

Discharge refrigerant. Refer to Recycle Refrigerant.

Remove front under cover. Refer to Removal and Installation.

Remove bolt (A), then disconnect high-pressure flexible hose (1) from condenser pipe assembly (3).

CAUTION:

Cap or wrap the joint of the pipe with suitable material such as vinyl tape to avoid the entry of air.

(2)	: High-pressure pipe
(B)	: Bolt
	: Front

Remove bolt (B), then disconnect high-pressure flexible hose (2) from compressor.

CAUTION:

Cap or wrap the joint of the pipe with suitable material such as vinyl tape to avoid the entry of air.

(1)	: Low-pressure flexible hose
(A)	: Bolt

Remove high-pressure flexible hose.

INSTALLATION

Installation is in the reverse order of removal.

CAUTION:

Do not reuse O-rings.

Apply A/C oil to the O-rings of the high-pressure flexible hose for installation.

After charging the refrigerant, check for leaks. Refer to Leak Test.

Underfloor Rear High-Pressure and Low-Pressure A/c Pipes Nissan Pathfinder 5th Gen

Exploded View

1.	Rear heating and cooling unit assembly	2.	Underfloor rear high-pressure and low-pressure A/C pipes assembly	3.	O-ring
4.	Underfloor rear high-pressure and low-pressure A/C pipes	5.	High-pressure and low-pressure pipe	6.	Front blower unit
7.	Front heating and cooling unit assembly		Front

Removal and Installation

REMOVAL

Discharge refrigerant. Refer to Recycle Refrigerant.

Drain engine coolant. Refer to Draining.

Remove bolt (B), then disconnect high-pressure and low-pressure pipe (1) from underfloor rear high-pressure and low-pressure A/C pipes (2).

CAUTION:

Cap or wrap the joint of the pipe with suitable material such as vinyl tape to avoid the entry of air.

(A)	: Front heater hoses

Disconnect front heater hoses (A) from underfloor rear high-pressure and low-pressure A/C pipes (2).

CAUTION:

Cap or wrap the joint of the pipe with suitable material such as vinyl tape to avoid the entry of air.

(1)	: High-pressure and low-pressure pipe
(B)	: Bolt

Remove bolt (C), then disconnect underfloor rear high-pressure and low-pressure A/C pipes (1) from the rear expansion valve.

CAUTION:

Cap or wrap the joint of the pipe with suitable material such as vinyl tape to avoid the entry of air.

(A)	: Clips
(B)	: Rear heater hoses

Release clips (A), then disconnect rear heater hoses (B) from rear heating and cooling unit assembly.

(1)	: Underfloor rear high-pressure and low-pressure A/C pipes
(C)	: Bolt

Remove body under cover (1).

Lower rear suspension member to allow room for removal of underfloor rear high-pressure and low-pressure A/C pipes. Refer to Removal and Installation.

Remove underfloor rear high-pressure and low-pressure A/C pipes bracket bolts. Refer to Exploded View.

Remove underfloor rear high-pressure and low-pressure A/C pipes.

INSTALLATION

Installation is in the reverse order of removal.

CAUTION:

Do not reuse O-rings.

Apply A/C oil to new O-rings for installation.

After charging refrigerant, check for leaks. Refer to Leak Test.