Infiniti QX56 (JA60). Manual - part 584

HIGH-PRESSURE PIPE

HA-41

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HIGH-PRESSURE PIPE

Removal and Installation for High-Pressure Pipe

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REMOVAL

1. Remove the cowl top extension. Refer to 

EXT-18, "Removal and Installation"

. 

2. Disconnect the battery negative terminal and positive battery terminal.
3. Reposition the IPDM E/R aside.
4. Remove the front right wheel and tire assembly. Refer to 

WT-49, "Rotation"

.

5. Position aside the front floor insulator.
6. Discharge the refrigerant. Refer to 

HA-20, "HFC-134a (R-134a) Service Procedure"

.

7. Remove the low pressure pipe. Refer to 

HA-37, "Removal and Installation for Low-Pressure Pipe"

.

8. Remove the high-pressure pipe.

CAUTION:

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

INSTALLATION

Installation is in the reverse order of removal.

Refer to 

HA-29, "Component"

.

CAUTION:

• Replace the O-ring of the high-pressure pipe with a new one, then apply compressor oil to it when

installing it.

• After charging refrigerant, check for leaks.

Removal and Installation for Rear High- and Low-Pressure A/C and Heater Core Pipes

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REMOVAL

1. Discharge the refrigerant from the A/C system. Refer to 

HA-20, "HFC-134a (R-134a) Service Procedure"

.

2. Drain the coolant from the engine cooling system. Refer to 

CO-11, "Changing Engine Coolant"

.

3. Disconnect the underfloor rear heater hoses (1 and 2) from the

rear heater pipes underneath the vehicle.
•

: Front

4. Remove the rear high- and low-pressure pipes bolt (A) to dis-

connect the rear high- and low-pressure pipes from the under-

floor rear high- and low-pressure pipes underneath the vehicle.

CAUTION:

Cap or wrap the joint of the pipes with suitable material

such as vinyl tape to avoid the entry of air. 

5. Remove the rear high- and low-pressure pipes nuts (B).

NOTE:

The remaining steps are performed inside the rear luggage area of the vehicle.
6. Remove the luggage side finisher lower RH. Refer to 

INT-19, "Removal and Installation"

.

7. Disconnect the rear heater core hoses (1 and 2) from the rear

heater core (3).
•

: Front

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HIGH-PRESSURE PIPE

8. Remove the rear high- and low-pressure pipes bracket bolt (A)

to release the bracket.

• Rear blower motor (1)
•

: Front

9. Remove the rear high- and low-pressure pipes bolt (A) to dis-

connect the rear high- and low-pressure pipes from the rear

expansion valve (1).
•

: Front

CAUTION:

Cap or wrap the joint of the pipes with suitable material

such as vinyl tape to avoid the entry of air. 

10. Disconnect the following electrical connectors:

• Rear air mix door motor (1)

• Rear variable blower control (2)

• Rear blower motor (3)
•

: Front

11. Disconnect the ducts from the rear heater and cooling unit assembly. Refer to 

HA-29, "Component"

.

12. Remove the rear heater and cooling unit assembly.

CAUTION:

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

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

INSTALLATION

Installation is in the reverse order of removal.

Refer to 

HA-29, "Component"

.

CAUTION:

• Replace the O-rings on the rear high- and low-pressure A/C pipes with a new ones, then apply com-

pressor oil to them for installation.

• After charging the refrigerant, check for leaks.

Removal and Installation for Underfloor Rear High- and Low-Pressure A/C and Heater 
Core Pipes

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REMOVAL

1. Drain the engine coolant. Refer to 

CO-11, "Changing Engine Coolant"

.

2. Disconnect the battery negative terminal.
3. Disconnect the generator harness.
4. Discharge the refrigerant. Refer to 

HA-20, "HFC-134a (R-134a) Service Procedure"

.

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HIGH-PRESSURE PIPE

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5. Remove the front and rear bumper fascia. Refer to 

EXT-13, "Removal and Installation"

 (front), 

EXT-15,

"Removal and Installation"

 (rear).

6. Reposition the front fender protector out of the way. Refer to 

EXT-23, "Removal and Installation"

.

7. Disconnect the chassis harness connector.
8. Remove the spare wheel and tire.
9. Remove the tailpipe and tailpipe hanger bracket. Refer to 

EX-6, "Removal and Installation"

.

10. Remove the seatbelt latch anchor. Refer to 

EX-6, "Removal and Installation"

.

11. Remove the front floor heat shield.
12. Disconnect each end of the underfloor rear high- and low-pressure A/C and heater core pipes. Refer to

HA-29, "Component"

.

CAUTION:

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

13. Set two suitable jacks at the RH body mount points to support the vehicle body when it is separated from

the RH side of the frame.

14. Remove the RH body mount bolts. Refer to 

BRM-6, "Body Mounting"

.

15. Use the vehicle hoist to lower the RH side of the frame from the RH side of the body [approximately 305

mm (12 in)] until there is sufficient clearance to remove the underfloor rear high- and low-pressure A/C

and heater core pipes from between the body and the frame.

16. Remove the underfloor rear high- and low-pressure A/C and heater core pipes from the back of the vehi-

cle.

INSTALLATION

Installation is in the reverse order of removal.

CAUTION:

• Replace the O-rings of the underfloor rear high- and low-pressure A/C and heater core pipes with

new ones, then apply compressor oil to them for installation.

• After charging refrigerant, check for leaks.

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CONDENSER

CONDENSER

Removal and Installation for Condenser

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REMOVAL

1. Discharge the refrigerant. Refer to 

HA-20, "HFC-134a (R-134a) Service Procedure"

.

2. Remove the radiator. Refer to 

CO-15, "Removal and Installation"

.

CAUTION:

Be careful not to damage the core surface of the condenser and the radiator.

3. Disconnect the high-pressure flexible hose and the high-pressure pipe from the condenser.

CAUTION:

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

4. Disconnect the refrigerant pressure sensor connector.

• Remove the refrigerant pressure sensor from the condenser

as necessary.

5. Lift the condenser out of the mounting grommets to remove the

condenser.

INSTALLATION

Installation is in the reverse order of removal.

Refer to 

HA-29, "Component"

.

CAUTION:

• Replace the O-rings of the high-pressure pipe, refrigerant pressure sensor, and high-pressure flexi-

ble hose with new ones, then apply compressor oil to them when installing them.

• After charging refrigerant, check for leaks.

• Replace the grommets as necessary.

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