Infiniti F50. Manual - part 158

REFRIGERANT LINES

ATC-157

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ATC

CHECKING PROCEDURE

To prevent inaccurate or false readings, make sure there is no refrigerant vapor, shop chemicals, or cigarette
smoke in the vicinity of the vehicle. Perform the leak test in calm area (low air/wind movement) so that the
leaking refrigerant is not dispersed.

1.

Turn engine OFF.

2.

Connect a suitable A/C manifold gauge set to the A/C service ports.

3.

Check if the A/C refrigerant pressure is at least 345 kPa (3.52 kg/cm

2

 , 50 psi) above 16

°

C (61

°

F). If less

than specification, recover/evacuate and recharge the system with the specified amount of refrigerant.

NOTE:
At temperatures below 16

°

C (61

°

F), leaks may not be detected since the system may not reach 345 kPa (3.54

kg/cm

2

 , 50 psi).

4.

Conduct the leak test from the high side (compressor discharge a to evaporator inlet f) to the low side
(evaporator drain hose g to shaft seal h). Refer to 

ATC-143, "Components"

 . Perform a leak check for the

following areas carefully. Clean the component to be checked and move the leak detection probe com-
pletely around the connection/component.
Compressor
Check the fitting of high and low pressure hoses, relief valve and shaft seal.
Liquid tank
Check the refrigerant pressure sensor.
Service valves
Check all around the service valves. Ensure service valve caps are secured on the service valves (to pre-
vent leaks).

NOTE:
After removing A/C manifold gauge set from service valves, wipe any residue from valves to prevent any
false readings by leak detector.

Cooling unit (Evaporator)
With engine OFF, turn blower fan on 

″

High

″

 for at least 15 seconds to dissipate any refrigerant trace in the

cooling unit. Wait a minimum of 10 minutes accumulation time (refer to the manufacturer

′

s recommended

procedure for actual wait time) before inserting the leak detector probe into the drain hose.
Keep the probe inserted for at least 10 seconds. Use caution not to contaminate the probe tip with water
or dirt that may be in the drain hose.

5.

If a leak detector detects a leak, verify it at least once by blowing compressed air into area of suspected
leak and repeating the check as outlined above.

6.

Do not stop when one leak is found. Continue to check for additional leaks at all system components.
If no leaks are found, perform steps 7 - 10.

7.

Start engine.

8.

Set the heater A/C control as follows;

a.

AUTO switch: ON

b.

Face mode

c.

Intake position: Recirculation

d.

Max cold temperature

e.

Fan speed: High

9.

Run engine at 1,500 rpm for at least 2 minutes.

10. Turn engine off and perform leak check again by following steps 4 through 6 above.

ATC-158

REFRIGERANT LINES

Refrigerant leaks should be checked immediately after stopping the
engine. Begin with the leak detector at the compressor. The pres-
sure on the high pressure side will gradually drop after refrigerant
circulation stops and pressure on the low pressure side will gradually
rise, as shown in the graph. Some leaks are more easily detected
when pressure is high.

11. Before connecting ACR4 to vehicle, check ACR4 gauges. No refrigerant pressure should be displayed. If

pressure is displayed, recover refrigerant from equipment lines and then check refrigerant purity.

12. Confirm refrigerant purity in supply tank using ACR4 and refrigerant identifier.

13. Confirm refrigerant purity in vehicle A/C system using ACR4 and refrigerant identifier.

14. Discharge A/C system using approved refrigerant recovery equipment. Repair or replace the leaking fit-

ting or component as necessary.

15. Evacuate and recharge A/C system and perform the leak test to confirm there are no remaining refrigerant

leaks.

16. Conduct A/C performance test to ensure system works properly.

SHA839E

SERVICE DATA AND SPECIFICATIONS (SDS)

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ATC

SERVICE DATA AND SPECIFICATIONS (SDS)

PFP:00030

Compressor

EJS001QE

Lubricant

EJS001QF

Refrigerant

EJS001QG

Engine Idling Speed

EJS001QH

Refer to 

EC-698, "Idle Speed and Ignition Timing"

 .

Belt Tension

EJS001QI

Refer to 

EM-12, "DRIVE BELTS"

 .

Model

Calsonic Kansei V-6

Type

V-6 variable displacement

Displacement

cm

3

  (cu in)/rev

Max.

184 (11.228)

Min.

14.5 (0.885)

Cylinder bore 

×

 stroke

mm (in)

37 (1.46) 

×

 [2.3 - 28.6 (0.091 - 1.126)]

Direction of rotation

Clockwise (viewed from drive end)

Drive belt

Poly V

Model

Calsonic Kansei V-6

Name

Nissan A/C System Oil Type S

Part number

KLH00-PAGS0

Capacity

m

 (US fl oz, lmp fl oz)

Total in system

180 (6.0, 6.3)

Compressor (Service part) charg-
ing amount

180 (6.0, 6.3)

Type

HFC-134a (R-134a)

Capacity
kg (lb)

0.60 (1.32)

ATC-160

SERVICE DATA AND SPECIFICATIONS (SDS)