Infiniti M45 (Y34). Manual - part 166

REFRIGERANT LINES

ATC-149

C

D

E

F

G

H

I

K

L

M

A

B

ATC

1.

Position probe approximately 5 mm (3/16 in) away from point to
be checked.

2.

When testing, circle each fitting completely with probe.

3.

Move probe along component approximately 25 to 50 mm (1 to
2 in)/sec.

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

(3.52 kg/cm

2

 , 50 psi).

4.

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

ATC-136, "Components"

 . Perform a

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

SHA707EA

SHA706E

SHA708EA

ATC-150

REFRIGERANT LINES

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.

Refrigerant leaks should be checked immediately after stopping
the engine. Begin with the leak detector at the compressor. The
pressure 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 recovery/recycling recharging equipment to vehicle, check recovery/recycling recharg-

ing equipment 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 recovery/recycling recharging equipment and refrigerant

identifier.

13. Confirm refrigerant purity in vehicle A/C system using recovery/recycling recharging equipment and refrig-

erant identifier.

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

ting or component if 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)

ATC-151

C

D

E

F

G

H

I

K

L

M

A

B

ATC

SERVICE DATA AND SPECIFICATIONS (SDS)

PFP:00030

Compressor

AJS00094

Lubricant

AJS00095

Refrigerant

AJS00096

Engine Idling Speed

AJS00097

Refer to 

EC-706, "Idle Speed and Ignition Timing"

 .

Belt Tension

AJS00098

Refer to 

EM-13, "DRIVE BELTS"

 .

Model

Calsonic Kansei make CWE-618

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 make CWE-618

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) charging amount

180 (6.0, 6.3)

Type

HFC-134a (R-134a)

Capacity
kg (lb)

0.60 (1.32)

ATC-152

SERVICE DATA AND SPECIFICATIONS (SDS)