Infiniti G37 Coupe. Manual — part 747
HA-34
< ON-VEHICLE MAINTENANCE >
ELECTRICAL LEAK DETECTOR
5.
Verify at least once by blowing compressed air into area of suspected leakage, then repeat check as out-
lined above if a leak detector detects a leakage.
6.
Do not stop when one leakage is found. Continue checking for additional leakages at all system compo-
nents.
If no leakages are found, perform steps 7 - 10.
7.
Start the engine.
8.
Set the A/C control as per the following;
a.
A/C switch: ON
b.
Air flow: VENT (Ventilation)
c.
Intake door position: Recirculation
d.
Temperature setting: Max. cold
e.
Fan speed: High
9.
Run engine at 1,500 rpm for at least 2 minutes.
10. Stop the engine and perform leakage check again following
steps 4 through 6 above.
Refrigerant leakages should be checked immediately after stop-
ping the engine. Begin with the leak detector at the compressor.
The pressure on the high-pressure side drops gradually after
refrigerant circulation stops and pressure on the low-pressure
side rises gradually, as shown in the graph. Some leakages are
more easily detected when pressure is high.
11. Check recovery/recycling recharging equipment gauges before connecting recovery/recycling recharging
equipment to vehicle. No refrigerant pressure should be displayed. Recover refrigerant from equipment
lines if pressure is displayed, 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 the leaking fitting or com-
ponent if necessary.
15. Evacuate and recharge A/C system and perform the leakage test to confirm no refrigerant leakages.
16. Perform A/C performance test to ensure system works normally.
SHA839E
REFRIGERATION SYSTEM
HA-35
< ON-VEHICLE REPAIR >
C
D
E
F
G
H
J
K
L
M
A
B
HA
N
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P
ON-VEHICLE REPAIR
REFRIGERATION SYSTEM
Exploded View
INFOID:0000000001675632
HA-13, "Refrigerant Connection"
.
Inspection After Installation
INFOID:0000000001675633
SETTING OF SERVICE TOOLS AND EQUIPMENT
Discharging Refrigerant
WARNING:
Never breath A/C refrigerant and lubricant vapor or mist. Exposure may irritate eyes, nose and throat.
Remove HFC-134a (R-134a) from A/C system using certified service equipment meeting requirements
of SAE J-2210 [HFC-134a (R-134a) recycling equipment] or J-2209 [HFC-134a (R-134a) recovery equip-
ment]. Ventilate work area before resuming service if accidental system discharge occurs. Additional
health and safety information may be obtained from refrigerant and lubricant manufacturers.
1.
Blower unit
2.
O-ring
3.
Low-pressure pipe 2
4.
Low-pressure flexible hose
5.
Compressor
6.
Radiator & condenser assembly
7.
High-pressure flexible hose
8.
High-pressure pipe 1
9.
Heater & cooling unit assembly
10. Expansion valve
11.
Evaporator
12. High-pressure pipe 2
13. Low-pressure pipe 1
Refer to
JSIIA0109GB
HA-36
< ON-VEHICLE REPAIR >
REFRIGERATION SYSTEM
Evacuating System and Charging Refrigerant
1.
Shut-off valve
2.
A/C service valve
3.
Recovery/Recycling/Recharging
equipment
JSIIA0238ZZ
1.
Shut-off valve
2.
A/C service valve
3.
Recovery/Recycling/Recharging
equipment
4.
Refrigerant container (HFC-134a)
5.
Weight scale (J-39650)
6.
Vacuum pump (J-39649)
7.
Manifold gauge set (J-39183)
A.
Preferred (best) method
B.
Alternative method
C.
For charging
JSIIA0239ZZ
REFRIGERATION SYSTEM
HA-37
< ON-VEHICLE REPAIR >
C
D
E
F
G
H
J
K
L
M
A
B
HA
N
O
P
*1
HA-26, "Maintenance of Lubricant
Quantity"
*2
*3
.
*4
*5
HA-12, "Working with HFC-134a (R-
134a)"
.
JSIIA0859GB
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