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