Infiniti G20 (P11). Manual — part 469
5.
If a leak detector detects a leak, verify at least once by blow-
ing compressed air into area of suspected leak, then repeat
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:
1)
A/C switch ON.
2)
Face mode
3)
Recirculation switch ON
4)
Max cold temperature
5)
Fan speed high
9.
Run engine at 1,500 rpm for at least 2 minutes.
10. Turn engine off and perform leak check again following steps
4 through 6 above.
SHA839E
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 pres-
sure 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 refrig-
erant 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 the leaking fitting or component as neces-
sary.
15. Evacuate and recharge A/C system and perform the leak test
to confirm no refrigerant leaks.
16. Conduct A/C performance test to ensure system works
properly.
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SERVICE PROCEDURE
MANUAL
Refrigerant Lines (Cont’d)
HA-207
Belt
TENSION ADJUSTMENT
NCHA0169
I
Refer to MA-13, “Checking Drive Belt”.
Idle Air Control Valve (IACV) — Auxiliary Air
Control (AAC) Valve
INSPECTION
NCHA0199
I
Refer to EC-436, “System Description” and HA-135.
RHA042G
Ventilation Air Filter
FUNCTION
NCHA0171
Air inside passenger compartment is kept clean at either recircula-
tion or fresh mode by installing ventilation air filter into cooling unit.
SHA868E
REPLACEMENT TIMING
NCHA0172
Replace ventilation air filter.
Refer to MA-6, “PERIODIC MAINTENANCE”.
Caution label is fixed inside the glove box.
SHA192F
REPLACEMENT PROCEDURE
NCHA0173
I
Remove glove box.
I
Remove instrument reinforcement from instrument panel.
I
Remove ventilation air filter fixed clip.
I
Take out the lower side ventilation air filter from cooling unit.
I
Then slide upper side filter to the bottom position and take off
the ventilation air filter from the cooling unit.
I
Replace with new one and reinstall on cooling unit.
I
Reinstall instrument reinforcement, glove box and undercover.
SERVICE PROCEDURE
MANUAL
Belt
HA-208
Manual
COMPRESSOR
NCHA0174
Model
ZEXEL make DKV-14G
Type
Vane rotary
Displacement
cm
3
(cu in)/rev.
140 (8.54)
Direction of rotation
Clockwise (viewed from drive end)
Drive belt
Poly V
LUBRICANT
NCHA0175
Model
ZEXEL make DKV-14G
Name
Nissan A/C System Oil Type R
Part number
KLH00-PAGR0
Capacity
m
(US fl oz, Imp fl oz)
Total in system
180 (6.1, 6.3)
Compressor (Service part) charging
amount
180 (6.1, 6.3)
REFRIGERANT
NCHA0176
Type
HFC-134a (R-134a)
Capacity
kg (lb)
0.55 - 0.65 (1.21 - 1.43)
ENGINE IDLING SPEED (WHEN A/C IS ON)
NCHA0177
I
Refer to EC-632, “Idle Speed and Ignition Timing”.
BELT TENSION
NCHA0178
I
Refer to MA-13, “Checking Drive Belts”.
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SERVICE DATA AND SPECIFICATIONS (SDS)
MANUAL
Manual
HA-209
NOTES
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