2006 NISSAN PATROL Engine

Ambient Sensor
COMPONENT DESCRIPTION
The ambient sensor is attached in front of the driver's side con-
denser. It detects ambient temperature and converts it into a resis-
tance value which is then input into the auto ampli®er.
AMBIENT TEMPERATURE INPUT PROCESS
The automatic ampli®er includes a ``processing circuit'' for the ambi-
ent sensor input. However, when the temperature detected by the
ambient sensor increases quickly, the processing circuit retards the
auto amp. function. It only allows the auto amp. to recognize an
ambient temperature increase of 0.33ÉC per 100 seconds.
As an example, consider stopping for a cup of coffee after high
speed driving. Although the actual ambient temperature has not
changed, the temperature detected by the ambient sensor will
increase. This is because the heat from the engine compartment
can radiate to the front grille area, location of the ambient sensor.
RHA670G
TROUBLE DIAGNOSESAUTO
HA-103

HFC-134a (R-134a) Service Procedure
Set the recovery/recycling equipment.
Recovered lubricant. Refer to
``CHECKING AND ADJUSTING'',
HA-114.
c
Discharge refrigerant into recovery/
recycling equipment.
Repair or replace parts.
Evacuate (over 25 minutes).b
Check air tightness.
OK
*1
cNGRepair.m
Partial charging [approx. 200 g
(7.05 oz)].
Preliminary refrigerant leak check.
Refer to ``PRELIMINARY CHECK'',
HA-119.
OK
*1
cNG
Complete charging (speci®ed amount
less partial charge amount)
Refer to SDS.
*2
Check for refrigerant leaks.
Refer to ``CHECKING PROCEDURE'',
HA-120.
OK
NG
Check for A/C operation and A/C cool-
ing performance..................
Performance Test Diagnoses
Refer to HA-33.
Remove service couplers from A/C
service valves.
Recover refrigerant in charging hoses.
Remove service tools.
Reinstall service valve caps.
Note: *1 Before charging refrigerant, ensure engine is OFF.
*2 Before checking for leaks, start engine to activate air conditioner system then turn engine OFF.
Service valve caps must be installed to prevent leakage.
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SERVICE PROCEDURESMANUAL AND AUTO
HA-112

Maintenance of Lubricant Quantity in
Compressor
The lubricant used to lubricate the compressor circulates through
the system with the refrigerant. Add lubricant to compressor when
replacing any component or after a large gas leakage occurred. It
is important to maintain the speci®ed amount.
If lubricant quantity is not maintained properly, the following mal-
functions may result:
+Lack of lubricant: May lead to a seized compressor
+Excessive lubricant: Inadequate cooling (thermal exchange
interference)
LUBRICANT
Name: Nissan A/C System Oil Type S
Part number: KLH00-PAGS0
CHECKING AND ADJUSTING
Adjust the lubricant quantity according to the ¯owchart shown
below.
START
Can lubricant return operation be per-
formed?
+A/C system works properly.
+There is no evidence of a large amount of
lubricant leakage.
No
cYe s
Perform lubricant return operation, proceeding as follows:
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1. Start engine, and set the following conditions:
+Test condition
Engine speed: Idling to 1,200 rpm
A/C or AUTO switch: ON
Blower speed: Max. position
Temp. control: Optional [Set so that intake air temperature is
25 to 30ÉC (77 to 86ÉF).]
2. Perform lubricant return operation for about 10 minutes.
3. Stop engine.
CAUTION:
If excessive lubricant leakage is noted, do not perform the lubricant
return operation.
Should the compressor be replaced?
No Yes
b
jA(Go to next page.)
Is there any part to be replaced?
(Evaporator, condenser, liquid tank or in
case there is evidence of a large amount of
lubricant leakage.)
No
cYe s
After replacing any of the following major components, add the correct
amount of lubricant to the system.
Amount of lubricant to be added
*1: If compressor is replaced, addition of lubricant is included in the ¯ow
chart.
*2: If refrigerant leak is small, no addition of lubricant is needed.
Carry out the A/C performance test.b
Part replacedLubricant to be added to sys-
tem
Remarks
Amount of lubricant
m!(Imp ¯ oz)
Evaporator 75 (2.6) Ð
Condenser 75 (2.6) Ð
Liquid tank 5 (0.2)Add if compressor is not
replaced. *1
In case of refrigerant leak30 (1.1) Large leak
Ð Small leak*2
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SERVICE PROCEDURESMANUAL AND AUTO
HA-114

Refrigerant Lines
+Refer to page HA-3 regarding ``Precautions for Refrigerant
Connection''.FOR LHD MODELS
RD engine
RHA747G
SERVICE PROCEDURESMANUAL AND AUTO
HA-117

FOR RHD MODELS
RD engine
RHA740G
SERVICE PROCEDURESMANUAL AND AUTO
Refrigerant Lines (Cont'd)
HA-118

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 or tobacco smoke in the vicinity of the
vehicle. Perform the leak test in calm area (low air/wind move-
ment) 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 (3.452
bar, 3.52 kg/cm
2, 50 psi) above 16ÉC (61ÉF). If less than
speci®cation, evacuate and recharge the system with the speci-
®ed amount of refrigerant.
NOTE: At temperatures below 16ÉC (61ÉF), leaks may not be
detected since the system may not reach 345 kPa
(3.452 bar, 3.52 kg/cm
2, 50 psi).
4. Conduct the leak test from the high side to the low side at points
in alphabetical order (j
a,jb......). Refer to HA-117.
Perform a leak check for the following areas carefully. Clean the
component to be checked and move the leak detector probe
completely around the connection/component.
+Compressor
Check the ®tting of high and low pressure hoses, relief valve
and shaft seal.
+Liquid tank
Check the pressure switch, tube ®tting, weld seams and the
fusible plug mounts.
+Service valves
Check all around the service valves. Ensure service valve caps
are secured on the service valves (to prevent 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)
Turn blower fan on ``High'' for at least 15 seconds to dissipate
any refrigerant trace in the cooling unit. Insert the leak detector
probe into the drain hose immediately after stopping the
engine. (Keep the probe inserted for at least ten seconds.)
5. If a leak detector detects a leak, verify at least once by blowing
compressed air into area of suspected leak, then repeat check.
6. Do not stop when one leak is found. Continue to check for
additional leaks at all system components.
7. Start engine.
8. Set the heater A/C control as follows:
a. A/C switch ON
b. Face mode
c. Recirculation switch ON
d. Max cold temperature
e. Fan speed high
SHA708EA
SERVICE PROCEDURESMANUAL AND AUTO
Checking Refrigerant Leaks (Cont'd)
HA-120

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.
Refrigerant leaks should be checked immediately after stop-
ping the engine. Begin with the leak detector on the high pres-
sure line. The pressure in the high pressure line will gradually
drop after refrigerant circulation stops and pressure in the low
pressure line will gradually rise, as shown in the graph. Leaks
are more easily detected when pressure is high.
11. Discharge A/C system using approved refrigerant recovery
equipment. Repair the leaking ®tting or component as neces-
sary.
12. Evacuate and recharge A/C system and perform the leak test
to con®rm no refrigerant leaks.
13. Conduct A/C performance test to ensure system works prop-
erly.
SHA839E
SERVICE PROCEDURESMANUAL AND AUTO
Checking Refrigerant Leaks (Cont'd)
HA-121

General Speci®cations
COMPRESSOR
Model ZEXEL make DKS-17CH
Type Swash plate
Displacement cm
3(cu in)/rev. 168 (10.25)
Cylinder bore x stroke mm (in) 37.0 x 25.8 (1.457 x 1.016)
Direction of rotationClockwise
(Viewed from drive end)
Drive belt A Type
LUBRICANT
Model ZEXEL make DKS-17CH
Type KLH00-PAGS0
Capacity m!(lmp ¯ oz)
Total in system 300 (10.6)
Compressor (Service parts)
charging amount300 (10.6)
Inspection and Adjustment
REFRIGERANT
Front A/C
Type HFC-134a (R-134a)
Capacity kg (lb)0.75 - 0.85
(1.65 - 1.87)
ENGINE IDLING SPEED (When A/C is ON.)
+Refer to EC section.
BELT TENSION
+Refer to MA section (``Checking Drive Belts'',
``ENGINE MAINTENANCE'').
COMPRESSOR
Model DKS-17CH
Clutch disc-to-pulley clearance
mm (in)0.3 - 0.6
(0.012 - 0.024)
SERVICE DATA AND SPECIFICATIONS
(SDS)MANUAL AND AUTO
HA-126