2006 NISSAN PATROL air condition

A/C System
TROUBLE DIAGNOSIS PROCEDURE FOR A/C SYSTEM
SYMPTOM:
+A/C system does not come on.
Inspection ¯ow
*1: HA-74 *2: HA-70
COMPONENT DESCRIPTION
Automatic ampli®er (Auto amp.)
The auto ampli®er has a built-in microcomputer which processes
information sent from various sensors needed for air conditioner
operation. The air mix door motor, mode door motor, intake door
motor, blower motor and compressor are then controlled.
The auto ampli®er is unitized with control mechanisms. Signals
from various switches and Potentio Temperature Control (PTC) are
directly entered into auto ampli®er.
Self-diagnostic functions are also built into auto ampli®er to provide
quick check of malfunctions in the auto air conditioner system.
Potentio temperature control (PTC)
The PTC is built into the A/C auto amp. It can be set at an interval
of 1ÉC in the 18ÉC to 32ÉC temperature range by turning the tem-
perature dial. The set temperature is digitally displayed.
SHA019F
RHA629G
RHA746G
TROUBLE DIAGNOSESAUTO
HA-73

DIAGNOSTIC PROCEDURE
SYMPTOM: Intake door motor does not operate normally.
+Perform Self-diagnosis STEP 4 before referring to the ¯ow
chart.
CHECK POWER SUPPLY FOR INTAKE
DOOR MOTOR.
Disconnect intake door motor harness
connector.
Do approx. 12 volts exist between intake
door motor harness terminal No.j
1and
body ground?
Ye s
cNo
Check power supply circuit
and 10A fuse (No.
6,
located in the fuse block).
Note
CHECK FOR AUTO AMP. OUTPUT.
Set up Self-diagnosis STEP 4.
Measure voltage across auto amp. har-
ness terminals and body ground.
OK
cNG
Check circuit continuity
between each terminal on
auto amp. and on intake
door motor.
OK
Replace auto amp.
Replace intake door motor.
Note:If the result is NG or No after checking circuit continuity, repair harness or
connector.
Code No.Terminal No.
ConditionVoltage
VÅ@
j13
Body
groundREC0
j
2312
j
1412j1320%
FRE12
j230
j
1412j13
FRE12
j2312
j
140
0V: Approx. 0V
12V: Approx. 12V
Terminal No.
Continu-
ityÅ@
Auto amp.Intake door
motor
j
13j13
Ye s j23j23j14j14
SHA858EB
RHA081GB
RHA642G
RHA634G
.
.
.
TROUBLE DIAGNOSESAUTO
Intake Door Motor (Cont'd)
HA-85

SYSTEM DESCRIPTION
Component parts
Fan speed control system components are:
1) Auto amp.
2) Fan control amp.
3) A/C LAN system (PBR built in mode door motor and air mix door motor)
4) In-vehicle sensor
5) Ambient sensor
6) Sunload sensor
7) Intake sensor
System operation
Automatic mode
In the automatic mode, the blower motor speed is calculated by the automatic ampli®er based on inputs from
the PBR, in-vehicle sensor, sunload sensor, intake sensor and ambient sensor. The blower motor applied
voltage ranges from approximately 5 volts (lowest speed) to 12 volts (highest speed).
The control blower speed (in the range of 5 to 12V), the automatic ampli®er supplies a gate voltage to the fan
control ampli®er. Based on this voltage, the fan control ampli®er controls the voltage supplied to the blower
motor.
Starting fan speed control
Start up from ``COLD SOAK'' condition (Automatic mode)
In a cold start up condition where the engine coolant temperature is below 50ÉC, the blower will not operate
for a short period of time (up to 150 seconds). The exact start delay time varies depending on the ambient
and engine coolant temperature.
In the most extreme case (very low ambient) the blower starting delay will be 150 seconds as described above.
After this delay, the blower will operate at low speed until the engine coolant temperature rises above 55ÉC,
at which time the blower speed will increase to the objective speed.
Start up from normal or ``HOT SOAK'' condition (Automatic mode)
The blower will begin operation momentarily after the AUTO button is pushed. The blower speed will gradu-
ally rise to the objective speed over a time period of 3 seconds or less (actual time depends on the objective
blower speed).
SHA006FB
TROUBLE DIAGNOSESAUTO
Blower Motor (Cont'd)
HA-87

jD
Note
Check circuit continuity between dual-pres-
sure switch harness terminal No.j
1and
thermo control amp. harness terminal No.
j
3.
Continuity should exist.
If OK, check harness for short.
Note:
If the result is NG or No after checking circuit continuity, repair harness
or connector.
COMPONENT INSPECTION
A/C relay
Check continuity between terminal Nos.j3andj5,j6andj7.
Conditions Continuity
12V direct current supply between terminal Nos.
j
1andj2Ye s
No current supply No
If NG, replace relay.
Dual-pressure switch
ON
kPa (bar, kg/cm2, psi)OFF
kPa (bar, kg/cm2, psi)
Low-pressure
sideIncreasing to
157 - 216 (1.57 - 2.16,
1.6 - 2.2, 23 - 31)Decreasing to
157 - 196 (1.57 - 1.96,
1.6 - 2.0, 23 - 28)
High-pressure
sideDecreasing to
1,863 - 2,256 (18.6 - 22.6,
19 - 23, 270 - 327)Increasing to
2,452 - 2,844 (24.5 - 28.4,
25 - 29, 356 - 412)
RHA663G
SEC202B
RHA628G
.
TROUBLE DIAGNOSESAUTO
Magnet Clutch (Cont'd)
HA-97

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.
.
.
.
.
.
.
.
.
.
.
.
.
.
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
.
.
.
.
.
SERVICE PROCEDURESMANUAL AND AUTO
HA-114

A
A/C HFC134a (R134a) system service
procedure ..................................................HA-112
A/C HFC134a system service equip-
ment precaution ............................................HA-9
A/C air ¯ow .....................................................HA-13
A/C component layout ....................................HA-12
A/C compressor precaution..............................HA-6
A/C compressor special service tool ...........HA-6, 7
A/C control linkage adjustment (auto
A/C).............................................................HA-77
A/C control operation (manual A/C) ...............HA-16
A/C harness layout (manual A/C) ..................HA-17
A/C lubricant (R134a) ...................................HA-114
A/C relay.........................................................HA-97
A/C self-diagnoses (auto A/C)........................HA-63
A/CCUT - Wiring diagram ............................EC-186
A/T control ....................................................EC-174
ABS sensor rotor ............................................FA-15
ACC/SW - Wiring diagram ...........................EC-105
ACL/SW - Wiring diagram ............................EC-164
ADJRES - Wiring diagram .............................EC-91
APS - Wiring diagram ..................................EC-138
AT/C - Wiring diagram..................................EC-174
AUDIO - Wiring diagram ...............................EL-168
Accelerator position sensor ..........................EC-138
Accelerator position switch...........................EC-164
Accelerator switch (F/C) ...............................EC-105
Adjustment resistor.........................................EC-91
Air bag disposal..............................................RS-17
Air bag ..............................................................RS-8
Air bleeding (hydraulic clutch) ..........................CL-6
Air bleeding for brake system ..........................BR-4
Air cleaner ®lter replacement .........................MA-18
Air conditioner cut control ..............................EC-19
Air ¯ow meter - See Mass air ¯ow
sensor .........................................................EC-73
Air mix door control linkage
adjustment ................................................HA-81
Alternator.........................................................EL-56
Antenna - See Power antenna .....................EL-181
Audio and A/C control removal and
installation - See Instrument panel .............BT-11
Audio .............................................................EL-168
Auto lock free running hub .............................FA-13
Automatic ampli®er .........................................HA-61
Axle housing (rear) ...........................................RA-9
B
BACK/L - Wiring diagram................................EL-78
Back door opener - See Back door ..................BT-6
Back door trim.................................................BT-24
Back door window...........................................BT-45
Back door ..........................................................BT-6Back-up lamp switch (M/T) ..............................MT-4
Back-up lamp ..................................................EL-78
Battery .............................................................EL-37
Baulk ring (M/T)..............................................MT-10
Body alignment ...............................................BT-49
Body mounting ................................................BT-48
Brake booster .................................................BR-15
Brake ¯uid change ...........................................BR-3
Brake ¯uid level and line check .......................BR-3
Brake ¯uid level .............................................MA-23
Brake hydraulic line ..........................................BR-5
Brake inspection ............................................MA-24
Brake master cylinder ....................................BR-12
Brake pedal ....................................................BR-10
Bulb speci®cations ........................................EL-314
Bumper, front ................................................... BT-4
Bumper, rear .....................................................BT-6
C
CD/CHG - Wiring diagram ............................EL-176
CHIME - Wiring diagram...............................EL-136
CIGAR - Wiring diagram ...............................EL-156
CKPS - Wiring diagram ................................EC-143
CLOCK - Wiring diagram ..............................EL-157
CMPS - Wiring diagram .................................EC-68
COMPAS - Wiring diagram ...........................EL-117
CONSULT for ECCS ......................................EC-36
CONSULT general information ........................GI-33
COOL/F - Wiring diagram ............................EC-112
CSPS - Wiring diagram ..................................EC-86
Cab body.........................................................BT-47
Camshaft inspection ......................................EM-36
Camshaft position sensor (PUMP).................EC-68
Center case (Transfer) ....................................TF-10
Charge air cooler fan control .......................EC-177
Charge air temperature sensor ....................EC-121
Chassis and body maintenance ....................MA-20
Cigarette lighter.............................................EL-156
Circuit breaker.................................................EL-14
Clock .............................................................EL-157
Clutch booster...................................................CL-9
Clutch cover ....................................................CL-14
Clutch damper ..................................................CL-7
Clutch disc ......................................................CL-13
Clutch ¯uid level.............................................MA-20
Clutch master cylinder ......................................CL-7
Clutch operating cylinder ..................................CL-8
Clutch pedal ......................................................CL-5
Clutch release bearing ....................................CL-11
Clutch release mechanism .............................CL-11
Clutch withdrawal lever ...................................CL-11
Coil spring (front) ............................................FA-25
Coil spring (rear) ............................................RA-14
Collision diagnosis..........................................RS-45
Combination meter removal and instal-
lation - See Instrument panel ......................BT-11
ALPHABETICAL INDEX
IDX-2

MAINTENANCE
SECTION
MA
CONTENTS
PRECAUTIONS AND PREPARATION............................1
Supplemental Restraint System (SRS) ``AIR
BAG'' and ``SEAT BELT PRE-TENSIONER''...............1
Special Service Tools ..................................................1
PRE-DELIVERY INSPECTION ITEMS............................2
GENERAL MAINTENANCE............................................3
PERIODIC MAINTENANCE............................................4
Engine Oil & Minor Service .........................................4
Engine and Emission Control Service .........................5
Chassis and Body Services.........................................6
Maintenance Under Severe Driving Conditions ..........8
RECOMMENDED FLUIDS AND LUBRICANTS.............9
Fluids and Lubricants ..................................................9
SAE Viscosity Number ..............................................10
Anti-freeze Coolant Mixture Ratio ............................. 11
ENGINE MAINTENANCE..............................................12
Checking Tightening Torque ......................................12
Checking Drive Belt ...................................................12
Changing Engine Oil..................................................13
Changing Engine Oil Filter ........................................14
Changing Engine Coolant..........................................14
Checking Cooling System .........................................16
Checking and Replacing Fuel Filter and Draining
Water .........................................................................16
Checking Fuel Lines ..................................................17
Cleaning and Replacing Air Cleaner Filter ................18
Checking Injection Nozzle .........................................18
Checking Idle Speed .................................................19
Timing Belt Replacement...........................................19
CHASSIS AND BODY MAINTENANCE.......................20
Checking Exhaust System.........................................20
Checking Clutch Fluid Level and Leaks ....................20
Checking Clutch System ...........................................20Checking M/T Oil Level and Leaks ...........................20
Changing M/T Oil.......................................................20
Checking Water Entry ................................................21
Checking Transfer Fluid Level ...................................21
Changing Transfer Fluid ............................................21
Checking Propeller Shaft ...........................................21
Greasing Nipples of Propeller Shafts ........................21
Checking Differential Gear Oil ...................................22
Changing Differential Gear Oil ..................................22
Checking Front Wheel Bearing Grease ....................22
Repacking Front Wheel Bearing and Axle Joint
Grease .......................................................................23
Checking Free-running Hub Grease .........................23
Checking Water Entry in Knuckle Flange..................23
Checking Brake Fluid Level and Leaks.....................23
Checking Brake System ............................................24
Changing Brake Fluid ................................................24
Checking Brake Booster, Vacuum Hoses,
Connections and Check Valve ..................................24
Checking Disc Brake .................................................24
Balancing Wheels ......................................................25
Tire Rotation ..............................................................25
Checking Power Steering Fluid and Lines ................26
Checking Steering Damper .......................................26
Checking Steering Gear Box and Linkage ................26
Lubricating Locks, Hinges and Hood Latches...........27
Checking Seat Belts, Buckles, Retractors,
Anchors and Adjusters...............................................27
Checking Body Corrosion ..........................................28
SERVICE DATA AND SPECIFICATIONS (SDS)..........29
Engine Maintenance ..................................................29
Chassis and Body Maintenance ................................29
MA