heater NISSAN ALMERA N16 2003 Electronic Manual Online

REFRIGERANT LINES
ATC-145
C
D
E
F
G
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2. Install the evaporator to heater & cooling unit.
3. Install the lower cover, then slide evaporator to forward.
4. Install the expansion valve from engine compartment
Checking for Refrigerant LeaksEJS0020U
Perform a visual inspection of all refrigeration parts, fittings, hoses and components for signs of A/C lubricant
leakage, damage and corrosion. A/C lubricant leakage may indicate an area of refrigerant leakage. Allow
extra inspection time in these areas when using either an electronic refrigerant leak detector or fluorescent
dye leak detector.
If dye is observed, confirm the leak with an electronic refrigerant leak detector. It is possible a prior leak was
repaired and not properly cleaned.
When searching for leaks, do not stop when one leak is found but continue to check for additional leaks at all
system components and connections.
When searching for refrigerant leaks using an electronic leak detector, move the probe along the suspected
leak area at 1 to 2 inches per second and no further than 1/4 inch from the component.
CAUTION:
Moving the electronic leak detector probe slower and closer to the suspected leak area will improve
the chances of finding a leak.
Checking System for Leaks Using the Fluorescent Leak DetectorEJS0020V
1. Check A/C system for leaks using the UV lamp and safety glasses (J-42220) in a low sunlight area (area
without windows preferable). Illuminate all components, fittings and lines. The dye will appear as a bright
green/yellow area at the point of leakage. Fluorescent dye observed at the evaporator drain opening indi-
cates an evaporator core assembly (tubes, core or expansion valve) leak.
2. If the suspected area is difficult to see, use an adjustable mirror or wipe the area with a clean shop rag or
cloth, with the UV lamp for dye residue.
3. After the leak is repaired, remove any residual dye using dye cleaner (J-43872) to prevent future misdiag-
nosis.
4. Perform a system performance check and verify the leak repair with an approved electronic refrigerant
leak detector.
NOTE:
Other gases in the work area or substances on the A/C components, for example, anti-freeze, windshield
washer fluid, solvents and lubricants, may falsely trigger the leak detector. Make sure the surfaces to be
checked are clean.
Clean with a dry cloth or blow off with shop air.
Do not allow the sensor tip of the detector to contact with any substance. This can also cause false readings
and may damage the detector.
RJIA0841E
Expansion valve mounting bolts
Tightening torque :2.9 - 5.0 N·m (0.30 - 0.50 kg·m, 26
- 44 in-lb)
RJIA0842E

REFRIGERANT LINES
ATC-147
C
D
E
F
G
H
I
K
L
MA
B
AT C
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, shop chemicals, or cigarette
smoke in the vicinity of the vehicle. Perform the leak test in calm area (low air/wind movement) 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 (3.45 bar, 3.52 kg/cm
2 , 50 psi) above 16°C
(61°F). If less than specification, recover/evacuate and recharge the system with the specified amount of
refrigerant.
NOTE:
At temperatures below 16°C (61°F), leaks may not be detected since the system may not reach 345 kPa (3.54
kg/cm
2 , 50 psi).
4. Conduct the leak test from the high side (compressor discharge a to evaporator inlet f) to the low side
(evaporator drain hose g to shaft seal i). Refer to AT C - 1 3 4 , "
Components" . Perform a leak check for the
following areas carefully. Clean the component to be checked and move the leak detected probe com-
pletely around the connection/component. ATC-134, "
Components" .
Compressor
Check the fitting of high and low pressure hoses, relief valve and shaft seal.
Liquid tank
Check the refrigerant pressure sensor.
Service valves
Check all around the service valves. Ensure service valve caps are secured on the service valves (to pre-
vent 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)
With engine OFF, turn blower fan on “High” for at least 15 seconds to dissipate any refrigerant trace in the
cooling unit. Wait a minimum of 10 minutes accumulation time (refer to the manufacturer′s recommended
procedure for actual wait time) before inserting the leak detector probe into the drain hose.
Keep the probe inserted for at least 10 seconds. Use caution not to contaminate the probe tip with water
or dirt that may be in the drain hose.
5. If a leak detector detects a leak, verify at least once by blowing 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;
a. A/C switch: ON
b. Face mode
c. Intake position: Recirculation
d. Max cold temperature
e. Fan speed: High
SHA708E

Description=NJEL0485The TCU is applied for YD engine models without common rail and K9K engine models.
The TCU has the following functions.
INTERIOR LAMP TIMERNJEL0485S01The interior lamp timer is controlled by the TCU.
For further information, refer to “INTERIOR ROOM LAMP” (EL-80).
IGNITION KEY WARNING CHIME AND LIGHT WARNING CHIMENJEL0485S02The ignition key and light warning chime are controlled by the TCU.
For further information, refer to “WARNING CHIME” (EL-136).
REAR WINDOW DEFOGGER TIMERNJEL0485S03The rear window defogger and door mirror defogger system are controlled bythe TCU.
For further information, refer to “REAR WINDOW DEFOGGER” (EL-174).
POWER DOOR LOCK (SUPER LOCK)NJEL0485S04The power door lock (super lock) is controlled by the TCU.
For further information, refer to “POWER DOOR LOCK — Super Lock —” (EL-301).
MULTI-REMOTE CONTROL SYSTEMNJEL0485S05The multi-remote control system is controlled by the TCU.
For further information, refer to “MULTI-REMOTE CONTROL SYSTEM” (EL-352).
FUNCTIONNJEL0485S06The TCU has the following control function.
Item Details of control
Direction indicatorsSwitches the director indicators (Left, Right or All) when the combination
switch or hazard switch is operated.
Light warning chimeSounds warning chime when driver’s door is opened with light switch in the
1st or 2nd position and ignition switch “OFF”.
Ignition key warning chineSounds warning chime when driver’s door is opened with key in ignition and
the driver door lock knob (unlock sensor) is moved from the “unlock” posi-
tion to the “lock” position.
Rear window defogger timerTurn off rear window defogger and door mirror heater, if equipped, about 15
minutes after the rear window defogger switch is turned “ON”.
Battery saverShuts off interior lamp in 30 minutes if any door is left open when ignition
switch is “OFF”. The battery saver will reset if ignition switch is cycled or any
door is opened or closed.
Interior lamp timerKeep interior lamp illuminated for about 30 seconds when:
driver’s door is unlocked,
the ignition is switched off,
driver’s door is opened and then closed.
The timer is cancelled, and interior lamp turns off when:
driver’s door is locked, or
ignition switch is turned “ON”.
Power door lock Centrally locks and unlocks the vehicle
Super lock Activates and de-activates the super lock system.
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TIME CONTROL UNIT
Description
EL-381

TYPE 1=NJEL0536S01System DiagramNJEL0536S0101
SEL825Y
Input/Output Signal ChartNJEL0536S0102T: Transmit R: Receive
Signals ECM TCMSmart entrance
control unitCombination meter
Engine speed signal T R
Brake switch signal R T
Rear window defogger signal R T
Heater fan switch signal R T
Air conditioner switch signal R T
MI signal T R
Current gear position signal T R
Engine coolant temperature signal T R
Fuel consumption signal T R
Vehicle speed signal R T
Seat belt reminder signalRT
Headlamp switch signalTR
Flashing indicator signalTR
Engine cooling fan speed signal T R
Child lock indicator signalTR
Door switches state signal T R
A/C compressor signal T R
Accelerator pedal position signal T R
Output shaft revolution signal R T
OD OFF switch signal R T
OD OFF indicator signal T R
A/T self-diagnosis signal R T
CAN COMMUNICATION
CAN Communication Unit (Cont’d)
EL-510

TYPE 2=NJEL0536S02System DiagramNJEL0536S0201
SEL826Y
Input/Output Signal ChartNJEL0536S0202T: Transmit R: Receive
Signals ECMSmart entrance control
unitCombination meter
Engine speed signal T R
Rear window defogger signal R T
Heater fan switch signal R T
Air conditioner switch signal R T
MI signal T R
Engine coolant temperature signal T R
Fuel consumption signal T R
Vehicle speed signal R T
Seat belt reminder signal R T
Headlamp switch signal T R
Flashing indicator signal T R
Engine cooling fan speed signal T R
Child lock indicator signal T R
Door switches state signal T R
A/C compressor signal T R
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CAN COMMUNICATION
CAN Communication Unit (Cont’d)
EL-511

NJEL0311
Use the chart below to find out what each wiring
diagram code stands for.
Refer to the wiring diagram code in the alphabetical
index to find the location (page number) of each
wiring diagram.
Code Section Wiring Diagram Name
ISTSIG AT A/T 1ST Signal
2NDSIG AT A/T 2ND Signal
3RDSIG AT A/T 3RD Signal
4THSIG AT A/T 4TH Signal
A/C, M HA Manual Air Conditioner
A/CCUT EC Air Conditioner Cut Control
AAC/V EC IACV-AAC Valve
AACVLV EC IACV-AAC Valve
ABS BR Anti-lock Brake System
APS EC Accelerator Position Sensor
AT/C EC A/T Control
ATCONT EC A/T Control
ATDIAG EC A/T Diagnosis Communication Line
AUDIO EL Audio
BA/FTS AT A/T Fluid Temperature Sensor and
TCM Power Supply
BACK/L EL Back-up Lamp
BRK/SW EC Brake Pedal Position Switch
CHARGE SC Charging System
CHIME EL Warning Chime
CIGAR EL Cigarette Lighter
CKPS EC Crankshaft Position Sensor (POS)
CKPS EC Crankshaft Position Sensor (TDC)
CLOCK EL Clock
COOL/F EC Cooling Fan Control
D/LOCK EL Power Door Lock
DEF EL Rear Window Defogger
DTRL EL Headlamp — With Daytime Light
System
ECMRLY EC ECM Relay
ECTS EC Engine Coolant Temperature Sensor
EGR/TS EC EGR Temperature Sensor
EGRC1 EC EGR Function
EGVC/V EC EGR Volume Control Valve
ENGSS AT Engine Speed Signal
Code Section Wiring Diagram Name
F/FOG EL Front Fog Lamp
F/PUMP EC Fuel Pump
FRO2 EC Front Heated Oxygen Sensor (Non
E-OBD)
FRO2/H EC Front Heated Oxygen Sensor Heater
(Non E-OBD)
FTS AT A/T Fluid Temperature Sensor
FUEL EC Fuel Injection System Function
GLOW EC Glow Control System
H/AIM EL Headlamp Aiming Control System
H/LAMP EL Headlamp
H/SEAT EL Heated Seat
HEATER HA Heater System
HLC EL Headlamp Washer
HORN EL Horn
IATS EC Intake Air Temperature Sensor
IATSEN EC Intake Air Temperature Sensor
IGN/SG EC Ignition Signal
ILL EL Illumination
INJECT EC Injector
INJPMP EC Injection Pump
INT/L EL Spot, Vanity Mirror, Personal and
Trunk Room Lamps
IVC EC Intake Valve Timing Control Solenoid
Valve
IVC/V EC Intake Valve Timing Control Solenoid
Valve
KS EC Knock Sensor
LOAD EC Load Signal
LPSV AT Line Pressure Solenoid Valve
MAFS EC Mass Air Flow Sensor
MAIN AT Main Power Supply and Ground Cir-
cuit
MAIN EC Main Power Supply and Ground Cir-
cuit
METER EL Speedometer, Tachometer, Temp.
and Fuel Gauges
MIL/DL EC MIL and Data Link Connectors
MIRROR EL Door Mirror
MULTI EL Multi-remote Control System
NATS EL Nissan Anti-Theft System
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WIRING DIAGRAM CODES (CELL CODES)
EL-599

Code Section Wiring Diagram Name
NAVI EL Navigation System
NONDTC AT Non-detectable Items
O2H1B1 EC Front Heated Oxygen Sensor Heater
(E-OBD)
O2H2B1 EC Rear Heated Oxygen Sensor Heater
(E-OBD)
O2S1B1 EC Front Heated Oxygen Sensor
(E-OBD)
O2S2B1 EC Rear Heated Oxygen Sensor
(E-OBD)
OVRCSV AT Overrun Clutch Solenoid Valve
PGC/V EC EVAP Canister Purge Volume Con-
trol Solenoid Valve
PHASE EC Camshaft Position Sensor (PHASE)
PNP/SW EC Park/Neutral Position Switch
PNP/SW AT Park/Neutral Position Switch
PNPSW1 EC Park/Neutral Position Switch
POS EC Crankshaft Position Sensor (POS)
POWER EL Power Supply Routing
PRGVLV EC EVAP Canister Purge Volume Con-
trol Solenoid Valve
PST/SW EC Power Steering Oil Pressure Switch
R/FOG EL Rear Fog Lamp
ROOM/L EL Interior Room Lamp
RP/SEN EC Refrigerant Pressure Sensor
RRO2 EC Rear Heated Oxygen Sensor (Non
E-OBD)
RRO2/H EC Rear Heated Oxygen Sensor Heater
(Non E-OBD)
S/SIG EC Start Signal
SHIFT AT A/T Shift Lock System
S/LOCK EL Power Door Lock — Super Lock —
SROOF EL Sunroof
SRS RS Supplemental Restraint System
SSV/A AT Shift Solenoid Valve A
SSV/B AT Shift Solenoid Valve B
START SC Starting System
STOP/L EL Stop Lamp
TAIL/L EL Parking, License and Tail Lamps
TCV AT Torque Converter Clutch Solenoid
Valve
TPS AT Throttle Position SensorCode Section Wiring Diagram Name
TPS EC Throttle Position Sensor
TURN EL Turn Signal and Hazard Warning
Lamps
VSS EC Vehicle Speed Sensor
VSSA/T AT Vehicle Speed Sensor A/T (Revolu-
tion Sensor)
VSSMTR AT Vehicle Speed Sensor MTR
WARN EL Warning Lamps
WINDOW EL Power Window
WIP/R EL Rear Wiper and Washer
WIPER EL Front Wiper and Washer
WIRING DIAGRAM CODES (CELL CODES)
EL-600

HEATER &
MANUAL AIR CONDITIONER
SECTION
HA
CONTENTS
MANUAL
PRECAUTIONS<0011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100
11001100110011001100110011001100110011001100110011[2
Supplemental Restraint System (SRS)″AIR
BAG″and″SEAT BELT PRE-TENSIONER″...............2
Precautions for Working with HFC-134a (R-134a) .....2
General Refrigerant Precautions .................................2
Precautions for Refrigerant Connection ......................3
Precautions for Servicing Compressor ........................5
Precautions for Service Equipment .............................6
Wiring Diagrams and Trouble Diagnosis .....................8
PREPARATION<0011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100
11001100110011001100110011001100110011001100110011[9
Special Service Tools ..................................................9
HFC-134a (R-134a) Service Tools and
Equipment <0011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100
11001100110011[............10
DESCRIPTION<0011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100
11001100110011001100110011001100110011001100110011[12
Refrigeration System .................................................12
CSV613 Variable Displacement Compressor............13
Component Layout ....................................................17
Control Operation ......................................................18
Discharge Air Flow.....................................................19
System Description ....................................................20
TROUBLE DIAGNOSES................................................21
Component Location..................................................21
Wiring Diagram - Heater............................................23
Circuit Diagram - Air Conditioner...............................24
Wiring Diagram - A/C, M - .........................................25
How to Perform Trouble Diagnoses for Quick
and Accurate Repair ..................................................34Operational Check .....................................................35
Intake Door <0011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100
1100110011[...........37
Mode Door <0011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100
110011001100110011[..........41
Air Mix Door <0011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100
1100110011[..........43
Blower Motor<0011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100
110011[..........45
Magnet Clutch<0011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100
11[.........52
Insufficient Cooling ....................................................66
Insufficient Heating ....................................................75
Noise <0011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100
110011001100110011001100110011[................76
SERVICE PROCEDURE................................................77
HFC-134a (R-134a) Service Procedure ....................77
Maintenance of Lubricant Quantity in
Compressor <0011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100
1100110011[..........79
Compressor <0011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100
1100110011[..........82
Compressor Clutch - CSV613 (CALSONIC
make) <0011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100
110011001100110011001100110011[...............83
Heater & Cooling Unit (Heater Core) ........................87
A/C Evaporator ..........................................................87
Blower Unit <0011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100
1100110011[...........89
Refrigerant Lines .......................................................90
Belt <0011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100
1100110011001100110011001100110011[..................94
Ventilation Air Filter ....................................................95
SERVICE DATA AND SPECIFICATIONS (SDS).........96
Compressor <0011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100
1100110011[..........96
Lubricant <0011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100
11001100110011[..............96
Refrigerant <0011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100
110011[.............96
Engine Idling Speed (When A/C is On).....................96
Belt Tension <0011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100
110011[...........96
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Refrigeration System
REFRIGERATION CYCLENJHA0121Refrigerant FlowNJHA0121S01The refrigerant flows in the standard pattern, that is, through the compressor, the condenser, the liquid tank,
through the evaporator, and back to the compressor. The refrigerant evaporation through the evaporator coil
is controlled by an externally equalized expansion valve, located insidethe heater & cooling unit.
Freeze ProtectionNJHA0121S02The compressor cycles go on and off to maintain the evaporator temperaturewithin a specified range. When
the evaporator coil temperature falls below a specified point, the thermocontrol amplifier interrupts the com-
pressor operation. When the evaporator coil temperature rises above the specification, the thermo control
amplifier allows compressor operation.
Refrigerant System ProtectionNJHA0121S03Refrigerant Pressure SensorNJHA0121S0303The refrigerant system is protected against excessively high or low pressures by the refrigerant pressure
sensor, located on the liquid tank. If the system pressure rises above, or falls below the specifications, the
refrigerant pressure sensor detects the pressure inside the refrigerantline and sends the voltage signal to the
ECM. ECM makes the A/C relay go OFF and stops the compressor when pressure onthe high pressure side
detected by refrigerant pressure sensor is over about 2,746 kPa (27.5 bar,28 kg/cm
2, 398 psi) or below about
137 kPa (1.37 bar, 1.4 kg/cm2, 20 psi).
Dual-pressure Switch
NJHA0121S0304The refrigerant system is protected against excessively high or low pressures by the dual-pressure switch,
located on the liquid tank. If the pressure falls out of specifications, the switch opens to interrupt compressor
operation.
Pressure Relief Valve
NJHA0121S0302The refrigerant system is also protected by a pressure relief valve, located in the rear head of the compres-
sor. When the pressure of refrigerant in the system increases to an unusuallevel [more than 3,727 kPa (37.3
bar, 38 kg/cm
2, 540 psi)], the release port on the pressure relief valve automatically opens and releases
refrigerant into the atmosphere.
RHA682H
DESCRIPTIONMANUAL
Refrigeration System
HA-12

Wiring Diagram — HeaterNJHA0202
YHA460
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TROUBLE DIAGNOSESMANUAL
Wiring Diagram — Heater
HA-23