2005 INFINITI FX35 sensor

ATC-156
REFRIGERANT LINES
Revision: 2005 July 2005 FX

After piping has been connected, pull male-side piping by hand to make sure piping does not
come off.

When recharging refrigerant, check for leaks.
Removal and Installation of Refrigerant Pressure SensorAJS00160
REMOVAL
1. Remove condenser. Refer to ATC-155, "Removal and Installation of Condenser" .
2. Remove refrigerant pressure sensor from condenser. CAUTION:
When working, be careful not to damage the condenser.
INSTALLATION
Installation is basically the reverse order of removal.
CAUTION:
Apply compressor oil to O-ring of refrigerant pressure sensor when installing it.
Removal and Installation of EvaporatorAJS001BJ
REMOVAL
1. Remove low-pressure pipe 2 and high-pressure pipe 3. Refer to ATC-152, "Removal and Installation of
Low-Pressure Pipe 2 and High-Pressure Pipe 3" .
CAUTION:
Cap or wrap the joint of the pipe with suitable material such as vinyl tape to avoid the entry of air.
2. Slide evaporator, and then remove it from heater & cooling unit.
3. Remove intake sensor from evaporator, and then remove evap- orator.
INSTALLATION
Installation is basically the reverse order of removal.
CAUTION:

Replace O-rings of A/C piping with new ones, and then apply compressor oil to it when installing
it.

Connection point for female-side piping is thin. So, when inserting male-side piping, take care not
to deform female-side piping. Slowly insert in axial direction.

Insert one-touch joint connection point securely until it clicks.

After piping has been connected, pull male-side piping by hand to make sure piping does not
come off.

O-rings are different from low-pressure pipe 1 (high-pressure pipe 2) and low-pressure pipe 2
(high-pressure pipe 3). High- pressure flexible hose bracket mounting bolt
Tightening torque : 5.5 N·m (0.56 kg-m, 49 in-lb)
RJIA2076E
RJIA0928E

REFRIGERANT LINES ATC-157
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Revision: 2005 July 2005 FX

Mark the mounting position of intake sensor bracket prior to removal so that the reinstalled sen-
sor can be located in the same position.

When recharging refrigerant, check for leaks.
Removal and Installation of Expansion ValveAJS001BK
REMOVAL
1. Remove evaporator. Refer to ATC-156, "Removal and Installation of Evaporator" .
2. Remove mounting bolts, and then remove expansion valve. CAUTION:
Cap or wrap the joint of the pipe with suitable material such
as vinyl tape to avoid the entry of air.
INSTALLATION
Installation is basically the reverse order of removal.
CAUTION:

Replace O-rings of evaporator with new ones, and then apply compressor oil to it when installing
it.

O-rings are different from low-pressure pipe 1 (high-pressure pipe 2) and low-pressure pipe 2
(high-pressure pipe 3).

When recharging refrigerant, check for leaks. Low-pressure pipe 1 bracket mounting bolt
Tightening torque : 5.5 N·m (0.56 kg-m, 49 in-lb)
RJIA1864E

ATC-158
REFRIGERANT LINES
Revision: 2005 July 2005 FX
Checking for Refrigerant LeaksAJS00163
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 (SST: J-42220).
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 DetectorAJS00164
1. Check A/C system for leaks using the UV lamp and safety goggles (SST: J42220) 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 open-
ing indicates 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 (SST: J43872) to prevent future mis- diagnosis.
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.
Dye InjectionAJS00165
(This procedure is only necessary when recharging the system or when the compressor has seized and was
replaced.)
1. Check A/C system static (at rest) pressure. Pressure must be at least 345 kPa (3.52 kg/cm
2 , 50 psi).
2. Pour one bottle (1/4 ounce / 7.4 cc) of the A/C refrigerant dye into the injector tool (SST: J 41459).
3. Connect the injector tool to the A/C Low-pressure side service fitting.
4. Start engine and switch A/C ON.
5. When the A/C operating (compressor running), inject one bottle (1/4 ounce / 7.4 cc) of fluorescent dye through the low-pressure service valve using dye injector tool (SST: J-41459) (refer to the manufacture’s
operating instructions).
6. With the engine still running, disconnect the injector tool from the service fitting. CAUTION:
Be careful the A/C system or replacing a component, pour the dye directly into the open system
connection and proceed with the service procedures.
7. Operate the A/C system for a minimum of 20 minutes to mix the dye with the system oil. Depending on the leak size, operating conditions and location of the leak, it may take from minutes to days for the dye to
penetrate a leak and become visible.
8. Attach a blue label as necessary.

ATC-160
REFRIGERANT LINES
Revision: 2005 July 2005 FX
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. Stop engine.
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 (3.52 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
(3.52 kg/cm
2 , 50 psi).
4. Perform the leak test from the high-pressure side (compressor discharge a to evaporator inlet h) to the low-pressure side [evaporator drain hose i to shaft seal o (VK45DE) or n (VQ35DE)]. Refer to ATC-140,
"Components" . Perform a leak check for the following areas carefully. Clean the component to be
checked and move the leak detected probe completely around the connection/component.
Compressor
Check the fitting of high- and low-pressure flexible hoses, relief valve and shaft seal.
Condenser
Check the fitting of high-pressure flexible hose and pipe, refrigerant pressure sensor.
Liquid tank
Check the refrigerant connection.
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. Mode door position: VENT (Ventilation)
c. Intake 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 engine and perform leak check again following steps 4 through 6 above.
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 pressure on the low-pressure
side will gradually rise, as shown in the graph. Some leaks are
more easily detected when pressure is high.
SHA839E

INTEGRATED DISPLAY SYSTEM AV-61
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Revision: 2005 July 2005 FX
D/N SCREEN

Turning on “DAY/NIGHT” switch, DAY MODE or NIGHT MODE
is indicated for present mode.

If press “DAY/NIGHT” again when display adjustment lumi-
nance, change DAY-NIGHT (NIGHT-DAY) mode (screen of
adjustment luminance).
As follows:

Press “PREV” or not operate for 10sec. when displayed screen
of adjustment luminance, back to default screen (same mode).

Can adjust luminance by “DISP” switch. Light can be adjusted by pressing “+” (bright) or “–” (dark).

Adjustment range is a 12 stage (MIN to MAX) and default set value is 10 (DAY) and 4 (NIGHT).
WARNING INDICATIONS
When BCM receives warning signal from some control units or sensors, then combination meter warning lamp
is illuminated.
Then BCM sends warning signal to display unit warning indications on the screen.
AV COMMUNICATION LINE
Display unit is controlled by the following unit with AV communication line.

A/C and AV switch
CAN Communication System DescriptionAKS007Z5
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only.
CAN Communication UnitAKS007YZ
Refer to LAN-30, "CAN Communication Unit" .
Component Parts and Harness Connector Location AKS005U2
NOW Change display
DAY DAY →NIGHT →DAY →·····
NIGHT NIGHT →DAY →NIGHT →·····
SKIA5920E
Warning indicators Warning lamps in
instrument panel Warning detection and cancel conditions Cases of malfunction
DOOR OPEN Door Detection
condition Vehicle is running [approx. 3.5 km/h (2 MPH) or
faster] and door ajar of any of the doors is detected. Door is open.
Cancel
condition Vehicle is stopped and all the doors close.
SKIA4970E

AV-78
INTEGRATED DISPLAY SYSTEM
Revision: 2005 July 2005 FX
Trouble Diagnosis Chart by SymptomAKS005UB
Symptom Suspect Systems and reference
No screen is shown. Refer to
AV-79, "
Power Supply and Ground Circuit Check for Display Unit" .
If above is normal, replace display unit.
Screen does not switch to nighttime mode after the
lighting switch is turned 1st. Refer to
AV-81, "
Illumination Signal Inspection" .
TRIP and FUEL ECON screen do not appear. Refer to AV-82, "
Ignition Signal Inspection" .
Journey distance (DIST) is not added up. Refer to AV-80, "
Vehicle Speed Signal Inspection" .
Average vehicle speed (AVG) is not displayed.
Average fuel consumption (AVG) is not displayed.

Refer to AV-80, "Vehicle Speed Signal Inspection" .

Refer to AV-85, "CAN Communication Line Inspection" .
If above is normal, replace display unit.
Distance to empty (DTE) is not displayed.

Check if speedometer operates. If it does not operate, go to AV- 8 0 , "Vehicle
Speed Signal Inspection" .

Check if fuel gauge operates. If it does not operate, go to DI-22, "Fuel Level
Sensor Signal Inspection" .

Refer to AV-85, "CAN Communication Line Inspection" .
If above is normal, replace display unit.
Tire pressure is not displayed.

Check BCM (Body Control Module). Refer to BCS-3, "BCM (BODY CONTROL
MODULE)" .

Refer to AV-85, "CAN Communication Line Inspection" .
If above is normal, replace display unit.
Door warning screen does not appear.

Refer to AV-80, "Vehicle Speed Signal Inspection" .

Refer to AV-85, "CAN Communication Line Inspection" .
If above is normal, replace display unit.
A/C and AV switch and all switch operation are not
possible.
(Do not start self-diagnosis.)

Refer to AV-80, "Power Supply and Ground Circuit Check for A/C and AV
Switch" .

Refer to AV-77, "A/C and AV Switch Self-Diagnosis Function" .

Refer to AV-84, "AV Communication Line Inspection" .
If above is normal, replace display unit.
Audio operation is not possible.

Refer to AV-77, "A/C and AV Switch Self-Diagnosis Function" .

Refer to AV-82, "Audio Communication Line Inspection" .
Audio steering wheel switches do not function. Refer to
AV-86, "
Audio Steering Wheel Switch Inspection" .
If above is normal, replace AV and A/C switch.
Air conditioner operation is not possible.

Refer to AV-77, "A/C and AV Switch Self-Diagnosis Function" .

Refer to AV-85, "CAN Communication Line Inspection" .

NAVIGATION SYSTEM AV-87
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Revision: 2005 July 2005 FX
NAVIGATION SYSTEMPFP:25915
System DescriptionAKS007IQ
The navigation system periodically calculates the vehicle's current
position according to the following three signals: Travel distance of
the vehicle as determined by the vehicle speed sensor, turning angle
of the vehicle as determined by the gyroscope (angular velocity sen-
sor), and the direction of vehicle travel as determined by the GPS
antenna (GPS information).
The current position of the vehicle is then identified by comparing the
calculated vehicle position with map data read from the map DVD-
ROM, which is stored in the DVD-ROM drive (map-matching), and
indicated on the screen with a current-location mark.
By comparing the vehicle position detection results found by the
GPS and by map-matching, more accurate vehicle position data can
be used.
The current vehicle position will be calculated by detecting the dis-
tance the vehicle moved from the previous calculation point and its
direction.
TRAVEL DISTANCE
Travel distance calculations are based on the vehicle speed sensor input signal. Therefore, the calculation
may become incorrect as the tires wear down. To prevent this, an automatic distance fine adjustment function
has been adopted.
TRAVEL DIRECTION
Change in the travel direction of the vehicle is calculated by a gyroscope (angular velocity sensor) and a GPS
antenna (GPS information). As the gyroscope and GPS antenna have both merit and demerit, input signals
from them are prioritized in each situation. However, this order of priority may change in accordance with more
detailed travel conditions so that the travel direction is detected more accurately.
MAP-MATCHING
Map-matching is a function that repositions the vehicle on the road
map when a new location is judged to be the most accurate. This is
done by comparing the current vehicle position, calculated by the
method described in the position detection principle, with the road
map data around the vehicle, read from the map DVD-ROM stored in
the DVD-ROM drive.
Therefore, the vehicle position may not be corrected after the vehicle
is driven over a certain distance or time in which GPS information is
hard to receive. In this case, the current location mark on the display
must be corrected manually.
CAUTION:
The road map data is based on data stored in the map DVD-
ROM.
SKIA6215E
SEL684V
Type Advantage Disadvantage
Gyroscope
(angular velocity sensor)

Can detect the vehicle's turning angle
quite accurately.
Direction errors may accumulate when the vehicle is
driven for long distances without stopping.
GPS antenna
(GPS information)

Can detect the vehicle's travel direction
(North/South/East/West).
Correct direction cannot be detected when the vehicle
speed is low.
SEL685V

NAVIGATION SYSTEM AV-89
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Revision: 2005 July 2005 FX
COMPONENT DESCRIPTION
NAVI Control Unit

The gyro (angular speed sensor) and the DVD-ROM drive are
built-in units that control the navigation functions.

Signals are received from the gyro, the vehicle speed sensor,
and the GPS antenna. Vehicle location is determined by com-
bining this data with the data contained in the DVD-ROM map.
Locational information is shown on LCD panel.
DVD-ROM Drive
Maps, traffic control regulations, and other pertinent information can
be easily read from the DVD-ROM disc.
Map DVD-ROM

The map DVD-ROM has maps, traffic control regulations, and other pertinent information.

To improve DVD-ROM map matching and route determination functions, the DVD-ROM uses an exclusive
Nissan format. Therefore, the use of a DVD-ROM provided by other manufacturers cannot be used.
Gyro (Angular Speed Sensor)

The oscillator gyro sensor is used to detect changes in vehicle steering angle.

The gyro is built into the navigation (NAVI) control unit.
BIRDVIEW™
The BIRDVIEW™ provides a detailed and easily seen display of road conditions covering the vehicle's imme-
diate to distant area.

MAP DISPLAY
PKIA0248E
PKIA0249E
SKIA6098E