tank INFINITI FX35 2004 User Guide

ATC-98
TROUBLE DIAGNOSIS
Revision: 2004 November 2004 FX35/FX45
Low-pressure Side Sometimes Becomes Negative
Low-pressure Side Becomes Negative
DIAGNOSTIC PROCEDURE FOR INSUFFICIENT COOLING
SYMPTOM: Insufficient cooling
1. CHECK POWER SUPPLY FOR ECV (ELECTRONIC CONTROL VALVE)
1. Disconnect compressor (ECV) connector.
2. Turn ignition switch ON.
3. Check voltage between compressor harness connector F6 ter-
minal 2 (G) and ground.
OK or NG
OK >> GO TO 2.
NG >> Check power supply circuit and 10A fuse [No. 12,
located in the fuse block (J/B)]. Refer to PG-83, "
FUSE
BLOCK - JUNCTION BOX (J/B)" .
Gauge indication Refrigerant cycle Probable cause Corrective action
Low-pressure side sometimes
becomes negative.

Air conditioning system
does not function and does
not cyclically cool the com-
partment air.

The system constantly func-
tions for a certain period of
time after compressor is
stopped and restarted.Refrigerant does not dis-
charge cyclically.
↓
Moisture is frozen at expan-
sion valve outlet and inlet.
↓
Water is mixed with refriger-
ant.

Drain water from refrigerant
or replace refrigerant.

Replace liquid tank.
AC354A
Gauge indication Refrigerant cycle Probable cause Corrective action
Low-pressure side becomes nega-
tive.
Liquid tank or front/rear side of
expansion valve′s pipe is
frosted or dewed.High-pressure side is closed
and refrigerant does not flow.
↓
Expansion valve or liquid tank
is frosted.Leave the system at rest until
no frost is present. Start it
again to check whether or not
the malfunction is caused by
water or foreign particles.

If water is the cause, initially
cooling is okay. Then the
water freezes causing a
blockage. Drain water from
refrigerant or replace refrig-
erant.

If due to foreign particles,
remove expansion valve
and remove the particles
with dry and compressed air
(not shop air).

If either of the above meth-
ods cannot correct the mal-
function, replace expansion
valve.

Replace liquid tank.

Check lubricant for contami-
nation.
AC362A
2 – ground : Battery voltage
RJIA2294E

REFRIGERANT LINES
ATC-153
C
D
E
F
G
H
I
K
L
MA
B
AT C
Revision: 2004 November 2004 FX35/FX45
Removal and Installation of Liquid TankAJS0015Y
REMOVAL
1. Use a refrigerant collecting equipment (for HFC-134a) to discharge the refrigerant.
2. Remove front grille. Refer to EI-23, "
FRONT GRILLE" .
3. Clean liquid tank and its surrounding area, and remove dirt and rust from tank.
CAUTION:
Be sure to clean carefully.
4. Remove mounting bolts for liquid tank and power steering oil cooler.
5. Lift liquid tank upwards. Remove bracket from protruding part of
condenser.
6. Slide liquid tank upward, and then remove liquid tank.
INSTALLATION
Install liquid tank, and then install liquid tank bracket on condenser.
CAUTION:

Make sure liquid tank bracket is securely installed at protru-
sion of condenser. (Make sure liquid tank bracket does not
move to a position below center of liquid tank.)

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

When recharging refrigerant, check for leaks.Bolts mounting low-pressure pipe 1 bracket and low-pressure flexible hose bracket
Tightening torque : 5.5 N·m (0.56 kg-m, 49 in-lb)
RJIA2074E
RJIA0672E
RJIA0673E

REFRIGERANT LINES
ATC-159
C
D
E
F
G
H
I
K
L
MA
B
AT C
Revision: 2004 November 2004 FX35/FX45
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 (3.52 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-139,
"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 hoses, relief valve and shaft seal.
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. Face mode
c. Intake position: Recirculation
d. Max cold temperature
e. 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.

ATC-160
REFRIGERANT LINES
Revision: 2004 November 2004 FX35/FX45
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.
11. Before connecting recovery/recycling recharging equipment to vehicle, check recovery/recycling recharg-
ing equipment 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 recovery/recycling recharging equipment and refrigerant
identifier.
13. Confirm refrigerant purity in vehicle A/C system using recovery/recycling recharging equipment and refrig-
erant identifier.
14. Discharge A/C system using approved refrigerant recovery equipment. Repair the leaking fitting or com-
ponent as necessary.
15. Evacuate and recharge A/C system and perform the leak test to confirm no refrigerant leaks.
16. Perform A/C performance test to ensure system works properly.
SHA839E

RADIATOR CORE SUPPORT
BL-19
C
D
E
F
G
H
J
K
L
MA
B
BL
Revision: 2004 November 2004 FX35/FX45
RADIATOR CORE SUPPORTPFP:62500
Removal and InstallationAIS004LL
REMOVAL
1. Remove the front fender protector. Refer to EI-25, "Removal and Installation" .
2. Remove the front bumper. Refer to EI-14, "
Removal and Installation" .
3. Remove the ICC. Refer to ACS-67, "
REMOVAL AND INSTALLATION" .
4. Remove the headlamp. Refer to LT- 3 6 , "
Removal and Installation" .
5. Remove the washer tank. Refer to WW-33, "
Removal and Installation of Washer Tank" .
6. Remove the resonator.
7. Remove the power steering oil cooler. Refer to PS-41, "
HYDRAULIC LINE" .
8. Remove the ambient sensor. Refer to AT C - 11 7 , "
Removal and Installation" .
9. Remove the crash zone sensor. Refer to SRS-45, "
Removal and Installation" .
10. Remove the horn connector, blower fan connector and harness clip.
11. Remove the hood lock and disconnect hood lock control cable. Refer to BL-16, "
Removal and Installation
of Hood Lock Control" .
12. Remove the reservoir tank.
13. Remove mounting blots and remove radiator core support. Remove mounting bolts with power tool.
14. After remove radiator core support, remove the horn, cooling fan.
1. Radiator core support assembly 2. Bolt 3. Bolt
4. Horn (High) 5. Air guide (RH) 6. Cooling fan
7. Air guide (LH) 8. Horn (Low)
PIIA6018E

BRAKE FLUID
BR-9
C
D
E
G
H
I
J
K
L
MA
B
BR
Revision: 2004 November 2004 FX35/FX45
BRAKE FLUIDPFP:KN100
On-board InspectionAFS001MV
LEVEL CHECK

Make sure the fluid level in reservoir tank is within the standard
(between MAX and MIN lines).

Visually check around reservoir tank for fluid leaks.

If fluid level is excessively low, check brake system for leaks.

If brake warning lamp remains illuminated after parking lever is
released, check brake system for fluid leakage.
Drain and RefillAFS001MW
CAUTION:

Refill with new brake fluid “DOT3”.

Do not reuse drained brake fluid.

Do not let brake fluid splash on the painted surfaces of the body. This might damage the paint, so
when splashing it, immediately wipe off the area and wash away with water.

Before servicing, disconnect actuator connector or battery negative cable.
1. Connect a vinyl tube to each bleed valve.
2. Depress brake pedal, loosen each bleed valve, and gradually
remove brake fluid.
3. Make sure there is no foreign material in reservoir tank, and refill
with new brake fluid.
4. Rest foot on brake pedal. Loosen bleed valve. Slowly depress
pedal until it stops. Tighten bleed valve. Release brake pedal.
Repeat this process a few times, then pause to add new brake
fluid to master cylinder. Continue until new brake fluid flows out.
Bleed Air. Refer to BR-10, "
Bleeding Brake System" .
SFIA1032E
BRA0007D
SBR995

BR-10
BRAKE FLUID
Revision: 2004 November 2004 FX35/FX45
Bleeding Brake SystemAFS001MX
CAUTION:
While bleeding, pay attention to master cylinder fluid level.
1. Turn ignition switch OFF and disconnect ABS actuator and electric unit (control unit) connector or battery
negative terminal.
2. Connect a vinyl tube to the rear right bleed valve.
3. Fully depress brake pedal 4 to 5 times.
4. With brake pedal depressed, loosen bleed valve to let the air out, and then tighten it immediately.
5. Repeat steps 3, 4 until no more air comes out.
6. Tighten bleed valve to the specified torque. Refer to BR-20, "
Components" (front disc brake), BR-25,
"Components" (rear disc brake).
7. In steps 2 to 6 below, with master cylinder reservoir tank filled at least half way, bleed air from the front left,
rear left, and front right bleed valve, in that order.

BRAKE MASTER CYLINDER
BR-13
C
D
E
G
H
I
J
K
L
MA
B
BR
Revision: 2004 November 2004 FX35/FX45
BRAKE MASTER CYLINDERPFP:46010
On-board InspectionAFS001N2
LEAK INSPECTION

Check for leaking in master cylinder attachment portion, reservoir tank, and brake tube connections.
Removal and InstallationAFS001N3
CAUTION:
Be careful not to splash brake fluid on painted areas; it way cause paint damage. If brake fluid is
splashed on painted areas, wash it away with water immediately.
REMOVAL
1. Drain brake fluid. Refer to BR-9, "Drain and Refill" .
2. Disconnect harness connectors for fluid level sensor and pressure sensor.
3. Using a flare nut wrench, disconnect brake tube from master cylinder assembly.
4. Remove master cylinder assembly fixing nut, remove master cylinder assembly from the vehicle. Refer to
BR-16, "
Removal and Installation" .
INSTALLATION

Install in the reverse order of removal.
–Refill brake fluid and bleed air. Refer to BR-10, "Bleeding Brake System" .
CAUTION:

Refill with new brake fluid “DOT3”.

Do not reuse drained brake fluid.
ComponentsAFS001N4
SFIA2157E

BR-14
BRAKE MASTER CYLINDER
Revision: 2004 November 2004 FX35/FX45
Disassembly and AssemblyAFS001N5
DISASSEMBLY
CAUTION:

Master cylinder can not be disassembly.

Remove reservoir tank only when absolutely necessary.
1. Remove clip.
2. Remove reservoir tank and grommet from master cylinder
assembly.
ASSEMBLY
CAUTION:

Never use mineral oil such as kerosene, gasoline during the cleaning and assembly process.

Do not drop parts. If a part is dropped, do not use it.
1. Apply brake fluid grommet and attach to master cylinder assembly.
CAUTION:
Do not reuse grommet.
2. Install reservoir tank onto master cylinder assembly.
3. Install clip.
1. Reservoir cap 2. Strainer 3. Float
4. Reservoir tank 5. Grommet 6. Master cylinder sub-assembly
7. Clip 8. Pressure sensor 9. Pressure sensor (Only ICC models)
SFIA1132E
SFIA1132E

BR-16
BRAKE BOOSTER
Revision: 2004 November 2004 FX35/FX45
Removal and InstallationAFS001N7
REMOVAL
CAUTION:

Be careful not to deform or bend brake piping while removing and installing brake booster.

Replace clevis pin if it is damaged.

Be careful not to damage brake booster stud bolt threads. If brake booster is tilted or inclined dur-
ing installation, dash panel may damage the threads.

Attach the check valve in the correct direction.
1. Remove brake piping from brake master cylinder.
2. Remove brake master cylinder. Refer to BR-13, "
Removal and Installation" .
3. Remove vacuum hose from brake booster. Refer to BR-18, "
VACUUM LINES" .
4. Disconnect harness connector from brake booster assembly. (ICC model)
5. Remove brake pedal attachment snap pin and clevis pin from inside the vehicle.
6. Remove nuts on brake booster and brake pedal assembly.
7. Remove brake booster assembly from dash panel.
INSPECTION AFTER REMOVAL
Output Rod Length Inspection
1. Using a handy vacuum pump, apply a vacuum of – 66.7 kPa (–
500 mmHg, –19.69 inHg) to brake booster.
2. Check output rod length.
1. Reservoir tank 2. Master cylinder 3. Gasket
4. Brake pedal 5. Lock nut 6. Brake booster
SFIA1033E
Standard dimension when vacuum
-66.7kpa (500mmHg, -19.69inHg):
15.6 − 15.9 mm (0.614 − 0.626 in)
SFIA2146E