INFINITI M35 2007 Factory Service Manual

ATC-160
REFRIGERANT LINES
Revision: 2007 April2007 M35/M45
b. Slide a disconnector toward (or upward) vehicle front until it clicks.
c. Slide A/C piping toward (or upward) vehicle front and disconnect it.
CAUTION:
Cap or wrap the joint of condenser, evaporator and high-pressure pipe 1 with suitable material
such as vinyl tape to avoid the entry of air.
5. Remove high-pressure pipe 1.
INSTALLATION
Installation is basically the reverse order of removal.
CAUTION:

Replace O-rings of high-pressure pipe 1 with new ones, and then apply compressor oil to it when
installing it.

Female-side piping connection is thin and easy to deform. Slowly insert the male-side piping
straight in axial direction.

Insert piping securely until a click is heard.

After piping connection is completed, pull male-side piping by hand to make sure that connection
does not come loose.

When recharging refrigerant, check for leaks.
RJIA4168E
High-pressure flexible hose bracket mounting bolt
: 4.2 N·m (0.43 kg-m, 37 in-lb)

REFRIGERANT LINES
ATC-161
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Revision: 2007 April2007 M35/M45
Removal and Installation of Low-pressure Pipe 1 and High-pressure Pipe 2NJS000HS
REMOVAL
1. Set the temperature control switch (passenger side) at 18°C (60°F), and then disconnect the battery cable
from the negative terminal.
2. Use a refrigerant collecting equipment (for HFC-134a) to discharge the refrigerant.
3. Remove cowl top cover. Refer to EI-18, "
COWL TOP" .
4. Remove mounting bolt from low-pressure flexible hose bracket.
5. Remove high-pressure pipe 1 from vehicle clip.
6. Disconnect one-touch joints.
a. Set a disconnector [high-pressure side (SST: 9253089908), low-
pressure side (SST: 9253089916)] on A/C piping.
b. Slide a disconnector toward vehicle front until it clicks.
c. Slide A/C piping toward vehicle front and disconnect it.
CAUTION:
Cap or wrap the joint of low-pressure flexible hose, low-
pressure pipe 1 and high-pressure pipe 1, 2 with suitable
material such as vinyl tape to avoid the entry of air.
7. Remove instrument passenger lower panel and glove box. Refer
to IP-10, "
INSTRUMENT PANEL ASSEMBLY" .
8. Remove foot grille (right). Refer to ATC-148, "
Removal of Foot Grilles" .
9. Remove air mix door motor (passenger side). Refer to ATC-140, "
AIR MIX DOOR MOTOR" .
10. Remove mode door motor (passenger side). Refer to ATC-139, "
MODE DOOR MOTOR" .
11. Remove main link (right) and max. cool door link (right). Refer to ATC-134, "
HEATER & COOLING UNIT
ASSEMBLY" .
12. Remove mounting screws, and then remove evaporator cover.
RJIA4169E
RJIA4117E
RJIA4170E

ATC-162
REFRIGERANT LINES
Revision: 2007 April2007 M35/M45
13. Remove mounting bolt, and then remove low-pressure pipe 1
and high-pressure pipe 2.
CAUTION:
Cap or wrap the joint of expansion valve with suitable mate-
rial such as vinyl tape to avoid the entry of air.
INSTALLATION
Installation is basically the reverse order of removal.
CAUTION:

Replace O-rings of low-pressure flexible hose, low-pressure pipe 1 and high-pressure pipe 1, 2
with new ones, and then apply compressor oil to it when installing it.

Female-side piping connection is thin and easy to deform. Slowly insert the male-side piping
straight in axial direction.

Insert piping securely until a click is heard.

After piping connection is completed, pull male-side piping by hand to make sure that connection
does not come loose.

When recharging refrigerant, check for leaks.
RJIA4171E
Low-pressure flexible hose bracket mounting bolt
: 4.2 N·m (0.43 kg-m, 37 in-lb)

REFRIGERANT LINES
ATC-163
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Revision: 2007 April2007 M35/M45
Removal and Installation of Liquid TankNJS000HT
DISASSEMBLY AND ASSEMBLY
REMOVAL
1. Remove condenser. Refer to ATC-164, "Removal and Installation of Condenser" .
2. Clean liquid tank and its surrounding area, and remove dust and rust from liquid tank.
CAUTION:
Be sure to clean carefully.
3. Remove mounting bolts from liquid tank.
4. Lift liquid tank bracket upward. Remove liquid tank bracket from
protruding part of condenser.
5. Slide liquid tank upward, and then remove liquid tank.
1. Condenser 2. Liquid tank bracket 3. Refrigerant pressure sensor
4. Liquid tank 5. Bracket (liquid tank side) 6. Bracket (condenser side)
7. O-ring 8. Inside pipe 9. Outside pipe
: N·m (kg-m, in-lb)
: Always replace after every disassembly.
PJIA0164E
SJIA1792E
RJIA1440E

ATC-164
REFRIGERANT LINES
Revision: 2007 April2007 M35/M45
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 of liquid tank pipe (inside pipe and outside
pipe) with new ones, and then apply compressor oil to it
when installing it.

When recharging refrigerant, check for leaks.
Removal and Installation of CondenserNJS000HU
REMOVAL
1. Use a refrigerant collecting equipment (for HFC-134a) to discharge the refrigerant.
2. Remove engine cover. Refer to EM-15, "
ENGINE ROOM COVER" (VQ35DE) or EM-173, "ENGINE
ROOM COVER" (VK45DE).
3. Remove air cleaner case, air hose and air duct. Refer to EM-19, "
AIR CLEANER AND AIR DUCT"
(VQ35DE) or EM-177, "AIR CLEANER AND AIR DUCT" (VK45DE).
4. Remove front grille. Refer to EI-16, "
FRONT GRILLE" .
5. Remove radiator fan shroud with cooling fan (VK45DE). Refer to CO-51, "
COOLING FAN" .
6. Remove mounting clips and bolts, and then remove bracket.
7. Remove radiator upper mount, move radiator and condenser to
the engine side.
8. Remove mounting bolt from high-pressure flexible hose bracket.
9. Remove high-pressure pipe1 from vehicle clip.
10. Disconnect high-pressure flexible hose from condenser.
a. Set a disconnector (SST: 9253089912) on A/C piping.
b. Slide a disconnector backward until it clicks.
c. Slide A/C piping backward and disconnect it.
CAUTION:
Cap or wrap the joint of condenser and high-pressure flexi-
ble hose with suitable material such as vinyl tape to avoid
the entry of air.
RJIA1441E
RJIA4173E
RJIA4174E
RJIA4164E

REFRIGERANT LINES
ATC-165
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Revision: 2007 April2007 M35/M45
11. Disconnect high-pressure pipe 1 from condenser.
a. Set a disconnector (SST: 9253089908) on A/C piping.
b. Slide a disconnector upward until it clicks.
c. Slide A/C piping upward and disconnect it.
CAUTION:
Cap or wrap the joint of condenser and high-pressure pipe
1 with suitable material such as vinyl tape to avoid the entry
of air.
12. Disconnect refrigerant pressure sensor connector.
13. Disconnect hood rock switch connector.
14. Remove radiator reservoir tank. Refer to CO-14, "
RADIATOR"
(VQ35DE) or CO-43, "RADIATOR" (VK45DE).
15. Remove mounting screws from condenser.
16. Pull condenser forward at an angle. Remove condenser from
radiator.
CAUTION:
Be careful not to damage the core surface of condenser and
radiator.
RJIA4175E
RJIA4176E
RJIA4177E
RJIA4178E
RJIA4179E

ATC-166
REFRIGERANT LINES
Revision: 2007 April2007 M35/M45
INSTALLATION
Installation is basically the reverse order of removal.
CAUTION:

Replace O-rings of high-pressure pipe 1 and high-pressure flexible hose with new ones, and then
apply compressor oil to it when installing it.

Female-side piping connection is thin and easy to deform. Slowly insert the male-side piping
straight in axial direction.

Insert piping securely until a click is heard.

After piping connection is completed, pull male-side piping by hand to make sure that connection
does not come loose.

When recharging refrigerant, check for leaks.
Removal and Installation of Refrigerant Pressure SensorNJS000HV
REMOVAL
1. Remove liquid tank. Refer to ATC-163, "Removal and Installation of Liquid Tank" .
2. Using a vice, secure liquid tank, and remove refrigerant pres-
sure sensor.
CAUTION:
Be careful not to damage liquid tank.
INSTALLATION
Installation is basically the reverse order of removal.
CAUTION:

Apply compressor oil to O-ring of refrigerant pressure sensor when installing it.

When recharging refrigerant, check for leaks.
RJIA2148E

REFRIGERANT LINES
ATC-167
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Revision: 2007 April2007 M35/M45
Removal and Installation of EvaporatorNJS000HW
REMOVAL
1. Remove low-pressure pipe 1 and high-pressure pipe 2. Refer to ATC-161, "Removal and Installation of
Low-pressure Pipe 1 and High-pressure Pipe 2" .
CAUTION:
Cap or wrap the joint of evaporator, low-pressure flexible hose and high-pressure pipe 1 with suit-
able material such as vinyl tape to avoid the entry of air.
2. Slide evaporator, and then remove it from heater & cooling unit
assembly.
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 low-pressure flexible hose, low-pressure pipe 1 and high-pressure pipe 1, 2
with new ones, and then apply compressor oil to it when installing it.

Female-side piping connection is thin and easy to deform. Slowly insert the male-side piping
straight in axial direction.

Insert piping securely until a click is heard.

After piping connection is completed, pull male-side piping by hand to make sure that connection
does not come loose.

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

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.
RJIA4103E
Low-pressure flexible hose bracket mounting bolt
: 4.2 N·m (0.43 kg-m, 37 in-lb)

ATC-168
REFRIGERANT LINES
Revision: 2007 April2007 M35/M45
Removal and Installation of Expansion ValveNJS000HX
REMOVAL
1. Remove evaporator. Refer to ATC-167, "Removal and Installation of Evaporator" .
2. Remove mounting bolts, and then remove expansion valve.
CAUTION:
Cap or wrap the joint of evaporator 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 flexible hose (high-pressure pipe 1) and low-pressure pipe
1 (high-pressure pipe 2).

When recharging refrigerant, check for leaks.
RJIA1864E

REFRIGERANT LINES
ATC-169
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Revision: 2007 April2007 M35/M45
Checking for Refrigerant LeaksNJS000HY
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 electrical leak detector or fluorescent dye leak
detector (SST: J-42220).
If dye is observed, confirm the leak with an electrical 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 electrical 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 electrical 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 DetectorNJS000HZ
1. Check A/C system for leaks using the UV lamp and safety goggles (SST: 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 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: J-43872) to prevent future
misdiagnosis.
4. Perform a system performance check and verify the leak repair with an approved electrical 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 InjectionNJS000I0
(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 valve.
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 valve.
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.