2008 INFINITI FX35 no start

ATC-72
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
3. Check continuity between BCM harness connector M3 terminal27 and unified meter and A/C amp. harness connector M57 ter-
minal 42.
OK or NG
OK >> GO TO 7.
NG >> Repair harness or connector.
7.CHECK VOLTAGE FOR UNIFIED METER AND A/C AMP. (COMPRESSOR ON SIGNAL)
1. Reconnect BCM connector and unified meter and A/C amp. connector.
2. Turn ignition switch ON.
3. Check voltage between unified meter and A/C amp. harness connector M57 terminal 42 and ground using an oscilloscope.
OK or NG
OK >> GO TO 8.
NG-1 >> If the voltage is approx. 5 V when A/C switch is ON: Replace unified meter and A/C amp.
NG-2 >> If the voltage is approx. 0 V w hen A/C switch is OFF: Replace BCM.
8.CHECK REFRIGERANT PRESSURE SENSOR
WITH CONSULT-III
1. Start the engine.
2. Check voltage of refrigerant pressure sensor in “Data monitor”. Refer to EC-127, "
CONSULT-III Reference
Value in Data Monitor Mode" (VQ35DE) or EC-705, "CONSULT-III Reference Value in Data Monitor
Mode" (VK45DE).
WITHOUT CONSULT-III
1. Start the engine. 27 – 42 : Continuity should exist.
RJIA2006E
RJIA2007E
Te r m i n a l s
Condition Voltage
(+)
(− )
Unified meter
and A/C amp.
connector Te r m i n a l
No.
M57 42 Ground A/C switch: ON
(Blower motor operates.)
Approx. 0 V
OFF switch: ON
(A/C system: OFF)
SJIA1423J
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ATC-80
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
Low-pressure Side Sometimes Becomes Negative
Low-pressure Side Becomes Negative
Gauge indication Refrigerant cycle Probable cause Corrective action
Both high- and low-pressure sides
are too low.  There is a big temperature
difference between liquid
tank outlet and inlet. Outlet
temperature is extremely
low.
 Liquid tank inlet and expan-
sion valve are frosted. Liquid tank inside is slightly
clogged.
 Replace liquid tank.
 Check lubricant for contami-
nation.
 Temperature of expansion valve inlet is extremely low
as compared with areas
near liquid tank.
 Expansion valve inlet is frosted.
 Temperature difference oc- curs somewhere in high-
pressure side. High-pressure pipe located be-
tween liquid tank and expan-
sion valve is clogged.
 Check and repair malfunc-
tioning parts.
 Check lubricant for contami- nation.
Expansion valve and liquid
tank are warm or slightly cool
when touched. Low refrigerant charge.
↓
Leaking fittings or compo-
nents.
Check refrigerant for leaks.
Refer to
ATC-138, "
Checking
of Refrigerant Leaks".
There is a big temperature dif-
ference between expansion
valve inlet and outlet while the
valve itself is frosted. Expansion valve closes a little
compared with the specifica-
tion.
↓
1. Improper expansion
valve adjustment.
2. Malfunctioning expansion
valve.
3. Outlet and inlet may be clogged.  Remove foreign particles by
using compressed air.
 Replace expansion valve.
 Check lubricant for contami-
nation.
An area of the low-pressure
pipe is colder than areas near
the evaporator outlet. Low-pressure pipe is clogged
or crushed.  Check and repair malfunc-
tioning parts.
 Check lubricant for contami- nation.
Air flow volume is not enough
or is too low. Evaporator is frozen.  Check intake sensor circuit.
Refer to AT C - 9 4 , "
Intake
Sensor Circuit".
 Replace compressor.
 Repair evaporator fins.
 Replace evaporator.
Refer to AT C - 6 4 , "
Blower
Motor Circuit".
AC353A
Gauge indication Refrigerant cycle Probable cause Corrective action
Low-pressure side sometimes be-
comes negative.  Air conditioning system does
not function and does not cy-
clically cool the compart-
ment air.
 The system constantly func- tions for a certain period of
time after compressor is
stopped and restarted. Refrigerant does not discharge
cyclically.
↓
Moisture is frozen at expan-
sion valve outlet and inlet.
↓
Water is mixed with refrigerant.
 Drain water from refrigerant
or replace refrigerant.
 Replace liquid tank.
AC354A
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TROUBLE DIAGNOSISATC-81
< SERVICE INFORMATION >
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DIAGNOSIS 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 (ECV) harness connector F6 terminal 2 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-77
.
 If fuse is OK, check harness for open circuit. Repair or replace if necessary.
 If fuse is NG, check harness for short circuit and replace fuse.
2.CHECK ECV CONTROL SIGNAL
1. Turn ignition switch OFF.
2. Reconnect compressor (ECV) connector.
3. Perform self-diagnosis. Refer to ATC-43, "
Self-Diagnosis Function".
4. Set in self-diagnosis STEP-4 (Code No. 45). Refer to ATC-43, "
Self-Diagnosis Function".
5. Confirm ECV control signal between unified meter and A/C amp. harness connector M57 terminal 45 and ground using an oscillo-
scope.
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 frost-
ed or wet with dew.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 wa-
ter freezes causing a block-
age. Drain water from
refrigerant or replace refrig-
erant.
 If due to foreign particles, re-
move 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
RJIA2295E
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REFRIGERANT LINESATC-139
< SERVICE INFORMATION >
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4. Perform a system performance check and verify the l eak 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 InjectionINFOID:0000000001328233
(This procedure is only necessary when recharging t he 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 refr igerant dye into the injector tool (SST: J-41459).
3. Connect the injector tool to the A/C low-pressure side service valve.
4. Start the 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 inje ctor 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 componen t, pour the dye directly into the open system
connection and proceed wi th 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.
Electrical Leak DetectorINFOID:0000000001328234
PRECAUTIONS FOR HANDLING LEAK DETECTOR
When performing a refrigerant leak check, use an A/C electrical leak
detector (SST) or equivalent. Ensure that the instrument is calibrated
and set properly per the operating instructions.
The leak detector is a delicate device. In order to use the leak detec-
tor properly, read the operating instructions and perform any speci-
fied maintenance.
1. Position probe approximately 5 mm (3/16 in) away from point to
be checked.
SHA196FA
SHA707EA
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REFRIGERANT LINESATC-141
< SERVICE INFORMATION >
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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 the engine.
8. Set the 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 the engine and perform leak check again following steps 4 through 6 above.
Refrigerant leaks should be chec ked 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 equipm ent 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 us ing recovery/recycling recharging equipment and refrig-
erant identifier.
14. Discharge A/C system using approved refrigerant recove ry equipment. Repair the leaking fitting or com-
ponent if necessary.
15. Evacuate and recharge A/C system and perform the l eak test to confirm no refrigerant leaks.
16. Perform A/C performance test to ensure system works properly.
SHA839E
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AUDIOAV-35
< SERVICE INFORMATION >
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STARTING THE SELF-DIAGNOSIS MODE
1. Turn ignition switch from OFF to ACC.
2. Within 10 seconds press and hold the switches “1” and “6” simultaneously for 3 seconds.
DIAGNOSIS FUNCTION
The following are checked: All the indicators (LED) in the A/C and AV switch.
 Continuity of the switches by sounding the buzze r when the A/C and AV switch and audio steering wheel
switch is pressed.
 Continuity of harness between A/C and AV switch and audio steering switch.
NOTE:
Rear window defogger switch operation is not checked. (No beep sound even under normal status)
EXITING THE SELF-DIAGNOSIS MODE
 Turn ignition switch OFF.
Trouble DiagnosisINFOID:0000000001328684
 The majority of the audio malfunctions are the result of outside causes (bad CD, electromagnetic interfer-
ence, etc.). Check the symptoms below to diagnose the malfunction.
 The vehicle itself can be a source of noise if noise prevention parts or electrical equipment is malfunctioning.
Check if noise is caused and/or changed by engine speed, ignition switch turned to each position, and oper-
ation of each piece of electrical equipment, and then determine the cause.
 Make sure that other operation except audio system can be performed with A/C and AV switch. If these
operations are inoperative with A/C and AV switch, refer to AV-79, "
Unable to Operate System with A/C and
AV Switch" (Without navigation system), or AV-127, "Unable to Operate System with A/C and AV Switch"
(With navigation system).
 Refer to "SERVICE BULLETIN ITB04-055" for the diagnosis of satellite radio.
SKIB8660E
Symptom Possible malfunction location
Audio system does not work properly.  Audio unit power supply circuit
 Communication signal circuit between audio unit and display control unit
 A/C and AV switch
 Audio unit
No sound can be heard from all speakers.  BOSE speaker amp. power supply and ground circuit
 BOSE speaker amp. ON signal circuit
 Audio unit
 BOSE speaker amp.
No sound can be heard from one or several speakers.  Audio signal circuit between audio unit and BOSE speaker amp.
 Audio signal circuit between BOSE speaker amp. and speaker
 Speaker
Tweeter
 Audio unit
 BOSE speaker amp.
No sound can be heard from woofer.  Audio signal circuit between BOSE speaker amp. and woofer
Woofer
 BOSE speaker amp.
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AUDIOAV-37
< SERVICE INFORMATION >
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2. Check voltage between BOSE speaker amp. harness connector terminal or woofer harness connector terminal and ground.
OK or NG
OK >>  INSPECTION END (Audio unit is OK.)  GO TO 3. (BOSE speaker amp. and woofer)
NG >> Repair harness or connector between each unit and fuse.
3.CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BOSE speaker amp. and woofer connectors.
3. Check continuity between BOSE speaker amp. harness connec-
tor B212 terminal 17 and ground.
4. Check continuity between woofer harness connector B223 ter- minal 2 and ground.
OK or NG
OK >> INSPECTION END (System is OK.)
NG >> Repair harness or connector.
Audio Steering Wheel Switch InspectionINFOID:0000000001328686
1.CHECK A/C AND AV SWITCH SELF-DIAGNOSIS FUNCTION
1. Start A/C and AV switch self-diagnosis function. Refer to AV-34, "
A/C and AV Switch Self-Diagnosis Func-
tion".
2. Operate audio steering wheel switch.
Does audio steering wheel switch operate normally?
YES >> INSPECTION END
Te r m i n a l s
Ignition
switch Vo l ta g e
(+)
(–)
Connector Terminal
B212 1 Ground OFF Battery voltage
B223 1 Ground OFF Battery voltage
SKIA8931E
17 – Ground : Continuity should exist.
SKIA4312E
2 – Ground : Continuity should exist.
SKIB8692E
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AUDIOAV-39
< SERVICE INFORMATION >
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2. Check continuity between spiral cable connector M15 terminals 24, 31, 32 and spiral cable connector M203 terminals 20, 17, 16.
OK or NG
OK >> GO TO 6.
NG >> Replace spiral cable.
6.CHECK AUDIO STEERING WHEEL SWITCH RESISTANCE
Check resistance audio steering wheel switch terminals.
 *1: Without telephone system
 *2: With telephone system
OK or NG
OK >> INSPECTION END
NG >> Replace audio steering wheel switch.
A/C and AV Switch InspectionINFOID:0000000001328687
1.A/C AND AV SWITCH SELF-DIAGNOSIS FUNCTION
1. Start A/C and AV switch self-diagnosis function. Refer to AV-34, "
A/C and AV Switch Self-Diagnosis Func-
tion".
2. Operate A/C and AV switch.
Does the A/C and AV switch is operated normally?
YES >> INSPECTION END (System is OK)
NO >> Replace A/C and AV switch.
BOSE Speaker Amp. InspectionINFOID:0000000001328688
1.CHECK HARNESS
1. Turn ignition switch OFF.
2. Disconnect audio unit and BOSE speaker amp. connectors. 24 – 20 : Continuity should exist.
31 – 17 : Continuity should exist.
32 – 16 : Continuity should exist.
SKIA5874E
Terminal Signal name Condition
Resistance
(Ω )
16 17Power
*1Depress power switch. Approx. 0
Mode
*2Depress mode switch. Approx. 0
Seek down Depress (station) down switch. Approx. 165
Volume (down) Depress volume down switch. Approx. 652
20 Mode
*1Depress mode switch. Approx. 0
PTT
*2Depress PTT switch. Approx. 0
Seek up Depress (station) up switch. Approx. 165
Volume (up) Depress volume up switch. Approx. 652
SKIA5010E
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