2006 INFINITI M35 light

ATC-106
TROUBLE DIAGNOSIS
Revision: 2006 January2006 M35/M45
High-pressure Side is Too Low and Low-pressure Side is Too High
Both High- and Low-pressure Sides are Too Low
Gauge indication Refrigerant cycle Probable cause Corrective action
High-pressure side is too low and
low-pressure side is too high.High- and low-pressure sides
become equal soon after com-
pressor operation stops.Compressor pressure opera-
tion is improper.
Damaged inside compressor
packings.Replace compressor.
No temperature difference
between high- and low-pres-
sure sides.Compressor pressure opera-
tion is improper.
Damaged inside compressor
packings.Replace compressor.AC356A
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 may
be frosted.
Temperature difference
occurs somewhere in high-
pressure side.High-pressure pipe located
between liquid tank and
expansion 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-170, "Checking
for 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 ATC-122, "
Intake
Sensor Circuit" .
Replace compressor.
Repair evaporator fins.
Replace evaporator.
Refer to AT C - 8 9 , "Blower
Motor Circuit" .
AC353A

TROUBLE DIAGNOSIS
ATC-119
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AT C
Revision: 2006 January2006 M35/M45
Sunload Sensor CircuitNJS000H2
COMPONENT DESCRIPTION
Sunload Sensor
The sunload sensor is located on the driver’s side front defroster
grille. It detects sunload entering through windshield by means of a
photo diode. The sensor converts the sunload into a current value
which is then input into the unified meter and A/C amp.
SUNLOAD INPUT PROCESS
The unified meter and A/C amp. also includes a processing circuit which averages the variations in detected
sunload over a period of time. This prevents drastic swings in the ATC system operation due to small or quick
variations in detected sunload.
For example, consider driving along a road bordered by an occasional group of large trees. The sunload
detected by the sunload sensor will vary whenever the trees obstruct the sunlight. The processing circuit aver-
ages the detected sunload over a period of time, so that the (insignificant) effect of the trees momentarily
obstructing the sunlight does not cause any change in the ATC system operation. On the other hand, shortly
after entering a long tunnel, the system will recognize the change in sunload, and the system will react accord-
ingly.
DIAGNOSIS PROCEDURE FOR SUNLOAD SENSOR
SYMPTOM: Sunload sensor circuit is open or shorted. (25 or 25 is
indicated on unified meter and A/C amp. as a result of performing
self-diagnosis STEP-2.)
1. CHECK VOLTAGE BETWEEN SUNLOAD SENSOR AND GROUND
1. Disconnect sunload sensor connector.
2. Turn ignition switch ON.
3. Check voltage between sunload sensor harness connector M87
terminal 1 and ground.
OK or NG
OK >> GO TO 2.
NG >> GO TO 4.
RJIA4098E
RJIA4099E
1 – Ground : Approx. 5 V
RJIA2027E

ATC-170
REFRIGERANT LINES
Revision: 2006 January2006 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.

AV-66
[WITHOUT MOBILE ENTERTAINMENT SYSTEM]
TERMINALS AND REFERENCE VALUE FOR CONTROL UNIT
Revision: 2006 January2006 M35/M45
TERMINALS AND REFERENCE VALUE FOR CONTROL UNITPFP:00000
Audio Unit for Base SystemNKS0048L
Te r m i n a l
(Wire color)
ItemSignal
input/
outputCondition
Reference value
+–Ignition
switchOperation
2
(P)
*1
(R/L)*2
3
(W)Audio signal front LH
Output ON Receive audio signal.
4
(V)
*1
(LG)*2
5
(SB)Audio signal rear LH
6
(BR)15
(G)Steering switch signal A Input ONKeep pushing SOURCE
switch.Approx. 0 V
Keep pushing MENU UP
switch.Approx. 1.2 V
Keep pushing MENU DOWN
switch.Approx. 2.5 V
Keep pushing ENTER
switch.Approx. 3.7 V
Except for above. Approx. 5 V
7
(V)Ground ACC power supply Input ACC
Battery voltage
8
(R/Y)Ground Illumination control signal Input OFFIllumination control switch is
operated by lighting switch
in ON position.Change between approx. 0 V
and approx. 12 V
9
(R)Ground Illumination signal Input OFFLighting switch is OFF. Approx. 0 V
Lighting switch is ON. Approx. 12 V
11
(BR)
*1
(P)*2
12
(R)*1
(L)*2Audio signal front RH
Output ON Receive audio signal.
13
(Y)14
(P)Audio signal rear RH
15
(G)GroundSteering switch signal
ground– ON – Approx. 0 V
16
(O)15
(G)Steering switch signal B Input ONKeep pushing VOL DOWN
switch.Approx. 0 V
Keep pushing VOL UP
switch.Approx. 1.2 V
Keep pushing TEL switch. Approx. 2.5 V
Keep pushing BACK switch. Approx. 3.7 V
Except for above. Approx. 5 V
19
(Y)Ground Battery power supply Input OFF
Battery voltage
20
(B)Ground Ground – ON – Approx. 0 V
23
(R)
*1
(Y)*2–Communication signal
(H)Input/
Output–– –
SKIB3609E
SKIB3609E

AV-68
[WITHOUT MOBILE ENTERTAINMENT SYSTEM]
TERMINALS AND REFERENCE VALUE FOR CONTROL UNIT
Revision: 2006 January2006 M35/M45
*1: 2WD models without navigation system and RAS
*2: Except *1
Audio Unit for BOSE SystemNKS0048M
51
(R)GroundCommunication signal
(SAT-AUDIO)Input ON Satellite radio mode is ON.
53 Ground Antenna amp ON signal Output ON
Approx. 12 V
54 – AM-FM main Input – – –
55 – FM sub Input – – –Te r m i n a l
(Wire color)
ItemSignal
input/
outputCondition
Reference value
+–Ignition
switchOperation
SKIB3824E
Te r m i n a l
(Wire color)
ItemSignal
input/
outputCondition
Reference value
+–Ignition
switch Operation
2
(R/L)3
(W)Audio signal LH Output ON Receive audio signal.
6
(BR)15
(G)Steering switch signal A Input ONKeep pushing SOURCE
switch.approx. 0 V
Keep pushing MENU UP
switch.Approx. 1.2 V
Keep pushing MENU DOWN
switch.Approx. 2.5 V
Keep pushing ENTER
switch.Approx. 3.7 V
Except for above. Approx. 5 V
7
(V)Ground ACC power supply Input ACC
Battery voltage
8
(R/Y)Ground Illumination control signal Input OFFIllumination control switch is
operated by lighting switch
in ON position.Change between approx. 0 V
and approx. 12 V
9
(R)Ground Illumination signal Input OFFLighting switch is OFF. Approx. 0 V
Lighting switch is ON. Approx. 12 V
11
(P)12
(L)Audio signal RH Output ON Receive audio signal.
SKIB3609E
SKIB3609E

TERMINALS AND REFERENCE VALUE FOR CONTROL UNIT
AV-77
[WITHOUT MOBILE ENTERTAINMENT SYSTEM]
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AV
Revision: 2006 January2006 M35/M45
51
(W)GroundHorizontal synchronizing
(HP) signalInput ON –
52
(R)GroundVertical synchronizing
(VP) signalInput ON –
53
(O/L)GroundCommunication signal
(CONT-DISP)Input ONWhen adjusting display
brightness.
54
(W/L)GroundCommunication signal
(DISP-CONT)Input ONWhen adjusting display
brightness.
55 – Shield – – – –
61
(LG)Ground Illumination signal Input OFFLighting switch is OFF. Approx. 0 V
Lighting switch is ON. Approx. 12 V
63
(Y/G)Ground Ignition signal Input ON – Battery voltage
64
(P)Ground Parking brake signal Input ONParking brake ON. Approx. 0 V
Parking brake OFF. Approx. 12 V
65
(O)Ground Reverse signal Input ONSelect lever in R position. Approx. 12 V
Other than selector lever in
R position.Approx. 0 V
66
(G)GroundVehicle speed signal
(8-pulse)Input ONWhen vehicle speed is
approx. 40 km/h (25 MPH). Terminal
(Wire color)
ItemSignal
Input/
outputCondition
Reference value
+–Ignition
switchOperation
SKIB3601E
SKIB3598E
PKIB5039J
PKIB5039J
SKIA6649J

TERMINALS AND REFERENCE VALUE FOR CONTROL UNIT
AV-81
[WITHOUT MOBILE ENTERTAINMENT SYSTEM]
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AV
Revision: 2006 January2006 M35/M45
15
(Y)–Communication signal
(H)Input/
Output–– –
16
(W)–Communication signal
(H)Input/
Output–– –
17
(B)Ground Ground – ON – Approx. 0 V
18
(R/L)Ground Illumination signal Input OFFLighting switch is OFF. Approx. 0 V
Lighting switch is ON. Approx. 12 V
19 – Shield – – – –
20
(G)Ground DVD / AUX image signal Output ON DVD image
23
(R)22
(B)AUX sound signal LH Input ON AUX sound input
24 – Shield – – – –
27
(B/R)11
(BR)Sound signal LH Output ON Sound output
28
(B/W)12
(L)Sound signal RH Output ON Sound output
30 – Shield – – – –
31
(O)–Communication signal
(L)Input/
Output–– –
32
(R)–Communication signal
(L)Input/
Output–– –
33
(R/Y)– Shield – – – – Terminal
(Wire color)
ItemSignal
input/
outputCondition
Reference value
+–Ignition
switchOperation
SKIB2251J
SKIB3609E
SKIB3609E
SKIB3609E

DIAGNOSIS SYSTEM
AV-87
[WITHOUT MOBILE ENTERTAINMENT SYSTEM]
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AV
Revision: 2006 January2006 M35/M45
On Board Diagnosis Item
*1: With navigation system
*2: With rear view monitor
STARTING PROCEDURE
1. Start the engine.
2. Turn the audio system OFF.
3. While pushing the “SETTING” button, turn the volume control
dial clockwise or counterclockwise for 40 clicks or more. (When
the self-diagnosis mode is started, a short beep will be heard.)
Shifting from current screen to previous screen is performed
by pushing “BACK” button.
Mode Description
Self Diagnosis
AV (NAVI) control unit diagnosis and connection diagnosis between
AV (NAVI) control unit and each unit
The DVD-ROM drive diagnosis of NAVI control unit and the connec-
tion diagnosis between NAVI control unit and GPS antenna can be
performed
(DVD-ROM drive will not be diagnosed when no map DVD-ROM is in
it.)
Confirmation/
AdjustmentDisplay DiagnosisThe tint can be confirmed by the color spectrum bar display. The shad-
ing of color can be confirmed by the gradation bar display.
Vehicle SignalsDiagnosis of signals can be performed for vehicle speed, parking brake,
lights, ignition switch, and reverse.
Speaker Test The connection of a speaker can be confirmed by test tone.
Climate Control Start auto air conditioner system self-diagnosis.
Navigation
*1
Steering Angle
AdjustmentWhen there is a difference between the actual turning angle and the
vehicle mark turning angle, it can be adjusted.
Speed CalibrationWhen there is a difference between the current location mark and the
actual location, it can be adjusted.
Error HistoryThe system malfunction and the frequency when occurred in the past
are displayed. When the malfunctioning item is selected, the time and
place that the selected malfunction last occurred are displayed.
Synchronizer FES clock -
Vehicle CAN Diagnosis The transmitting/receiving of CAN communication can be monitored.
AV COMM DiagnosisThe communication condition of each unit of Multi AV system can be
monitored.
Handsfree PhoneThe received volume adjustment of hands-free phone, microphone
speaker check, and erase memory can be performed.
Camera Cont.
*2The signal connected to camera control unit can be checked and the
guiding line position that overlaps rear view camera image can be
adjusted.
Bluetooth The passkey and the name of device can be checked and changed
Delete Unit Connection Log Erase the connection history of unit and error history
SKIB3655E