2004 INFINITI FX35 air conditioner

AV-74
INTEGRATED DISPLAY SYSTEM
Revision: 2004 November 2004 FX35/FX45
On Board Self-Diagnosis FunctionAKS00BOF
DESCRIPTION

Diagnosis function consists of the self-diagnosis mode performed automatically.

Self-diagnosis mode checks for connections between the units constituting this system, analyzes each
individual unit at the same time, and displays the results on the LCD screen.
DIAGNOSIS ITEM
Self-Diagnosis ModeAKS00BOG
OPERATION PROCEDURES
1. Start the engine.
2. Turn the audio system off.
3. While pressing the “MUTE/II ” switch, turn the volume control
dial clockwise or counterclockwise for 30 clicks or more. (When
the self-diagnosis mode is started, a short beep will be heard.)
4. Display unit connection check screen.
13 (G/W) GroundRemote con-
troller BInput ONPress POWER
switch.Approx. 0V
Audio steering
wheel switches
do not function. Press SEEK
DOWN switch.Approx. 1.7V
Press VOL DOWN
switch.Approx. 3.3V
Except for above Approx. 5V
14 (B/Y) -Remote con-
troller ground-- - -Audio steering
wheel switches
do not function. Terminal No.
(Wire color)
ItemSignal
input/
outputCondition
VoltageExample of
symptom
+–Ignition
switchOperation
Mode Item Description Reference page
Self-diagnosisNETWORK CHECKCheck network between control unit and switch connected
from display unit via communication line.AV-75, "
NETWORK CHECK"
PARTS CHECK
Perform diagnosis and setting of display unit.

Perform self-diagnosis for auto air conditioner system.AV- 7 6 , "PARTS CHECK"
VERSION CHECK Displays version of each unit.AV- 7 6 , "VERSION CHECK"
CAN DIAG MNTR Display unit displays CAN communication status.AV- 7 6 , "CAN DIAG MNTR
(CAN DIAG MONITOR)"
SKIA4971E

AV-76
INTEGRATED DISPLAY SYSTEM
Revision: 2004 November 2004 FX35/FX45
PARTS CHECK

Selecting PARTS CHECK on self-diagnosis screen, display
selection screen.

Select DISPLAY, indicate DISPLAY DETAIL screen. Display
diagnosis and setting can be performed.

Select HVAC, Indicate HVAC DETAIL screen. Auto air condi-
tioner system self-diagnosis can be performed.
DISPLAY DETAIL SCREEN
NOTE:
Except an audio screen.
HVAC DETAIL SCREEN
Press the joystick, start auto air conditioner system self-diagnosis.
Refer to AT C - 5 3 , "
Self-diagnosis Function" .
VERSION CHECK
Check ID and version of display, A/C and AV switch, audio, IVCS, changer and Satellite Radio.
CAN DIAG MNTR (CAN DIAG MONITOR)
Display CAN communication status.
SKIA5924E
Items Description
FULL BLINK All display unit segments turn ON.
BLANK–ADJAdjust the display time-out for 5 to 15 seconds. (Default is
10 seconds.)
Note
WARNING Select warning indication ON/OFF. (Default is ON.)
SKIA5925E
SKIA5926E
Items shown Contents
CANCOMM OK/NG
CAN1 OK/UNKWN
CAN2 OK/UNKWN
CAN3 OK/UNKWN
CAN4 OK/UNKWN
CAN5 OK/UNKWN
CAN6 OK/UNKWN
CAN7 OK/UNKWN
CAN8 OK/UNKWN
CAN9 OK/UNKWN
SKIA5927E

AV-78
INTEGRATED DISPLAY SYSTEM
Revision: 2004 November 2004 FX35/FX45
Trouble Diagnosis Chart by SymptomAKS00BOI
Symptom Check item
No screen is shown.

Display unit power supply and ground circuit. Refer to AV- 7 9 , "Power Supply
and Ground Circuit Check for Display Unit" .

Display unit
Screen does not switch to nighttime mode after the
lighting switch is turned ON.

Illumination signal. Refer to AV-81, "Illumination Signal Inspection" .

Display unit
TRIP and FUEL ECON screen do not appear.

Ignition signal. Refer to AV- 8 2 , "Ignition Signal Inspection" .

Display unit

Trip odometer (DIST) is not added up.

Average vehicle speed (AVG) is not displayed.

Vehicle speed signal. Refer to AV- 8 0 , "Vehicle Speed Signal Inspection" .

Display unit
Average fuel consumption (AVG) is not displayed.

Vehicle speed signal. Refer to AV- 8 0 , "Vehicle Speed Signal Inspection" .

CAN communication line. Refer to AV- 8 5 , "CAN Communication Line Inspec-
tion" .

Display unit
Distance to empty (DTE) is not displayed.

Check if speedometer operates. If it does not operate, go to DI-17, "Vehicle
Speed Signal Inspection" .

Check if fuel gauge operates. If it does not operate, go to DI-20, "Fuel Level
Sensor Signal Inspection 1" .

CAN communication line. Refer to DI-22, "Communication Line Inspection" .

Display unit
Tire pressure is not displayed.

Ignition signal. Refer to AV- 8 2 , "Ignition Signal Inspection" .

Low tire pressure warning control unit. Refer to WT-17, "Self-Diagnosis" .

CAN communication line. Refer to DI-22, "Communication Line Inspection" .

Display unit
Door warning screen does not appear.

Ignition signal. Refer to AV- 8 2 , "Ignition Signal Inspection" .

Vehicle speed signal. Refer to AV- 8 0 , "Vehicle Speed Signal Inspection" .

CAN communication line. Refer to AV- 8 5 , "CAN Communication Line Inspec-
tion" .

Display unit
A/C and AV switch and all switch operation are not
possible.
(Do not start self-diagnosis.)Refer to AV-84, "
A/C and AV Switch Does Not Operate" .
Air conditioner operation is not possible.

A/C and AV switch. Refer to AV-41, "A/C and AV Switch Inspection" .

CAN communication line. Refer to AV- 8 5 , "CAN Communication Line Inspec-
tion" .

NAVIGATION SYSTEM
AV-137
C
D
E
F
G
H
I
J
L
MA
B
AV
Revision: 2004 November 2004 FX35/FX45

When RGB signal error occurred in the RGB system, tone of the color bar will change as follows.

When the color of the screen looks unusual, refer to AV- 1 6 2 , "Color of RGB Image is Not Proper (All
screens Looks Bluish)" ,AV- 1 6 3 , "Color of RGB Image is Not Proper (All Screens Looks Reddish)" and
AV- 1 6 4 , "
Color of RGB Image is Not Proper (All Screens Looks Yellowish)" .
VEHICLE SIGNALS

A comparison check can be made of each actual vehicle signal
and the signals recognized by the system.
CAUTION:
In case of confirming light signal, set D/N mode to ON/OFF
of lighting switch (normal setting).

OFF: D (Day mode)

ON: N (Night mode)
Unless above setting, light signal (ON/OFF) may not be
accurately displayed.

If vehicle speed is NG, refer to AV- 1 5 0 , "Vehicle Speed Signal Check for Display Control Unit" .

If light is NG, refer to AV- 1 5 2 , "Illumination Signal Check for Display Control Unit" .

If IGN is NG, refer to AV- 1 5 2 , "Ignition Signal Check for Display Control Unit" .

If reverse is NG, refer to AV- 1 5 3 , "Reverse Signal Check for Display Control Unit" .
AUTO CLIMATE CONTROL

Refer to ATC Automatic Air Conditioner AT C - 5 3 , "Self-diagnosis Function" for details. R (red) signal error : Screen looks bluish
G (green) signal error : Screen looks reddish
B (blue) signal error : Screen looks yellowish
SKIA5628E
Diagnosis item Display Condition Remarks
Vehicle speedON Vehicle speed > 0 MPH (0 km/h)
Changes in indication may be delayed by
approx. 1.5 seconds. This is normal. OFF Vehicle speed = 0 MPH (0 km/h)
– Ignition switch in ACC position
IGNON Ignition switch ON
–
OFF Ignition switch ACC
ReverseON Selector lever in R position
Changes in indication may be delayed by
approx. 1.5 seconds. This is normal. OFF Selector lever except R position
– Ignition switch in ACC position
LightON Lighting switch ON
–
OFF Lighting switch OFF

RADIATOR
CO-15
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
MA
CO
Revision: 2004 November 2004 FX35/FX45
8. Rotate two radiator upper mount brackets 90 degrees in the
direction shown in the figure, and remove them.
9. Lift up and remove radiator.
CAUTION:
Do not damage or scratch air conditioner condenser and
radiator core when removing.
INSTALLATION
Install in the reverse order of removal.
INSPECTION AFTER INSTALLATION

Check for leaks of engine coolant using radiator cap tester adapter [SST: EG17650301 (J-33984-A)] and
radiator cap tester (commercial service tool). Refer to CO-11, "
CHECKING COOLING SYSTEM FOR
LEAKS" .

Start and warm up engine. Visually make sure that there is no leaks of engine coolant and A/T fluid.
Checking Radiator CapABS008FW
1. Pull radiator cap negative-pressure valve to open it, and make
sure it close completely when released.

Make sure there is no dirt or damage on valve seat of radiator
cap negative-pressure valve.

Make sure there are no unusualness in the opening and clos-
ing conditions of radiator cap negative-pressure valve.
2. Check radiator cap relief pressure.

When connecting radiator cap to radiator cap tester adapter
(SST) and radiator cap tester (commercial service tool), apply
engine coolant to the cap seal part.

Replace radiator cap if there is an unusualness in radiator cap
negative-pressure valve, or if the open-valve pressure is out-
side of the standard values.
SBIA0447E
SBIA0448E
SMA967B
Standard
: 78 - 98 kPa (0.8 - 1.0 kg/cm
2 , 11 - 14 psi)
Limit
: 59 kPa (0.6 kg/cm
2 , 9 psi)
SLC755A

DI-28
UNIFIED METER AND A/C AMP
Revision: 2004 November 2004 FX35/FX45
UNIFIED METER AND A/C AMPPFP:27760
System DescriptionAKS005N8

For the unified meter and A/C amp., the signal required for controlling the combination meter are inte-
grated in the A/C auto amp.

Unified meter and A/C amp. controls each operation for A/C auto amp. For information regarding A/C con-
trol, refer to AT C - 3 0 , "
AIR CONDITIONER CONTROL" in ATC section.

Unified meter and A/C amp. inputs necessary information for combination meter from each unit by CAN
communication and so on.

And unified meter and A/C amp. outputs these signals using communication line (TX, RX) between unified
meter and A/C amp. and combination meter.

The signals required for the distance to empty (DTE) display are centralized in the unified meter and A/C
amp., converted into data, and sent to the display unit (without NAVI) display control unit (with NAVI) using
CAN communication.

Other input signals are also sent to the ECM, TCM, AWD control unit, BCM, display unit (without NAVI)
and display control unit (with NAVI) using CAN communication.

The unified meter and A/C amp. have a CONSULT-II function (self-diagnostic results, CAN diagnostic
support monitor, data monitor).
INPUT/OUTPUT SIGNALS
Between Unified Meter & A/C amp. and Combination Meter
Unit Input Output
Unified meter and A/C amp.

Seat belt buckle switch signal (Driver's side)

Parking brake signal

Illumination control nighttime required signal

Refuel status signal

Low-fuel warning lamp condition signal

Combination meter receive error signal

Delivery destination data signal

Combination meter specifications signal

Vehicle speed signal (8-pulse)

Engine speed signal

Engine coolant temperature signal

Fuel level sensor signal (resistance value)

Malfunction indicator lamp signal

ABS warning lamp signal

Low tire pressure warning lamp signal

Brake warning lamp signal

A/T CHECK warning lamp signal

ICC warning lamp signal

Oil pressure switch signal

Door switch signal

AWD warning lamp signal

VDC OFF indicator lamp signal

SLIP indicator lamp signal

ASCD CRUISE indicator lamp signal

ASCD SET indicator lamp signal

High beam request signal

Turn indicator signal

Snow mode switch signal

ICC system display signal

A/T position indicator signal

Manual mode indicator signal

Manual mode gear position signal

CAN communication condition signal of A/T

Position lights request signal

Buzzer output signal

ENGINE CONTROL SYSTEM
EC-31
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
MA
EC
Revision: 2004 November 2004 FX35/FX45
System ChartABS006K6
*1: This sensor is not used to control the engine system. This is used only for the on board diagnosis.
*2: This sensor is not used to control the engine system under normal conditions.
*3: This input signal is sent to the ECM through CAN communication line.
*4: This output signal is sent from the ECM through CAN communication line.Input (Sensor) ECM Function Output (Actuator)

Camshaft position sensor (PHASE)

Crankshaft position sensor (POS)

Mass air flow sensor

Engine coolant temperature sensor

Heated oxygen sensor 1

Throttle position sensor

Accelerator pedal position sensor

Park/neutral position (PNP) switch

Intake air temperature sensor

Power steering pressure sensor

Ignition switch

Battery voltage

Knock sensor

Refrigerant pressure sensor

Stop lamp switch

ICC steering switch

ICC brake switch

ASCD steering switch

ASCD brake switch

Fuel level sensor*1 *3

EVAP control system pressure sensor

Fuel tank temperature sensor*1

Heated oxygen sensor 2*2

TCM (Transmission control module)*3

ABS actuator and electric unit (control unit)*3

ICC unit*3

Air conditioner switch*3

Wheel sensor*3

Electrical load signal*3
Fuel injection & mixture ratio control Fuel injector
Electronic ignition system Power transistor
Fuel pump control Fuel pump relay
ICC vehicle speed control Electric throttle control actuator
ASCD vehicle speed control Electric throttle control actuator
On board diagnostic system
MIL (On the instrument panel)*
4
Heated oxygen sensor 1 heater control Heated oxygen sensor 1 heater
Heated oxygen sensor 2 heater control Heated oxygen sensor 2 heater
EVAP canister purge flow controlEVAP canister purge volume control
solenoid valve
Air conditioning cut control
Air conditioner relay*
4
Cooling fan control
Cooling fan relay*4
ON BOARD DIAGNOSIS for EVAP system EVAP canister vent control valve

EC-32
[VQ35DE]
ENGINE CONTROL SYSTEM
Revision: 2004 November 2004 FX35/FX45
Multiport Fuel Injection (MFI) SystemABS006K7
INPUT/OUTPUT SIGNAL CHART
*1: This sensor is not used to control the engine system under normal conditions.
*2: This signal is sent to the ECM through CAN communication line.
*3: ECM determines the start signal status by the signals of engine speed and battery voltage.
SYSTEM DESCRIPTION
The amount of fuel injected from the fuel injector is determined by the ECM. The ECM controls the length of
time the valve remains open (injection pulse duration). The amount of fuel injected is a program value in the
ECM memory. The program value is preset by engine operating conditions. These conditions are determined
by input signals (for engine speed and intake air) from both the crankshaft position sensor and the mass air
flow sensor.
VARIOUS FUEL INJECTION INCREASE/DECREASE COMPENSATION
In addition, the amount of fuel injected is compensated to improve engine performance under various operat-
ing conditions as listed below.


During warm-up

When starting the engine

During acceleration

Hot-engine operation

When selector lever is changed from N to D

High-load, high-speed operation


During deceleration

During high engine speed operation
Sensor Input Signal to ECM ECM function Actuator
Crankshaft position sensor (POS)
Engine speed*
3
Piston position
Fuel injection
& mixture ratio
controlFuel injector Camshaft position sensor (PHASE)
Mass air flow sensor Amount of intake air
Engine coolant temperature sensor Engine coolant temperature
Heated oxygen sensor 1 Density of oxygen in exhaust gas
Throttle position sensor Throttle position
Accelerator pedal position sensor Accelerator pedal position
Park/neutral position (PNP) switch Gear position
Knock sensor Engine knocking condition
Battery
Battery voltage*
3
Power steering pressure sensor Power steering operation
Heated oxygen sensor 2*
1Density of oxygen in exhaust gas
Air conditioner switch*
2Air conditioner operation
Wheel sensor*
2Vehicle speed