2004 INFINITI FX35 control

TROUBLE DIAGNOSIS
ATC-85
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Revision: 2004 November 2004 FX35/FX45
SYSTEM DESCRIPTION
Unified meter and A/C amp. controls compressor operation by ambient temperature, intake air temperature
and signal from ECM.
Low Temperature Protection Control
Unified meter and A/C amp. will turn the compressor ON or OFF as determined by a signal detected by ambi-
ent sensor and intake sensor.
When ambient temperature is higher than −2°C (28°F), the compres-
sor turns ON. The compressor turns OFF when ambient temperature
is lower than −5°C (23°F).
When intake air temperature is higher than 1°C (34°F), the compres-
sor turns ON. The compressor turns OFF when intake air tempera-
ture is lower than −5°C (23°F).
DIAGNOSTIC PROCEDURE FOR MAGNET CLUTCH
SYMPTOM: Magnet clutch does not engage when A/C switch is ON.
RHA094GB
SJIA0267E
RJIA2003E

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

TROUBLE DIAGNOSIS
ATC-99
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Revision: 2004 November 2004 FX35/FX45
2. CHECK ECV CONTROL SIGNAL
1. Turn ignition switch OFF.
2. Reconnect compressor (ECV) connector.
3. Perform self-diagnosis. Refer to AT C - 5 3 , "
Self-diagnosis Func-
tion" .
4. Set in self-diagnosis STEP-45. Refer to AT C - 5 4 , "
FUNCTION
CONFIRMATION PROCEDURE" .
5. Confirm the unified meter and A/C amp. harness connector M57
terminal 45 (PU/W) duty ratio using an oscilloscope.
OK or NG
OK >> Replace compressor.
NG >> GO TO 3.
3. CHECK CIRCUIT CONTINUITY BETWEEN ECV AND UNIFIED METER AND A/C AMP.
1. Turn ignition switch OFF.
2. Disconnect compressor (ECV) and unified meter and A/C amp.
connector.
3. Check continuity between compressor (ECV) harness connector
F6 terminal 3 (PU) and unified meter and A/C amp. harness
connector M57 terminal 45 (PU/W).
OK or NG
OK >> GO TO 4.
NG >> Repair harness or connector.
4. CHECK ECV
Check continuity between compressor (ECV) connector F6 terminals
2 and 3.
OK or NG
OK >> Replace unified meter and A/C amp.
NG >> Replace compressor.
RJIA2295E
RJIA1475E
3 – 45 : Continuity should exist.
RJIA2296E
2 – 3 : Continuity should exist.
RJIA2297E

CONTROLLER
ATC-115
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Revision: 2004 November 2004 FX35/FX45
CONTROLLERPFP:27500
Removal and Installation of A/C and AV SwitchAJS001BN
REMOVAL
Remove cluster lid C. Refer to IP-11, "Removal and Installation" .
INSTALLATION
Installation is basically the reverse order of removal.

ATC-126
HEATER & COOLING UNIT ASSEMBLY
Revision: 2004 November 2004 FX35/FX45
HEATER & COOLING UNIT ASSEMBLYPFP:27110
Removal and InstallationAJS0015J
REMOVAL
1. Use a refrigerant collecting equipment (for HFC-134a) to discharge refrigerant.
2. Drain coolant from cooling system. Refer to CO-11, "
Changing Engine Coolant" (VQ35DE) or CO-36,
"Changing Engine Coolant" (VK45DE).
3. Remove cowl top cover. Refer to EI-24, "
COWL TOP" .
4. Remove high-pressure pipe 2 mounting clip.
5. Remove low-pressure flexible hose bracket mounting bolts.
6. Disconnect evaporator-side one touch joint.
a. Set a disconnector (High-pressure side: 92530-89908, Low-
pressure side: 92530-89916) 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:
Seal connection opening of piping with a cap or vinyl tape
to avoid exposure to atmosphere.
7. Remove electronic control throttle assembly (VQ35DE). Refer to
EM-19, "
INTAKE MANIFOLD COLLECTOR" .
8. Disconnect two heater hoses from heater core.
9. Remove instrument panel assembly. Refer to IP-11, "
Removal
and Installation" .
10. Remove blower unit. Refer to ATC-121, "
BLOWER UNIT" .
11. Remove instrument stays (driver side and passenger side).
RJIA2037E
RJIA2041E
RJIA2077E
RJIA2042E

REFRIGERANT LINES
ATC-159
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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.

AV-2Revision: 2004 November 2004 FX35/FX45Antenna Amp. Inspection ....................................... 51
Location of Antenna ................................................ 52
Window Antenna Repair ......................................... 52
CHECK ELEMENT .............................................. 52
Removal and Installation of Roof Antenna ............. 54
REMOVAL ........................................................... 54
INSTALLATION .................................................... 54
INTEGRATED DISPLAY SYSTEM ............................ 55
System Description ................................................. 55
A/C AND AV SWITCH SYSTEM .......................... 55
PRECAUTION OF LCD MONITOR ..................... 55
POWER SUPPLY AND GROUND ....................... 55
DRIVE COMPUTER ............................................ 56
E/M SWITCH ....................................................... 57
SETTING SCREEN ............................................. 58
WARNING INDICATIONS ................................... 59
AV COMMUNICATION LINE ............................... 59
CAN Communication System Description .............. 60
CAN Communication Unit ....................................... 61
Component Parts and Harness Connector Location ... 61
Schematic ............................................................... 62
Wiring Diagram — INF/D — ................................... 63
Schematic ............................................................... 68
Wiring Diagram — COMM — ................................. 69
Terminals and Reference Value for Display Unit .... 72
Terminals and Reference Value for A/C and AV
Switch ..................................................................... 73
On Board Self-Diagnosis Function ......................... 74
DESCRIPTION .................................................... 74
DIAGNOSIS ITEM ............................................... 74
Self-Diagnosis Mode .............................................. 74
OPERATION PROCEDURES ............................. 74
NETWORK CHECK ............................................. 75
PARTS CHECK ................................................... 76
HVAC DETAIL SCREEN ...................................... 76
VERSION CHECK ............................................... 76
CAN DIAG MNTR (CAN DIAG MONITOR) ......... 76
A/C and AV Switch Self-Diagnosis Function ........... 77
STARTING THE SELF-DIAGNOSIS MODE ........ 77
DIAGNOSIS FUNCTION ..................................... 77
EXITING THE SELF-DIAGNOSIS MODE ........... 77
Trouble Diagnosis Chart by Symptom .................... 78
Power Supply and Ground Circuit Check for Display
Unit ......................................................................... 79
Power Supply and Ground Circuit Check for A/C and
AV Switch ................................................................ 80
Vehicle Speed Signal Inspection ............................ 80
Illumination Signal Inspection ................................. 81
Ignition Signal Inspection ........................................ 82
Audio Communication Line Inspection ................... 82
A/C and AV Switch Does Not Operate .................... 84
CAN Communication Line Inspection ..................... 85
Audio Steering Wheel Switch Inspection ................ 85
Removal and Installation of Display ........................ 87
REMOVAL ........................................................... 87
INSTALLATION .................................................... 87
Removal and Installation of A/C and AV Switch ..... 87
NAVIGATION SYSTEM ............................................. 88
System Description ................................................. 88TRAVEL DISTANCE ............................................ 88
TRAVEL DIRECTION .......................................... 88
MAP-MATCHING ................................................. 88
GPS (GLOBAL POSITIONING SYSTEM) .......... 89
COMPONENT DESCRIPTION ............................ 90
BIRDVIEW™ ........................................................ 90
MAP DISPLAY ..................................................... 91
FUNCTION OF CENTER SWITCH ..................... 92
“VIEW” MODE ...................................................... 98
“HEADING” MODE .............................................. 99
“NEARBY DISPLAY ICONS” MODE .................... 99
“SAVE CURRENT LOCATION” MODE ................ 99
“ADJUST CURRENT LOCATION” MODE ........... 99
“AUTO RE-ROUTE” MODE ...............................100
“AVOID AREA SETTING” MODE ......................100
“CLEAR MEMORY” MODE ................................100
“EDIT ADDRESS BOOK” MODE .......................101
“GPS INFORMATION” MODE ...........................101
“QUICK STOP CUSTOMER SETTING” MODE .101
“SET AVERAGE SPEED” MODE ......................101
“TRACKING” MODE ..........................................102
GUIDANCE VOLUME ........................................102
DISPLAY WITH PUSHED “TRIP” BUTTON .......102
TRIP 1 OR TRIP 2 .............................................103
FUEL ECONOMY ..............................................103
MAINTENANCE .................................................103
ENGINE OIL OR TIRE ROTATION ....................103
TIRE PRESSURE ..............................................104
WARNING INDICATIONS ..................................104
CAN Communication System Description ............105
CAN Communication Unit .....................................105
Component Parts Location and Harness Connector
Location ................................................................105
Schematic—NAVI— ..............................................106
Wiring Diagram —NAVI— .....................................107
Schematic — COMM — ........................................115
Wiring Diagram — COMM — ................................116
Terminals and Reference Value for NAVI Control
Unit ........................................................................121
Terminals and Reference Value for Display Control
Unit ........................................................................123
Terminals and Reference Value for Display ..........127
Terminals and Reference Value for A/C and AV
Switch ...................................................................129
On Board Self-Diagnosis Function ........................130
DESCRIPTION ..................................................130
DIAGNOSIS ITEM .............................................130
Self-Diagnosis Mode (DCU) ..................................131
OPERATION PROCEDURE ..............................131
SELF–DIAGNOSIS RESULT .............................133
Self-Diagnosis Mode (NAVI) .................................133
OPERATION PROCEDURE ..............................133
SELF–DIAGNOSIS RESULT .............................135
Confirmation/Adjustment Mode .............................136
OPERATION PROCEDURE ..............................136
DISPLAY DIAGNOSIS .......................................136
VEHICLE SIGNALS ...........................................137
AUTO CLIMATE CONTROL ..............................137
NAVIGATION .....................................................138

AV-3
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AV
Revision: 2004 November 2004 FX35/FX45DISPLAY DIAGNOSIS ...................................... 138
VEHICLE SIGNALS .......................................... 139
HISTORY OF ERRORS .................................... 139
DIAGNOSIS BY HISTORY OF ERRORS ......... 140
NAVIGATION .................................................... 141
Can Diag Support Monitor .................................... 143
OPERATION PROCEDURE ............................. 143
A/C and AV Switch Self-Diagnosis Function ........ 144
DESCRIPTION .................................................. 144
Power Supply and Ground Circuit Check for NAVI
Control Unit .......................................................... 145
Power Supply and Ground Circuit Check for Display
Control Unit .......................................................... 146
Power Supply and Ground Circuit Check for Display . 147
Power Supply and Ground Circuit Check for A/C and
AV Switch ............................................................. 149
Vehicle Speed Signal Check for NAVI Control Unit . 149
Vehicle Speed Signal Check for Display Control Unit . 150
Illumination Signal Check for NAVI Control Unit ... 151
Illumination Signal Check for Display Control Unit . 152
Ignition Signal Check for NAVI Control Unit ......... 152
Ignition Signal Check for Display Control Unit ..... 152
Reverse Signal Check for NAVI Control Unit ....... 152
Reverse Signal Check for Display Control Unit .... 153
When Malfunctioning Connection Between Display
Control Unit and NAVI Control Unit ...................... 153
When Malfunctioning Connection Between Display
Control Unit and Audio Unit .................................. 154
When Malfunctioning Connection Between Display
Control Unit and Display ...................................... 156
CAN Communication Line Check ......................... 158
If NAVI Control Unit Detects That DVD-ROM Map
is not Inserted ....................................................... 158
If NAVI Control Unit Detects that Inserted DVD-ROM
Map Malfunctioning or if it is Impossible to Load Data
from DVD-ROM Map ............................................ 158
If Connection Between NAVI Control Unit and GPS
Antenna is Malfunctioning .................................... 159
Color of RGB Image is Not Proper (NAVI Screen
Looks Bluish) ........................................................ 159
Color of RGB Image is Not Proper (NAVI Screen
Looks Reddish) .................................................... 160
Color of RGB Image is Not Proper (NAVI Screen
Looks Yellowish) ................................................... 161
Color of RGB Image is Not Proper (All screens Looks
Bluish) .................................................................. 162
Color of RGB Image is Not Proper (All Screens
Looks Reddish) .................................................... 163
Color of RGB Image is Not Proper (All Screens
Looks Yellowish) ................................................... 164
NAVI Screen is Rolling ......................................... 166
Guide Sound is Not Heard ................................... 167
Screen is Not Shown ............................................ 167
Operating Screen for Audio and A/C is Not Dis-
played When Showing NAVI Screen .................... 168
TRIP, FUEL ECON and MAINTENANCE Screens
are Not Shown ..................................................... 169
Average Fuel Economy Displayed is Not Shown
(“***” is Shown) ..................................................... 169Driving Distance or Average Speed is Not Shown
(“***” is Shown) .....................................................170
WARNING DOOR OPEN Screen is Not Shown ...170
TIRE PRESSURE Screen is not Shown ...............170
Unable to Operate All of A/C and AV switch (Unable
to start Self-Diagnosis) .........................................171
Position of Current-Location Mark is Not Correct . 172
Driving Test ...........................................................172
Example of Symptoms Judged Not Malfunction ...173
BASIC OPERATION ..........................................173
VEHICLE MARK ................................................173
DESTINATION, PASSING POINTS, AND MENU
ITEMS CANNOT BE SELECTED/SET ..............174
VOICE GUIDE ...................................................175
ROUTE SEARCH ..............................................175
EXAMPLES OF CURRENT-LOCATION MARK
DISPLACEMENT ..............................................176
CURRENT LOCATION MARK SHOWS A POSI-
TION WHICH IS COMPLETELY WRONG ........179
CURRENT-LOCATION MARK JUMPS .............179
CURRENT LOCATION MARK IS IN A RIVER OR
SEA ...................................................................180
WHEN DRIVING ON SAME ROAD, SOME-
TIMES CURRENT-LOCATION MARK IS IN
RIGHT PLACE AND SOMETIMES IT IS WRONG
PLACE ...............................................................180
LOCATION CORRECTION BY MAP-MATCH-
ING IS SLOW ....................................................180
ALTHOUGH GPS RECEIVING DISPLAY IS
GREEN, VEHICLE MARK DOES NOT RETURN
TO CORRECT LOCATION ................................180
NAME OF CURRENT PLACE IS NOT DIS-
PLAYED .............................................................180
CONTENTS OF DISPLAY DIFFER FOR BIRD-
VIEW™ AND THE (FLAT) MAP SCREEN ........180
Program Loading of NAVI Control Unit .................181
Removal and Installation of NAVI control Unit ......182
REMOVAL .........................................................182
INSTALLATION .................................................182
Removal and Installation of GPS Antenna ...........182
REMOVAL .........................................................182
INSTALLATION .................................................182
Removal and Installation of A/C and AV Switch ...183
Removal and Installation of Display Unit ..............183
Removal and Installation of Display Control Unit . 183
REMOVAL .........................................................183
INSTALLATION .................................................183
INFINITI MOBILE ENTERTAINMENT SYSTEM .....184
System Description ...............................................184
Component Parts and Harness Connector Location .185
Wiring Diagram – MES – ......................................186
Terminals and Reference Value for DVD Player ...188
Terminals and Reference Value for DVD Display . 189
DVD Player Is Not Work .......................................191
Screen Is Not Shown (While Sounds Come Out of
an Audio Speaker, Did not do of a Head Phone) ..193
Screen is not Shown (Sounds Come Out of Both
an Audio Speaker and a Head Phone) .................194
Head Phone Does Not Sound ..............................195