bcm INFINITI FX35 2005 Service Manual

DESCRIPTION ACS-7
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Components DescriptionAKS00C8D
CAN CommunicationAKS00C8E
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tric control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only.
CAN COMMUNICATION UNIT
Refer to LAN-30, "CAN Communication Unit" .
Component Vehicle-to-
vehicle
distance
control mode Conventional
(fixed speed) cruise
control mode Brake assist
(with pre-
view func- tion) Description
ICC unit ××× Operates electric throttle control actuator and brake
booster based on that sensor signals and CAN commu-
nication data, then controls vehicle distance.
ICC sensor ×× Irradiates laser beam, and receives reflected laser
beam to measure distance from preceding vehicle.
ECM ××× Transmits throttle position signal and ICC steering
switch signal to ICC unit through CAN communication.
ABS actuator and electric
unit (control unit) ×××
Transmits wheel speed sensor signal to ICC unit
through CAN communication.
Brake pressure sensor ×× Detects fluid pressure in master cylinder.
Brake booster ×× Adjusts brake fluid pressure, based on command from
ICC unit.
BCM × Transmit front wiper request signal to ICC unit through
CAN communication.
TCM ×× Transmits gear position signal and output shaft revolu-
tion signal to ICC unit through CAN communication.
Unified meter and A/C amp. ××× Receives ICC system display signal, ICC warning lamp
signal and buzzer output signal from ICC unit through
CAN communication.
ICC brake switch, stop
lamp switch ××× Transmit operating signal to ICC unit when touching
brake pedal. ICC unit cancels cruise system at driver's
brake operation.
Parking brake switch ×× The cruise system is cancelled when applied.

ACS-32
[ICC]
TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
Revision: 2005 July 2005 FX
SELF-DIAGNOSTIC RESULTS
For details, refer to ACS-41, "Diagnostic Trouble Code (DTC) Chart" .
DATA MONITOR
Operation Procedure
1. Touch “DATA MONITOR” on “SELECT DIAG MODE” screen. Refer to ACS-30, "
CONSULT-II BASIC OPERATION" .
2. Touch any of “ECU INPUT SIGNALS”, “MAIN SIGNALS” and “SELECTION FROM MENU” on selection screen.
3. Touch “START”.
4. Display the data monitor.
5. If necessary, touch “COPY” in turn, and print data.
Monitored Item
× : Applicable
PKIB0112E
Monitored Item
[unit] ECU INPUT
SIGNALS MAIN
SIGNALS SELEC-
TION FROM MENU Description
VHCL SPEED SE
[km/h] or [mph] ××× Indicates vehicle speed calculated from ICC unit through CAN
communication [ABS actuator and electric unit (control unit)
transmits wheel speed sensor signal through CAN communica-
tion].
SET VHCL SPD
[km/h] or [mph] ×× Indicates set vehicle speed memorized in ICC unit.
THRTL OPENING
[%] ××× Indicates throttle angle read from ICC unit through CAN commu-
nication (ECM transmits throttle angle through CAN communi-
cation).
ENGINE RPM
[rpm] ×× Indicates engine speed read from ICC unit through CAN com-
munication (ECM transmits engine speed through CAN commu-
nication).
DISTANCE ADJ
[SHOR/MID/LONG] ×××
Indicates set distance memorized in ICC unit.
WIPER SW
[OFF/LOW/HIGH] ×× Indicates wiper [OFF/LOW/HIGH] status (BCM transmits front
wiper request signal through CAN communication).
MAIN SW
[ON/OFF] ××× Indicates [ON/OFF] status as judged from ICC steering switch
signal (ECM transmits ICC steering switch signal through CAN
communication).
SET/COAST SW
[ON/OFF] ××× Indicates [ON/OFF] status as judged from ICC steering switch
signal (ECM transmits ICC steering switch signal through CAN
communication).
CANCEL SW
[ON/OFF] ××× Indicates [ON/OFF] status as judged from ICC steering switch
signal (ECM transmits ICC steering switch signal through CAN
communication).
RESUME/ACC SW
[ON/OFF] ××× Indicates [ON/OFF] status as judged from ICC steering switch
signal (ECM transmits ICC steering switch signal through CAN
communication).
CRUISE OPE
[ON/OFF] ×× Indicates whether controlling or not (ON means “controlling”).
BRAKE SW
[ON/OFF] ××× Indicates [ON/OFF] status as judged from ICC brake switch sig-
nal.
STOP LAMP SW
[ON/OFF] ×××
Indicates [ON/OFF] status as judged from stop lamp switch sig-
nal.

ATC-2Revision: 2005 July 2005 FX
MODE SWITCH ................................................
... 35
FAN SWITCH ................................................... ... 35
DUAL SWITCH (WITH LEFT AND RIGHT VEN-
TILATION TEMPERATURE SEPARATELY
CONTROL SYSTEM) ....................................... ... 35
Fail-safe Function ................................................ ... 36
Discharge Air Flow .............................................. ... 37
System Description .............................................. ... 38
SWITCHES AND THEIR CONTROL FUNCTION ... 38
CAN Communication System Description ........... ... 39
TROUBLE DIAGNOSIS ......................................... ... 40
CONSULT-II Function (BCM) ............................... ... 40
CONSULT-II BASIC OPERATION .................... ... 40
DATA MONITOR ............................................... ... 41
How to Perform Trouble Diagnosis for Quick and
Accurate Repair ................................................... ... 42
WORK FLOW ................................................... ... 42
SYMPTOM TABLE ........................................... ... 42
Component Parts and Harness Connector Location ... 43
ENGINE COMPARTMENT ............................... ... 43
PASSENGER COMPARTMENT ....................... ... 44
Schematic ............................................................ ... 45
Wiring Diagram —A/C— ...................................... ... 46
Auto Amp. Terminals and Reference Value ......... ... 51
PIN CONNECTOR TERMINAL LAYOUT ......... ... 51
TERMINALS AND REFERENCE VALUE FOR
UNIFIED METER AND A/C AMP. ..................... ... 51
Self-diagnosis Function ....................................... ... 53
DESCRIPTION ................................................. ... 53
FUNCTION CONFIRMATION PROCEDURE ... ... 54
AUXILIARY MECHANISM: TEMPERATURE
SETTING TRIMMER ........................................ ... 59
AUXILIARY MECHANISM: FOOT POSITION
SETTING TRIMMER ........................................ ... 60
AUXILIARY MECHANISM: INLET PORT MEM-
ORY FUNCTION .............................................. ... 60
Operational Check ............................................... ... 61
CHECKING MEMORY FUNCTION .................. ... 61
CHECKING BLOWER ...................................... ... 61
CHECKING DISCHARGE AIR ......................... ... 61
CHECKING INTAKE AIR .................................. ... 62
CHECKING TEMPERATURE DECREASE ...... ... 62
CHECKING TEMPERATURE INCREASE ....... ... 62
CHECK A/C SWITCH ....................................... ... 62
CHECKING AUTO MODE ................................ ... 63
Power Supply and Ground Circuit for Auto Amp. ... 63 INSPECTION FLOW ........................................ ... 63
COMPONENT DESCRIPTION ......................... ... 64
DIAGNOSIS PROCEDURE FOR A/C SYSTEM ... 64
LAN System Circuit ............................................. ... 66
DIAGNOSIS PROCEDURE FOR LAN CIRCUIT ... 66
Mode Door Motor Circuit ..................................... ... 70
INSPECTION FLOW ........................................ ... 70
SYSTEM DESCRIPTION ................................. ... 71
COMPONENT DESCRIPTION ......................... ... 72
DIAGNOSIS PROCEDURE FOR MODE DOOR
MOTOR ............................................................ ... 72
Air Mix Door Motor Circuit ................................... ... 73
INSPECTION FLOW ........................................ ... 73 SYSTEM DESCRIPTION ..................................
... 74
COMPONENT DESCRIPTION ......................... ... 75
DIAGNOSIS PROCEDURE FOR AIR MIX DOOR
MOTOR ............................................................. ... 75
Air Mix Door Motor PBR Circuit ........................... ... 75
DIAGNOSIS PROCEDURE FOR AIR MIX DOOR
MOTOR PBR .................................................... ... 75
Intake Door Motor Circuit ..................................... ... 76
INSPECTION FLOW ......................................... ... 76
SYSTEM DESCRIPTION .................................. ... 77
COMPONENT DESCRIPTION ......................... ... 78
DIAGNOSIS PROCEDURE FOR INTAKE DOOR
MOTOR ............................................................. ... 78
Blower Motor Circuit ............................................. ... 79
INSPECTION FLOW ......................................... ... 79
SYSTEM DESCRIPTION .................................. ... 80
COMPONENT DESCRIPTION ......................... ... 81
DIAGNOSIS PROCEDURE FOR BLOWER
MOTOR ............................................................. ... 81
COMPONENT INSPECTION ............................ ... 83
Magnet Clutch Circuit ........................................... ... 84
INSPECTION FLOW ......................................... ... 84
SYSTEM DESCRIPTION .................................. ... 85
DIAGNOSIS PROCEDURE FOR MAGNET
CLUTCH ........................................................... ... 85
COMPONENT INSPECTION ............................ ... 90
Insufficient Cooling ............................................... ... 91
INSPECTION FLOW ......................................... ... 91
PERFORMANCE TEST DIAGNOSIS ............... ... 93
PERFORMANCE CHART ................................. ... 95
TROUBLE DIAGNOSIS FOR UNUSUAL PRES-
SURE ................................................................ ... 96
DIAGNOSIS PROCEDURE FOR INSUFFI-
CIENT COOLING .............................................. ... 98
Insufficient Heating .............................................. .100
INSPECTION FLOW ......................................... .100
Noise .................................................................... .101
INSPECTION FLOW ......................................... .101
Self-diagnosis ...................................................... .102
INSPECTION FLOW ......................................... .102
Memory Function ................................................. .103
INSPECTION FLOW ......................................... .103
Ambient Sensor Circuit ........................................ .104
COMPONENT DESCRIPTION ......................... .104
AMBIENT TEMPERATURE INPUT PROCESS .104
DIAGNOSIS PROCEDURE FOR AMBIENT
SENSOR ........................................................... .104
COMPONENT INSPECTION ............................ .106
In-vehicle Sensor Circuit ...................................... .107
COMPONENT DESCRIPTION ......................... .107
DIAGNOSIS PROCEDURE FOR IN-VEHICLE
SENSOR ........................................................... .108
COMPONENT INSPECTION ............................ .109
Sunload Sensor Circuit ........................................ .110
COMPONENT DESCRIPTION ......................... .110
SUNLOAD INPUT PROCESS .......................... .110
DIAGNOSIS PROCEDURE FOR SUNLOAD
SENSOR ........................................................... .110

AIR CONDITIONER CONTROL ATC-33
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MAGNET CLUTCH CONTROL
When A/C switch or DEF switch is pressed, unified meter and A/C amp. inputs compressor ON signal to BCM.
BCM sends compressor ON signal to ECM, via CAN communication line.
ECM judges whether compressor can be turned ON, based on each sensor status (refrigerant-pressure sen-
sor signal, throttle angle, etc.). If it judges compressor can be turned ON, it sends compressor ON signal to
IPDM E/R, via CAN communication line.
Upon receipt of compressor ON signal from ECM, IPDM E/R turns air conditioner relay ON to operate com-
pressor.
When sending compressor ON signal to IPDM E/R via CAN communication line, ECM simultaneously sends
compressor feedback signal to unified meter and A/C amp. via CAN communication line.
Unified meter and A/C amp., then, uses input compressor feedback signal to control air inlet.
SELF-DIAGNOSIS SYSTEM
The self-diagnosis system is built into the unified meter and A/C amp. to quickly locate the cause of symp-
toms.
RJIA1957E

ATC-40
TROUBLE DIAGNOSIS
Revision: 2005 July 2005 FX
TROUBLE DIAGNOSISPFP:00004
CONSULT-II Function (BCM)AJS0014J
CONSULT-II can display each diagnosis item using the diagnosis test modes shown following.
CONSULT-II BASIC OPERATION
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be
detected in self-diagnosis depending on control unit which carry out CAN communication.
1. With the ignition switch OFF, connect CONSULT-II and “CON- SULT-II CONVERTER” to the data link connector, and then turn
the ignition switch ON.
2. Touch “START (NISSAN BASED VHCL)”.
3. Touch “BCM” on “SELECT SYSTEM” screen. If “BCM” is not indicated, refer to GI-39, "
CONSULT-II Data Link Connector
(DLC) Circuit" .
System part Check item, diagnosis mode Description
BCM Data monitor Displays BCM input data in real time.
PBIB1503E
BCIA0029E
BCIA0030E

TROUBLE DIAGNOSIS ATC-87
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5. CHECK BCM INPUT (COMPRESSOR ON) SIGNAL
Check compressor ON/OFF signal. Refer to AT C - 4 0 , "
CONSULT-II
Function (BCM)" .
OK or NG
OK >> GO TO 8.
NG >> GO TO 6.
6. CHECK CIRCUIT CONTINUITY BETWEEN BCM AND UNIFIED METER AND A/C AMP.
1. Turn ignition switch OFF.
2. Disconnect BCM connector and unified meter and A/C amp. connector.
3. Check continuity between BCM harness connector M3 terminal 27 (R/Y) and unified meter and A/C amp. harness connector
M57 terminal 42 (R/Y).
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 (R/Y) and ground.
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 when A/C switch is OFF: Replace BCM. A/C SW ON : AIR COND SW ON
A/C SW OFF : AIR COND SW OFF
R J I A 1111 E
27 – 42 : Continuity should exist.
RJIA2006E
Te r m i n a l s
Condition Voltage
(+)
( − )
Unified meter
and A/C amp.
connector Terminal
No.
(wire color)
M57 42 (R/Y) Ground A/C switch: ON
(Blower motor operates.) Approx. 0 V
OFF switch: ON
(A/C system: OFF) Approx. 5 V
RJIA2007E

ATC-88
TROUBLE DIAGNOSIS
Revision: 2005 July 2005 FX
8. CHECK REFRIGERANT PRESSURE SENSOR
WITH CONSULT-II
1. Start the engine.
2. Check voltage of refrigerant pressure sensor. Refer to EC-147, "
CONSULT-II Reference Value in Data
Monitor" (VQ35DE) or EC-838, "CONSULT-II Reference Value in Data Monitor" (VK45DE).
WITHOUT CONSULT-II
1. Start the engine.
2. Check voltage between ECM harness connector F101 terminal 70 (L/R) and ground.
OK or NG
OK >>
WITH CONSULT-II
GO TO 9.

WITHOUT CONSULT-II
GO TO 10.
NG >> Refer to EC-674, "
REFRIGERANT PRESSURE SENSOR" (VQ35DE) or EC-1364, "REFRIGER-
ANT PRESSURE SENSOR" (VK45DE).
9. CHECK BCM INPUT (FAN ON) SIGNAL
Check FAN ON/OFF signal. Refer to AT C - 4 0 , "
CONSULT-II Function
(BCM)" .
OK or NG
OK >> GO TO 12.
NG >> GO TO 10.
10. CHECK CIRCUIT CONTINUITY BETWEEN BCM AND UNIFIED METER AND A/C AMP.
1. Turn ignition switch OFF.
2. Disconnect BCM connector and unified meter and A/C amp. connector.
3. Check continuity between BCM harness connector M3 terminal 28 (BR/Y) and unified meter and A/C amp. harness connector
M57 terminal 57 (BR/Y).
OK or NG
OK >> GO TO 11.
NG >> Repair harness or connector.
Te r m i n a l s
Condition Voltage
(+)
( − )
ECM
connector Terminal No.
(wire color)
F101 70 (L/R) Ground A/C switch: ON
(Blower motor operates.) Approx. 1 - 4 V
PBIB1188E
FAN SW ON : FAN ON SIG ON
FAN SW OFF : FAN ON SIG OFF
R J I A 1111 E
28 – 57 : Continuity should exist.
RJIA2009E

TROUBLE DIAGNOSIS ATC-89
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11 . CHECK VOLTAGE FOR UNIFIED METER AND A/C AMP. (FAN 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 57 (BR/Y) and ground.
OK or NG
OK >> GO TO 12.
NG-1 >> If the voltage is approx. 5 V when blower motor is ON: Replace unified meter and A/C amp.
NG-2 >> If the voltage is approx. 0 V when blower motor is OFF: Replace BCM. Refer to BCS-16,
"Removal and Installation of BCM" .
12. CHECK CAN COMMUNICATION
Check CAN communication. Refer to BCS-15, "
CAN Communication Inspection Using CONSULT-II (Self-
Diagnosis)" .

BCM – ECM

ECM – IPDM E/R

ECM – Unified meter and A/C amp.
OK or NG
OK >> INSPECTION END
NG >> Repair or replace malfunctioning part(s).
Te r m i n a l s
Condition Voltage
(+)
(-)
Unified meter
and A/C amp. connector Terminal No.
(wire color)
M57 57 (BR/Y) Ground A/C switch: ON
(Blower motor operates.) Approx. 0 V
OFF switch: ON
(A/C system: OFF) Approx. 5 V
RJIA2010E

INTEGRATED DISPLAY SYSTEM AV-59
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MAINT Switch (Maintenance Switch)

When “MAINT” switch is pressed, display vehicle information screen. As vehicle information, it indicates
engine oil, tire rotation, tire pressure.

Pressing “MAINT” switch once cycles display from engine oil →tire rotation →tire pressure →display
OFF →engine oil.
Engine Oil and Tire Rotation

Operating the joystick left/right, replace distance can be set.

When journey distance is the same as replace distance, alert is
displayed. (SERVICE ALERT setting is ON.)

Selected replace distance is 0 - 7,500 miles (0 - 12,000 km) in
increments of 500 mile (800 km).

Press and hold “TRIP RESET or MAINT” switch for 1.5 seconds
or longer, reset present journey distance.

During driving, cannot change settings.
Tire Pressure

Tire pressure signal is received from BCM through CAN commu-
nication line.

Tire pressure is displayed.

When FLAT TIRE signal is received from BCM, “FLAT TIRE” is
displayed.
E/M SWITCH
When “E/M” (English/Metric) switch is pressed, change the unit as followings.
SKIA5918E
SKIA5919E
Unit US Mile,
°F, M P G
Metric km, °C, l/100km

AV-60
INTEGRATED DISPLAY SYSTEM
Revision: 2005 July 2005 FX
SETTING SCREEN

Setting of electric status can be changed by A/C and AV switch. The signal is sent to BCM through display
unit to change vehicle electric system setting.

Display unit is communicating with driver seat control unit.

Pressing “SETTING” switch once cycles display from DISPLAY →LANGUAGE →BEEP SET →SERVICE
ALERT →PERSONALIZED SETTINGS MENU →DISPLAY OFF →DISPLAY.

Using the joystick, setting of each item will become possible.
Adjustable Vehicle Status
NOTE:
Setting in factory shipment is ON. Setting items
Setting
variations Initial
setting Operation
DISPLAY ON/OFF ON It switches displayed/Non-displayed of the screen.
LANGUAGE ENGLISH/
FRANCAIS – It switches displayed language.
BEEP SET ON/OFF ON It selects beep sound ON/OFF during switch operation. How-
ever, even if beep is set OFF, beep for NO OPERATION and
for screen interception are not reset.
SERVICE ALERT ON/OFF OFF It switches displayed/Non-displayed of alert indication.

When the setting is ON, if engine oil or tire rotation will be
replace distance, alert is displayed.

When the setting is OFF, alert is not displayed.
PERSONALIZED
SETTING MENU SLIDE BACK DR
SEAT ON EXIT ON/OFF
ON
NOTEThe driver’s seat automatically moves back and returns to the
original position for exceptional ease of exit and entry. (Models
with automatic drive positioner.)
LIFT STEERING
WHEEL ON EXIT ON/OFF
ON
NOTEThe steering column automatically tilts up and returns to the
original position for exceptional ease of entry and exit. (Models
with automatic drive positioner.)
REMOTE UNLOCK
DOOR LOGIC DR-1ST/ALL DR-1ST This key can switch the unlock doors of the 1st unlocking oper-
ation as follows:

Only the driver side door ⇔All the doors
HORN CHIRP
WITH REMOTE ON/OFF ON This key changes the horn chirp mode occurring when pressing
the LOCK button on the keyfob.
LAMPS FLASH
WITH REMOTE ALL/LOCK/
UNLOCK/OFF ALLThis key changes the hazard indicator flash mode occurring
when pressing the LOCK or UNLOCK button on the keyfob.
AUTO RE-LOCK
TIME 5m/1m/OFF 1m The length of auto door re-lock time can be set. Select the
“Auto Re-Lock timer” key, then move the joystick to adjust the
time.
AUTO HEADLAMP
SENSITIVITY LEVEL 1/2/3/4 LEVEL 2 Automatic light illumination can be set as desired. Select the
“Auto Headlamp Sensitivity” key, then move the joystick to the
left (lower) or right (higher).
AUTO HEADLAMP
OFF DELAY OFF/30/45/60/
90/120/150/ 180 SEC 45 SEC This key can control how long it takes the automatic turn off
timer to extinguish the headlamps in “AUTO” position. Select
the “Auto Headlamp Off Delay” key, then move the joystick to
the left or right to adjust the timer.
SPEED SENSING
WIPER INTERVAL ON/OFF ON This key turns on and off the driving speed dependent intermit-
tent wiper function.
CONFIRM RESET
SETTINGS YES/NO NO When this key is selected and turned on using the “ENTER”
button, all settings mode by PERSONALIZED SETTINGS will
return to the initial conditions.