2006 INFINITI FX35 Service Manual

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Page 4313 of 4462

INFINITI FX35 2006 Service Manual AWD SYSTEM TF-11
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Revision: 2006 December 2006 FX35/FX45
ELECTRIC CONTROLLED COUPLING
Operation Principle
1. AWD control unit supplies command current to electric

Page 4314 of 4462

INFINITI FX35 2006 Service Manual TF-12
AWD SYSTEM
Revision: 2006 December 2006 FX35/FX45
AWD WARNING LAMP
Turns ON when there is a malfunction in AWD system. It indicates that fail-safe mode is engaged and vehicle
change to rear-whe

Page 4315 of 4462

INFINITI FX35 2006 Service Manual AWD SYSTEM TF-13
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Revision: 2006 December 2006 FX35/FX45
COMPONENTS FUNCTION DESCRIPTION
CAN CommunicationNDS0009X
SYSTEM DESCRIPTION
CAN (Controller Area Network

AWD SYSTEM TF-13
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Revision: 2006 December 2006 FX35/FX45
COMPONENTS FUNCTION DESCRIPTION
CAN CommunicationNDS0009X
SYSTEM DESCRIPTION
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-
tronic 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.
For details, refer to LAN-32, "
CAN Communication Unit" .
Component parts Function
AWD control unit
Controls driving force distribution by signals from each sensor and switch from rear wheel driving
mode (0:100) to AWD mode (50:50).
2WD mode is available by fail-safe function if malfunction is detected in AWD system.
Wheel sensors Detects wheel speed.
AWD solenoid Controls electric controlled coupling by command current from AWD control unit.
Electric controlled coupling Transmits driving force to front final drive.
AWD warning lamp
Illuminates if malfunction is detected in electrical system of AWD system.
There is 1 blink in 2 seconds if rotation difference of front wheels and rear wheels is large.
There are 2 blinks in 1 second if load is still applied to driving parts.
ABS actuator and electric unit
(control unit) Transmits the following signals via CAN communication to AWD control unit.
Vehicle speed signal
Stop lamp switch signal (brake signal)
ECM Transmits the following signals via CAN communication to AWD control unit.
Accelerator pedal position signal
Engine speed signal
Unified meter and A/C amp. Transmits conditions of parking brake switch via CAN communication to AWD control unit.

Page 4316 of 4462

INFINITI FX35 2006 Service Manual TF-14
TROUBLE DIAGNOSIS
Revision: 2006 December 2006 FX35/FX45
TROUBLE DIAGNOSISPFP:00004
Fail-Safe FunctionNDS0009Y
If any malfunction occurs in AWD electrical system, and control unit detects the m

Page 4317 of 4462

INFINITI FX35 2006 Service Manual TROUBLE DIAGNOSIS TF-15
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Revision: 2006 December 2006 FX35/FX45
Location of Electrical PartsNDS000A0
SDIA2272E

Page 4318 of 4462

INFINITI FX35 2006 Service Manual TF-16
TROUBLE DIAGNOSIS
Revision: 2006 December 2006 FX35/FX45
Circuit DiagramNDS000A1
TDWM0055E

Page 4319 of 4462

INFINITI FX35 2006 Service Manual TROUBLE DIAGNOSIS TF-17
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Revision: 2006 December 2006 FX35/FX45
Wiring Diagram — AWD —NDS000A2
TDWM0056E

Page 4320 of 4462

INFINITI FX35 2006 Service Manual TF-18
TROUBLE DIAGNOSIS
Revision: 2006 December 2006 FX35/FX45
TDWM0057E

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