ESP INFINITI FX35 2006 Service Manual

TF-10
AWD SYSTEM
Revision: 2006 December 2006 FX35/FX45
AWD SYSTEMPFP:41650
Power Transfer DiagramNDS0009U
System DescriptionNDS0009V
DESCRIPTION

Electronic control allows optimal distribution of torque to front/rear wheels to match road conditions.

Makes possible stable driving, with no wheel spin, on snowy roads or other slippery surfaces.

On roads which do not require AWD, it contributes to improved fuel economy by driving in conditions close
to rear-wheel drive.

Sensor inputs determine the vehicle's turning condition, and in response tight cornering/braking are con-
trolled by distributing optimum torque to front wheels.
NOTE:

When driving, if there is a large difference between front and rear wheel speed which continues for a long
time, fluid temperature of drive system parts becomes too high and AWD warning lamp flashes rapidly.
(When AWD warning lamp flashes, vehicle changes to rear-wheel drive conditions.) Also, optional distri-
bution of torque sometimes becomes rigid before lamp flashes rapidly, but it is not malfunction.

If AWD warning lamp is flashing rapidly, stop vehicle and allow it to idle for some time. Flashing will stop
and AWD system will be restored.

When driving, AWD warning lamp may flash slowly if there is a significant difference in diameter of the
tires. At this time, vehicle performance is not fully available and cautious driving is required. (Continues
until engine is turned OFF.)

If the warning lamp flashes slowly during driving but remains OFF after engine is restarted, the system is
normal. If it again flashes slowly after driving for some time, vehicle must be inspected.

When the difference of revolution speed between the front and rear wheel mode the shift occasionally
changes to direct 4-wheel driving conditions automatically. This is not malfunction.
SDIA1611E

AWD SYSTEM TF-11
C E F
G H
I
J
K L
M A
B
TF
Revision: 2006 December 2006 FX35/FX45
ELECTRIC CONTROLLED COUPLING
Operation Principle
1. AWD control unit supplies command current to electric controlled coupling (AWD solenoid).
2. Control clutch is engaged by electromagnet and torque is detected in control clutch.
3. The cam operates in response to control clutch torque and applies pressure to main clutch.
4. Main clutch transmits torque to front wheels according to pressing power.

Transmission torque to front wheels is determined according
to command current.
AWD CONTROL UNIT

Controls distribution of drive power between rear-wheel drive
(0:100) and AWD (50:50) conditions according to signals from
sensors.

Self-diagnosis can be done with CONSULT-II.
SDIA2270E
SDIA1844E
SDIA2273E

TROUBLE DIAGNOSIS TF-21
C E F
G H
I
J
K L
M A
B
TF
Revision: 2006 December 2006 FX35/FX45
*: The values are changed by throttle opening and engine speed. RR RH SENSOR [km/h] or [mph]
Wheel speed (Rear wheel
right) Vehicle stopped 0.00 km/h (0.00 mph)
Vehicle running
CAUTION:
Check air pressure of tire under
standard condition. Approximately equal to
the indication on speed-
ometer (Inside of ±10%)
RR LH SENSOR [km/h] or [mph] Wheel speed (Rear wheel
left) Vehicle stopped 0.00 km/h (0.00 mph)
Vehicle running
CAUTION:
Check air pressure of tire under
standard condition. Approximately equal to
the indication on speed-
ometer (Inside of ±10%)
BATTERY VOLT [V] Power supply voltage for
AWD control unit Ignition switch: ON Battery voltage
THRTL POS SEN [%] Throttle opening condition When depressing accelerator pedal
(Value rises gradually in response to
throttle position.) 0 - 100%
ETS SOLENOID [A] Monitored value of current at
AWD solenoid Engine running

At idle speed
Approx. 0.000A
Engine running

When depressing accelerator
pedal Approx. 0.000 - 2.400A*
STOP LAMP SW [ON/OFF] Condition of brake pedal
operation Brake pedal: Depressed ON
Brake pedal: Released OFF
ENG SPEED SIG [RUN/STOP] Condition of engine running Engine stopped
(Engine speed: Less than 400 rpm) STOP
Engine running
(Engine speed: 400 rpm or more) RUN
ETS ACTUATOR [ON/OFF] Operating condition of AWD
actuator relay (integrated in
AWD control unit) Engine stopped (Ignition
switch: ON) OFF
Engine running ON
4WD WARN LAMP [ON/OFF] AWD warning lamp condition AWD warning lamp: ON ON
AWD warning lamp: OFF OFF
4WD MODE MON [AUTO] Control status of AWD Engine running AUTO
DIS-TIRE MONI [mm] Improper size tire installed
condition Vehicle running with normal size tire
installed 0-4 mm
Vehicle running with improper size
tire installed (Front/rear tire size dif-
ference, wear condition) 4-8 mm, 8- mm
P BRAKE SW [ON/OFF] Condition of parking brake Parking brake operated ON
Parking brake not operated OFF
Monitored item [Unit] Content Condition Display value

TROUBLE DIAGNOSES WT-13
C
D
F
G H
I
J
K L
M A
B
WT
Revision: 2006 December 2006 FX35/FX45
TROUBLE DIAGNOSESPFP:00004
SchematicNES000GS
TEWM0148E

WT-20
TROUBLE DIAGNOSES
Revision: 2006 December 2006 FX35/FX45
Transmitter Wake Up OperationNES000GW
WITH ACTIVATION TOOL
1. With the activation tool (J-45295) pushed against the front-left transmitter, press the button for 5 seconds.

When ignition switch ON, as the low tire pressure warning
lamp blinks per the following diagram, the respective transmit-
ter then must be woken up.
2. Register the ID of wheel that warning lamp flashes. When wake up of registered wheel has been com- pleted, turn signal lamp flashes two times.
3. After completing wake up all transmitters, make sure low tire pressure warning lamp goes out.
SEIA0460E
SEIA0378E

WW-8
FRONT WIPER AND WASHER SYSTEM
Revision: 2006 December 2006 FX35/FX45
COMBINATION SWITCH READING FUNCTION
Description

BCM reads combination switch (wiper) status, and controls related systems such as head lamps and wip-
ers, according to the results.

BCM reads information of a maximum of 20 switches by combining five output terminals (OUTPUT 1-5)
and five input terminals (INPUT 1-5).
Operation Description

BCM activates transistors of output terminals (OUTPUT 1-5) periodically and, and allows current to flow in
turn.

If any (1 or more) switches are turned ON, circuit of output terminals (OUTPUT 1-5) and input terminals
(INPUT 1-5) becomes active.

At this time, transistors of output terminals (OUTPUT 1-5) are activated to allow current to flow. When volt-
age of input terminals (INPUT 1-5) corresponding to that switch changes, interface in BCM detects volt-
age change, and BCM determines that switch is ON.
PKIC9702E