ESP INFINITI FX35 2007 Service Manual

PG-16
POWER SUPPLY ROUTING CIRCUIT
Revision: 2006 July 2007 FX35/FX45
Fuse NKS003G8

If fuse is blown, be sure to eliminate cause of malfunction before
installing new fuse.

Use fuse of specified rating. Never use fuse of more than speci-
fied rating.

Do not partially install fuse; always insert it into fuse holder prop-
erly.

Remove fuse for “ELECTRICAL PARTS (BAT)” if vehicle is not
used for a long period of time.
Fusible LinkNKS003G9
A melted fusible link can be detected either by visual inspection or by
feeling with finger tip. If its condition is questionable, use circuit
tester or test lamp.
CAUTION:

If fusible link should melt, it is possible that critical circuit
(power supply or large current carrying circuit) is shorted.
In such a case, carefully check and eliminate cause of mal-
function.

Never wrap outside of fusible link with vinyl tape. Important:
Never let fusible link touch any other wiring harness, vinyl
or rubber parts.
Circuit Breaker NKS003GA
The PTC thermistor generates heat in response to current flow. The
temperature (and resistance) of the thermistor element varies with
current flow. Excessive current flow will cause the element's temper-
ature to rise. When the temperature reaches a specified level, the
electrical resistance will rise sharply to control the circuit current.
Reduced current flow will cause the element to cool. Resistance falls
accordingly and normal circuit current flow is allowed to resume.
CEL083
CKIM0195E
SEL109W

PG-72
HARNESS CONNECTOR
Revision: 2006 July 2007 FX35/FX45
HARNESS CONNECTOR (SLIDE-LOCKING TYPE)

A new style slide-locking type connector is used on certain systems and components, especially those
related to OBD.

The slide-locking type connectors help prevent incomplete locking and accidental looseness or discon-
nection.

The slide-locking type connectors are disconnected by pushing or pulling the slider. Refer to the figure
below.
CAUTION:

Never pull the harness or wires when disconnecting the connector.

Be careful not to damage the connector support bracket when disconnecting the connector.
[Example]
SEL769V

RF-4
SQUEAK AND RATTLE TROUBLE DIAGNOSES
Revision: 2006 July 2007 FX35/FX45
SQUEAK AND RATTLE TROUBLE DIAGNOSESPFP:00000
Work FlowNIS001SU
CUSTOMER INTERVIEW
Interview the customer if possible, to determine the conditions that exist when the noise occurs. Use the Diag-
nostic Worksheet during the interview to document the facts and conditions when the noise occurs and any
customer's comments; refer to RF-8, "
Diagnostic Worksheet" . This information is necessary to duplicate the
conditions that exist when the noise occurs.

The customer may not be able to provide a detailed description or the location of the noise. Attempt to
obtain all the facts and conditions that exist when the noise occurs (or does not occur).

If there is more than one noise in the vehicle, be sure to diagnose and repair the noise that the customer
is concerned about. This can be accomplished by test driving the vehicle with the customer.

After identifying the type of noise, isolate the noise in terms of its characteristics. The noise characteristics
are provided so the customer, service adviser and technician are all speaking the same language when
defining the noise.

Squeak —(Like tennis shoes on a clean floor)
Squeak characteristics include the light contact/fast movement/brought on by road conditions/hard sur-
faces=higher pitch noise/softer surfaces=lower pitch noises/edge to surface=chirping

Creak—(Like walking on an old wooden floor)
Creak characteristics include firm contact/slow movement/twisting with a rotational movement/pitch
dependent on materials/often brought on by activity.

Rattle—(Like shaking a baby rattle)
Rattle characteristics include the fast repeated contact/vibration or similar movement/loose parts/missing
clip or fastener/incorrect clearance.

Knock —(Like a knock on a door)
Knock characteristics include hollow sounding/sometimes repeating/often brought on by driver action.

Tick—(Like a clock second hand)
Tick characteristics include gentle contacting of light materials/loose components/can be caused by driver
action or road conditions.

Thump—(Heavy, muffled knock noise)
Thump characteristics include softer knock/dead sound often brought on by activity.

Buzz—(Like a bumble bee)
Buzz characteristics include high frequency rattle/firm contact.

Often the degree of acceptable noise level will vary depending upon the person. A noise that you may
judge as acceptable may be very irritating to the customer.

Weather conditions, especially humidity and temperature, may have a great effect on noise level.
SBT842

SQUEAK AND RATTLE TROUBLE DIAGNOSES SE-5
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D E
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G H
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K L
M A
B
SE
Revision: 2006 July 2007 FX35/FX45
SQUEAK AND RATTLE TROUBLE DIAGNOSESPFP:00000
Work FlowNIS0028M
CUSTOMER INTERVIEW
Interview the customer if possible, to determine the conditions that exist when the noise occurs. Use the Diag-
nostic Worksheet during the interview to document the facts and conditions when the noise occurs and any
customer's comments; refer to SE-9, "
Diagnostic Worksheet" . This information is necessary to duplicate the
conditions that exist when the noise occurs.

The customer may not be able to provide a detailed description or the location of the noise. Attempt to
obtain all the facts and conditions that exist when the noise occurs (or does not occur).

If there is more than one noise in the vehicle, be sure to diagnose and repair the noise that the customer
is concerned about. This can be accomplished by test driving the vehicle with the customer.

After identifying the type of noise, isolate the noise in terms of its characteristics. The noise characteristics
are provided so the customer, service adviser and technician are all speaking the same language when
defining the noise.

Squeak —(Like tennis shoes on a clean floor)
Squeak characteristics include the light contact/fast movement/brought on by road conditions/hard sur-
faces=higher pitch noise/softer surfaces=lower pitch noises/edge to surface=chirping

Creak—(Like walking on an old wooden floor)
Creak characteristics include firm contact/slow movement/twisting with a rotational movement/pitch
dependent on materials/often brought on by activity.

Rattle—(Like shaking a baby rattle)
Rattle characteristics include the fast repeated contact/vibration or similar movement/loose parts/missing
clip or fastener/incorrect clearance.

Knock —(Like a knock on a door)
Knock characteristics include hollow sounding/sometimes repeating/often brought on by driver action.

Tick—(Like a clock second hand)
Tick characteristics include gentle contacting of light materials/loose components/can be caused by driver
action or road conditions.

Thump—(Heavy, muffled knock noise)
Thump characteristics include softer knock/dead sound often brought on by activity.

Buzz—(Like a bumble bee)
Buzz characteristics include high frequency rattle/firm contact.

Often the degree of acceptable noise level will vary depending upon the person. A noise that you may
judge as acceptable may be very irritating to the customer.

Weather conditions, especially humidity and temperature, may have a great effect on noise level.
SBT842

SRS-30
TROUBLE DIAGNOSIS
Revision: 2006 July 2007 FX35/FX45
3. Touch “TROUBLE DIAG RECORD”.
NOTE:
With “TROUBLE DIAG RECORD”, diagnosis results previously
erased by a reset operation can be displayed.
4. Diagnostic code is displayed on “TROUBLE DIAG RECORD”.
5. Touch “PRINT”.
6. Compare diagnostic codes to SRS-30, "
DTC No. Index (“SELF-
DIAG [PAST]” or “TROUBLE DIAG RECORD”)" .
7. Touch “BACK” key of CONSULT-II until “SELECT SYSTEM” appears.
8. Turn ignition switch OFF, then turn off and disconnect CON- SULT-II, and both battery cables.
9. Repair the system as outlined by the “Repair order” in “Intermit- tent Malfunction Diagnostic Code Chart”, that corresponds to the
self-diagnostic result. For replacement procedure of component
parts, refer to the Removal and Installation procedure for the appropriate component.
10. Go to SRS-27, "
DIAGNOSTIC PROCEDURE 3" , for final inspection.
DTC No. Index (“SELF-DIAG [PAST]” or “TROUBLE DIAG RECORD”)
SRS697
SHIA0182E
Diagnostic item Explanation Repair order
“Recheck SRS at each replacement”
NO DTC IS
DETECTED. When malfunction is
indicated by the “AIR
BAG” warning lamp in
User mode.

Low battery voltage (Less than 9V)
Go to SRS-27, "DIAGNOSTIC PRO-
CEDURE 3" .

No malfunction is detected.
Go to SRS-27, "DIAGNOSTIC PRO-
CEDURE 3" .
DRIVER AIR BAG
MODULE
[OPEN]
[B1054]

Driver air bag module circuit is open (including the spiral cable). 1. Visually check the wiring harness
connection.
2. Replace the harness if it has visible damage.
3. If the harness check result is OK, replace driver air bag module, diag-
nosis sensor unit and spiral cable.
DRIVER AIR BAG
MODULE
[VB-SHORT]
[B1055]

Driver air bag module circuit is shorted to a power supply circuit
(including the spiral cable).
DRIVER AIR BAG
MODULE
[GND-SHORT]
[B1056]

Driver air bag module circuit is shorted to ground (including the
spiral cable).
DRIVER AIR BAG
MODULE
[SHORT]
[B1057]

Driver air bag module circuit is shorted between lines.

TF-10
AWD SYSTEM
Revision: 2006 July 2007 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
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M A
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TF
Revision: 2006 July 2007 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
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Revision: 2006 July 2007 FX35/FX45
AWD Control Unit Input/Output Signal Reference ValuesNDS000A4
AWD CONTROL UNIT INSPECTION TABLE
Specifications with CONSULT-II
Monitored item [Unit] Content Condition Display value
FR RH SENSOR
(km/h) or (mph) Wheel speed
(Front 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%)
FR LH SENSOR
(km/h) or (mph) Wheel speed
(Front 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%)
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

TROUBLE DIAGNOSES WT-15
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WT
Revision: 2006 July 2007 FX35/FX45
TROUBLE DIAGNOSESPFP:00004
SchematicNES000GS
TEWM0162E

WT-22
TROUBLE DIAGNOSES
Revision: 2006 July 2007 FX35/FX45
Transmitter Wake Up OperationNES000GW
WITH ACTIVATION TOOL
1. With the transmitter 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 low tire pressure warning lamp flashes. When wake up of registered wheel has been completed, turn signal lamp flashes two times.
3. After completing wake up all transmitters, make sure low tire pressure warning lamp goes out.
SEIA0460E
SEIA0794E