ACC INFINITI FX35 2007 Service Manual

AWD SYSTEM TF-13
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Revision: 2006 July 2007 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-49, "
CAN System Specification Chart" .
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.

TF-20
TROUBLE DIAGNOSIS
Revision: 2006 July 2007 FX35/FX45
Trouble Diagnosis Chart for SymptomsNDS000A3
If AWD warning lamp turns ON, perform self-diagnosis. Refer to TF-22, "SELF-DIAG RESULT MODE" .
NOTE:
Light tight-corner braking symptom may occur depending on driving conditions. This is not malfunction. Symptom Condition Check item Reference page
AWD warning lamp does not turn ON when
the ignition switch is turned to ON.
(AWD warning lamp check) Ignition switch: ON CAN communication line
TF-33
Unified meter and A/C amp.
Unified meter control unit
AWD warning lamp does not turn OFF sev-
eral seconds after engine started. Engine running CAN communication line
TF-33
Power supply and ground for AWD con-
trol unit
Unified meter and A/C amp.
Unified meter control unit
AWD solenoid
AWD actuator relay (integrated in AWD
control unit)
Wheel sensor
Heavy tight-corner braking symptom occurs
when the vehicle is driven and the steering
wheel is turned fully to either side after the
engine is started. (See NOTE.)

While driving

Steering wheel is
turned fully to either
sides CAN communication line
TF-35Accelerator pedal position signal
AWD solenoid
Mechanical malfunction of electric con-
trolled coupling (clutch sticking etc.)
Vehicle does not enter AWD mode even
though AWD warning lamp turned to OFF. While driving AWD solenoid
TF-36
Mechanical malfunction of electric con-
trolled coupling (Mechanical engage-
ment of clutch is not possible.)
While driving, AWD warning lamp flashes
rapidly. (When flashing in approx. 1 minute
and then turning OFF.)
Rapid flashing: 2 times/second While driving Protection function is activated due to
heavy load to electric controlled cou-
pling. (AWD system is not malfunction-
ing. Also, optional distribution of torque
sometimes becomes rigid before lamp
flashes rapidly, but it is not malfunction.) TF-37
While driving, AWD warning lamp flashes
slowly. (When continuing to flash until turn-
ing ignition switch OFF)
Slow flashing: 1 time/2 seconds
While driving

Vehicle speed: 20 km/h
(12 MPH) or more Tire size is different between front and
rear of vehicle. TF-37

TROUBLE DIAGNOSIS TF-21
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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

TF-28
TROUBLE DIAGNOSIS FOR SYSTEM
Revision: 2006 July 2007 FX35/FX45
2. CHECK DTC AFTER DRIVING
1. Turn ignition switch “OFF”.
2. Start engine and drive vehicle at 30 km/h (19 MPH) for at least 1 minute.
3. Make sure that ABS warning lamp turns OFF.
4. Perform erase self-diagnostic results. Refer to TF-23, "
How to Erase Self-Diagnostic Results" .
5. Stop vehicle and turn ignition switch “OFF”.
6. Turn ignition switch “ON”.
7. Perform self-diagnosis.
Is the
“ABS SYSTEM [C1203]” displayed?
YES >> GO TO 3.
NO >> INSPECTION END
3. CHECK AWD CONTROL UNIT
Check AWD control unit input/output signal. Refer to TF-21, "
AWD Control Unit Input/Output Signal Reference
Va l u e s" .
OK or NG
OK >> GO TO 4.
NG >> Check AWD control unit pin terminals for damage or loose connection with harness connector. If
any items are damaged, repair or replace damaged parts.
4. CHECK DTC
Perform the self-diagnosis, after driving a vehicle for a while.
OK or NG
OK >> INSPECTION END
NG >> Perform self-diagnosis with ABS actuator and electric unit (control unit) again. Refer to BRC-25,
"DESCRIPTION" .
AWD SolenoidNDS000A9
CONSULT-II REFERENCE VALUE IN DATA MONITOR MODE
Data are reference value.
*: The values are changed by throttle opening and engine speed.
DIAGNOSTIC PROCEDURE

Check the following if “4WD SOLENOID [C1204]” is displayed in self-diagnostic results of CONSULT-II.
Monitored item [Unit] Condition Display value
ETS SOLENOID [A] Engine running At idle speed Approx. 0.000A
When depressing accelerator pedal Approx. 0.000 - 2.400A*

TROUBLE DIAGNOSIS FOR SYSTEM TF-29
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Revision: 2006 July 2007 FX35/FX45
1. CHECK AWD SOLENOID SIGNAL
With CONSULT-II
1. Start engine.
2. Select “DATA MONITOR” mode for “ALL MODE AWD/4WD” with CONSULT-II.
3. Read out the value of “ETS SOLENOID”.
*: The values are changed by throttle opening and engine speed.
OK or NG
OK >> GO TO 6.
NG >> GO TO 2.
2. CHECK POWER SUPPLY
1. Turn ignition switch “OFF”.
2. Disconnect AWD control unit harness connector.
3. Turn ignition switch “ON”. (Do not start engine.)
4. Check voltage between AWD control unit harness connector ter- minal 9 and ground.
OK or NG
OK >> GO TO 3.
NG >> Check the following. If any items are damaged, repair or replace damaged parts.

10A fuse [No. 21, located in the fuse block (J/B)]

Harness for short or open between battery and AWD
control unit harness connector terminal 9
3. CHECK AWD SOLENOID CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect AWD control unit harness connector.
3. Check resistance between AWD control unit harness connector terminals 1 and 2.
OK or NG
OK >> GO TO 6.
NG >> GO TO 4.
Condition Display value
Engine running At idle speed Approx. 0.000A
When depressing accelerator
pedal Approx. 0.000 - 2.400A*
SDIA1885E
Connector Terminal Voltage (Approx.)
M92 9 - Ground Battery voltage
SDIA1884E
Connector Terminal Resistance (Approx.)M92 1 - 2 (Ground) 2.45 Ω
SDIA1928E

TROUBLE DIAGNOSIS FOR SYMPTOMS TF-35
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Revision: 2006 July 2007 FX35/FX45
4. CHECK AWD CONTROL UNIT
Check AWD control unit input/output signal. Refer to TF-21, "
AWD Control Unit Input/Output Signal Reference
Va l u e s" .
OK or NG
OK >> GO TO 5.
NG >> Check AWD control unit pin terminals for damage or loose connection with harness connector. If any items are damaged, repair or replace damaged parts.
5. CHECK OUTPUT SIGNAL WITH UNIFIED METER AND A/C AMP.
With CONSULT-II
1. Turn ignition switch “ON”. (Do not start engine.)
2. Select “DATA MONITOR” mode for “METER A/C AMP” with CONSULT-II.
3. Start the engine, and then make sure that “4WD W/L” display turns from “ON” to “OFF” after several seconds.
OK or NG
OK >> GO TO 6.
NG >> Perform trouble diagnosis for combination meter. Refer to DI-16, "
Trouble Diagnosis" .
6. SYMPTOM CHECK
Check again.
OK or NG
OK >> INSPECTION END
NG >> Replace unified meter control unit assembly. Refer to DI-25, "
Disassembly and Assembly of Com-
bination Meter" .
Heavy Tight-Corner Braking Symptom Occurs When The Vehicle Is Driven and
The Steering Wheel Is Turned Fully to Either Side after The Engine Is Started
NDS000AF
NOTE:
Light tight-corner braking symptom may occur depending on driving conditions. This is not malfunc-
tion.
DIAGNOSTIC PROCEDURE
1. CHECK SYSTEM FOR CAN COMMUNICATION LINE
Perform self-diagnosis. Refer to TF-22, "
SELF-DIAG RESULT MODE" .
Is the
“CAN COMM CIRCUIT [U1000]” displayed?
YES >> Perform trouble diagnosis for CAN communication line. Refer to TF-32, "CAN Communication
Line" .
NO >> GO TO 2.
2. CHECK ACCELERATOR PEDAL POSITION SIGNAL CIRCUIT
Perform self-diagnosis for ECM. Refer to EC-54, "
Emission-Related Diagnostic Information" (VQ35DE mod-
els) or EC-716, "
Emission-related Diagnostic Information" (VK45DE models).
Is any malfunction detected by self-diagnosis?
YES >> Check the malfunctioning system.
NO >> GO TO 3.
Monitor item Condition Display value
4WD W/L Ignition switch ON ON
Start engine (after several seconds) OFF
SDIA2065E

WT-1
ROAD WHEELS & TIRES
E SUSPENSION
CONTENTS
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Revision: 2006 July 2007 FX35/FX45
ROAD WHEELS & TIRES
INDEX FOR DTC ........................................................ 3
DTC No. Index .................................................... ..... 3
PRECAUTIONS ..................................................... ..... 4
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ............................................................. ..... 4
Precautions ......................................................... ..... 4
Service Notice or Precautions ............................. ..... 5
PREPARATION ...................................................... ..... 6
Special Service Tools .......................................... ..... 6
Commercial Service Tools ................................... ..... 6
NOISE, VIBRATION AND HARSHNESS (NVH)
TROUBLESHOOTING ........................................... ..... 7
NVH Troubleshooting Chart ................................ ..... 7
ROAD WHEEL ....................................................... ..... 8
Inspection ............................................................ ..... 8
ALUMINUM WHEEL ........................................ ..... 8
STEEL WHEEL (FOR EMERGENCY USE) .... ..... 8
ROAD WHEEL TIRE ASSEMBLY ......................... ..... 9
Balancing Wheels (Bonding Weight Type) .......... ..... 9
REMOVAL ........................................................ ..... 9
WHEEL BALANCE ADJUSTMENT ................. ..... 9
Tire Rotation ........................................................ ... 10
TIRE PRESSURE MONITORING SYSTEM .......... ....11
System Components ........................................... .... 11
System Description ............................................. .... 11
TRANSMITTER ................................................ .... 11
REMOTE KEYLESS ENTRY RECEIVER ........ .... 11
BCM (BODY CONTROL MODULE) ................. ... 12
LOW TIRE PRESSURE WARNING LAMP ...... ... 12
RUN-FLAT TIRE WARNING LAMP ................. ... 12
DISPLAY UNIT ................................................. ... 13
CAN COMMUNICATION ....................................... ... 14
System Description ............................................. ... 14
TROUBLE DIAGNOSES ....................................... ... 15
Schematic ........................................................... ... 15
Wiring Diagram — T/WARN — ........................... ... 16
Control Unit Input/Output Signal Standard .......... ... 19
ID Registration Procedure ................................... ... 20
ID REGISTRATION WITH ACTIVATION TOOL ... 20 ID REGISTRATION WITHOUT TRANSMITTER
ACTIVATION TOOL ......................................... ... 21
Transmitter Wake Up Operation .......................... ... 22
WITH ACTIVATION TOOL ............................... ... 22
Self-Diagnosis ..................................................... ... 23
DESCRIPTION ................................................. ... 23
FUNCTION ....................................................... ... 23
LOW TIRE PRESSURE WARNING LAMP DIAG-
NOSTIC CHART ............................................... ... 23
RUN-FLAT TIRE WARNING LAMP DIAGNOS-
TIC CHART ...................................................... ... 24
CONSULT-II Function (BCM) .............................. ... 25
FUNCTION ....................................................... ... 25
CONSULT-II SETTING PROCEDURE ............. ... 25
WORK SUPPORT MODE ................................ ... 25
SELF-DIAGNOSTIC RESULTS MODE ............ ... 26
DATA MONITOR MODE ................................... ... 27
ACTIVE TEST MODE ...................................... ... 27
How to Perform Trouble Diagnosis for Quick and
Accurate Repair ................................................... ... 30
INTRODUCTION .............................................. ... 30
WORK FLOW ................................................... ... 30
Preliminary Check ............................................... ... 31
Malfunction Code/Symptom Chart ....................... ... 32
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC
ITEMS ..................................................................... ... 33
Transmitter or Control Unit (BCM) ....................... ... 33
MALFUNCTION CODE NO. 21, 22, 23 OR 24 ... 33
Transmitter - 1 ..................................................... ... 33
MALFUNCTION CODE NO. 31, 32, 33, 34, 41,
42, 43, 44, 45, 46, 47 OR 48 ............................ ... 33
Transmitter - 2 ..................................................... ... 34
MALFUNCTION CODE NO. 35, 36, 37 OR 38 ... 34
Vehicle Speed Signal ........................................... ... 35
MALFUNCTION CODE NO. 52 ........................ ... 35
TROUBLE DIAGNOSIS FOR SYMPTOMS ........... ... 36
Low Tire Pressure Warning Lamp Does Not Come
On When Ignition Switch Is Turned On ............... ... 36
Low Tire Pressure Warning Lamp Stays On When
Ignition Switch Is Turned On ............................... ... 36

TROUBLE DIAGNOSES WT-25
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Revision: 2006 July 2007 FX35/FX45
CONSULT-II Function (BCM)NES000KR
FUNCTION
CONSULT-II can display each self-diagnostic item using the diagnostic test modes shown following.
CONSULT-II SETTING PROCEDURE
Perform “CONSULT-II Start Procedure”. Refer to GI-38, "CONSULT-II Start Procedure" .
WORK SUPPORT MODE
Operation Procedure
1. Touch necessary test item.
2. The “Work support” screen will be displayed, so perform the fol- lowing test.
Test Item

ID Read

ID Regist
ID Read
The registered ID number is displayed.
ID Regist
Refer to WT-20, "ID Registration Procedure" .
BCM
diagnosis part Diagnostic test mode Function Reference
Air pressure
monitor WORK SUPPORT
This mode enables a technician to adjust some devices
faster and more accurately by following the indications on
CONSULT-II. WT-25, "
WORK SUPPORT
MODE".
SELF-DIAGNOSTIC
RESULTS Self-diagnostic results can be read and erased quickly. WT-26, "
SELF-DIAGNOS-
TIC RESULTS MODE".
DATA MONITOR Input/Output data in the control unit can be read. WT-27, "
DATA MONITOR
MODE".
ACTIVE TEST Diagnostic Test Mode in with CONSULT-II drives some
actuators apart from the control unit (BCM) and also shifts
some parameters in a specified range. WT-27, "
ACTIVE TEST
MODE".
SEIA0583E
SEIA0584E

WT-30
TROUBLE DIAGNOSES
Revision: 2006 July 2007 FX35/FX45
How to Perform Trouble Diagnosis for Quick and Accurate RepairNES000GY
INTRODUCTION

Before troubleshooting, verify customer complaints.

If a vehicle malfunction is difficult to reproduce, harnesses, harness connectors or terminals may be mal-
functioning. Hold and shake these parts to make sure they are securely connected.

When using a circuit tester to measure voltage or resistance of each circuit, be careful not to damage or
deform connector terminals.
WORK FLOW
Preliminary check: WT-31Self-diagnosis:WT-23Trouble diagnosis for symptoms: WT-36
SEIA0100E

WW-4
FRONT WIPER AND WASHER SYSTEM
Revision: 2006 July 2007 FX35/FX45
FRONT WIPER AND WASHER SYSTEMPFP:28810
Components Parts and Harness Connector LocationNKS00326
System DescriptionNKS00327

All front wiper relays (HI, LO) are included in IPDM E/R (intelligent power distribution module engine
room).

Wiper switch (combination switch) is composed of a combination of 5 output terminals and 5 input termi-
nals. Terminal combination status is read by BCM (body control module) when switch is turned ON.

BCM controls front wiper LO, HI, and INT (intermittent) operation.

IPDM E/R operates wiper motor according to CAN communication signals from BCM.
OUT LINE
Power is supplied at all times

through 50 A fusible link (letter M, located in fuse, fusible link and relay box.)

to BCM terminal 55,

through 15 A fuse [No. 22, located in fuse block (J/B)]

to BCM terminal 42,

through 30 A fuse (No. 73, located in IPDM E/R)

to front wiper relay, located in IPDM E/R,

through 15 A fuse (No. 78, located in IPDM E/R) and

through 10 A fuse (No. 71, located in IPDM E/R)

to CPU located in IPDM E/R.
When the ignition switch is ON or START position, power is supplied

to ignition relay located in IPDM E/R, from battery direct,

through 15 A fuse [No. 1, located in fuse block (J/B)]

to BCM terminal 38,

through ignition relay, located in IPDM E/R
PKIC9701E