INFINITI FX35 2007 Service Manual

TROUBLE DIAGNOSIS TF-17
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Revision: 2006 July 2007 FX35/FX45
Wiring Diagram — AWD —NDS000A2
TDWM0056E

TF-18
TROUBLE DIAGNOSIS
Revision: 2006 July 2007 FX35/FX45
TDWM0057E

TROUBLE DIAGNOSIS TF-19
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Revision: 2006 July 2007 FX35/FX45
TDWM0058E

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-22
TROUBLE DIAGNOSIS
Revision: 2006 July 2007 FX35/FX45
*: The values are changed by throttle opening and engine speed.
CONSULT-II Function (ALL MODE AWD/4WD)NDS000A5
FUNCTION
CONSULT-II can display each diagnostic item using the diagnostic test modes shown following.
CONSULT-II SETTING PROCEDURE
Refer to GI-38, "CONSULT-II Start Procedure" .
SELF-DIAG RESULT MODE
Operation Procedure
1. Perform “CONSULT-II Start Procedure”. Refer to GI-38, "CONSULT-II Start Procedure" .
2. Start engine and drive at 30 km/h (19 MPH) or more for approx. 1 minute.
3. Stop vehicle. With engine at idle, touch “SELF-DIAG RESULTS”. Display shows malfunction experienced since the last erasing
operation.
NOTE:

The details for “TIME” are as follow:
–“0”: Error currently detected with AWD control unit.
–Except for “0”: Error detected in the past and memorized
with AWD control unit.
Detects frequency of driving after DTC occurs (frequency
of turning ignition switch “ON”).
Display Item List
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
Diagnostic test mode Function
Reference
page
Self-diagnostic results

Self-diagnostic results can be read and erased quickly. TF-22
Data monitor
Input/Output data in the AWD control unit can be read.TF-24
CAN diagnostic support monitor
The results of transmit/receive diagnosis of CAN communication can be read.LAN-44
Active test
Diagnostic Test Mode in which CONSULT-II drives some actuators apart from
the AWD control unit and also shifts some parameters in a specified range. TF-25
ECU part number
AWD control unit part number can be read.
TF-25
SDIA2217E
Items (CONSULT-II screen
terms) Diagnostic item is detected when... Check item
CONTROLLER FAILURE
[C1201] Malfunction has occurred inside AWD control unit.
TF-27, "
AWD Control Unit"
ABS SYSTEM
[C1203] Malfunction related to wheel sensor has been detected by ABS actu-
ator and electric unit (control unit). TF-27, "ABS System"
4WD SOLENOID
[C1204] Malfunction related to AWD solenoid has been detected.
TF-28, "AWD Solenoid"
4WD ACTUATOR RLY
[C1205] Malfunction has been detected from AWD actuator relay integrated
with AWD control unit, or malfunction related to AWD solenoid has
been detected. TF-31, "AWD Actuator
Relay" or
TF-28, "AWD
Solenoid"
ENGINE SIGNAL 1
[C1210] Malfunction has been detected from ECM. TF-32, "Engine Control Sig-
nal"
CAN COMM CIRCUIT
[U1000] When AWD control unit is not transmitting or receiving CAN commu-
nication signal for 2 seconds or more. TF-32, "CAN Communica-
tion Line"
NO DTC IS DETECTED.
FURTHER TESTING MAY BE
REQUIRED. No NG item has been detected. —

TROUBLE DIAGNOSIS TF-23
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Revision: 2006 July 2007 FX35/FX45
CAUTION:

If “CAN COMM CIRCUIT [U1000]” is displayed with other DTCs, first perform the trouble diagnosis for CAN communica-
tion line.

Make sure that ABS warning lamp turns OFF by driving for a minute at vehicle speed of 30 km/h (19 MPH) or more after
turning ignition switch “OFF” if AWD warning lamp turns ON with system malfunction of “ABS SYSTEM [C1203]”. AWD
warning lamp may not turn OFF if it is normal unless ignition switch turns OFF at once and engine restarts after that.
How to Erase Self-Diagnostic Results
1. Perform applicably inspection of malfunctioning item and then repair or replace.
2. Start engine and drive at 30 km/h (19 MPH) or more for approx. 1 minute.
3. Make sure that ABS warning lamp turns OFF.
NOTE:
Make sure that ABS warning lamp turns OFF by driving for a minute at vehicle speed of 30 km/h
(19 MPH) or more after turning ignition switch “OFF” if AWD warning lamp turns ON with system
malfunction of “ABS SYSTEM [C1203]”. AWD warning lamp may not turn OFF if it is normal unless
ignition switch turns OFF at once and engine restarts after that.
4. Turn ignition switch “OFF” to erase memory.
5. Start engine and select “SELF-DIAG RESULTS” mode for “ALL MODE AWD/4WD” with CONSULT-II.
6. Touch “ERASE” on CONSULT-II screen to erase DTC memory. CAUTION:
If memory cannot be erased, perform applicably diagnosis.
7. Drive at 30 km/h (19 MPH) or more for approx. 1 minute. Be sure AWD warning lamp is OFF.

TF-24
TROUBLE DIAGNOSIS
Revision: 2006 July 2007 FX35/FX45
DATA MONITOR MODE
Operation Procedure
1. Perform “CONSULT-II Start Procedure”. Refer to GI-38, "CONSULT-II Start Procedure" .
2. Touch “DATA MONITOR”.
3. Select from “SELECT MONITOR ITEM”, screen of data monitor mode is displayed. NOTE:
When malfunction is detected, CONSULT-II performs REAL-TIME DIAGNOSIS.
Also, any malfunction detected while in this mode will be displayed at real time.
Display Item List
× : Standard –: Not applicable
Monitored item (Unit) Monitor item selection
Remarks
ECU INPUT
SIGNALS MAIN
SIGNALS SELECTION
FROM MENU
FR RH SENSOR
(km/h) or (mph) ××× Wheel speed calculated by front wheel sensor RH
signal is displayed.
FR LH SENSOR
(km/h) or (mph) ××× Wheel speed calculated by front wheel sensor LH
signal is displayed.
RR RH SENSOR
(km/h) or (mph) ×××
Wheel speed calculated by rear wheel sensor RH
signal is displayed.
RR LH SENSOR
(km/h) or (mph) ××× Wheel speed calculated by rear wheel sensor LH
signal is displayed.
BATTERY VOLT
(V) ––
×Power supply voltage for AWD control unit
THRTL POS SEN
(%) ––
×Throttle opening status is displayed.
ETS SOLENOID
(A) ––
×Monitored value of current at AWD solenoid
STOP LAMP SW
(ON/OFF) ––
× Stop lamp switch signal status via CAN communica-
tion line is displayed.
ENG SPEED SIG
(RUN/STOP) ––
×Engine status is displayed.
ETS ACTUATOR
(ON/OFF) ––
× Operating condition of AWD actuator relay (inte-
grated in AWD control unit) is displayed.
4WD WARN LAMP
(ON/OFF) ––
×Control status of AWD warning lamp is displayed.
4WD MODE SW
(AUTO) ––
×AWD lock switch is not equipped, but displayed.
4WD MODE MON
(AUTO) ––
×Control status of AWD is displayed.
DIS-TIRE MONI
(mm) ––
×Improper size tire installed condition is displayed.
P BRAKE SW
(ON/OFF) ––
× Parking switch signal status via CAN communica-
tion line is displayed.
Voltage
(V) ––
× The value measured by the voltage probe is dis-
played.

TROUBLE DIAGNOSIS TF-25
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Revision: 2006 July 2007 FX35/FX45
ACTIVE TEST MODE
Description
Use this mode to determine and identify the details of a malfunction based on self-diagnostic results or data
monitor. AWD control unit gives drive signal to actuator with receiving command from CONSULT-II to check
operation of actuator.
Test Item
CAUTION:
Do not continuously energize for a long time.
AWD CONTROL UNIT PART NUMBER
Ignore the AWD control unit part number displayed in the “ECU PART NUMBER”.
Refer to parts catalog to order the AWD control unit.
Frequency
(Hz) ––
×
The value measured by the pulse probe is dis-
played.
DUTY-HI (high)
(%) ––
×
DUTY-LOW (low)
(%) ––
×
PLS WIDTH-HI
(msec) ––
×
PLS WIDTH-LOW
(msec) ––
×
Monitored item (Unit)
Monitor item selection
Remarks
ECU INPUT
SIGNALS MAIN
SIGNALS SELECTION
FROM MENU
Test item Condition Description
ETS S/V
(Detects AWD solenoid valve)

Vehicle stopped

Engine running

No DTC detected

Change command current value to AWD solenoid, and then change driv-
ing mode. (Monitor value is normal if it is within approximately ±10% of
command value.)
Qu: Increase current value in increments of 0.20A
Qd: Decrease current value in increments of 0.20A
UP: Increase current value in increments of 0.02A
DOWN: Decrease current value in increments of 0.02A

TF-26
TROUBLE DIAGNOSIS FOR SYSTEM
Revision: 2006 July 2007 FX35/FX45
TROUBLE DIAGNOSIS FOR SYSTEMPFP:00000
Power Supply Circuit for AWD Control UnitNDS000A6
CONSULT-II REFERENCE VALUE IN DATA MONITOR MODE
Data are reference value.
DIAGNOSTIC PROCEDURE
1. 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- minals and ground.
5. Turn ignition switch “OFF”.
6. Check voltage between AWD control unit harness connector ter- minals and ground.
OK or NG
OK >> GO TO 2.
NG >> Check the following. If any items are damaged, repair or replace damaged parts.

10A fuse [No. 12 or 21, located in the fuse block (J/B)]

Harness for short or open between battery and AWD control unit harness connector terminal 9

Harness for short or open between ignition switch and AWD control unit harness connector ter-
minal 7

Ignition switch. Refer to PG-3, "POWER SUPPLY ROUTING CIRCUIT" .
Monitored item [Unit] Condition Display value (Approx.)
BATTERY VOLT [V] Ignition switch: ON Battery voltage
Connector Terminal Voltage (Approx.)
M92 7 - Ground
Battery voltage
9 - Ground
SDIA2319E
Connector Terminal Voltage (Approx.)
M92 7 - Ground 0V
9 - Ground Battery voltage
SDIA2320E