brake sensor 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.

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. —

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.