2004 INFINITI FX35 sensor

TROUBLE DIAGNOSIS
BRC-31
[VDC/TCS/ABS]
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BRC
Revision: 2004 November 2004 FX35/FX45
CAUTION:
When “START (NISSAN BASED VHCL)” is touched immediately after starting engine or turning on
ignition switch, “ABS” might not be displayed in the system selection screen. In this case, repeat
the operation from step 1.
4. Return to the Monitor Item Selection screen, and touch “ECU INPUT SIGNALS”, “MAIN SIGNALS” or
“SELECTION FROM MENU”. Refer to the following information.
5. When “START” is touched, the data monitor screen is displayed.
Display Item List
Item
(Unit)Data monitor item selection
Remarks
ECU INPUT
SIGNALSMAIN
SIGNALSSELECTION
FROM MENU
GEAR×××Gear position judged by PNP
switch signal is displayed.
FR RH SENSOR
(km/h, MPH)×××Wheel speed calculated by front
RH wheel sensor signal is dis-
played.
FR LH SENSOR
(km/h, MPH)×××Wheel speed calculated by front
LH wheel sensor signal is dis-
played.
RR RH SENSOR
(km/h, MPH)×××Wheel speed calculated by rear
RH wheel sensor signal is dis-
played.
RR LH SENSOR
(km/h, MPH)×××Wheel speed calculated by rear
LH wheel sensor signal is dis-
played.
BATTERY VOLT
(V)×××Voltage supplied to ABS actuator
and electric unit (control unit) is
displayed.
SLCT LVR POSI×××Shift position judged by PNP
switch signal.
ACCEL POS SIG
(%)×––Throttle valve open/close status
judged by CAN communication
signal is displayed.
ENGINE SPEED
(rpm)×××Engine speed judged by CAN
communication signal is displayed.
STR ANGLE SIG
(deg)×––Steering angle detected by steer-
ing angle sensor is displayed.
YAW RATE SEN
(d/s)××–Yaw rate detected by yaw rate
sensor is displayed.
DECEL G-SEN (AWD model)
(G)×××Longitudinal acceleration detected
by decel G-sensor is displayed.
SIDE G-SENSOR
(m/s
2 )×––Lateral acceleration detected by
side G-sensor is displayed.
PRESS SENSOR
(bar)×––Brake fluid pressure detected by
pressure sensor is displayed.
STOP LAMP SW
(ON/OFF)×××Stop lamp switch (ON/OFF) status
is displayed.
OFF SW
(ON/OFF) ×× ×VDC OFF switch (ON/OFF) sta-
tus is displayed.
ABS WARN LAMP
(ON/OFF)–××ABS warning lamp (ON/OFF) sta-
tus is displayed.
SLIP LAMP
(ON/OFF)–××SLIP indicator lamp (ON/OFF) sta-
tus is displayed.
FR LH IN SOL
(ON/OFF)–××Front LH IN ABS solenoid (ON/
OFF) status is displayed.

TROUBLE DIAGNOSIS
BRC-35
[VDC/TCS/ABS]
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BRC
Revision: 2004 November 2004 FX35/FX45
For Fast and Accurate DiagnosisAFS001SR
PRECAUTIONS FOR DIAGNOSIS

Before performing diagnosis, always read precautions. Refer to BRC-12, "How to Proceed With Diagno-
sis" .

If ABS actuator and electric unit (control unit), steering angle sensor, steering system parts or suspension
system parts have been replaced, or if alignment has been adjusted, be sure to adjust neutral position of
steering angle sensor before driving. Refer to BRC-6, "
Adjustment of Steering Angle Sensor Neutral Posi-
tion" .

After diagnosis is finished, be sure to erase memory. Refer to BRC-27, "SELF-DIAGNOSIS" .

When checking continuity and voltage between units, be sure to check for disconnection, looseness,
bend, or collapse of connector terminals. If any malfunction is found, repair or replace connector termi-
nals.

For intermittent symptoms, possible cause is malfunction in harness, harness connector, or terminals.
Move harness, harness connector, and terminals to check for poor connections.

If a circuit tester is used for the check, be careful not to forcibly extend any connector terminal.

To use CONSULT-II to perform self-diagnosis of ABS actuator and electric unit (control unit), active tests,
or work support, first stop work, then connect CONSULT-II and select “ABS”.

While self-diagnostic results of CONSULT-II shows malfunction, if CONSULT-II active test is performed,
an engine system error may be indicated. In this case, start engine to resume the normal screen.

VDC/TCS/ABS system electronically controls brake operation and engine output. The following symptoms
may be caused by normal operations:
Symptom Symptom description Result
Motor operation noiseThis is noise of motor inside ABS actuator and electric unit (control unit).
Slight noise may occur during VDC, TCS, and ABS operation.
Normal
When the vehicle speed goes over 20 km/h (12.5 MPH), motor and
valves operating noise may be heard. It happens only once after IGN
(ignition) is ON. This is a normal status of the system operation check.
System operation check
noiseWhen engine starts, slight “click” noise may be heard from engine room.
This is normal and is part of system operation check.Normal
VDC/TCS operation
(SLIP indicator lamp blink-
ing)TCS may activate momentarily if wheel speed changes when driving
over location where friction coefficient varies, when up/downshifting, or
when fully depressing accelerator pedal.
Normal
Cancel the VDC/TCS
function for the
inspection on a chas-
sis dynamometer. For inspection of speedometer or other instruments, press
VDC OFF SW to turn VDC/TCS function off.
When accelerator pedal is depressed on a chassis dynamometer (fixed
front-wheel type), vehicle speed will not increase. This is not normal. It is
result of TCS being activated by stationary front wheels. Warning lamp
may also illuminate to indicate “sensor system error”. This is also nor-
mal, and is the result of the stationary front wheels being detected. To be
certain, restart engine, and drive vehicle at 30 km/h (19 MPH) or more.
Make sure warning lamp does not illuminate.
ABS operation (Longer stop-
ping distance)On roads with low friction coefficients, such as snowy roads or gravel
roads, vehicles with ABS may require a longer stopping distance. There-
fore, when driving on such roads, avoid overconfidence and keep speed
sufficiently low.Normal
Insufficient feeling of accel-
erationDepending on road conditions, driver may feel that feeling of accelera-
tion is insufficient. This is because traction control, which controls
engine and brakes to achieve optimal traction, has the highest priority
(for safety). As a result, there may be times when acceleration is slightly
less than usual for the same accelerator pedal operation.Normal

TROUBLE DIAGNOSIS
BRC-37
[VDC/TCS/ABS]
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BRC
Revision: 2004 November 2004 FX35/FX45
BASIC INSPECTION 3: ABS WARNING LAMP, VDC OFF INDICATOR LAMP, SLIP INDICATOR
LAMP AND BRAKE WARNING LAMP INSPECTION
1. Make sure ABS warning lamp, VDC OFF indicator lamp (when VDC OFF switch is OFF), and SLIP indica-
tor lamp turns on approximately 2 second, and brake warning lamp turns on when ignition switch is turned
ON. If they do not, check VDC OFF indicator lamp and then VDC OFF switch. Refer to BRC-53, "
VDC
OFF SWITCH" . Check CAN communications. Refer to “CAN Communication Inspection”. If there are no
errors with VDC OFF switch and CAN communication system, check combination meter. Refer to DI-4,
"COMBINATION METERS" .
2. Make sure ABS warning lamp, VDC OFF indicator lamp, SLIP indicator lamp turn off approximately 2 sec-
ond after turn ignition switch ON, and brake warning lamp turns off after engine starts. If lamps do not turn
off, perform self-diagnosis.
3. With engine running, make sure VDC OFF indicator lamp turns on and off when VDC OFF switch is
turned ON and OFF. If indicator lamp status does not correspond to switch operation, check the VDC OFF
switch system. Refer to BRC-53, "
VDC OFF SWITCH" .
4. Make sure ABS warning lamp, VDC OFF indicator lamp, and SLIP indicator lamp turn off 2 seconds after
engine is started. If ABS warning lamp, VDC OFF indicator lamp, and SLIP indicator lamp have not turned
off 10 seconds after engine has been started, perform self-diagnosis of ABS actuator and electric unit
(control unit).
5. After performing the self-diagnosis, be sure to erase the error memory. Refer to BRC-27, "
SELF-DIAGNO-
SIS" .
CAUTION:
Brake warning lamp turns on when parking brake is operated (switch on) and brake fluid level
switch is activated (leak of brake fluid).
Inspection 1: Wheel Sensor SystemAFS001ST
DTC C1101-C1108
After using the CONSULT-II SELF-DIAG RESULTS to determine the location of the malfunctioning wheel sen-
sor, check all areas to determine the component to be replaced.
CAUTION:

Do not measure the resistance value and also voltage between sensor terminal with tester etc.,
because sensor is an active sensor.

Do not expand terminal of connector with a tester terminal stick, when it does the inspection with
tester.
INSPECTION PROCEDURE
1. CHECK TIRE
Check air pressure, wear and size.
Are air pressure, wear, and size within the standard values?
YES >> GO TO 2.
NO >> Adjust air pressure, or replace tire.
2. CHECK SENSOR AND SENSOR ROTOR

Check the condition of the sensor mount (for looseness, etc.).

Check the surface of front sensor rotor rubber for damage.

Check rear sensor rotor for damage.
OK or NG
OK >> GO TO 3.
NG >> Repair sensor mount or replace sensor rotor.

BRC-38
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS
Revision: 2004 November 2004 FX35/FX45
3. CHECK SELF-DIAGNOSTIC RESULTS
Check the self-diagnostic results.
Is the above displayed in the self-diagnosis display items?
YES >> GO TO 4.
NO >> INSPECTION END.
4. CHECK CONNECTOR
1. Disconnect ABS actuator and electric unit (control unit) connector and malfunctioning wheel sensor con-
nector E46 (FR-LH), E33 (FR-RH) or B69 (RR). Check terminal for deformation, open circuit, poor con-
tact, etc., and repair or replace if any malfunctioning condition is found.
2. Reconnect connectors, drive at a speed of approximately 30 km/h (19 MPH) or more for approximately
1minute, and perform self-diagnosis.
OK or NG
OK >> Connector terminal contact is loose, damaged, open or shorted.
NG >> GO TO 5.
Self-diagnosis results
FR RH SENSOR-1,-2
FR LH SENSOR- 1,-2
RR RH SENSOR-1,-2
RR LH SENSOR-1,- 2

TROUBLE DIAGNOSIS
BRC-39
[VDC/TCS/ABS]
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BRC
Revision: 2004 November 2004 FX35/FX45
5. CHECK WHEEL SENSOR HARNESS
1. Turn ignition switch OFF and disconnect malfunctioning wheel
sensor connector E46 (FR-LH), E33 (FR-RH) or B69 (RR) and
ABS actuator and electric unit (control unit) connector.
2. Check continuity between terminals. (Also check the continuity
when steering wheel is turned right and left and when sensor
harness inside wheel well is moved.)
OK or NG
OK >> GO TO 6.
NG >> Repair or replace harness and connector that have malfunction.
6. CHECK WHEEL SENSOR
1. Replace wheel sensor that resulted in malfunction by self-diagnosis.
2. Reconnect connectors, drive vehicle at 30 km/h (19 MPH) or more for approximately 1 minute, and then
perform self-diagnosis.
Is above displayed on self-diagnosis display?
OK >> Wheel sensor has malfunction.
NG >>

Replace ABS actuator and electric unit (control unit).

Perform to self-diagnosis again, and make sure that the result shows “NO DTC IS DETECTED.
FURTHER TESTING MAY BE REQUIRED”.
Inspection 2: Engine SystemAFS001SU
DTC C1130-C1133, C1136
SFIA1186E
Power system Signal system Ground system
WheelABS actuator
and electric unit
(control unit)
harness con-
nector E56Wheel sensor
harness con-
nector E46,
E33 or B69ABS actuator
and electric unit
(control unit)
harness con-
nector E56Wheel sensor
harness con-
nector E46,
E33 or B69ABS actuator and
electric unit (con-
trol unit) harness
connector E56
(signal)ABS actuator
and electric unit
(control unit)
harness con-
nector E56
(ground)
Front RH (E33) 34 (W) 1 (W) 33 (B) 2 (B) 33 (B), 34 (W)
16 (B), 47 (B) Front LH (E46) 45 (R) 1 (R) 46 (G) 2 (G) 45 (R), 46 (G)
Rear RH (B69) 43 (Y) 1 (Y) 42 (BR) 2 (BR) 43 (Y), 42 (BR)
Rear LH (B69) 36 (L) 3 (L) 37 (P) 4 (P) 36 (L), 37 (P)
Power system : Continuity should exist.
Signal system : Continuity should exist.
Ground system : Continuity should not exist.

BRC-40
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS
Revision: 2004 November 2004 FX35/FX45
INSPECTION PROCEDURE
1. CHECK SELF-DIAGNOSTIC RESULTS
Check the self-diagnostic results.
Is the above displayed in the self-diagnosis display items?
YES >> GO TO 2.
NO >> INSPECTION END
2. CHECK ENGINE SYSTEM
1. Perform an ECM self-diagnosis and repair or replace malfunctioning items. Re-perform ECM self-diagno-
sis.
2. Re-perform ABS actuator and electric unit (control unit) self-diagnosis.
OK or NG
OK >> INSPECTION END
NG >> Repair or replace malfunctioning items. Re-perform the self-diagnosis.
Inspection 3: VDC/TCS/ABS Control Unit SystemAFS001SV
DTC C1110
INSPECTION PROCEDURE
1. CHECK SELF-DIAGNOSTIC RESULTS
Check the self-diagnostic results.
Is the above displayed in the self-diagnosis display items?
YES >> Replace ABS actuator and electric unit (control unit). Re-perform the self-diagnosis.
NO >> INSPECTION END
Inspection 4: Pressure Sensor SystemAFS001SW
DTC C1142
INSPECTION PROCEDURE
1. CHECK SELF-DIAGNOSTIC RESULTS
Check the self-diagnostic results.
Is the above displayed in the self-diagnosis display items?
YES >> GO TO 2.
NO >> INSPECTION END
Self-diagnostic results
ENGINE SIGNAL 1
ENGINE SIGNAL 2
ENGINE SIGNAL 3
ENGINE SIGNAL 4
ENGINE SIGNAL 6
Self-diagnostic results
CONTROLLER FAILURE
Self-diagnostic results
PRESS SEN CIRCUIT

TROUBLE DIAGNOSIS
BRC-41
[VDC/TCS/ABS]
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BRC
Revision: 2004 November 2004 FX35/FX45
2. CHECK CONNECTOR
1. Disconnect pressure sensor connector and ABS actuator and electric unit (control unit) connector, check
terminals for deformation, disconnection, looseness, and so on. If any malfunction is found, repair or
replace terminal.
2. Reconnect connectors and Re-perform ABS actuator and electric unit (control unit) self-diagnosis.
OK or NG
OK >> Connector terminal contact is loose, damaged, open or shorted.
NG >> GO TO 3.
3. CHECK PRESSURE SENSOR HARNESS
1. Turn ignition switch OFF and disconnect pressure sensor con-
nector and ABS actuator and electric unit (control unit) connec-
tor.
2. Check continuity between ABS actuator and electric unit (control
unit) harness connector E56 and pressure sensor harness con-
nector E53.
OK or NG
OK >> GO TO 4.
NG >> If the open or short in harness, repair or replace harness.
4. PRESSURE SENSOR INSPECTION
1. Connect pressure sensor connector and ABS actuator and electric unit (control unit) connector.
2. Use CONSULT-II “Data Monitor” to check pressure sensor value.
OK or NG
OK >> INSPECTION END
NG >> Pressure sensor is damaged or malfunctioning, replace pressure sensor.
SFIA1188E
ABS actuator and electric
unit (control unit)
(Harness connector E56)Pressure sensor
(Harness connector E53)Continuity
19 (L) 1 (L) Yes
20 (Y) 2 (Y) Yes
18 (W) 3 (W) Yes
Condition Data monitor display
When brake pedal is depressed. Positive value
When brake pedal is released. Approx. 0 bar

BRC-42
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS
Revision: 2004 November 2004 FX35/FX45
Inspection 5: Steering Angle Sensor SystemAFS001SX
DTC C1143
INSPECTION PROCEDURE
1. CHECK SELF-DIAGNOSTIC RESULTS
Check the self-diagnostic results.
Is the above displayed in the self-diagnosis item?
YES >> GO TO 2.
NO >> INSPECTION END
2. CHECK CONNECTOR
1. Disconnect steering angle sensor connector and ABS actuator and electric unit (control unit) connector
and check terminals for deformation, disconnection, looseness, and so on. If any malfunction is found,
repair or replace terminal.
2. Reconnect connectors and Re-perform a ABS actuator and electric unit (control unit) self-diagnosis.
OK or NG
OK >> Connector terminal contact is loose, damaged, open or shorted.
NG >> GO TO 3.
Self-diagnosis results
ST ANG SEN CIRCUIT