2005 INFINITI FX35 steering wheel

BRC-8
[VDC/TCS/ABS]
SYSTEM DESCRIPTION
Revision: 2005 July 2005 FX
SYSTEM DESCRIPTIONPFP:00000
System DiagramAFS001SB
VDC FunctionAFS001SC

In addition to the TCS/ABS function, the driver steering amount and brake operation amount are detected
from steering angle sensor and pressure sensor, and the vehicle's driving status (amount of under steer-
ing / over steering) is determined from information from G sensor, wheel sensor, etc., and this information
is used to improve vehicle stability by controlling the braking and engine power to all four wheels.

SLIP indicator lamp flashes to inform the driver of VDC operation.

During VDC operation, body and brake pedal lightly vibrate and mechanical noises may be heard. This is
normal.

ABS warning lamp, VDC OFF indicator lamp, and SLIP indicator lamp might turn on when vehicle is sub-
ject to strong shaking or large vibration, such as when vehicle is on a turn table, a ship or a steep slope
such as bank while engine is running. In this case, restart engine on a normal road, and if ABS warning
lamp, VDC OFF indicator lamp, and SLIP indicator lamp turn off, there is no malfunction.
TCS FunctionAFS001SD

The wheel spin of the drive wheels is detected by ABS actuator and electric unit (control unit) from the
wheel speed signals from four wheels, so if wheel spin occurs, drive wheel right and left brake fluid pres-
sure control and engine fuel cut are performed while throttle value is restricted to reduce the engine
torque and decrease the amount of wheel spin. In addition, the degree throttle is opened is controlled to
achieve the optimum engine torque.

Depending on road circumstances, the driver may have a sluggish feel. This is normal, because the opti-
mum traction has the highest priority under TCS operation.

TCS may be activated any time vehicle suddenly accelerates, suddenly down/upshifts, or is driven on a
road with a varying surface friction coefficient.

During TCS operation, it informs a driver of system operation by flashing SLIP indicator lamp.
ABS FunctionAFS001SE

The anti-lock brake system is a function that detects wheel revolution while braking, and it improves han-
dling stability during sudden braking by electrically preventing 4 wheel lock. Maneuverability is also
improved for avoiding obstacles.

If the electrical system malfunctions, then the fail-safe function starts, the ABS becomes inoperative, and
ABS warning lamp turns on.

Electrical system diagnosis by CONSULT-II is available.

During ABS operation, brake pedal lightly vibrates and a mechanical noise may be heard. This is normal.
SFIA1160E

TROUBLE DIAGNOSIS BRC-23
[VDC/TCS/ABS]
C
D E
G H
I
J
K L
M A
B
BRC
Revision: 2005 July 2005 FX
Control Unit Input/Output Signal StandardAFS001SP
REFERENCE VALUE FROM CONSULT-II
CAUTION:
The display shows ABS actuator and electric unit (control unit) calculation data, so a normal value
might be displayed even in the event the output circuit (harness) is open or short-circuited.
Monitor item Display content Data monitor
Check item
Condition Reference value in
normal operation
SLCT LVR POSI A/T shift position P: P position
R: R position
N: N position
D: D position
—
GEAR A/T gear position 1: 1st gear
2: 2nd gear
3: 3rd gear
4: 4th gear
5: 5th gear
FR RH SENSOR
FR LH SENSOR
RR RH SENSOR
RR LH SENSOR Wheel speed Vehicle stopped 0 [km/h (MPH)]
BRC-37, "
Inspection 1:
Wheel Sensor Circuit"Vehicle running (Note 1) Almost in accor-
dance with speed-
ometer display
(within ±10 %)
ACCEL POS SIG Open/close condition
of throttle valve (linked
with accelerator pedal). Accelerator pedal not
depressed (ignition switch is
ON) 0 %
Communication circuit
between VDC/TCS/ABS
control unit and ECM
Depress accelerator pedal
(ignition switch is ON) 0 to 100 %
ENGINE SPEED With engine running With engine stopped 0 rpm
EC section
Engine running Almost in accor-
dance with
tachometer display
STR ANGLE SIG Steering angle
detected by steering
angle sensor Straight-ahead Approx. 0 deg
BRC-42, "
Inspection 5:
Steering Angle Sensor
Circuit"Steering wheel turned –756 to 756 deg
YAW RATE SEN Yaw rate detected by
yaw rate sensor Vehicle stopped Approx. 0 d/s
BRC-44, "
Inspection 6:
Yaw Rate/Side G Sensor
(2WD Model), Yaw Rate/
Side/Decel G sensor
(AWD Models) Circuit"
Vehicle running –100 to 100 d/s
SIDE G-SENSOR Transverse G detected
by side G sensor Vehicle stopped
Approx. 0 m/s
2BRC-44, "Inspection 6:
Yaw Rate/Side G Sensor
(2WD Model), Yaw Rate/
Side/Decel G sensor
(AWD Models) Circuit"
Vehicle running–16.7 to 16.7 m/s2
PRESS SENSOR Brake fluid pressure
detected by pressure
sensor With ignition switch turned ON
and brake pedal released Approx. 0 bar
BRC-40, "Inspection 4:
Pressure Sensor Circuit"With ignition switch turned ON
and brake pedal depressed 0 to 170 bar
BATTERY VOLT Battery voltage sup-
plied to ABS actuator
and electric unit (con-
trol unit) Ignition switch ON 10 to 16 V BRC-48, "
Inspection 9:
ABS Actuator and Elec-
tric Unit (Control Unit)
Power Supply and
Ground Circuit"
STOP LAMP SW Brake pedal operation
Brake pedal depressed ON
BRC-50, "
Inspection 10:
Stop Lamp Switch Cir-
cuit"Brake pedal not depressed OFF

BRC-28
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS
Revision: 2005 July 2005 FX
Display Item List
Self-diagnostic item Malfunction detecting condition Check system
FR LH SENSOR- 1
[C1104] Circuit of front LH wheel sensor is open, shorted or sensor power
voltage is unusual.
BRC-37, "
Inspection 1:
Wheel Sensor Circuit"
(Note 1)
RR RH SENSOR- 1
[C1101] Circuit of rear RH wheel sensor is open, shorted or sensor power
voltage is unusual.
FR RH SENSOR- 1
[C1103] Circuit of front RH wheel sensor is open, shorted or sensor power
voltage is unusual.
RR LH SENSOR- 1
[C1102] Circuit of rear LH wheel sensor is open, shorted or sensor power
voltage is unusual.
FR LH SENSOR- 2
[C1108] ABS actuator and electric unit (control unit) can not identify sen-
sor pulses, because of large gap between wheel sensor and sen-
sor rotor.
RR RH SENSOR- 2
[C1105] ABS actuator and electric unit (control unit) can not identify sen-
sor pulses, because of large gap between wheel sensor and sen-
sor rotor.
FR RH SENSOR- 2
[C1107] ABS actuator and electric unit (control unit) can not identify sen-
sor pulses, because of large gap between wheel sensor and sen-
sor rotor.
RR LH SENSOR- 2
[C1106] ABS actuator and electric unit (control unit) can not identify sen-
sor pulses, because of large gap between wheel sensor and sen-
sor rotor.
STOP LAMP SW
[C1116] Stop lamp switch circuit is open or shorted. BRC-50, "
Inspection 10:
Stop Lamp Switch Cir-
cuit"
PRESS SEN CIRCUIT
[C1142] Pressure sensor signal line is open or shorted, or sensor power
voltage is unusual, or pressure sensor is malfunctioning. BRC-40, "Inspection 4:
Pressure Sensor Circuit"
ST ANG SEN CIRCUIT
[C1143] Neutral position of steering angle sensor is dislocated, or steer-
ing angle sensor is malfunctioning. BRC-42, "Inspection 5:
Steering Angle Sensor
Circuit"
YAW RATE SENSOR
[C1145] Yaw rate sensor has generated an error, or yaw rate sensor sig-
nal line is open or shorted. BRC-44, "
Inspection 6:
Yaw Rate/Side G Sensor
(2WD Model), Yaw Rate/
Side/Decel G sensor
(AWD Models) Circuit"

TROUBLE DIAGNOSIS BRC-29
[VDC/TCS/ABS]
C
D E
G H
I
J
K L
M A
B
BRC
Revision: 2005 July 2005 FX
FR LH IN ABS SOL
[C1120] Circuit of front LH IN ABS solenoid is open or shorted, or control
line is open or shorted to power supply or ground.
BRC-46, "
Inspection 7:
Solenoid and VDC
Change-Over Valve Cir-
cuit"
FR LH OUT ABS SOL
[C1121] Circuit of front LH OUT ABS solenoid is open or shorted, or con-
trol line is open or shorted to power supply or ground.
RR RH IN ABS SOL
[C1126] Circuit of rear RH IN ABS solenoid is open or shorted, or control
line is open or shorted to power supply or ground.
RR RH OUT ABS SOL
[C1127] Circuit of rear RH OUT ABS solenoid is open or shorted, or con-
trol line is open or shorted to power supply or ground.
FR RH IN ABS SOL
[C1122] Circuit of front RH IN ABS solenoid is open or shorted, or control
line is open or shorted to power supply or ground.
FR RH OUT ABS SOL
[C1123] Circuit of front RH OUT ABS solenoid is open or shorted, or con-
trol line is open or shorted to power supply or ground.
RR LH IN ABS SOL
[C1124] Circuit of rear LH IN ABS solenoid is open or shorted, or control
line is open or shorted to power supply or ground.
RR LH OUT ABS SOL
[C1125] Circuit of rear LH OUT ABS solenoid is open or shorted, or con-
trol line is open or shorted to power supply or ground.
CV1
[C1164] Primary side VDC switch-over solenoid valve 1 (cut valve 1) is
open or shorted, or control line is open or shorted to power sup-
ply or ground.
CV2
[C1165] Secondary side VDC switch-over solenoid valve 2 (cut valve 2) is
open or shorted, or control line is open or shorted to power sup-
ply or ground.
SV1
[C1166] Primary side VDC switch-over solenoid valve 1 (suction valve 1)
is open or shorted, or control line is open or shorted to power
supply or ground.
SV2
[C1167] Secondary side VDC switch-over solenoid valve 2 (suction valve
2) is open or shorted, or control line is open or shorted to power
supply or ground.
PUMP MOTOR (Note 3)
[ C 1111 ] During actuator motor operation with ON, when actuator motor
turns OFF or when control line for actuator motor relay is open. BRC-47, "
Inspection 8:
Actuator Motor Circuit"During actuator motor operation with OFF, when actuator motor
turns ON or when control line for relay is shorted to ground.
ABS SENSOR
[ABNORMAL SIGNAL]
[C1115] Wheel sensor input is malfunction. BRC-37, "
Inspection 1:
Wheel Sensor Circuit"
(Note 1)
BATTERY VOLTAGE
[ABNORMAL]
[C1109] ABS actuator and electric unit (control unit) power voltage is too
low. BRC-48, "
Inspection 9:
ABS Actuator and Elec-
tric Unit (Control Unit)
Power Supply and
Ground Circuit"
ST ANG SEN SIGNAL
[C1144] Neutral position correction of steering angle sensor is not fin-
ished. BRC-42, "Inspection 5:
Steering Angle Sensor
Circuit"ST ANG SEN COM CIR
[C1156] CAN communication line or steering angle sensor has generated
an error.
SIDE G-SEN CIRCUIT
[C1146] Side G sensor is malfunctioning, or signal line of side G sensor is
open or shorted. BRC-44, "
Inspection 6:
Yaw Rate/Side G Sensor
(2WD Model), Yaw Rate/
Side/Decel G sensor
(AWD Models) Circuit"
CONTROLLER FAILURE
[C1110] Internal malfunction of ABS actuator and electric unit (control
unit) BRC-40, "Inspection 3:
VDC/TCS/ABS Control
Unit Circuit"
Self-diagnostic item Malfunction detecting condition Check system

TROUBLE DIAGNOSIS BRC-31
[VDC/TCS/ABS]
C
D E
G H
I
J
K L
M A
B
BRC
Revision: 2005 July 2005 FX
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
SIGNALS MAIN
SIGNALS SELECTION
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]
C
D E
G H
I
J
K L
M A
B
BRC
Revision: 2005 July 2005 FX
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 noise This 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
noise When 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-
eration Depending 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-39
[VDC/TCS/ABS]
C
D E
G H
I
J
K L
M A
B
BRC
Revision: 2005 July 2005 FX
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 supply circuit Signal circuit Ground circuit
Wheel ABS actuator
and electric unit
(control unit)
harness con-
nector E56 Wheel sensor
harness con-
nector E46,
E33 or B69 ABS actuator
and electric unit
(control unit)
harness con-
nector E56 Wheel sensor
harness con-
nector E46,
E33 or B69 ABS 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 supply circuit : Continuity should exist.
Signal circuit : Continuity should exist.
Ground circuit : Continuity should not exist.

TROUBLE DIAGNOSIS BRC-43
[VDC/TCS/ABS]
C
D E
G H
I
J
K L
M A
B
BRC
Revision: 2005 July 2005 FX
3. CHECK STEERING ANGLE SENSOR HARNESS
1. Check CAN communication circuit. Refer to BRC-53, "
Inspection 14: CAN Communication Circuit" .
2. Turn ignition switch OFF and disconnect steering angle sensor connector.
3. Check continuity between steering angle sensor harness con- nector M14 and ground.
4. Check voltage between steering angle sensor harness connec- tor M14 and ground.
OK or NG
OK >> GO TO 4.
NG >> If the open or short in harness, repair or replace harness.
4. CHECK STEERING WHEEL PLAY
Check steering wheel play. Refer to PS-10, "
CHECKING STEERING WHEEL PLAY" .
OK or NG
OK >> GO TO 5
NG >> Adjust steering wheel play.
SFIA1189E
Steering angle sensor
(Harness connector M14) Ground Continuity
2 (B) — Yes
SFIA1190E
Steering angle sensor
(Harness connector M14) Ground
Voltage (V)
(Approx.)
3 (G/R) — 12V