2014 NISSAN TEANA steering

SYSTEMBRC-23
< SYSTEM DESCRIPTION > [VDC/TCS/ABS]
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VDC/TCS/ABS : VDC FunctionINFOID:0000000009463753
SYSTEM DIAGRAM
SYSTEM DESCRIPTION
• Side slip or tail slip may occur while driving on a slippery road or intending an urgent evasive driving maneu- ver. VDC function detects side slip status using each s ensor when side slip or tail slip is about to occur and
improves vehicle stability by brake c ontrol and engine output control during driving.
• In addition to ABS function, EBD function and TCS functi on, target side slip amount is calculated according
to steering operation amount from steering angle sensor. By comparing this information with vehicle side slip
amount that is calculated from information from yaw rate/side G sensor and wheel sensor, vehicle driving
conditions (conditions of understeer or oversteer) are judged and vehicle stability is improved by brake force
control on all 4 wheels and engine output control.
• VDC function can be switched to non-operational status (OFF) by operating VDC OFF switch. In this case,
VDC OFF indicator lamp turns ON.
• Control unit portion automatically improves driving st ability by performing brake force control as well as
engine output control, by transmitting drive signal to actuator portion according to difference between target
side slip amount and vehicle side slip amount
Brake limited slip differential (BLSD) function
is malfunctioning OFF OFF
VDC function is operating OFF OFF
TCS function is operating OFF OFF Condition (status) ABS warnin
g lamp Brake warning lamp
ALFIA0298GB
JSFIA0672GB
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

BRC-24
< SYSTEM DESCRIPTION >[VDC/TCS/ABS]
SYSTEM
• Brake force control function
at braking hard detects driver′s brake operations with the pressure sensor,
judges a brake booster ′s maximum brake power function by using information from the vacuum sensor, and
enhances more powerful braking force by controlling brakes of four wheels.
• VDC warning lamp blinks while VDC function is in operati on and indicates to the driver that the function is in
operation.
• CONSULT can be used to diagnose the system.
• Fail-safe function is adopted. When a malfunction occurs in VDC function, the control is suspended for VDC
function and TCS function. However, ABS functi on and EBD function operate normally. Refer to BRC-41,
"Fail-safe".
INPUT SIGNAL AND OUTPUT SIGNAL
Major signal transmission between each unit via communication lines is shown in the following table.
OPERATION CHARACTERISTICS
VDC Function That Prevents Oversteer Tendency
• During cornering, brake force (brake fluid pressu re) is applied on front wheel and rear wheel on the outer
side of turn. Momentum is generated directing the vehicle toward the outer side of the turn. Oversteer is pre-
vented.
• Changing driving lane on a slippery road, when there may be a tendency to oversteer, engine output is con- trolled as well as brake force (brake fluid pr essure) of 4 wheels. Oversteer tendency decreases.
Component Signal description
ECM Transmits the following signals to ABS actuator and electric unit (control unit) via CAN commu-
nication.
• Acceleration pedal position signal
• Engine speed signal
• Target throttle position signal
TCM Transmits the current gear positi
on signal to ABS actuator and el ectric unit (control unit) via
CAN communication.
Steering angle sensor Transmits the steering angle sensor signal to ABS actuator and electric unit (control unit) via
CAN communication.
Combination meter Transmits the following signals to ABS actuator and electric unit (control unit) via CAN commu-
nication.
• Brake fluid level switch signal
• parking brake switch signal
Receives the following signals from ABS actuator and electric unit (control unit) via CAN com-
munication.
• VDC OFF indicator lamp signal
• SLIP indicator lamp signal
ALFIA0339GB
ALFIA0340GB
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

BRC-26
< SYSTEM DESCRIPTION >[VDC/TCS/ABS]
SYSTEM
• Wheel spin status of drive wheel is detected by wheel sensor of 4
wheels. Engine output and transmission shift status is controlled
so that slip rate of drive wheels is in appropriate level. When wheel
spin occurs on drive wheel, ABS actuator and electric unit (control
unit) perform brake force control of LH and RH drive wheels (apply
brake force by increasing brake fluid pressure of drive wheel) and
decrease engine torque by engine torque control. Wheel spin
amount decreases. Engine torque is controlled to appropriate
level.
• TCS function can be switched to non-operational status (OFF) by operating VDC OFF switch. In this case, VDC OFF indicator lamp
turns ON.
• SLIP indicator lamp blinks while TCS function is in operation and
indicates to the driver that the function is in operation.
• CONSULT can be used to diagnose the system.
• Fail-safe function is adopted. When a malfunction occurs in TCS
function, the control is sus pended for VDC function and TCS func-
tion. However, ABS function and EBD function operate normally.
Refer to BRC-41, "Fail-safe"
.
INPUT SIGNAL AND OUTPUT SIGNAL
Major signal transmission between each unit via communication lines is shown in the following table.
JPFIC0139GB
Component Signal description
ECM Transmits the following signals to ABS actuator and electric unit (control unit) via CAN commu-
nication.
• Accelerator pedal position signal
• Engine speed signal
• Target throttle position signal
TCM Transmits the current gear positi
on signal to ABS actuator and el ectric unit (control unit) via
CAN communication.
Steering angle sensor Transmits the steering angle sensor signal to ABS actuator and electric unit (control unit) via
CAN communication.
Combination meter Transmits the following signals to ABS actuator and electric unit (control unit) via CAN commu-
nication.
• Brake fluid level switch signal
• Parking brake switch signal
Receives the following signals from ABS actuator and electric unit (control unit) via CAN com-
munication.
• VDC OFF indicator lamp signal
• SLIP indicator lamp signal
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

SYSTEMBRC-27
< SYSTEM DESCRIPTION > [VDC/TCS/ABS]
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VDC/TCS/ABS : ABS FunctionINFOID:0000000009463755
SYSTEM DIAGRAM
• By preventing wheel lock through brake force (brake flui d pressure) control that is electronically controlled by
detecting wheel speed during braking, stability during em ergency braking is improved so that obstacles can
be avoided by steering operation.
• During braking, control units calculate wheel speeds , and transmit pressure increase, hold or decrease sig-
nals to actuator portion according to wheel slip status.
• The following effects are obtained by preventing wheel lock during braking.
- Vehicle tail slip is prevented during braking when driving straight.
- Understeer and oversteer tendencie s are moderated during brak-
ing while cornering.
- Obstacles may be easily bypassed by steering operation during
braking.
• CONSULT can be used to diagnose the system.
• Fail-safe function is adopted. When a malfunction occurs in ABS
function, the control is suspended for VDC function, TCS function
and ABS function. However, EBD function operates normally.
Refer to BRC-29, "VDC/TCS/ABS : Fail-safe"
.
INPUT SIGNAL AND OUTPUT SIGNAL
ALFIA0297GB
JPFIC0140GB
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

SYSTEMBRC-31
< SYSTEM DESCRIPTION > [VDC/TCS/ABS]
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C1116 When stop lamp switch signal is not input when brake pedal operates. The following functions are sus-
pended:
•VDC
•TCS
C1120 When a malfunction is detec ted in front LH ABS IN valve.
The following functions are sus-
pended:
•VDC
•TCS
• ABS
• EBD
C1121 When a malfunction is detected in front LH ABS OUT valve.
C1122 When a malfunction is detected in front RH ABS IN valve.
C1123 When a malfunction is det ected in front RH ABS OUT valve.
C1124 When a malfunction is detected in rear LH ABS IN valve.
C1125 When a malfunction is detected in rear LH ABS OUT valve.
C1126 When a malfunction is det ected in rear RH ABS IN valve.
C1127 When a malfunction is detected in rear RH ABS OUT valve.
C1130 When a malfunction is detected in ECM system. The following functions are sus-
pended:
•VDC
•TCS
C1140 When a malfunction is detected in actuator relay. The following functions are sus-
pended:
•VDC
•TCS
• ABS
• EBD
C1142 When a malfunction is detected in VDC pressure sensor.
The following functions are sus-
pended:
•VDC
•TCS
C1143 When a malfunction is detected in steering angle sensor.
C1144 When neutral position adjustment of steering angle sensor is not complete.
C1145 When a malfunction is detected in yaw rate signal, or signal line of yaw rate/side/
decel G sensor is open or shorted.
C1146 When a malfunction is detected in side G signal, or signal line of yaw rate/side/decel
G sensor is open or shorted.
C1153 When ABS actuator and electric
unit (control unit) is malfunctioning. (Pressure in-
crease is too much or too little.) The following functions are sus-
pended:
•VDC
•TCS
• ABS
C1155 When brake fluid level low signal is detected. The following functions are sus-
pended:
•VDC
•TCS
C1160 When calibration of yaw rate/side/decel G sensor is not complete. The following functions are sus-
pended:
•VDC
•TCS
• ABS
• EBD
C1164 When a malfunction is detected in cut valve 1.
C1165 When a malfunction is detected in cut valve 2.
C1166 When a malfunction is detected in suction valve 1.
C1167 When a malfunction is detected in suction valve 2.
C1170 When the informatio n in ABS actuator and electric unit (control unit) is not the same.The following functions are sus-
pended:
•VDC
•TCS
• ABS
C1197 When a malfunction is detected in vacuum sensor. Electrical vacuum assistance of
brake booster is suspended.
C1198 • When an open circuit is detected in vacuum sensor circuit.
• When a short circuit is detected in vacuum sensor circuit.
• When a malfunction is detected in vacuum sensor noise.
C1199 When brake booster vacuum is approx. 0 kPa (0 mmHg) during engine running. — DTC Malfunction detected condition Fail-safe condition
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

DIAGNOSIS SYSTEM [ABS ACTUATOR AND ELECTRIC UNIT (CONTROL
UNIT)]
BRC-35
< SYSTEM DESCRIPTION > [VDC/TCS/ABS]
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× : Applicable
–: Not applicable N POSI SIG
(On/Off) ––
×Neutral position (On/Off) judged by transmission
range switch signal.
P POSI SIG
(On/Off) ––
×Park position (On/Off) judged by transmission range
switch signal.
ACCEL POS SIG
(%) ×
– ×Throttle valve open/close status judged by CAN com-
munication signal is displayed.
SIDE G-SENSOR
(m/s
2) ×
– ×Transverse acceleration detected by side G-sensor is
displayed.
STR ANGLE SIG
(deg) ×
– ×Steering angle detected by steering angle sensor is
displayed.
PRESS SENSOR
(bar) ×
– ×Brake pressure detected by pressure sensor is dis-
played.
EBD SIGNAL
(On/Off) ––
×EBD operation (On/Off) status is displayed.
ABS SIGNAL
(On/Off) ––
×ABS operation (On/Off) status is displayed.
TCS SIGNAL
(On/Off) ––
×TCS operation (On/Off) status is displayed.
VDC SIGNAL
(On/Off) ––
×VDC operation (On/Off) status is displayed.
EBD FAIL SIG
(On/Off) ––
×EBD fail signal (On/Off) status is displayed.
ABS FAIL SIG
(On/Off) ––
×ABS fail signal (On/Off) status is displayed.
TCS FAIL SIG
(On/Off) ––
×TCS fail signal (On/Off) status is displayed.
VDC FAIL SIG
(On/Off) ––
×VDC fail signal (On/Off) status is displayed.
CRANKING SIG
(On/Off) ––
×The input state of the key SW START position signal
is displayed.
FLUID LEV SW
(On/Off) ×
– ×Brake fluid level switch (On/Off) status is displayed.
PARK BRAKE SW
(On/Off) ×
– ×Park brake switch (On/Off) status is displayed.
USV[FL-RR]
(On/Off) ——
×Primary side USV solenoid valve (On/Off) status is
displayed.
USV[FR-RL]
(On/Off) ——
×Secondary side USV solenoid valve (On/Off) status is
displayed.
HSV[FL-RR]
(On/Off) ——
×Primary side HSV solenoid valve (On/Off) status is
displayed.
HSV[FR-RL]
(On/Off) ——
×Secondary side HSV solenoid valve (On/Off) status is
displayed.
V/R OUTPUT
(On/Off) ——
×Valve relay operation signal (On/Off) status is dis-
played.
M/R OUTPUT
(On/Off) ——
×Motor relay operation signal (On/Off) status is dis-
played.
ENGINE RPM
(tr/min) ×
– ×Engine speed judged by CAN communication signal
is displayed.
Item
(Unit) Data monitor item selection
Remarks
ECU INPUT
SIGNALS MAIN
SIGNALS SELECTION
FROM MENU
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

DIAGNOSIS SYSTEM [ABS ACTUATOR AND ELECTRIC UNIT (CONTROL
UNIT)]
BRC-37
< SYSTEM DESCRIPTION > [VDC/TCS/ABS]
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*: Immediately after being selected, status is “O n”. Status changes to “Off” after approx. 10 seconds.
ABS MOTOR
When “On” or “Off” is selected on display screen, the following items are displayed when system is normal.
NOTE:
Display occasionally changes On/Off for a moment after i gnition switch is turned ON. This is an operation for
checking purposes and is not a malfunction.
WORK SUPPORT
CONFIGURATION
Configuration includes the following functions.
CAUTION:
Use ‘‘Manual Configuration’’ only when ‘‘TYPE ID’’ of ABS actuator and electric unit (control unit) can-
not be read.
RR LH SOLENOID
(ACT) RR LH IN SOL Off On* Off
RR LH OUT SOL Off Off Off
CV1 Off Off Off
CV2 Off On* On*
Test item Display Item
Display
Up ACT UP ACT KEEP
Test item Display Item Display
On Off
ABS MOTOR MOTOR RELAY On Off
ACTUATOR RLY
(Note)On On
Conditions Description
ST ANGLE SENSOR ADJUSTMENT Steering angle sensor neutral position adjustment can be per-
formed. Refer to BRC-58, "Work Procedure"
.
DECEL G SEN CALIBRATION Perform decel G sensor calibration.
Function Description
Read/Write Configuration Before replacing ECU
Allows the reading of vehicle spec
ification (Type ID) written in ABS
actuator and electric unit (control unit) to store the specification in
CONSULT.
After replacing ECU Allows the writing of vehicle information (Type ID) stored in CON-
SULT into the ABS actuator and electric unit (control unit).
Manual Configuration Allows the writing of vehicle specification (Type ID) into the ABS
actuator and electric unit (control unit) by hand.
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

BRC-40
< ECU DIAGNOSIS INFORMATION >[VDC/TCS/ABS]
ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)
R POSI SIGTransmission range switch signal ON/OFF
condition CVT shift position = R position On
CVT shift position = other than R position Off
N POSI SIG Transmission range switch signal ON/OFF
condition CVT shift position = N position On
CVT shift position = other than N position Off
P POSI SIG Transmission range switch signal ON/OFF
condition CVT shift position = P position On
CVT shift position = other than P position Off
ACCEL POS SIG Throttle actuator opening/closing is dis-
played (linked with accelerator pedal) Accelerator pedal not depressed (ignition
switch is ON) 0 %
Depress accelerator pedal (ignition
switch is ON) 0 - 100 %
SIDE G-SENSOR Transverse G detected by side G sensor Vehicle stopped
Approx. 0 m/s
2
Vehicle turning rightNegative value
(m/s2)
Vehicle turning left Positive value
(m/s
2)
STR ANGLE SIG Steering angle detected by steering angle
sensor Straight-ahead Approx. 0
°
Steering wheel turned –720 to 720 °
PRESS SENSOR Brake fluid pressure detected by pressure
sensor With ignition switch turned ON and brake
pedal released Approx. 0 bar
With ignition switch turned ON and brake
pedal depressed –40 to 300 bar
EBD SIGNAL EBD operation EBD is active On
EBD is inactive Off
ABS SIGNAL ABS operation ABS is active On
ABS is inactive Off
TCS SIGNAL TCS operation TCS is active On
TCS is inactive Off
VDC SIGNAL VDC operation VDC is active On
VDC is inactive Off
EBD FAIL SIG EBD fail-safe signal In EBD fail-safe On
EBD is normal Off
ABS FAIL SIG ABS fail-safe signal In ABS fail-safe On
ABS is normal Off
TCS FAIL SIG TCS fail-safe signal In TCS fail-safe On
TCS is normal Off
VDC FAIL SIG VDC fail-safe signal In VDC fail-safe On
VDC is normal Off
CRANKING SIG Crank operation Crank is active On
Crank is inactive Off
FLUID LEV SW Brake fluid level switch When brake fluid level switch ON On
When brake fluid level switch OFF Off
PARK BRAKE SW Parking brake switch Parking brake switch is active On
Parking brake switch is inactive Off
Monitor item Display content
Data monitor
Condition Reference value in
normal operation
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM