SYSTEMBRC-25
< SYSTEM DESCRIPTION > [VDC/TCS/ABS]
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• 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 ac tuator 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 suspended for VDC function and TCS func-
tion. However, ABS function and EBD function operate normally.
Refer to BRC-39, "
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 an
d 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 electric unit (control unit) via
CAN communication.
Steering angle sensor Transmits the steering an
gle sensor signal to ABS actuator an d electric unit (control unit) via
CAN communication.
Combination meter Transmits the following signals to ABS actuator an
d 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: August 2015 2016 Versa Note
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BRC-26
< SYSTEM DESCRIPTION >[VDC/TCS/ABS]
SYSTEM
VDC/TCS/ABS : ABS Function
INFOID:0000000012430839
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 easily bypassed by steering operation.
• During braking, control units calculate wheel speed and pseudo-vehicle speed, and transmit pressure
increase, hold or decrease signals 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 tendencies 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-28, "
VDC/TCS/ABS : Fail-safe".
INPUT SIGNAL AND OUTPUT SIGNAL
AWFIA0808GB
JPFIC0140GB
Revision: August 2015 2016 Versa Note
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BRC-30
< SYSTEM DESCRIPTION >[VDC/TCS/ABS]
SYSTEM
C1120 When a malfunction is detected 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 dete
cted in front RH ABS IN valve.
C1123 When a malfunction is dete cted in front RH ABS OUT valve.
C1124 When a malfunction is dete cted in rear LH ABS IN valve.
C1125 When a malfunction is dete cted in rear LH ABS OUT valve.
C1126 When a malfunction is detected 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
C1164 When a malfunction is detected in cut valve 1. The following functions are sus-
pended:
•VDC
•TCS
•ABS
•EBD
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 information in ABS
actuator and electric unit (control unit) is not the same. The following functions are sus-
pended:
•VDC
•TCS
•ABS
U1000 When CAN communication signal is not continuously transmitted or received for 2
seconds or more.
The following functions are sus-
pended:
•VDC
•TCS
U1002
When ABS actuator and electric unit (control unit) is not transmitting or receiving
CAN communication signal for 2 seconds or less.
U1010 When detecting error during the initial diagnosis of CAN controller of ABS actuator
and electric unit (control unit)
DTC
Malfunction detected condition Fail-safe condition
Revision: August 2015 2016 Versa Note
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DIAGNOSIS SYSTEM [ABS ACTUATOR AND ELECTRIC UNIT (CONTROL
UNIT)]
BRC-33
< SYSTEM DESCRIPTION > [VDC/TCS/ABS]
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× : Applicable
–: Not applicable
ACTIVE TEST MODE
CAUTION:
• Do not perform active test while driving vehicle.
• Make sure to completely bleed air from brake system.
• The active test cannot be performed with the ABS warning lamp, VDC OFF indicator lamp, SLIP indi-
cator lamp or brake warning lamp on.
• ABS warning lamp, VDC OFF indi cator lamp, SLIP indicator lamp and brake warning lamp turn on
during active test.
NOTE:
• When active test is performed while depressing the pedal, the pedal depression amount will change. This is normal.
• “TEST IS STOPPED” is displayed 10 seconds after operation start.
• After “TEST IS STOPPED” is displayed, to perform test again, touch BACK.
Test Item
ABS SOLENOID VALVE• Select “Up”, “Keep” and “Down”. Then use screen monitor to check that solenoid valve operates as shown in
the table below.
SV1
(On/Off) ––
×Suction valve 1(On/Off) status is displayed.
SV2
(On/Off) ––
×Suction valve 2 (On/Off) status is displayed.
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.
Item
(Unit) Data monitor item selection
Remarks
ECU INPUT
SIGNALS MAIN
SIGNALS SELECTION
FROM MENU
Revision: August 2015 2016 Versa Note
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DIAGNOSIS SYSTEM [ABS ACTUATOR AND ELECTRIC UNIT (CONTROL
UNIT)]
BRC-35
< SYSTEM DESCRIPTION > [VDC/TCS/ABS]
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A brief moment of On/Off condition occurs every 20 seconds after ignition switch turned ON. This is not malfunction because it is an
operation for checking.
ABS MOTOR• Select “On” and “Off”. Make sure motor relay and actuator relay operates as shown in table below.
NOTE:
A brief moment of On/Off condition occurs every 20 seconds after ignition switch turned ON. This is not malfunction because it is an
operation for checking.
WORK SUPPORT
Test item Display item Display
On Off
ABS MOTOR MOTOR RELAY
OnOff
ACTUATOR RLY (Note) OnOn
Conditions Description
ST ANGLE SENSOR ADJUSTMENT Steering angle sensor neutral position adjustment can be per-
formed. Refer to
BRC-55, "
ADJUSTMENT OF STEERING AN-
GLE SENSOR NEUTRAL POSITION : Special Repair
Requirement".
Revision: August 2015 2016 Versa Note
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BRC-38
< ECU DIAGNOSIS INFORMATION >[VDC/TCS/ABS]
ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)
N POSI SIGTransmission 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
CV1 ABS actuator cut valve 1 When the cut valve is active
On
When the cut valve is inactive Off
CV2 ABS actuator cut valve 2 When the cut valve is active
On
When the cut valve is inactive Off
SV1 ABS actuator suction valve When the suction valve is active
On
When the suction valve is inactive Off
SV2 ABS actuator suction valve 2 When the suction valve is active
On
When the suction valve is inactive 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
Monitor item
Display content Data monitor
Condition Reference value in
normal operation
Revision: August 2015 2016 Versa Note
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ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)BRC-41
< ECU DIAGNOSIS INFORMATION > [VDC/TCS/ABS]
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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
C1154 Transmission
range switch signal or communica tion line between the ABS actuator
and electric unit (control unit) and TCM is open or shorted. 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
C1164 When a malfunction is detected in cut valve 1. The following functions are sus-
pended:
•VDC
•TCS
• ABS
• EBD
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
DTC
Malfunction detected condition Fail-safe condition
Revision: August 2015 2016 Versa Note
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