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
cardiagn.com
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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SYSTEMBRC-27
< SYSTEM DESCRIPTION > [VDC/TCS/ABS]
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Major signal transmission between each unit via communication lines is shown in the following table.
VDC/TCS/ABS : EBD FunctionINFOID:0000000012430840
SYSTEM DIAGRAM
• By preventing rear wheel slip increase through rear wheel brake force (brake fluid pressure) control that is
electronically controlled when slight skip on front and rear wheels are detected during braking, stability dur-
ing braking is improved.
• EBD function is expanded and developed from conventional ABS function and corrects rear wheel brake force to appropriate level by electronic control according to load weight (number of passengers).
Component Signal description
Combination meter Receives the following signals from ABS actuator and electric unit (control unit) via CAN com-
munication:
• VDC warning lamp signal
• ABS warning lamp signal
AWFIA0808GB
JPFIC0142GB
Revision: August 2015
2016 Versa Note
cardiagn.com
BRC-28
< SYSTEM DESCRIPTION >[VDC/TCS/ABS]
SYSTEM
• During braking, control unit portion compares slight slip on front
and rear wheels by wheel speed sensor signal, transmits drive sig-
nal to actuator portion when rear wheel slip exceeds front wheel
slip for the specified value or more, and controls rear wheel brake
force (brake fluid pressure) so that increase of rear wheel slip is
prevented and slips on front wheel and rear wheel are nearly
equalized. ABS control is applied when slip on each wheel
increases and wheel speed is the threshold value of ABS control or
less.
• CONSULT can be used to diagnose the system.
• Fail-safe function is adopted. When a malfunction occurs in EBD function, the control is suspended for VDC function, TCS function,
ABS function and EBD function. Refer to BRC-28, "
VDC/TCS/ABS
: Fail-safe".
INPUT SIGNAL AND OUTPUT SIGNAL
Major signal transmission between each unit via communication lines is shown in the following table.
VDC/TCS/ABS : Fail-safeINFOID:0000000012430841
VDC AND TCS FUNCTIONS
VDC warning lamp in combination meter turns ON when a malfunction occurs in system [ABS actuator and
electric unit (control unit)]. The control is su spended for VDC and TCS functions. However, ABS and EBD
functions operate normally.
ABS FUNCTION
ABS warning lamp and SLIP indicator lamp in combi nation meter turn ON when a malfunction occurs in sys-
tem [ABS actuator and electric unit (control unit)]. The control is suspended for VDC, TCS and ABS functions.
However, EBD functions operate normally.
EBD FUNCTION
ABS warning lamp, brake warning lamp and SLIP indicator lamp in combination meter turn ON when a mal-
function occurs in system [ABS ac tuator and electric unit (control unit) ]. The control is suspended for VDC,
TCS, ABS and EBD functions.
JPFIC0143GB
Component Signal description
Combination meter Receives the following signals from ABS actuator
and electric unit (control unit) via CAN com-
munication:
• ABS warning lamp signal
• Brake warning lamp signal
• SLIP indicator lamp signal
Revision: August 2015 2016 Versa Note
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SYSTEMBRC-29
< SYSTEM DESCRIPTION > [VDC/TCS/ABS]
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DTC Malfunction detected condition Fail-safe condition
C1101 When an open circuit is detected in rear RH wheel sensor circuit.
The following functions are sus-
pended:
•VDC
• ABS
• EBD (only when both rear wheels are malfunctioning)
C1102 When an open circuit is detected in rear LH wheel sensor circuit.
C1103 When an open circuit is detected in front RH wheel sensor circuit.
C1104 When an open circuit is detected in front LH wheel sensor circuit.
C1105
• When a short circuit is detected in rear RH wheel sensor circuit.
• When power supply voltage of rear RH wheel sensor is in following state:
- Rear RH wheel sensor power supply voltage: 7.2 V
≥ Rear RH wheel sensor pow-
er supply voltage
• When distance between rear RH wheel sensor and rear RH wheel sensor rotor is large.
• When installation of rear RH wheel sensor or rear RH wheel sensor rotor is not normal.
C1106 • When a short circuit is detected in rear LH wheel sensor circuit.
• When power supply voltage of rear LH wheel sensor is in following state:
- Rear LH wheel sensor power supply voltage: 7.2 V
≥ Rear LH wheel sensor power
supply voltage
• When distance between rear LH wheel sensor and rear LH wheel sensor rotor is
large.
• When installation of rear LH wheel sensor or rear LH wheel sensor rotor is not nor- mal.
C1107 • When a short circuit is detected in front RH wheel sensor circuit.
• When power supply voltage of front RH wheel sensor is in following state:
- Front RH wheel sensor power supply voltage: 7.2 V
≥ Front RH wheel sensor
power supply voltage
• When distance between front RH wheel sensor and front RH wheel sensor rotor is large.
• When installation of front RH wheel sensor or front RH wheel sensor rotor is not
normal.
C1108 • When a short circuit is detected in front LH wheel sensor circuit.
• When power supply voltage of front LH wheel sensor is in following state:
- Front LH wheel sensor power supply voltage: 7.2 V
≥ Front LH wheel sensor pow-
er supply voltage
• When distance between front LH wheel sensor and front LH wheel sensor rotor is large.
• When installation of front LH wheel sensor or front LH wheel sensor rotor is not normal.
C1109 • When ignition power supply voltage is in following state:
- Ignition power supply voltage: 10 V ≥
Ignition power supply voltage.
- Ignition power supply voltage: 16 V ≤ Ignition power supply voltage. The following functions are sus-
pended:
•VDC
•TCS
• ABS
• EBD
C 111 0
When there is an internal malfunction in the ABS actuator and electric unit (control
unit).
C 1111 W h e n a m a l f u n c t i o n i s d e t e c t e d i n m o t o r o r m o t o r r e l a y. The following functions are sus-
pended:
•VDC
•TCS
• ABS
C 111 5 When difference in wheel speed between any wheel and others is detected when
the vehicle is driven, because of installation of tires other than specified. The following functions are sus-
pended:
•VDC
•TCS
• ABS
• EBD
C1116 When stop lamp switch signal is not input when brake pedal operates. The following functions are sus-
pended:
•VDC
•TCS
Revision: August 2015
2016 Versa Note
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DIAGNOSIS SYSTEM [ABS ACTUATOR AND ELECTRIC UNIT (CONTROL
UNIT)]
BRC-31
< SYSTEM DESCRIPTION > [VDC/TCS/ABS]
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DIAGNOSIS SYSTEM [ABS ACTUATOR AND ELECTRIC UNIT (CONTROL
UNIT)]
CONSULT Function (ABS)INFOID:0000000012430842
APPLICATION ITEMS
CONSULT can display each diagnostic item us ing the following direct diagnostic modes.
ECU IDENTIFICATION
ABS actuator and electric unit (control unit) part number is displayed.
SELF DIAGNOSTIC RESULT
Operation Procedure
1. Before performing the “Self Diagnostic Result”, st art engine and drive vehicle at 30 km/h (19 MPH) or
more for approximately 1 minute.
How To Erase Self Diagnostic Result
1. After erasing DTC memory, start engine and drive vehicle at 30 km/h (19 MPH) or more for approximately 1 minute as the final inspection, and make sure t hat the ABS warning lamp, VDC OFF indicator lamp,
SLIP indicator lamp and brake warning lamp turn OFF.
CAUTION:
If memory cannot be erased, perform applicable diagnosis.
NOTE:
• When the wheel sensor malfunctions, after inspecting the wheel sensor system, the ABS warning lamp,
SLIP indicator lamp and brake warning lamp will not turn OFF even when the system is normal, unless
the vehicle is driven at approximately 30 km/h (19 MPH) or more for approximately 1 minute.
• Brake warning lamp will turn ON in case of parking brake operation (when switch is ON) or of brake fluid
level switch operation (when brake fluid is insufficient).
• VDC OFF switch should not stay in ON position.
Display Item List
Refer to BRC-43, "DTC Index".
DATA MONITOR
Direct Diagnostic Mode Description
ECU Identification The ABS actuator and electric unit (control unit) part number is displayed.
Self Diagnostic Result The ABS actuator and electric unit (control unit) self diagnostic results are displayed.
Data Monitor The ABS actuator and electric unit (control unit) input/output data is displayed in real time.
Active Test The ABS actuator and electric unit (control unit) activates outputs to test components.
Work support The settings for ABS actuator and electric unit (control unit) functions can be changed.
CAN DIAG SUPPORT MNTR The result of transmit/receive diagnosis of CAN communication is displayed.
Item
(Unit) Data monitor item selection
Remarks
ECU INPUT
SIGNALS MAIN
SIGNALS SELECTION
FROM MENU
FR LH SENSOR
(km/h, mph) ×× × Wheel speed (km/h, mph) calculated by front wheel
sensor LH signal is displayed.
FR RH SENSOR
(km/h, mph) ×× × Wheel speed (km/h, mph) calculated by front wheel
sensor RH signal is displayed.
RR LH SENSOR
(km/h, mph) ×× ×
Wheel speed (km/h, mph) calculated by rear wheel
sensor LH signal is displayed.
RR RH SENSOR
(km/h, mph) ×× × Wheel speed (km/h, mph) calculated by rear wheel
sensor RH signal is displayed.
Revision: August 2015
2016 Versa Note
cardiagn.com
BRC-36
< ECU DIAGNOSIS INFORMATION >[VDC/TCS/ABS]
ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)
ECU DIAGNOSIS INFORMATION
ABS ACTUATOR AND ELECTRIC
UNIT (CONTROL UNIT)
Reference ValueINFOID:0000000012430843
VALUES ON THE DIAGNOSIS TOOL
CAUTION:
The display shows the 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
Condition Reference value in
normal operation
FR LH SENSOR Wheel speed 0 [km/h, mph]
Vehicle stopped
Nearly matches the speed meter display
(± 10% or less) Vehicle running
(Note 1)
FR RH SENSOR Wheel speed 0 [km/h, mph]
Vehicle stopped
Nearly matches the speed meter display
(± 10% or less) Vehicle running
(Note 1)
RR LH SENSOR Wheel speed 0 [km/h, mph]
Vehicle stopped
Nearly matches the speed meter display
(± 10% or less) Vehicle running
(Note 1)
RR RH SENSOR Wheel speed 0 [km/h, mph]
Vehicle stopped
Nearly matches the speed meter display
(± 10% or less) Vehicle running
(Note 1)
FR RH IN SOL Operation status of all solenoid valves Actuator (solenoid valve) is active (“AC-
TIVE TEST” with CONSULT) or actuator
relay is inactive (in fail-safe mode)
On
When the actuator (solenoid valve) is not
active and actuator relay is active (igni-
tion switch ON) Off
FR RH OUT SOL Operation status of all solenoid valves Actuator (solenoid valve) is active (“AC-
TIVE TEST” with CONSULT) or actuator
relay is inactive (in fail-safe mode)
On
When the actuator (solenoid valve) is not
active and actuator relay is active (igni-
tion switch ON) Off
FR LH IN SOL Operation status of all solenoid valves Actuator (solenoid valve) is active (“AC-
TIVE TEST” with CONSULT) or actuator
relay is inactive (in fail-safe mode)
On
When the actuator (solenoid valve) is not
active and actuator relay is active (igni-
tion switch ON) Off
FR LH OUT SOL Operation status of all solenoid valves Actuator (solenoid valve) is active (“AC-
TIVE TEST” with CONSULT) or actuator
relay is inactive (in fail-safe mode)
On
When the actuator (solenoid valve) is not
active and actuator relay is active (igni-
tion switch ON) Off
RR RH IN SOL Operation status of all solenoid valves Actuator (solenoid valve) is active (“AC-
TIVE TEST” with CONSULT) or actuator
relay is inactive (in fail-safe mode)
On
When the actuator (solenoid valve) is not
active and actuator relay is active (igni-
tion switch ON) Off
Revision: August 2015
2016 Versa Note
cardiagn.com
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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