BCS
BCM
BCS-103
< ECU DIAGNOSIS INFORMATION > [WITHOUT INTELLIGENT KEY SYSTEM]
C
D
E
F
G H
I
J
K L
B A
O P
N
KEYLESS PANIC
PANIC button of keyfob not pressed Off
PANIC button of keyfob pressed
On
KEYLESS UNLOCK UNLOCK button of keyfob not pressed
Off
UNLOCK button of keyfob pressed On
PASSING SW Other than lighting switch PASS
Off
Lighting switch PASS On
PKB SW Parking brake released
Off
Parking brake engaged On
REAR DEF SW Rear window defogger switch OFF
Off
Rear window defogger switch ON On
REVERSE SW CAN Reverse switch OFF
Off
Reverse switch ON On
RR WASHER SW Rear washer switch OFF
Off
Rear washer switch ON On
RR WIPER INT Rear wiper switch OFF
Off
Rear wiper switch INT On
RR WIPER ON Rear wiper switch OFF
Off
Rear wiper switch ON On
RR WIPER STOP Any position other than rear wiper stop position
Off
Rear wiper stop position On
TAIL LAMP SW Lighting switch OFF
Off
Lighting switch 1ST On
THERMO AMP A/C and fan ON switch OFF
Off
A/C and fan ON switch ON On
TURN SIGNAL L Turn signal switch OFF
Off
Turn signal switch LH On
TURN SIGNAL R Turn signal switch OFF
Off
Turn signal switch RH On
VEHICLE SPEED While drivin g, equivalent to speedometer reading mph, km/h
WARNING LAMP Low tire pressure warning lamp in combination meter OFF
Off
Low tire pressure warning lamp in combination meter ON On
Monitor Item
ConditionValue/Status
Revision: August 2015 2016 Versa Note
cardiagn.com
BRC-1
BRAKES
C
DE
G H
I
J
K L
M
SECTION BRC
A
B
BRC
N
O P
CONTENTS
BRAKE CONTROL SYSTEM
VDC/TCS/ABS
PRECAUTION ....... ........................................
4
PRECAUTIONS .............................................. .....4
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ......
4
Precaution for Brake System ....................................4
Precaution for Brake Control System ........................5
Precaution for Harness Re pair ..................................5
PREPARATION ............................................6
PREPARATION .............................................. .....6
Special Service Tool ........................................... ......6
Commercial Service Tool ..........................................6
SYSTEM DESCRIPTION ..............................7
COMPONENT PARTS ................................... .....7
Component Parts Location .................................. ......7
Component Description .............................................8
ABS Actuator and Electric Unit (Control Unit) ...........8
Wheel Sensor and Sensor Rotor ..............................9
Stop Lamp Switch .....................................................9
Steering Angle Sensor ..............................................9
VDC OFF Switch .....................................................10
Brake Fluid Level Switch .........................................10
Parking Brake Switch ..............................................10
SYSTEM .............................................................11
VDC/TCS/ABS ....................................................... ....11
VDC/TCS/ABS : System Diagram ...........................11
VDC/TCS/ABS : System De scription ......................11
VDC/TCS/ABS : VDC Functi on ...............................22
VDC/TCS/ABS : TCS Function ........... ....................24
VDC/TCS/ABS : ABS Function ........................... ....26
VDC/TCS/ABS : EBD Functi on ...............................27
VDC/TCS/ABS : Fail-safe ......................... ..............28
DIAGNOSIS SYSTEM [ABS ACTUATOR
AND ELECTRIC UNIT (CONTROL UNIT)] .......
31
CONSULT Function (ABS) .................................. ....31
ECU DIAGNOSIS INFORMATION ..............36
ABS ACTUATOR AND ELECTRIC UNIT
(CONTROL UNIT) .............................................
36
Reference Value .................................................. ....36
Fail-safe ...................................................................39
DTC Inspection Priority Chart ..................................42
DTC Index ...............................................................43
WIRING DIAGRAM ......................................44
BRAKE CONTROL SYSTEM ...........................44
Wiring Diagram .................................................... ....44
BASIC INSPECTION ...................................52
DIAGNOSIS AND REPAIR WORK FLOW .......52
Work Flow ............................................................ ....52
Diagnostic Work Sheet ............................................53
INSPECTION AND ADJUSTMENT ..................55
ADDITIONAL SERVICE WHEN REPLACING
CONTROL UNIT .................................................... ....
55
ADDITIONAL SERVICE WHEN REPLACING
CONTROL UNIT : Description .................................
55
ADDITIONAL SERVICE WHEN REPLACING
CONTROL UNIT : Special Repair Requirement ......
55
ADJUSTMENT OF STEERING ANGLE SENSOR
NEUTRAL POSITION ............................................ ....
55
ADJUSTMENT OF STEERING ANGLE SENSOR
NEUTRAL POSITION : Description .........................
55
ADJUSTMENT OF STEERING ANGLE SENSOR
NEUTRAL POSITION : Special Repair Require-
ment .........................................................................
55
CALIBRATION OF DECEL G SENSOR ................ ....56
Revision: August 2015 2016 Versa Note
cardiagn.com
BRC-2
CALIBRATION OF DECEL G SENSOR : Descrip-
tion ..........................................................................
56
CALIBRATION OF DECEL G SENSOR : Special
Repair Requirement ..... ..........................................
56
DTC/CIRCUIT DIAGNOSIS ...................... ...58
C1101, C1102, C1103, C1104 WHEEL SEN-
SOR ................................................................. ...
58
DTC Description .................................................. ...58
Diagnosis Procedure ..............................................59
C1105, C1106, C1107, C1108 WHEEL SEN-
SOR ....................................................................
63
DTC Description .................................................. ...63
Diagnosis Procedure ..............................................64
C1109 POWER AND GROUND SYSTEM .........70
DTC Description .................................................. ...70
Diagnosis Procedure ..............................................70
C1110, C1153 ABS ACTUATOR AND ELEC-
TRIC UNIT (CONTROL UNIT) ...........................
72
DTC Description .....................................................72
Diagnosis Procedure ..............................................73
C1111 ABS MOTOR, MOTOR RELAY SYS-
TEM ....................................................................
74
DTC Description .................................................. ...74
Diagnosis Procedure ..............................................74
C1115 WHEEL SENSOR ...................................77
DTC Description .................................................. ...77
Diagnosis Procedure ..............................................77
C1116 STOP LAMP SWITCH ............................84
DTC Description .................................................. ...84
Diagnosis Procedure ..............................................85
Component Inspection ............................................87
C1120, C1122, C1124, C1126 ABS IN VALVE
SYSTEM .......................................................... ...
88
DTC Description .................................................. ...88
Diagnosis Procedure ..............................................88
C1121, C1123, C1125, C1127 ABS OUT
VALVE SYSTEM ................................................
90
DTC Description .................................................. ...90
Diagnosis Procedure ..............................................90
C1130 ENGINE SIGNAL ...................................92
DTC Description .................................................. ...92
Diagnosis Procedure ..............................................92
C1140 ACTUATOR RELAY SYSTEM ...............94
DTC Description .................................................. ...94
Diagnosis Procedure ..............................................94
C1142 PRESS SENSOR ...................................96
DTC Description .................................................. ...96
Diagnosis Procedure ..............................................96
C1143 STEERING ANGLE SENSOR ...............99
DTC Description ................................................... ...99
Diagnosis Procedure ...............................................99
C1144 INCOMPLETE STEERING ANGLE
SENSOR ADJUSTMENT .................................
103
DTC Description ................................................... .103
Diagnosis Procedure .............................................103
C1145, C1146 YAW RATE/SIDE/DECEL G
SENSOR ...........................................................
105
DTC Description ................................................... .105
Diagnosis Procedure .............................................105
C1154 TRANSMISSION RANGE SWITCH ......106
DTC Description ................................................... .106
Diagnosis Procedure .............................................106
C1155 BRAKE FLUID LEVEL SWITCH ..........108
DTC Description ................................................... .108
Diagnosis Procedure .............................................108
Component Inspection ..........................................111
C1164, C1165 CV SYSTEM .............................112
DTC Description ....................................................112
Diagnosis Procedure .............................................112
C1166, C1167 SV SYSTEM .............................114
DTC Description ....................................................114
Diagnosis Procedure .............................................114
C1170 VARIANT CODING ...............................116
DTC Description ................................................... .116
Diagnosis Procedure .............................................116
U1000 CAN COMM CIRCUIT ...........................117
DTC Description ................................................... .117
Diagnosis Procedure .............................................117
U1002 SYSTEM COMM (CAN) ........................118
DTC Description ................................................... .118
Diagnosis Procedure .............................................118
U1010 CONTROL UNIT (CAN) ........................120
DTC Description ................................................... .120
Diagnosis Procedure .............................................120
POWER SUPPLY AND GROUND CIRCUIT ....121
Diagnosis Procedure ............................................ .121
PARKING BRAKE SWITCH .............................124
Component Function Check ................................ .124
Diagnosis Procedure .............................................124
Component Inspection ..........................................125
VDC OFF SWITCH ...........................................126
Component Function Check ................................ .126
Diagnosis Procedure .............................................126
Component Inspection ..........................................127
ABS WARNING LAMP .....................................128
Component Function Check ................................ .128
Revision: August 2015 2016 Versa Note
cardiagn.com
BRC-8
< SYSTEM DESCRIPTION >[VDC/TCS/ABS]
COMPONENT PARTS
Component Description
INFOID:0000000012430827
ABS Actuator and Electric Unit (Control Unit)INFOID:0000000012430828
Electric unit (control unit) is integrated with actuator and comprehensively controls VDC function, TCS func-
tion, ABS function and EBD function.
ELECTRIC UNIT (CONTROL UNIT)
• Brake fluid pressure is controlled according to signals from each sensor.
• If malfunction is detected, the system enters fail-safe mode.
ACTUATOR
The following components are integrated with ABS actuator:
Pump
Returns the brake fluid reserved in reservoir to master cylinder by reducing pressure.
Motor
Activates the pump according to signals from ABS actuator and electric unit (control unit).
Motor Relay
Operates the motor ON/OFF according to signals fr om ABS actuator and electric unit (control unit).
Actuator Relay (Main Relay)
Operates each valve ON/OFF according to signals fr om ABS actuator and electric unit (control unit).
ABS IN Valve
A. View with steering wheel and spiral
cable removed B. Left side of instrument panel C. Left side of engine compartment
D. Left side of engine compartment E. Right side of engine compartment F. Left front wheel assembly
G. Near brake pedal area H. Left side of instrument panel I. Center of front seats (view with cen-
ter console removed)
J. Left rear wheel assembly
ALFIA0482ZZ
Component Reference/Function
1 Steering angle sensor BRC-9, "
Steering Angle Sensor"
2 VDC OFF switchBRC-10, "VDC OFF Switch"
3 IPDM E/RPCS-4, "Component Parts Location"
4 Brake fluid level switchBRC-10, "Brake Fluid Level Switch"
5 ABS actuator and electric unit (control unit)BRC-8, "ABS Actuator and Electric Unit (Control Unit)"
6 Front wheel sensorBRC-9, "Wheel Sensor and Sensor Rotor"
7 Stop lamp switchBRC-9, "Sto p La mp Sw itc h"
8 Combination meter (type A)MWI-9, "METER SYSTEM : Combination Meter"
9 Combination meter (type B)MWI-9, "METER SYSTEM : Combination Meter"
10 Parking brake switch BRC-10, "Parking Brake Switch"
11. Rear wheel sensor BRC-9, "Wheel Sensor and Sensor Rotor"
Revision: August 2015 2016 Versa Note
cardiagn.com
BRC-10
< SYSTEM DESCRIPTION >[VDC/TCS/ABS]
COMPONENT PARTS
VDC OFF Switch
INFOID:0000000012430832
• Non-operational status or standby status of VDC and TCS functions can be selected using VDC OFF switch.
VDC OFF indicator lamp indicates the operation stat us of function. (ON: Non-operational status, OFF:
Standby status)
• VDC OFF indicator lamp turns OFF (standby status) when the engine is started again after it is stopped once
while VDC OFF indicator lamp is ON (non-operational status).
Brake Fluid Level SwitchINFOID:0000000012430833
Detects the brake fluid level in reservoir tank and transmi ts converted electric signal from combination meter to
ABS actuator and electric unit (control unit) via CAN communication.
Parking Brake SwitchINFOID:0000000012430834
Detects the operation status of parking brake switch and transmits converted electric signal from combination
meter to ABS actuator and electric unit (control unit) via CAN communication.
Revision: August 2015 2016 Versa Note
cardiagn.com
BRC-12
< SYSTEM DESCRIPTION >[VDC/TCS/ABS]
SYSTEM
VALVE OPERATION (VDC AND TCS FUNCTIONS)
The control unit built in the ABS actuator and electric unit (control unit) controls fluid pressure of the brake cal-
ipers by operating each valve.
VDC and TCS Functions are Operating (Pressure Increases)
Component
Signal description
Steering angle sensor Transmits the steering angle sensor signal to ABS actuator and electric unit (control unit) via
CAN communication.
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 position 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 fr
om ABS actuator and electric un it (control unit) via CAN com-
munication:
• ABS warning lamp signal
• Brake warning lamp signal
• VDC OFF indicator lamp signal
• SLIP indicator lamp signal
JSFIA0670GB
Name Not activated Pressure increases
Cut valve 1 Power supply is not supplied (open) Power supply is supplied (close)
Cut valve 2 Power supply is not supplied (open) Power supply is supplied (close)
Suction valve 1 Power supply is not supplied (close) Power supply is supplied (open)
Suction valve 2 Power supply is not supplied (close) Power supply is supplied (open)
ABS IN valve Power supply is not supplied (open) Power supply is not supplied (open)
Revision: August 2015 2016 Versa Note
cardiagn.com
SYSTEMBRC-21
< SYSTEM DESCRIPTION > [VDC/TCS/ABS]
C
D
E
G H
I
J
K L
M A
B
BRC
N
O PCONDITIONS FOR INDICATOR LAMP ILLUMINATION
• Turns ON when VDC and TCS functions are switched to non-operational status (OFF) by VDC OFF switch.
• Turns ON when ignition switch turns ON and turns OFF when the system is normal, for bulb check purposes.
CONDITIONS FOR WARNING LAMP ILLUMINATION
Turns ON when ignition switch turns ON and turns OFF when the system is normal, for bulb check purposes.
Component Function
Pump Returns the brake fluid reserved in reservoir to master cylinder by reducing pressure.
Motor Activates the pump according to signals from ABS actuator and electric unit (control unit).
Cut valve 1
Cut valve 2 Shuts off the ordinary brake line from master cylinder.
Suction valve 1
Suction valve 2 Supplies the brake fluid from master cylinder to the pump.
ABS IN valve Switches the fluid pressure line to increase or hold according to signals from control unit.
ABS OUT valve Switches the fluid pressure line to increase, hold or decrease according to signals from control unit.
Return check valve Returns the brake fluid from brake caliper and wheel cylinder to master cylinder by bypassing orifice
of each valve when brake is released.
Reservoir Temporarily reserves the brake fluid drained from brake caliper, so that pressure efficiently decreas-
es when decreasing pressure of brake caliper and wheel cylinder.
Pressure sensor Detects the brake fluid pressure and tr ansmits signal to ABS ac tuator and electric unit (control unit).
Condition (status) VDC OFF indicator lamp SLIP indicator lamp
Ignition switch OFF OFFOFF
For approx. 1 second after the ignition switch
is turned ON ON
ON
Approx. 1 second after ignition switch is
turned ON (when the system is in normal op-
eration) OFF
OFF
When VDC OFF switch is ON (VDC function
and TCS function are OFF) ON
OFF
VDC function is malfunctioning OFFON
TCS function is malfunctioning OFFON
Condition (status)ABS warning lamp Brake warning lamp
Ignition switch OFF OFFOFF
For approx. 1 second after the ignition switch
is turned ON ON
ON
Approx. 1 second after ignition switch is
turned ON (when the system is in normal op-
eration) OFF
OFF
After engine starts OFFOFF
When parking brake operates (parking brake
switch ON) OFF
ON
When brake fluid is less than the specified
level (brake fluid level switch ON) OFF
ON
VDC function is malfunctioning OFFOFF
TCS function is malfunctioning OFFOFF
ABS function is malfunctioning ONOFF
EBD function is malfunctioning ONON
Brake limited slip differential (BLSD) function
is malfunctioning OFF
OFF
Revision: August 2015 2016 Versa Note
cardiagn.com
SYSTEMBRC-23
< SYSTEM DESCRIPTION > [VDC/TCS/ABS]
C
D
E
G H
I
J
K L
M A
B
BRC
N
O P
• 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 operat ion 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 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.
OPERATION CHARACTERISTICS
VDC Function That Prevents Oversteer Tendency
• During cornering, brake force (brake fluid pressure) 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 an
d 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 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
ALFIA0339GB
ALFIA0340GB
Revision: August 2015 2016 Versa Note
cardiagn.com