Nissan Versa

 Sedan Service Manual

Brakes » Brake control system (BRC)
ABS Actuator and electric unit (control unit)

Exploded View

1. ABS actuator and electric unit (control unit) 2. ABS actuator and electric unit (control unit) harness connector 3. Bushing 4. Bracket A. To master cylinder secondary side B. To master cylinder primary side C. To front wheel cylinder (LH) D. To rear wheel cylinder (RH) E. To rear wheel cylinder (LH) F. To front wheel cylinder (RH)

Removal and Installation

CAUTION:

Be careful of the following:

• Before servicing, disconnect the battery cable from negative terminal.
• To remove brake tubes, use a suitable tool (flare nut wrench) to prevent flare nuts and brake tubes from being damaged. To install, use suitable tool (flare nut torque wrench).
• Do not apply excessive impact to ABS actuator and electric unit (control unit), such as by dropping it.
• Do not remove and install ABS actuator and electric unit (control unit) by holding harness.
• After work is completed, bleed air from brake tubes. Refer to BR "Bleeding Brake System".
• After installing harness connector on the ABS actuator and electric unit (control unit), make sure connector is securely locked.

NOTE: When removing components such as hoses, tubes/lines, etc., cap or plug openings to prevent fluid from spilling.

REMOVAL

1. Disconnect battery cable from negative terminal. Refer to PG "Removal and Installation".
2. Remove A/C high-pressure pipe. Refer to HA "Removal and Installation".
3. Remove A/C low-pressure flexible hose. Refer to HA "Removal and Installation".
4. Disconnect the harness connector from the ABS actuator and electric unit (control unit).
5. Loosen flare nut of brake tube using a flare nut wrench, and then remove brake tube from ABS actuator and electric unit (control unit). Refer to BRC "Exploded View".
6. Remove ABS actuator and electric unit (control unit) and bracket.
7. Remove bracket and bushing from ABS actuator and electric unit (control unit), if necessary.

INSTALLATION

Installation is in the reverse order of removal.

• Bleed the brake system. Refer to BR "Bleeding Brake System".

CAUTION: If ABS actuator and electronic unit (control unit) is replaced, after installation, adjust position of steering angle sensor. Refer to BRC "Work Procedure".

VDC OFF SWITCH

Removal and Installation

REMOVAL

1. Remove the instrument lower panel LH. Refer to IP "Exploded View".
2. Release pawls (A) using suitable tool and remove the VDC OFF switch.

INSTALLATION

Installation is in the reverse order of removal.

STEERING ANGLE SENSOR

Removal and Installation

REMOVAL

1. Remove the spiral cable. Refer to SR "Removal and Installation".
2. Remove the screws (A) and release the clips (B) then remove the steering angle sensor (1) from the spiral cable (2).

INSTALLATION

Installation is in the reverse order of removal.

Reset the neutral position of the steering angle sensor. Refer to BRC "Work Procedure".

CAUTION: Any time the steering angle sensor is removed and installed or replaced, the neutral position of the steering angle sensor must be reset.

Precautions

Component parts

VDC/TCS/ABS

Diagnosis system [abs actuator and electric unit (control unit)]

ABS Actuator and electric unit (control unit)

Diagnosis and repair work flow

Adjustment of steering angle sensor neutral position

C1101, C1102, C1103, C1104 Wheel sensor

C1105, C1106, C1107, C1108 Wheel sensor

C1109 Power and ground system

C1110, C1153, C1170 ABS Actuator and electric unit (control unit)

C1111 Pump motor

C1115 ABS Sensor [abnormal signal]

C1116 Stop lamp switch

C1120, C1122, C1124, C1126 ABS In valve system

C1121, C1123, C1125, C1127 ABS Out valve system

C1130 Engine signal

C1140 Actuator relay system

C1142 Press sensor

C1143 Steering angle sensor

C1144 Incomplete steering angle sensor adjustment

C1145, C1146 Yaw rate/side/decel g sensor

C1155 BR Fluid level low

C1164, C1165, C1166, C1167 CV/SV System

U1000 CAN Comm circuit

U1002 System comm (CAN)

Parking brake switch

VDC OFF Switch

ABS Warning lamp

Brake warning lamp

VDC OFF Indicator lamp

Slip indicator lamp

VDC/TCS/ABS

Excessive ABS Function operation frequency

Unexpected pedal reaction

The braking distance is long

Pedal vibration or ABS operation sound occurs

Vehicle jerks during VDC/TCS/ABS control

Wheel sensor

Sensor rotor

ABS Actuator and electric unit (control unit)