Hydraulic Control Assembly - Antilock Brakes: Service and Repair

REMOVAL AND INSTALLATION

NOTE:
ASC-ECU is located in the hydraulic unit.

CAUTION:
When the hydraulic unit (integrated with ASC-ECU) is replaced, after turning the ignition switch ON and OFF (vehicle information from ETACS-ECU is registered), always perform the calibration of steering wheel sensor, G and yaw rate sensor, brake fluid pressure sensor, cut valve, and inlet valve. (Refer to G and Yaw Rate Sensor Calibration, Testing and Inspection, Master Cylinder Brake Fluid Pressure Sensor Calibration, and Testing and Inspection.)













REMOVAL SERVICE POINTS

[[A]] ASC-ECU WIRING HARNESS CONNECTOR DISCONNECTION





Operate the lock lever as shown in the figure to disconnect the ASC-ECU wiring harness connector.

[[B]] HYDRAULIC UNIT (ASC-ECU) REMOVAL

CAUTION:

- Be careful when removing the hydraulic unit because it is heavy.
- Never loosen the nuts and the bolts because the hydraulic unit cannot be disassembled.
- Do not drop or shock the hydraulic unit.
- Do not turn the hydraulic unit upside down or lay down the unit because the inner air becomes difficult to be bled.

INSTALLATION SERVICE POINT

]]A[[ BRAKE TUBE CONNECTION





Install the brake pipe to the hydraulic unit as shown in the figure.
1. From master cylinder (primary)

2. To front brake (RH)

3. To front brake (LH)

4. From master cylinder (secondary)

5. To rear brake (RH)

6. To rear brake (LH)