Hydraulic Assembly: Service and Repair

Pull up the relay box with harness attached and inserting a hand under the relay box, remove the brake tube using the flare nut wrench.

Hydraulic Unit (HU) Removal
Remove the hydraulic unit together with the bracket from the wheel house.

Caution:
1. The HU is heavy. Use care when removing it.
2. The HU cannot be disassembled. Never loosen its nuts or bolts.
3. Do not drop or shock the HU.
4. Do not turn the HU upside down or lay it on its side.

INSTALLATION

Installation Service Points
>A

Connect the grounding wire at the point shown in the illustration.

>B

Connect the tubes to the HU as shown in the illustration.
1. HU - front brake (L.H.)
2. HU - rear brake (R.H.)
3. HU - rear brake (L.H.)
4. HU - front brake (R.H.)
5. Master cylinder - HU (for left front and right rear)
6. Master cylinder - HU (for right front and left rear)


INSPECTION
Solenoid Valve Check

Measure resistance between terminals of each of the solenoid valves.

Hydraulic Unit Pump Motor Check

With the battery connected, confirm operating sound of the hydraulic unit pump motor.

Caution: Do not apply battery voltage for more than 1 second.