Brake Pressure Modulator Valve

Modulator Unit Removal/Installation:

Modulator Unit Installation/Assembly:

WARNING: Before removing the modulator-to-pump high-pressure line, be sure to relieve the fluid pressure via the maintenance bleeder, refer to System Service / Relieving Accumulator/Line Pressure.

CAUTION:
^ Be careful not to bend or damage the brake pipes when removing the modulator unit.
^ Do not spill brake fluid on the car; it may damage the paint; if brake fluid does contact the paint, wash it off immediately with water.
^ To prevent spills, cover the hose joints with rags or shop towels.
^ Before reassembling, check that all parts are free of dust and other foreign particles.
^ Do not mix different brands of brake fluid as they may not be compatible.
^ Do not reuse the drained fluid. Use only clean DOT 3 or 4 brake fluid.
^ When connecting the brake pipes, make sure that there is no interference between the brake pipes and other parts.
^ Do not disassemble the modulator unit. Replace the modulator unit as an assembly if it is defective.
^ Do not disassemble the pump (except pressure switch).


1. Drain the brake fluid from the master cylinder, refer to Brakes and Traction Control/Brakes/Service and Repair.
2. Relieve the high pressure fluid, refer to System Service / Relieving Accumulator/Line Pressure. Disconnect the high pressure hose.
3. Remove the intake air duct.
4. Disconnect the solenoid, pump motor and pressure switch connectors.
5. Disconnect the six brake pipes from the modulator unit.
6. Loosen the two lower mounting bolts, and remove the upper mounting bolt and the modulator unit from the frame.
7. Install the modulator unit in the reverse order of removal.
8. After installation, fill and bleed the hydraulic system, refer to Brakes and Traction Control/Brakes/Antilock Brake System/Service and Repair.