Rear brake pressure regulator (Mitsubishi Matrix)

Determines the pressure in the brake circuits of the front and rear axles to achieve maximum braking efficiency and prevent rear wheel lockup. The valve cannot be disassembled, since very fine adjustment will be required later.

Checking functionality

Disconnect the brake pipes from the master cylinder.

In place of the tubes, connect one pressure gauge to the inlet of the proportional valve, and the second to the outlet.

Note: After installing the pressure gauges, bleed the brake system.

Press the brake pedal and measure the current pressure at the input and output of the proportional valve. If the pressure value corresponds to that shown in Figure 6.40, then the valve is in good condition.

Reconnect the brake pipes and bleed the brake system.

Note: The characteristic of the proportional valve is given for the case of increasing pressure (Fig. 6.40).

Installing the rear brake pressure regulator

Install the master cylinder as shown in Figure 6.41.

Tighten the brake pipe mounting nuts and bleed the brake system.

Tightening torque of brake pipe nut: 13–17 N·m, proportional valve nut: 35–55 N·m.