Dual Proportioning Valve Inspection

WARNING: This page is about a different car, the 2007 Mazda MX-5 Miata. However, it is still accessible from the selected car via links, so may be relevant.

Connect the SSTs to the brake pipes as shown in Fig 1 .
Bleed the air from the brake system and the SSTs . (Bleed the air from the SSTs through air bleeding valve A.)

Fig 1: Identifying Special Tools
Courtesy of MAZDA MOTORS CORP.

Measure the fluid pressure of the master cylinder and the rear brake.

If not within the specification, replace the dual proportioning valve.

Fig 2: Dual Proportioning Valve Fluid Pressure Graph

Courtesy of MAZDA MOTORS CORP.

DUAL PROPORTIONING VALVE FLUID PRESSURE SPECIFICATIONS

MASTER CYLINDER PRESSURE (kPa {kgf/cm² , psi})	REAR BRAKE PRESSURE (kPa {kgf/cm² , psi})
A: 3,430 {34.98, 497.5}	A': 3,130 {31.92, 453.9} - 3,730 {38.04, 540.9}
B: 5,880 {59.96, 852.8}	B': 4,010 {40.9, 581.7} - 4,810 {49.05, 697.6}