Dual Proportioning Valve: Inspection

WARNING: This page is about a different car, the 2008 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION:

Carefully monitor brake fluid level at master cylinder.
Refill with new brake fluid. Refer to "RECOMMENDED FLUIDS AND LUBRICANTS ".
Be careful not to splash brake fluid on painted areas; it may cause paint damage. If brake fluid is splashed on paint areas, wash it away with water immediately.

Connect brake fluid pressure gauge to air bleeders of front and rear brakes on either LH and RH side.

Fig 1: Connecting Brake Fluid Pressure Gauge To Air Bleeders
Courtesy of NISSAN MOTOR CO., U.S.A.
Bleed air from the brake fluid pressure gauge.
Check fluid pressure by depressing brake pedal.
Applied pressure (Front brake): 7,355 kPa (75 kg/cm2, 1,067 psi)

Output pressure (Rear brake): 5,100 - 5,492 kPa (52 - 56 kg/cm2, 739 - 796 psi)

If output pressure is out of specification, replace dual proportioning valve.
Bleed air after disconnecting the brake fluid pressure gauge. Refer to "BLEEDING BRAKE SYSTEM .

Fig 2: Identifying Brake Fluid Pressure Gauge
Courtesy of NISSAN MOTOR CO., U.S.A.