Load-Sensing Proportioning & By-Pass Valve (LSP/BV) Test

For testing purposes, rear axle is loaded to a specified weight. This specified weight may be added to vehicle and may or may not include rear vehicle weight.
See LSP & BV REAR AXLE TEST WEIGHT . Attach Pressure Gauge Set (09709-29017) to front caliper and rear wheel cylinder or caliper. Bleed system.
On Camry with ABS or 2VZ-FE engine without ABS, depress brake pedal until front pressure reading reaches 1422 psi (100 kg/cm² ).
On all other Camry models, depress brake pedal until front pressure reading reaches 1138 psi (80 kg/cm² ).
On all models, wait 2 seconds and record pressure reading from gauge connected to rear wheel cylinder or caliper. Compare recorded pressure with specified brake pressure. See REAR BRAKE PRESSURES .

Adjust fluid pressure by changing length of No. 2 shackle (if necessary). See Fig 1.

LSP & BV REAR AXLE TEST WEIGHT

Application

Lbs. (Kg.)

Camry

⁽¹⁾ 220 (100)

⁽¹⁾	Add this amount to rear of vehicle.

NOTE: DO NOT depress brake pedal more than once or release pedal while setting pressure on front gauge.

REAR BRAKE PRESSURES

Application

Rear Gauge psi (kg/cm² )

Camry ⁽¹⁾

With ABS

937-1122 (65.9-78.9)

V6 Without ABS

906-1091 (63.7-76.7)

4-Cylinder Without ABS ⁽²⁾

583-768 (41-54)

⁽¹⁾	Rear brake pressure given is with front brake pressure set at 1422 psi (100 kg/cm² ).

⁽²⁾	Rear brake pressure given is with front brake pressure set at 1138 psi (80 kg/cm² ).

On Camry vehicles with 2VZ-EF engine, standard spring length is 6.57" (166.9 mm) and 6.60" (167.6 mm) on all others. Measure distance "A". See Fig 1. Shorten spring length to increase pressure (if necessary). Reverse procedure to decrease pressure.
If correct pressure cannot be obtained by manipulating spring length, raise valve body to increase pressure or lower valve body to decrease pressure. If correct pressure still cannot be attained, replace valve body.

Fig 1: Measuring No. 2 Shackle Length & Spring Length

Fig 2: Exploded View of LSP & BP Valves

NOTE: Location and number of anti-rattle springs, anti-squeal shims, pad support and guide plates varies between models. Note component locations during removal process for reassembly reference.