Proportioning Valve Function Test - Mitsubishi MOTORS Space Runner 1999 Workshop Manual Supplement

BASIC BRAKE SYSTEMS –
Valve Spring
A
Booster
side
Pressure gauge
Proportioning valve
Split point
Output
pressure
Input pressure
2. Check the operation of the check valve by using a vacuum
B
Intake
manifold
side

PROPORTIONING VALVE FUNCTION TEST

1. Connect two pressure gauges, one each to the input side
2. Bleed the air in the brake line and the pressure gauge.
3. While gradually depressing the brake pedal, make the
On-vehicle Service
pump.
Vacuum pump connection
Connection at the brake
booster side (A)
Connection at the intake
manifold side (B)
Caution
If the check valve is defective, replace it as an assembly
unit together with the vacuum hose.
and output side of the proportioning valve, as shown.
following measurements and check to be sure that the
measured values are within the allowable range.
(1) Output pressure begins to drop relative to input
pressure (split point).
Standard value: 2.45 MPa
(2) Check to be sure that the output fluid pressure is
at the standard value when the pedal depression force
is increased so that the input fluid pressure is at the
values shown in the table below.
Standard value:
Items
Output fluid pressure
(Input fluid pressure)
35A-9
Accept/reject criteria
A negative pressure (vacu-
um) is created and held.
A negative pressure (vacu-
um) is not created.
35100110219
Specifications
4.30 0.4
(9.81)
MPa