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2. Check the operation of the check valve by using a vacuum pump.
Fig. 22: Checking Operation Of Check Valve By Using A Vacuum Pump
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
CAUTION: If the check valve is defective, replace it as an
assembly unit together with the vacuum hose.
2004 Mitsubishi Endeavor LS
2004 BRAKES Basic Brake System - Endeavor
Page 738 of 3870
Fig. 23: Vacuum Pump Specification
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
PROPORTIONING VALVE FUNCTION TEST < Vehicles without ABS> 1. Connect two pressure gauges to the output port of the master cylinder and
output port of the proportioning valve.
CAUTION: The proportioning valves are installed independently
for the right and left brake lines. Always measure
each valve.
2004 Mitsubishi Endeavor LS
2004 BRAKES Basic Brake System - Endeavor
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Fig. 24: Connecting Pressure Gauges To Output Port Of Master Cylinder And Proportioning Valve
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
2. Bleed the brake line and the pressure gauges (Refer to PROPORTIONING
VALVE FUNCTION TEST < Vehicles without ABS>
).
3. Depress the brake pedal gradually. Then check that the split point, where the
output fluid pressure begins to drop in proportion to the output fluid pressure,
is at the standard value.
Standard value: 3.19 - 3.67 MPa (463 - 532 psi)
4. Depress the brake pedal more strongly than at the above step. Then check that
the output fluid pressure is at the standard value when the input fluid pressure
is 7.35 MPa (1,066 psi).
Standard value: 4.17 - 4.66 MPa (605 - 676 psi)
5. Measure each out
put fluid
pressure at both valves
, and check that the
2004 Mitsubishi Endeavor LS
2004 BRAKES Basic Brake System - Endeavor
Page 740 of 3870
difference between the two is at the limit value or less.
Limit: 0.5 MPa (73 psi)
Fig. 25: Checking Split Point
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
6. If the measured pressure exceeds the limit, replace the proportioning valve.
BLEEDING MASTER CYLINDER BLEEDING
CAUTION: Use only brake fluid DOT 3 or DOT 4. Never mix the
specified brake fluid with other fluid as it will
influence the braking performance significantly.
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The master cylinder used has no check valve, so if bleeding is carried out by the
following procedure, bleeding of air from the brake pipeline will become easier.
(When brake fluid is not contained in the master cylinder).
1. Fill the reserve tank with brake fluid.
2. Keep the brake pedal depressed.
3. Have another person cover the master cylinder outlet with a finger.
Fig. 26: Identifying Master Cylinder Outlet
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
2004 Mitsubishi Endeavor LS
2004 BRAKES Basic Brake System - Endeavor
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4. With the outlet still closed, release the brake pedal.
5. Repeat steps 2 - 4 three or four times to fill the inside of the master cylinder
with brake fluid. BRAKE LINE BLEEDING Start the en
gine and bleed the air in the se
quence shown in the fi
gure.
2004 Mitsubishi Endeavor LS
2004 BRAKES Basic Brake System - Endeavor
Page 743 of 3870
Fig. 27: Identifying Brake Line Bleeding Sequence
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
BRAKE FLUID LEVEL SENSOR CHECK
2004 Mitsubishi Endeavor LS
2004 BRAKES Basic Brake System - Endeavor
Page 744 of 3870
The brake fluid level sensor is in good condition if there is no continuity when the
float surface is above "MIN" and if there is continuity when the float surface is
below "MIN".
Fig. 28: Checking Brake Fluid Level Sensor
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
DISC BRAKE PAD CHECK AND REPLACEMENT NOTE: The brake pads (LH wheel) have indicators that contact the
brake disc when the brake pad thickness becomes 2 mm
(0.08 inch), and emit a squealing sound to warn the driver.
2004 Mitsubishi Endeavor LS
2004 BRAKES Basic Brake System - Endeavor