Mitsubishi Colt Ralliart. Manual — part 216
AC000871AE
When engine
is stopped
When engine
is started
ON-VEHICLE SERVICE
BASIC BRAKE SYSTEM
35A-10
(2) With the engine stopped, step on the brake
pedal several times. Then step on the brake
pedal and start the engine. If the pedal moves
downward slightly, the booster is in good
condition. If there is no change, the booster is
defective. Go to step 3.
AC000872
Good
No good
AE
(3) With the engine running, step on the brake
pedal and then stop the engine. Hold the
pedal depressed for 30 seconds. If the pedal
height does not change, the booster is in good
condition, if the pedal rises, the booster is
defective.
2. If the above three tests are okay, the booster
performance can be determined as good. If one of
the above three tests is not okay, the check valve,
vacuum hose, or booster is defective. Check the
check valve (Refer to
), vacuum hose for
leaks, high volume engine vacuum applied to
booster. Repair or replace as necessary. If these
are okay, replace the booster and repeat this test
starting at Step 1.
CHECK VALVE OPERATION CHECK
M1351009000495
CAUTION
The check valve should not be removed from the
vacuum hose.
1. Remove the vacuum hose (Refer to
).
CAUTION
If the check valve is defective, replace it as an
assembly unit together with the vacuum hose.
AC314141AB
A
B
Engine side
(does not
hold)
Booster
side
(holds)
Vacuum hose
assembly
2. Check the operation of the check valve by using a
vacuum pump.
Vacuum pump
connection
Accept/reject criteria
Connection at the brake
booster side (A)
A negative pressure
(vacuum) is created and
held.
Connection at the intake
manifold side (B)
A negative pressure
(vacuum) is not created.
BLEEDING
M1351001400842
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.
Main
Index
Group
TOC
ON-VEHICLE SERVICE
BASIC BRAKE SYSTEM
35A-11
MASTER CYLINDER BLEEDING
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 mas-
ter cylinder).
1. Fill the reserve tank with brake fluid.
2. Keep the brake pedal depressed.
AC601749AB
Master cylinder
3. Have another person cover the master cylinder
outlet with a finger.
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
AC207973AC
MB991922
Reservoir assembly
1. Install the special tool brake fluid filling tool
(MB991922) as shown. Carry out air-bleeding
while brake fluid is being added.
AC102356
1
AF
4
3
2
2. Start the engine and bleed the air in the sequence
shown in the figure.
BRAKE FLUID LEVEL SENSOR CHECK
M1351009100663
AC509656
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".
DISC BRAKE PAD CHECK AND
REPLACEMENT <EXCEPT FOR
RALLIART VERSION-R>
M1351002300848
<FRONT>
NOTE:
AC000879
When new
When worn
AD
Pad
Wear indicator
Brake
disc
The brake pads have indicators that contact the
brake disc when the brake pad thickness becomes 2
mm, and emit a squealing sound to warn the driver.
Main
Index
Group
TOC
ON-VEHICLE SERVICE
BASIC BRAKE SYSTEM
35A-12
CAUTION
• Whenever a pad must be replaced, replace
both LH and RH wheel pads as a set to pre-
vent the vehicle from pulling to one side when
braking.
• If there is a significant difference in the thick-
ness of the pads on the left and right sides,
check the sliding condition of the piston and
slide pins.
AC403292 AB
<14-inch>
<15-inch>
1. Check the brake pad thickness through the caliper
body check port.
Standard value: 10.0 mm
Minimum limit: 2.0 mm
AC403291AB
<14-inch>
<15-inch>
Guide pin
Slide pin
bolt (sub)
2. Remove the guide pin or slide pin bolt (sub).Pivot
the caliper assembly and hold it with wires.
AC602357AB
1
4
3
5
1
5
1
1
4
2
5
5
<14-inch>
<15-inch>
3. Remove the following parts from caliper
assembly.
(1) Shim
(2) Outer pad <14-inch>
(3) Pad assembly <15-inch>
(4) Pad assembly <RH> or Pad and wear
indicator assembly <LH>
Main
Index
Group
TOC
ON-VEHICLE SERVICE
BASIC BRAKE SYSTEM
35A-13
(5) Pad clip
4. In order to measure the brake drag force after pad
installation, measure the rotary-sliding resistance
of the hub with the pads removed <Refer to
(15-inch)>.
5. Install the pads and caliper assembly, and then
check the brake drag force <Refer to
(14-inch) or
(15-inch)>.
<Rear>
AC402247AB
1. Visually check the thickness of brake pad from the
inspection hole of the caliper body.
Standard value: 9.5 mm
Limit value: 2.0 mm
2. When the thickness is lower than the limit value,
replace the both brake pads (right and left) as a
set.
3. Disengage the connection between the rear brake
caliper and rear parking brake cable.
AC402247AC
4. Remove the bolt, and swivel the caliper assembly
upward to retain with a wire or other similar
material.
AC402334
AB
1
2
3
4
1
4
5. Remove the following parts from the caliper
assembly.
(1) Shim
(2) Outer pad
(3) Pad assembly <RH> or Pad and wear
indicator assembly <LH>
(4) Pad clip
6. In order to measure the brake drag force after pad
installation, measure the hub sliding torque with
no pad attached (Refer to
CAUTION
Keep grease or other fouling off the pad and
brake disc friction surface.
AC402607AB
MB990652
7. Clean the piston, and press the piston into the
cylinder using the special tool, rear disc brake
piston driver (MB990652).
Main
Index
Group
TOC
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