Brake System - General Information
DIAGNOSIS AND TESTING
evidence of a brake concern. Check for the brake
warning indicator illumination and the fluid level in
the master cylinder reservoir.
Normal Conditions
The following conditions are considered normal
and are not indications that the brake master
cylinder is in need of service.
- Modern brake systems are not designed to
produce as hard a pedal effort as in the past.
Complaints of light pedal efforts should be
compared to pedal efforts of another vehicle, of
the same model and year.
- During normal operation of the brake the fluid
level in the reservoir will rise during brake
application and fall during release. The net fluid
level
(i.e., after brake application and release)
will remain unchanged.
- A trace of brake fluid will exists on the brake
booster shell below the master cylinder
mounting flange. This results from the normal
lubricating action of the master cylinder bore
end seal.
- The fluid level will fall with brake shoe and lining
wear.
Abnormal Conditions
N0TE:Prior to performing any diagnosis, make
sure the brake system warning indicator is
functional.
Changes in brake pedal feel or travel are indicators
that something could be wrong with the braking system. The diagnostic procedure and techniques
use brake pedal feel, warning indicator illumination
and low brake fluid level as indicators in diagnosing
braking system concerns. The following conditions
are considered abnormal and indicate that the
brake master cylinder is in need of service.
- The brake pedal effort is excessive. This may
be caused by a bind or obstruction in the pedal
.
or linkage, clogged fluid control valve or ( ' insufficient booster vacuum.
- The rear brakes lock up during light pedal force.
This may be caused by incorrect tire pressures,
grease or fluid on the brake shoes and linings,
damaged brake shoes and linings, incorrectly
adjusted parking brake, or damaged or
contaminated brake pressure control valves.
- The brake pedal effort is erratic. This condition
could be caused by a brake booster malfunction,
extreme caliper piston knock back or incorrectly
installed brake shoes and linings.
- The brake warning indicator is ON. This may
be caused by low fluid level, ignition wire routing
too close to the fluid level indicator assembly,
or float assembly damage.
Bypass Condition Test
1. Check the fluid in brake master cylinder. Fill the
brake master cylinder reservoir if low or empty.
2. Observe the fluid level in the brake master
cylinder reservoir. If after several brake
applications, the fluid level remains the same,
measure the wheel turning torque required to
rotate the wheels with the brakes applied as
follows:
Place the transaxle in NEUTRAL and raise and
support the vehicle. REFER to: (1 00-02 Jacking
and Lifting)
Jacking (Description and Operation),
Lifting (Description and Operation).
Apply the brakes with a minimum of 445 N (100
Ib) and hold for approximately 15 seconds. With
the brakes still applied, exert a torque on the front
wheels of 10.1 Nm (75
1b.R). If either wheel rotates,
install a new brake master cylinder. REFER to:
(206-06 Hydraulic Brake Actuation)
- The brake pedal goes down fast. This could be Brake Master Cylinder - RHD (Removal and
caused by an external or internal leak. Installation),
- The brake
pedal eases down slowly. This could Brake Master Cylinder - LHD
(Removal and
be caused by an external or internal leak. Installation).
- The
brake pedal is low and or feels spongy. This
condition may be caused by no fluid in the brake
Non-Pressure Leaks master cylinder reservoir, reservoir cap vent
holes clogged or air in the hydraulic system.
Any empty brake master cylinder reservoir
condition may be caused by two types of
non-pressure external leaks.
2006.0 Fiesta 1212006
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206-05-1 1 Parking Brake and Actuation 206-05-1 1
GENERAL PROCEDURES
Parking Brake Cable Adjustment - Vehicles With: Rear Disc
1. Remove the parking brake control trim panel. Stage 5: Depress the brake pedal firmly 15
times.
6. Release the parking brake.
7. Raise and support the vehicle. For additional
information, refer to: (1
00-02 Jacking and
Lifting)
Jacking (Description and Operation),
Lifting (Description and Operation).
8. N0TE:Make sure that the parking brake
control is fully released.
Adjust the parking brake cable in
2 stages.
Stage 1 : With the aid of another technician,
tighten the parking brake cable adjustment
2.
Loosen the parking brake cable adjustment nut until both the parking brake actuating
nut to the end of the thread. levers start to move (left-hand parking brake
Discard the retaining clip. actuating lever
shown). Stage 2: Tighten the parking brake cable
adjustment nut until the total movement
between both the parking brake actuating
levers and the stops, when added together,
is between 0.5 mm and 2.0 mm (left-hand
parking brake actuating lever shown).
3. Release the parking brake.
4. Make sure that the parking brake cable is
correctly located.
5. N0TE:Prior to carrying out adjustment to a
new or relocated parking brake cable, settle
the parking brake system.
9. Check the parking brake cable adjustment
Settle the parking brake system in
5 stages.
Stage 1 : Raise the parking brake control 4
notches.
Stage 2: Tighten the parking brake cable
adjustment nut until increased torque is
detected.
Stage 3: Operate the parking brake control
firmly
10 times.
Stage 4: Loosen the parking brake cable
adjustment nut to the end of the thread.
in 2 stages.
Stage 1 : Raise and release the parking brake
control and check that it returns to the fully
released position. If the parking brake control
does not fully release, repeat the adjustment
procedure.
Stage 2: Rotate the rear wheels and check
for brake drag. If brake drag is felt, loosen
the parking brake cable adjustment nut 2 full
turns and repeat the adjustment procedure.
10. Lower the vehicle.
2006.0 Fiesta 1212006 G458899en
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206-05-1 3 Parking Brake and Actuation 206-05-1 3
REMOVAL AND INSTALLATION
Parking Brake Cable - Vehicles With: Rear Drum
Brakes(l2 675 0)
I Lubricant I ESE-M99B144-B I
5. Disconnect the parking brake cable on both
Removal
Materials
I. Release the parking brake. sides.
2. Raise and support the vehicle. For additional
information, refer to: (100-02 Jacking and
Lifting) Name
Specification
Jacking (Description and Operation),
Lifting (Description and Operation).
3m ~CAUTION:T~~~ care when removing the 6, Detach the parking brake cable from the exhaust hanger insulators to prevent
damage. beam
axle on both sides.
Detach the exhaust rear muffler from the
exhaust hanger insulators.
4. Detach the center section of the exhaust
system heat shield from the floor panel. 7.
Detach the parking brake cables from the
parking brake cable equalizer. 1. Detach the parking brake cables from the
parking brake cable support bracket.
2. Detach the parking brake cables from the
parking brake cable equalizer.
2006.0 Fiesta 1212006 G89185en
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206-05-1 5 Parking Brake and Actuation 206-05-1 5
REMOVAL AND INSTALLATION
Parking Brake Cable - Vehicles With: Rear Disc Brakes(l2 675 0)
Removal
I. Release the parking brake.
2. Raise and support the vehicle. For additional
information, refer to:
(1 00-02 Jacking and
Lifting)
Jacking (Description and Operation),
Lifting (Description and Operation).
3. Remove the floor panel crossmember.
4m ACAUTION:T~~~ care when removing the
exhaust hanger insulators to prevent
damage.
N0TE:Support the rear muffler.
Detach the rear muffler from the exhaust
hanger insulators.
5. Detach the center section of the exhaust
system heat shield from the floor pan.
6. Detach the parking brake cable from the
brake caliper on both sides.
I. Pull back the parking brake actuating lever.
2. Disconnect the parking brake cable from the
parking brake actuating lever.
3. Detach the parking brake cable from the
brake caliper bracket.
ACAUTION:DO not apply excessive force
when releasing the parking brake cable clip
locking tangs from the parking brake cable
clip support bracket. Failure to follow this
instruction may result in damage to the clip.
N0TE:The parking brake cable clip is secured to
the parking brake cable support bracket by a
locking tang on either side of the clip.
Detach the parking brake cable from the
beam axle on both sides.
2006.0 Fiesta 1212006 G458900en
procarmanuals.com
206-09A-9 Anti-Lock Control 206-09A-9
REMOVAL AND INSTALLATION
6. Disconnect the anti-lock brake system (ABS)
module electrical connector.
11. Detach the HCU and ABS module assembly
from the support bracket.
5. Detach the brake tubes from the bulkhead. 10. Remove the HCU and ABS module
7. Raise and support the vehicle. For additional
information, refer to Section
100-02 [Jacking 12. Remove the HCU to ABS module retaining
and Lifting]. bolts.
/
8. Remove the HCU and ABS module support
bracket lower retaining bolt. assembly
and the support bracket.
9. Lower the vehicle.
13. Remove the HCU.
Installation
1. To install, reverse the removal procedure.
2006.0 Fiesta 1212006 GI 83774en
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206-09A-I 2 Anti-Lock Control 206-0949-12
REMOVAL AND INSTALLATION
Aplug the HCU ports to prevent fluid loss
or dirt ingress.
N0TE:Make a note of the position of the brake
tubes to aid installation.
Disconnect the brake tubes from the HCU.
Detach the brake tubes from the bulkhead.
7m &AUTION:C~~ the anti-lock brake system
(ABS) module electrical connector and
socket to prevent dirt and fluid ingress.
Disconnect the ABS module electrical
connector.
I. Depress the locking tangs.
2. Release the retainer.
8.
Raise and support the vehicle. For additional
information, refer to: (100-02 Jacking and
Lifting)
Jacking (Description and Operation),
Lifting (Description and Operation).
9. Remove the HCU and ABS module support
bracket lower retaining bolt.
f
10. Lower the vehicle.
11. Remove the HCU and ABS module
assembly and the support bracket.
12. Detach the HCU and ABS module assembly
from the support bracket.
2006.0 Fiesta 1212006 ~406271 en
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206-09A-I 5 Anti-Lock Control 206-09A-15
REMOVAL AND INSTALLATION
5. Detach the brake tubes from the bulkhead. 10. Remove the HCU and ABS module
assembly and the support bracket.
6. Disconnect the anti-lock brake system (ABS)
module electrical connector.
11. Detach the HCU and ABS module assembly
from the support bracket.
7. Raise and support the vehicle. For additional
information, refer to Section
100-02 [Jacking 12. Remove the HCU to ABS module retaining
and Lifting]. bolts.
8. Remove the HCU and ABS module support
bracket lower retaining bolt.
I 9. Lower the vehicle.
13. Remove the ABS module.
Installation
I. To install, reverse the removal procedure.
2006.0 Fiesta 1212006 G327317en
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206-09A-I 8 Anti-Lock Control 206-09A-18
REMOVAL AND INSTALLATION
9. Remove the HCU and ABS module support hap the brake tubes to prevent fluid loss bracket lower retaining or dirt ingress. /-
Aplug the HCU ports to prevent fluid loss
or dirt ingress.
N0TE:Make a note of the position of the brake
tubes to aid installation.
Disconnect the brake tubes from the HCU.
Detach the brake tubes from the bulkhead.
7m &AUTION:C~~ the anti-lock brake system
(ABS) module electrical connector and
socket to prevent dirt and fluid ingress.
Disconnect the ABS module electrical
connector.
1. Depress the locking tangs.
2. Release the retainer.
8. Raise and support the vehicle. For additional
information, refer to: (100-02 Jacking and
Lifting)
Jacking (Description and Operation),
Lifting (Description and Operation). 10.
Lower the vehicle.
11. Remove the HCU and ABS module
assembly and the support bracket.
12. Detach the HCU and ABS module assembly
from the support bracket.
2006.0 Fiesta 12/2006 G406272en
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