Ford Transit 2002 Owner's Manual page 136

Brake System - General Information -
Brake System
Diagnosis and Testing
General Equipment
Pressure/vacuum gauge set
The Ford approved diagnostic tool
The brake system operates by transferring effort applied to the brake pedal by the driver to
the brakes at each wheel.
The braking effort is distributed to each wheel, using a hydraulic system. The system is
assisted using a vacuum brake booster that reduces pedal effort and increases hydraulic
pressure.
The parking brake operates on the rear wheels and is applied using a hand operated
control.
Inspection and Verification
NOTE: Before carrying out any diagnosis, make sure that the brake system warning
indicator is functional.
1. 1. Verify the customer concern.
2. 2. Visually inspect for obvious signs of mechanical or electrical damage.
Visual Inspection Chart
Mechanical
Tire pressure(s)
Wheels and tires
Fluid leak(s)
Brake pipe(s)
3. 3. If an obvious cause for an observed or reported concern is found, correct the case
(if possible) before proceeding to the next step.
4. 4. If the cause if not visually evident, verify the symptom and refer to the Symptom
Chart.
Road Test
Carry out a road test to compare actual vehicle braking performance with the performance
standards expected by the driver. The ability of the test driver to make valid comparisons
and detect performance deficiencies will depend on experience.
The driver should have a thorough knowledge of the brake system operation and accepted
general performance guidelines to make good comparisons and detect performance
concerns.
An experienced technician will always establish a route that will be used for all brake
diagnosis road tests. The road selected will be reasonably smooth and level. Gravel or
bumpy roads are not suitable because the surface does not allow the tires to grip the road
equally. Crowned roads should be avoided because of the large amount of weight shifted to
the low set of wheels on this type of road. Once the route is established and consistently
used, the road surface variable can be eliminated from the test results.
Before a road test, get a complete description of the customer concerns or suspected
condition. From the description, the technician will be able to match possible causes with
Transit/Tourneo Connect 2002.5 (06/2002-)
Electrical connector(s)
http://vnx.su
Electrical
Wiring harness(s)
Switch(es)
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