Technical information

■
■
19
Technician Guidelines for Antilock Braking Systems
■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■
Step 7: Clear fault codes.
Clear any codes stored in the ECU identifying the problem.
Step 8: Implement any possible preventive measures.
Review the vehicle maintenance schedule for required
service intervals and perform necessary maintenance. Check
for other areas of apparent concern and notify the fleet
manager—or fix—prior to release of vehicle.
2. Notes on Electrical/Electronic Connections
The following section contains general service information
that should be considered if electrical/electronic connections
need repair during ABS servicing.
a. Wiring Termination Techniques
Termination is the process of either ending a wire or
attaching a device to be used at the end of a wire. Wiring
terminations are made in a variety of ways. Wires can be
terminated with butt splices, the application of a terminal, and
by simply “tinning” or sealing the wire’s end.
The primary considerations during a termination are
mechanical strength, vibration resistance, electrical integrity,
and environmental protection.
• Mechanical Strength—Whenever a wire is terminated,
the mechanical strength of the termination should
meet or exceed the mechanical strength of the
conductor without the termination.
• Vibration Protection—Always place conductors back in
any holding device that they were in prior to the
modification/repair or attach the conductors to the
vehicle in a manner which will prevent the conductor
from vibrating during operation.
• Electrical Integrity—The termination must be able to
fulfill the electrical needs of the circuit (for example,
current-carrying capability, minimal voltage drop).
Whenever a termination or splice is made in a
conductor, an inherent voltage drop will be present.
Special connectors are available to minimize the
voltage drop, but these connectors normally are cost
prohibitive. Terminations made carefully normally
provide an acceptable voltage drop.