Bendix Commercial Vehicle Systems A-18 TRAILER ABS 5/04 - Manual (Page 22)

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End-Of-Line Diagnostics
Automatic System Configuration:
The Bendix ® A-18 ™ trailer ABS system automatically
configures itself to any valid ABS system installed on the
trailer. The automatic configuration process occurs each
time the system receives power at the permanent power
input. In most cases this ECU input is connected to the
SAE J560 connector AUX connection. During the automatic
configuration process, the ECU will only configure upwards.
That is, it will add but not subtract components from its
configuration.
The configuration can be checked by using the hand held
diagnostic tool or by activating the blink code as described
in the “End-of-Line Checkout Procedure” listed below.
Compare the two part blink code with the chart. Part 1 of
the blink code is the current system configuration.
Use of Hand Held Tool for Configuration
The system always configures upwards depending on the
components which are found connected to it. If a lower
configuration is desired, a hand held tester must be used
to reconfigure the system.
End-of-Line Checkout Procedure (Standard):
Note: For 2S/1M systems, it is not possible to miswire
the components. Therefore it is only necessary to perform
step 6 of the end-of-line checkout.
1. Apply power to ECU (do not use a battery charger as a
power source).
2. Remove the weather cap from the trailer
diagnostic port.
3. Connect either a hand-held tester with a Bendix
Diagnostic Card or a PC Based Diagnostic system with
ServiceRanger’s End-of-Line Software Package to the
trailer diagnostic port.
4. Follow the appropriate menu selections to verify:
a. That the sensors and valves are connected in their
proper locations.
b. That the proper system configuration has been
obtained.
c. That there are no faults. If necessary, clear historic
faults.
5. After completion of the End-of-Line checkout procedure,
disconnect the tool or PC from the trailer diagnostic
port.
6. Verify that the ABS warning light turns off and remains
off after the bulb test. If there was a past speed sensor
fault in the system, the warning light will not turn off
until the trailer has been operated at a speed sufficiently
high to be read at the ECU, typically 3 to 5 mph.
End-of-Line Checkout Procedure (Basic):
Note: It is not possible to miswire the components on a
2S/1M (Basic) system. Therefore, the checkout procedure
does not require the use of a hand-held tester.
1. Apply power to ECU (do not use a battery charger as a
power source).
2. Verify that the ABS warning light turns OFF and remains
OFF after the bulb test.
Note: If there was a past speed sensor fault in the
system, the warning light will not turn OFF until the trailer
has been operated at a speed sufficiently high to be read
at the ECU, typically 3 to 5 mph.