Bendix Commercial Vehicle Systems A-18 TRAILER ABS 5/04 - Manual (Page 30)

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Jump Pins A and E
and Release
To Access
Blink Codes
BASIC SYSTEM STANDARD SYSTEM
ABS
ECU
ABS
Wiring Harness
Jumper
Trailer
Frame
With ignition ON, jump the diagnostic
plug to chassis ground for 2 seconds
to activate the blink codes on the ABS
warning light.
FIGURE 36 - Jumper Method of Accessing Blink Codes
Fault Code Charts
Fault codes can be retrieved as two-digit blink codes. Refer
to Figures 37 and 38 for a description of these codes.
Blink codes are retrieved by jumping pins A and E on
Standard Systems and jumping the diagnostic bullet to the
frame on basic systems. The jumping method can also be
used to clear codes. To perform the activities listed below,
follow the steps exactly as given. If you make a mistake
during one of the steps, stop and start over at the beginning
of the procedure.
Note: When using the jumping method for a designated
amount of time to retrieve blink codes, use a method such
as counting—one thousand one, one thousand two. This
will allow more accurate fault code retrieval and reduce the
possibility of misreading blink code information.
Before attempting any repairs, first retrieve the fault codes
and write them down. Next, clear the fault codes. Then
once again retrieve the fault codes. Only active codes will
now be displayed.
Retrieving Fault Codes Live Feed
(Gen-5 ™ ABS PLC Capable ECUs)
1. Turn ignition key ON.
2. Use appropriate jumper method. Apply the jumper for
2 seconds and remove.
3. Record the 2-digit blink codes as they are flashed on
the external trailer warning lamp.
Retrieving Fault Codes (Gen-4 ™ ABS)
1. Turn ignition key ON.
2. Use appropriate jumper method. Apply the jumper for
2 seconds and remove.
3. Two-digit blink codes are retrieved and displayed.
Clearing Fault Codes
1. With the power OFF, use the appropriate jumping
method.
2. Turn the power ON while continuing to apply the jumper.
• Wait at least 3 seconds and remove the jumper.
• Blink fault codes are cleared.
• Repeat the “Retrieving Fault Codes” procedure to
verify that fault codes are cleared.
• Active fault codes will be re-established until
corrected action has been taken.