IPA Tools 9008-SE Super MUTT Standard Edition - Manual (Page 14)

14
The diagnostic chart (Pg. 15) references some of the ABS codes and the method for
releasing them from the CPU utilizing the SUPER MUTT ® ’s Auxiliary circuit.
BLINK CODE DIAGNOSTICS
The Meritor WABCO Enhanced Easy-Stop Trailer ABS ECU detects any electrical fault
in the trailer ABS. Each of the faults has a code. When a fault occurs, the ECU stores
the code for that fault in the memory.
There are two kinds of faults: active and stored. Active faults are those currently existing
in the system, such as a broken wire. Stored faults are faults that have occurred but do
not presently exist. Active faults can be cleared only after repairs are completed.
The ECU signals a malfunction by lighting both the internal and external indicator lamp
when a fault exists. The external ABS indicator lamp is usually mounted on the left rear
of the trailer, near the rear wheels.
There are two ways to obtain blink codes:
» Ignition Power Activation (recommended method)
» Diagnostic Tool
Although the ECU can store multiple faults in its memory, it only displays one blink code
at a time. This is why it is important to re-check the blink codes after repairing a fault.
lf there are additional codes in the memory, they only blink after you have repaired the
first fault.
IGNITION POWER ACTIVATION
Ignition Power Activation is the process of interrupting the power on the blue wire by
some other means (Auxilary Circuit) to display blink codes on the trailer ABS indicator
lamp located on the side of the trailer. This method is for constant power vehicles only.
To obtain blink codes using ignition power activation, perform the following procedure:
1. Activate Auxilary Circuit for no longer than 5 seconds. The ABS indicator lamp will
be on.
2. Turn the Auxilary Circuit off. The ABS indicator lamp will go out.
3. Turn the Auxilary Circuit on. The ABS indicator lamp will then come on, then go out.
4. The blink code will be displayed three times by the ABS indicator lamp on the trailer.