Wednesday, January 5, 2022

Meritor WABCO MM-0180 Trailer 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.

Meritor Wabco Toolbox 13+ECAS CAN2 V3.00 Download & Installation

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. Stored faults can only be diagnosed with TOOLBOX Software or the Pro-Link 9000.
 

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
NOTE: In previous versions of Easy-Stop, the blink code tool and the ABS indicator lamp would flash the blink code at the same time. With Enhanced Easy-Stop, this does not happen. The codes are displayed one blink at a time, first on the trailer ABS lamp, then on the blink code 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 recheck the blink
codes after repairing a fault. If there are additional codes in the memory, they only blink after you have repaired the first fault.
 

Stored faults, clear all and end of line test modes are available with the TOOLBOX Software or the Pro-Link 9000.
 

Ignition Power Activation
Ignition Power Activation is the process of using the vehicle’s ignition switch (or interrupting the power on the blue wire by some other means) 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. Turn the ignition switch on for no longer than 5 seconds. The ABS indicator lamp will
be on.
2. Turn the ignition switch off. The ABS indicator lamp will go out.
3. Turn the ignition switch 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.
NOTE: For ignition power activation, power is provided by the ignition switch.

https://www.car-auto-repair.com/meritor-wabco-toolbox-diagnostic-software-download/

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