Last week I borrowed an OBD2 scanner from my friend Anthony at work hoping it could shed more light on where exactly the problem lies. Unfortunately, I discovered that the OBD2 scanner does not diagnose ABS brake faults. I did a little research and found out how to retrieve the code(s) the manual way. It involves accessing the Data Link Connector or Diagnosis Port located in the engine compartment in between the firewall and front strut on the driver side. Using a fused jumper wire, you ground the below indicated pin [x].
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[ ] [x] [ ] [ ] [ ] [ ]
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Once grounded, turn the key switch to the ON position and watch the ABS light for the flashing sequence. The light should turn on for a few seconds and then start flashing. The first sequence of flashes are slow and refer to the first digit of the two digit code. The second sequence of flashes are fast and refers to the second digit of the two digit code.
If there is more than one fault code, there is a pause in between each fault code reported. The sequence will repeat itself as long as the key switch is ON and the jumper wire is connected. Below is the wiring diagram for the data link connector.
If you own or have access to a sevice manual, you can look up the DTC codes for a problem description and troubleshooting guide. Here is a link to one of many sites for downloading a Mazda Protege Service Manual.
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