Posted by Matthew Yu on Thu, Mar 11, 2010 @ 03:38 PM
When it comes to VW and Audi vehicles measuring value blocks is equivalent to other models datastream monitoring. Measuring value blocks are real-time reportings of an ECU's current state. The values update continuously and you can monitor the behavior of your ECU while it operates. The data blocks are used to report information from factory sensors and other interpreted data. These data blocks can be accessed and logged. From the data gathered, graphs can be made and compared. This is very useful to track the progress of performance modifications to your car, or to help diagnose problems that may arise.
Each ECU reports one to ten values per data block and each ECU has one or more different blocks. Older vehicles might have only a few data blocks, but newer vehicles typically have tens, if not hundreds, of data blocks. Each data block is identified by a number between 0 and 255 inclusive. Some common blocks are:
- Basic Functions: Channel 000 to 009
- Ignition System: Channel 010 to 029
- Oxygen Sensor: Channel 030 to 049
- Speed Regulation: Channel 050 to 069
- Emission Reduction: Channel 070 to 079
- Readiness Code: Channel 086 to 089
You can access your measuring blocks using a diagnostic scan tool. Simply log the blocks that you are interested in, and start making graphs and comparisons. Below are the steps on how to measure your value blocks with screenshots from the AUTOBOSS V30 / PC Max:
1) Select "01-Engine"
2) Then choose "08-Read Measuring Value Block"
3) Then input the Channel you would like to measure and click "OK"
4) Then the values will show up and you can process and evaluate the work that you need to.
Whether you just need to scan for occasional codes, modify your long coding, or want to track performance and modifications being able to read these values makes performing your job that much easier!