Start with the relay - it is the easiest and cheapest item to replace. If you see an improvement, then you might have found the problem. Try swapping it out with a known good one if you have one, or swap it with another one on the board (like the one for the fog lamps). BMWs, it's relay number two, the white one, next to the fuel pump). One of the first steps I would take is to identify this relay (on E3. Even if the relay is intermittent, it might show up as the engine running rough, or stalling, or any other number of failures. It's not uncommon for the main relay to have its contacts become corroded and fail to work 1. Many people I have spoken to have had problems with the relay that controls the DME computer itself. If the code readers are having trouble connecting to the unit, then you need to look further. See the Pelican Technical Articles, Code Reading and OBD- II Diagnostics for more details. First, if you are having problems with your car, you should check to see if the computer is giving out any fault codes. In this tech article, we'll talk a little about the DME, how to troubleshoot its problems, prevent damage to the unit, and repair or replace the unit. The ECU (Electronic Control Unit) will cause the engine to run poorly or to stop running altogether if it becomes damaged. As such, it can be considered the brain of the car. Answer 1: The first thing to check if your refrigerator stops working completely is to make sure.īMW E3.
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