David106

pscan.uk wrote:

David106 wrote: wrote:

Message Init fail - Is this the expected behaviour?

This is consistent with three scenarios.
1. MEMS2J ECU not powered and so not communicating.
2. MEMS2J ECU powered but damaged, so not communicating.
3. pscan damaged. However this is not likely. pscan has sent a pulse onto the K line and detected the pulse (if it did not, then it would say K line fault). Also pscan working on the Golf. Therefore pscan is not damaged.

I've made some good progress today.I tested the old MEMS2J ECU - just to get familiar with the whole thing again - and the expected "Init fail" message was displayed.I then tested the new one and it worked perfectly, it connected successfully at the first attempt!


So, from the three possible scenarios above, it seems clear that the old MEMS2J is dead.

My concern now is that there might be something in the car that damaged the ECU, which would damage the new one as well if I just plugged it in.

For context, the car was running perfectly when we decided to strip it down to paint it and change some rusty parts. After assembling it back it never ever turned on again. Might it be that there is some cable wrongly connected that would have damaged the old ECU? Any advice as to where to start looking? or would you just install the new ECU and try?

Any advice is more than welcome

Thanks!