Morning all,

This came as a non runner. Codes for Inj circuit 1 and 2, DF99 and DF100. No activity on the Inj circuits. I checked all supplies and ground as well as all inputs. All ok. Ohmed and load tested inj wiring, ok. I opened the ECU and found a diode burned. Replaced the diode and all was ok. Started, ran well in the workshop. 60 seconds into the test drive it cut out. Exactly the same again, same damage in the ECU. I can´t see anything wrong with the wiring. Tests ok for shorts. Alternator output was tested and was ok.

Two questions please.
Is this a common problem and if so does anyone know the usual cause?
On this model, what are the usual loom trouble spots?