I think I’ve gone as far as I can go with the ECU. I’ve looked how that TLE4226G can be tested and whilst that is easy enough, it would be time consuming only to possibly find that it is sound and then you move into the next likely culprit. The board has many vias (for via read rabbit hole as you do not know where they can pop up).CitroJim wrote: 05 Feb 2026, 05:17 Hope you can sort this Roger. I admire your happiness to dive deep into the ECU to try to resolve thisYou may be overthinking it though and your hunch of an intermittent winding is most likely the cause...
Those little solenoids can measure Ok when de-energised and then fail after being energised for a while before appearing to return to normal when they've had a bit of a rest.
And may iDH owners UNTIE!!!
To test properly, I am guessing that you have to know what the inputs and signals need to be on what pins to emulate an engine idling. You could then theoretically plug in a Lexia on a bench and read it as though it were an idling engine.
Then there would the question of being able to read, interpret, modify and/or verify any HEX code which may have been previously written to the ECU by someone who may have wanted the immo switching off or even the 3rd piston deactivation solenoid disabling.
Just about anyway …
tangent thrown ….the head has gone back on today ….jeez I had to extend my torque wrench with an axle stand tube just to get the necessary leverage to manage the angle torques ….done ….
