[Микола]

На одном из буржуйских форумах у мужика схожая проблема - нет диагностики. Тож все по кругу советовали менять в итоге он решил проблему и его отписка:

Finally, the case has been solved. Due to your supportive feedback the assumption has been confirmed that the PCM was faulty. Fortunately, I found an electrical mechanic who could spot and repair the problem, so actually there was no need to buy a new PCM. It was a tiny IC in the PCM that busted. The most unambiguous indication pointing to the PCM’s fault was that the self-diagnostic test (ignition on-off-on-off-on) could not be carried out because the check engine light did not flash, and the yellow engine symbol did not appear either.

Пошел я ковырять силикон с платы дальше.