|
The energy is stored in the battery and once the cables are disconnected the cables are as dead as the legendary DoDo.
Your troubleshooting should now be centred on the wiring and connectors between the O2 sensors and the ECU. Also a factory electrical circuit is handy as it will show if any other devices are on the O2 circuits to the D/A ECU driver.
I would get a engine emission circuit and check if other engine management sensors share the O2 circuits control voltage if any, and if they do consider replacing these and checking these circuits for continuity.
Lastly it is possible the ECU has a faulty driver on the O2 driver on its circuit board but its replacement should only be considered after thorough troubleshooting as described.
|