Hi,

I checked current ramps on all coils and it turns out no 2 cyl has no ramp! changed coils over from 1 to 2 and 2 to 1 and fault remained on no 2 cyl. Checked what I believe Toyota calls IGT signal and it is missing.
Question does this signal originate at the ECU? I have no tech data on this vehicle other than some info on a Yaris from James Dillon's Tech Topics where the ign set-up looks the same. Am I thinking right to check continuity of IGT wire back to ECU and if OK must have a ECU issue?

All help appreciated.

Mark