2008 Yaris immobilizer issue?

[bathtub tom]

4 hours ago, brentstarburst said:

What's a multi meter?

If you don't know that, I think you may have to consult a mechanic.

I'd suggest you take off both the Battery terminals, give them a good clean (inside and out), replace them and try again. If that doesn't work, you need to look at electrical connections around main earthing points and stater motor connections

[brentstarburst]

Just thought I'd drop an update on this.

It went in and of course the car decided to behave. Problem was more or less daily.

After explaining the issue, the feeling was probably starter motor - so that was changed.

Five days later and the issue hasn't reoccurred. So, touch wood, we may have found the culprit.

Thanks for the advice all.