For what it is worth my 90 series prado (2000 model) petrol with vzj95r engine is throwing the check engine light. My prado has the same plug in the engine bay as lone wolf pictured above. I looked under the dash as suggested above, there is indeed an obd plug on the lhs of the drivers side footwell. I plugged my obd2 scanner in and downloaded a free scanner from google play and had to click the correct protocol (eobd or obd from memory). I turned on the wifi on on my phone and it did connect and showed me a fault code! so it does work!! cheers
