J90 pre D-4D engine code diagnostics useful website

[Mick W]

Found this while searching for diagnostic tests for my 90 which has a wire link diagnostic socket in the engine bay. Is the earlier non D-4D engine so this link might be useful to others. Sorry if this is covered already but I didn't find it;
https://codes.rennacs.com/Petrol-Engine/Japanese-Korean/Toyota-Engines.php