Chaps

I'd like to check I haven't got any faults with the car ( GS300 mk 1) but do you need a code reader to get a fault code or is there a system of flashing lights and bridging pins like on most stuff this age?

Admittedly the car drives well and theres' no MIL lights on but I'm trying to improve the fuel consumption and would like to check everything out

If I do need an OBD reader which one will suit?

Mk1 isn't OBDII compliant so no code reader available unless you get the required one from Lexus/Toyota at huge expense.

The codes can be read counting the flashes on the check engine light. Can't remember the pins that need to be shorted in the diagnostic socket off the top of my head but can find out later if you need it.

you bridge pins e1 and te1 if i remember correctly...