Toyotas mostly have a diagnostic socket with a flip up lid in the engine bay.
Inside the lid there's normally a label showing which pins are which.
Joining T+E1 with a link wire typically flashes error codes on a light in the dash.
On the IS200, these 'pins' aren't present in the diagnostic socket.
Codes are read using a tester plugged in under the dash instead.
Not sure if something can be fiddled under there or not.
Altezza may differ from IS200 ??