If This is 3.0litre one with 4jx1 engine(should be),there are no blink codes. You need Carmanscan, TECH2 or something what can read it.
You are lucky as yours is running. I always have seen only dead ones. Be careful with that engine as there is interesting fuel injection system and interesting faults. Better say customer that You don't know anything about these cars and send it away to somebody who can read it.
Cheers!