repair manual

i'm living in the carribean, i bought an altezza from japan
i'm getting error code p1656 says i'm having a circuit malfunction.
a bad wiring probably says my machanic.
I badly need a repair manual for the alteza inline 4 cylinder 3sge
(rs200z) but can't seem to find it anywhere.
Can any of you tell me where i can order one?

thx a ton