Date: Wed, 27 Feb 2002 21:06:58 +0000 From: Johannes H Andersen <johsnopsamanytime.co.uk> Subject: Re: 9-5 2.3L chip tuning
Goran Larsson wrote: > > In article <3C7D1726.A270C63Dnopsamanytime.co.uk>, > Johannes H Andersen <johsnopsamanytime.co.uk> wrote: > > > AFAIK, the eprom chip contain numerical maps or tables. The software > > is already in the ECU. > > The ECU used in the 9-5 is Trionic 7 (T7). T7 has all its software, > maps, and tables in a surface mounted flash memory. Any competent tuner > will download the new software (including maps and tables) through the > diagnostics connector without any physical changes inside the ECU. The > flash memory is the large non-square chip in the lower corner in this > image: > > < http://www.bsrab.se/bilder/1_trionic7_bla.jpg > > > -- > G–ran Larsson hoh AT approve DOT se OK, so that's cleared up. The effect of 'chipping' however, must come from the mapping more than anything else. Presumably, the software is for interpolation of tables. Johannes