preludetypes200

what is the difference b/w a p5p and a p5m ecu?

Tee-Dot

P5P: JDM H22 TYPE-S / USDM TYPE-SH OBDII

P5M: JDM H22 SiR OBDII

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preludetypes200

heres the kicker.....I have a type sh...it has a p5m originally..... atts functions correctly..
p5p will not communicate with atts.

KraserK

You sure? lol.

preludetypes200

100% SURE. type s ecu was labled. the ecu i took out said p5m. Very confusing. thought the p5m was a base model ecu. Swap has been a pain in the ass with ecu's. The original keeps throwing missfire codes above 2500 rpms. the type s ecu cause the atts to throw communication codes. has no 5v on the VREF line to atts ecu. Sent p5p ecu back to tigerjapanese and they tell me they dont have any others and will give me 150 bucks.....does me no good. not sure why the p5m ecu throws the misfire codes...any ideas? and its not missing at all.

KraserK

I know an idea get another type s or sh ecu and try it.

EDIT: Oh and if that don't work then its not the ecu and something else is not working or a fuse is blown. I think there was an atts fuse. Yeap there is an atts fuse.

preludetypes200

The p5p ecu that came with the type s set up had no 5v ref coming out to the atts computer. plug in orginal p5m ecu that was in the type sh. and I had my 5v ref. Computer issue..hence...the post