ECM pin out for a 90 TGP? anyone

[93gtpdohc]

I need a ecm pin out for a 90 TGP, so i can hook the wastgate control sol which i brought form GM for $19.50 Can, and to fix my a/c which doesn;t seem to wanna come on when i put it on, it works if i jump the relay, and i check the pressure, and it's fine,

[TurboGTU]

RE: ECM pin out for a 90 TGP? anyone

Pin A18 is for the WG control. You'll need to tap the EGR hot in run wire for the other wire for the WG control. You'll need to adjust the WG duty cycle tables though..might overboost or low boost.

The A/C problem is because both TGP and GTP use a different A/C pressure switch. The TGP is a on/off switch...the GTP uses a variable pressure swich. both switches are wired different..TGP uses two wires while the GTP uses 3 wires. both are powerd differnt and are pined on the ECM different. TO use the TGP setup...you would need a on/off swich from a older GP ac system. and wire it to pin D21 and what looks like pin C6 for the other wire. Then cut off pin C21 from the GTP wire harness. If it looks like its safe to cut the wires off completely from the GTP sensor..do so..becaue one wire is for the sensor output to ecm..the other two are refrence signals for Map sensor and the IAT sensor. Copy this if you need to. My A/C from my GTU acted funny after the TGP chip install. So I had riged it to a manual swich untill I realized they were wired different. I got my info from a Chilton 28682 Wbody manual.

[93gtpdohc]

would be able to get it scaned, and post it? i think i can use the orginal pressure switch, because i think since it's 2 wire, one half is use for sesing if theres enough gas in the line, and the other is for over pressure, i'll have to put a meter on it when i get a chance,

[TurboGTU]

Well the older system says it has a intermedate presure switch..the GTP doen't have this. The GTP has a A/C sensor which the TGP doen't have. Look in your a/c system for a 3 wire sensor...be it on the compressor or line or Can. Thanks to copyright..your OYO. Go to Autozone and look for the manual..im sure they won't mind you peaking at it. Pg. 6-32, 6-36.

[93gtpdohc]

actual www.gmtuners.com had the ecm pinout, that i need, and your right, i do need a low pressure switch, thanks