6G Celicas Forums

right i have trawled for weeks now to find out how to get the st205 IC pump to run constantly. i know i could just put a live feed and earth to it and run it off a switch but its my understanding that its connected to the ecu and will therefore put the engine check light on. Someone please help me...!!!!!

oh and for a nice easy mod on the stock st205 chargecooler clean out with petrol or a very high quality de greaser and apply heat shielding to the underside and you will see charge temps drop dramatically.... i was seeing 50-55 deg centigrade at 1.1 bar of boost and a ambient temp of about 7degrees centigrade, i am now seeing 30-35 at the same boost pressure and same ambient temp and i am yet to finish the heat shielding properly. NOTE when you flush the chargecooler, if there was a fair amount of oil in there it will smoke heavily as the deposits gradually work their way out.

http://celicatech.com/forums/showthread.php?t=11119

that should help you .

i dont think you understood fully.... i dont have a code 54 showing up as i already have the chargecooler level sensor bridged. i am after information as to how to get the pump to run constantly without an ecu error code....

I have the pump running off my ignition switch - always on when the cars on.

how do you stop the ecu error code 54 appearing?!

how do you stop the ecu error code 54 appearing?!

I have an ST185 3s w/ST185RC intercooler so I dont get a code 54.

you need to ground a pink wire on your ecu. Thats for the 185rc ecu anyway.

i think its the win pin

link

right i have the wiring diagram which shows three wires from ecu to pump. they are M+, M-, and MTT you dont have any idea what the pink wire was on your 185??? it wil give me a good shove in the right direction

I'm not sure what to ground on the 205. Maybe Wannabe will see this thread, he might be able to shed some light

Good luck

I'll try and remember to look when I get home.

Splice into the blue wire on the 26 pin ECU connector (when lookin at the back of the connector it's the 5th from the left on the bottom row) and run a wire to ground. That should allow the ECU to think it's functioning normaly. However, I couldn't find out what the function of the M+, M-, or MTT wires were. If they are there to sense that the pump is running when it shouldn't, then it will probably throw a code. If that is the case, we'll have to come up with something else. It could be as simple as one or two relays.

this might help understand, i havent really had a chance to study it fully yet myself
http://www.st205.net/techinfo/ewd/ewd2b.jpg

I found this scan to be quite helpful as well:
http://www.st205.net/techinfo/205turbocircuit.jpg

Go ahead and try it and see if it works without throwing a code. If you do get a code I'm sure we could figure out something else.

back to the drawing board methinks. earth the blue wire and after 30secs the light comes on (prob when the ecu is trying to turn the pump off???)

I was afraid of that. If you can measure the voltage of M+, M-, and MTT when the pump is running and when it is stopped with the stock wiring configuration, we can probably figure this out pretty easily. Hopefully it's a simple voltage output that we can interupt with a relay so that it thinks it's off when it's supposed to be.

same idea as i had although i ran out of light and patience yesterday. ill see whats happening at those terminals