View Full Version : MINES SW20 ECU on ST185

01-14-2016, 08:18 AM

I have a problem with my 1990 celica st185 204 ps europ version.

on ebay i purchase this mines ecu

http://www.ebay.com/itm/321186978770?_t ... EBIDX%3AIT

I have it plugged in directly : The motor control light is always on, engine is running and takes no gas on, similar to when the fuel pump was broken :S

The DTS don't rule (fakecodes)

I think the MINES one is a SW20 1 ( JP ) ECU , right ?

I have this compared with the pinouts to the connector and cable colors...

http://gt4.mwp.id.au/Electrical/All%203 ... iagram.png

my own shoud be the ST185 (USA+CND ) pinout ?

The only difference in pinouts is :

Mines : STJ and EGR missing

My Own : ACT and CCO missing

the rest is in line

What am I doing with STJ , EGR , ACT and CCO ?

sorry for my bad english.....thx alex

01-15-2016, 03:12 AM
Hi Alex,

Your pinouts are probably different than US/Canada.

If you open the ECU cover [4 screws] you can see the pinouts. Toyota usually labels their circuit boards.

01-15-2016, 03:19 AM
It will look like this. Each terminal is labeled where the "wire" connects to the board on the left side.

01-25-2016, 12:04 PM
Ok, thanks for this input.
I am now getting a bit further , I know the exact pinout of two ECUs .
the difference is that MINE'S has this pins, which is missing on my ST185 harness /ECU:

CCO = to Check connector
PS = Power Steering
PSCT=Power Steering ECU
EGW= Exhaust temperature sensor ( whats the different to THG ? )


these pins are not available ( yet ) on my Harness / ECU ( Europa ST185)