Check connector Nissan before 1990

[seb.racing]

Hi

I have a service manual Nissan Silvia S12
I noticed in the page ECCS circuit digram
the location of a check connector
but no connector over the car
would it be possible to set up a consult connector on this model ECU?

[skylinegtrhr]

No,
same as S13 EDM CA18 and there is connector but not consult , on S13 You have option of http://www.nistune.com/equipment-products-type1.php and board is emulating all consult functions but still not for S12...

[seb.racing]

yes, I am inform to Nistune
http://forum.nistune.com/viewtopic.php?f=7&t=1327

it is possible to install nistune type 1 on the ecu CA18ET
the ECU CA18ET is the same conception as the ECU Z31 VG30

the question is:
why is there a check connector on nissan electric wiring
the nissan mystery

[seb.racing]

no idea for connecting an connector consult?