View Full Version : Need info on some 5SFE ECU pinouts

The Captain
02-16-2012, 12:38 AM
Trying to figure out what are the following on a 5SFE ECU




The third ECU plug on my car is a 12 connector, not the 14.


02-16-2012, 02:29 AM
ACA is the signal the ecu uses to idle up when the compressor clutch is engaged. ACT is the cut signal that temporarily shuts off the magnetic clutch when you go WOT. ATS should be an empty pin and only used on the RC ecu. Nonetheless, ATS would be the signal sent from the ecu to idle up when the a/c is turned on.

I think that maybe the models with climate control used a two stage system to control the idle up for the a/c. ACA was the input signal to the ecu letting it know the magnetic clutch was engaged. ATS was the output signal to idle up. That signal should have been sent to the vsv on the firewall. ACT being the cut signal for WOT.

The Captain
02-16-2012, 03:51 AM
Thanks! (again)