Adaptronic ECU, stand alone engine management system

 

I just bought an Adaptronic e420c ECU and now I'm ready to install it...

...
ECU installed and working!

The e420c manual is very detailed, and when some doubts remain there is the Forum to put your questions: Andy, Cory and the users will certainly answer.

Below some infos that can be useful for others Fiat owners to do the same work.
My Fiat 1.8 16V mounts an Hitachi ECU and the conversion with the Adaptronic one is quite easy.

These are the sensors for timing (hall, on cam) and RPM (reluctor, on crank):

Here a few info about idle solenoid, that is PWM controlled:

Clic here to view the wiring diagram of the Adaptronic E420C (pdf, 530 kb)

Well, you can do a clean installation simply by connecting the wires coming out from Adaptronic to those of your standard harness, according to this scheme:

Adaptronic pin number Hitachi pin number
J1 - 1 Connector A - 112
J1 - 2 Connector A - 107
J1 - 3 Connector A - 108
J1 - 4 Connector A - 116
J1 - 5 Connector A - 103
J1 - 6 Connector A - 101
J1 - 7 Connector A - 105
J1 - 8 Connector A - 110
J2 - 1 Connector A - 113 (air conditioner relay)
J2 - 2 Connector A - 109 (idle solenoid)
J2 - 3 Connector A - 106 (purge solenoid)
J2 - 4 Connector A - 114 (timing variator solenoid VVT)
J2 - 5 Connector B - 12
J2 - 6 Connector D - 40 and 48
J3 - A1 free (dig. in)
J3 - A2 free (dig. in)
J3 - A3 free (dig. in)
J3 - A4 free (dig. in)
J3 - A5 free (I connected analog wide band O2 signal)
J3 - A6 Connector C - 16 (EGO), connect 26 to shield to gnd
J3 - A7 not present, connect positive wire of your MAT
J3 - A8 not present, connect positive wire of your MAP
J3 - A9 not present, connect negative wire of your MAP
J3 - A10 Connector C - 25
J3 - A11 free (dig. in)
J3 - A12 free (dig. in)
J3 - A13 free (dig. in)
J3 - A14 Connector C - 28 (A/C activation)
J3 - A15 Connector C - 21 (KNOCK), connect 31 to shield to gnd
J3 - A16 free (aux temp)
J3 - A17 Connector C - 15
J3 - A18 not present, connect signal wire of your MAP
J3 - A19 Connector D - 37
J3 - A20 Connector C - 32
J4 - B1 none (ignition3/tacho)
J4 - B2 Connector B - 2 and 7 (wasted spark)
J4 - B3 none
J4 - B4 Connector D - 41 (white intern.) and 35 (shield)
J4 - B5 Connector D - 42
J4 - B6 none
J4 - B7 Connector B - 10
J4 - B8 Connector B - 9
J4 - B9 Connector B - 1 and 8 (wasted spark)
J4 - B10 none
J4 - B11 Connector D - 33
J4 - B12 none
J4 - B13 Connector D - 34
J4 - B14 Connector D - 36
J4 - B15 free (Aux out)
J4 - B16 Connector A - 104 (fuel pump)

but always remember that the numbers sequence of Hitachi-Connector D is wrong: it starts from left to right and not opposite like the original picture shows (see above on this page the Hitachi pin out).