Pin-out diagram for 1G turbo ECU
Pin-out diagram for 1991 Hyundai Sonata ECU
The * on the Hyundai pin-out denotes the ONLY pin in the same place on both diagrams.
(Pin-out picture is looking into the ECU. Not at the front of the connectors that plug into it. Just like the picture below. Upper-left pin is #1)
Location of the Hyundai Engine ECU
Original 1991 Hyundai Sonata ECU - has a 8-bit microprocessor
Turbo ECU from a 1993 5-speed AWD Eclipse - should also have a 8-bit microprocessor
1993 Eclipse GST Automatic wiring harness
Location of the stock Mitsubishi Automatic Transmission ECU
The Hyundai Sonata transmission ECU is made by Mitsubishi. This is not getting changed.
Disassembling the dash :(