My engine is in an '87 MR2, and is currently running the stock Toyota ECU. The donor car was a '98 Avalon and my harness based on a '99 Camry. There are some different configurations of the 1MZ but I'm hoping the adapter board will work in a Camry or Avalon too.
-No changes to chassis wiring
-Fits in stock ECU case
-Car needs to run the 2020 season so the turbos and speeduino can't go in until winter 2020/2021 at the soonest
-I'll be working on this adapter board as I have time
Information I have Collected:
ECU Connector: TE/AMP 8-5353015-1, 122 pin, 5 plug
Crank Wheel: 36-2
Cycle Sensor: Camshaft, single pulse, right bank when facing the timing belt, nearest cylinder 6
Injectors: High-Z (14 ohm), pull low to squirt
Ignition: 3 COP, wasted spark, with igniter
Firing Order: 1,2,3,4,5,6
-When looking at the timing belt the cylinders down the left bank from front to back are 1,3,5 and on the right bank from front to back are 2,4,6.
-The coils are on cylinders 2, 4, and 6, and connected to cylinders 5, 1, and 3, respectively.
IAC: 4 wire, dual driver, rotary solenoid, 17 ohms to 30 ohms, pull low
MREL: The Camry ECU senses the key on with the IGSW input pin. The ECU then turns on the MREL pin, activating the main engine relay and powering the rest of the ECU and its peripherals. The reason they do this is so the ECU can stay on for a few seconds after the key is turned off and step the IAC to the wide open position for the next start. My MR2 chassis is not wired this way, but we should be able to replicate this behaviour on the adapter board. I think some SW20 swaps are wired this way, I would love it if someone knows for sure and could confirm?
Tach Signal: The AW11 chassis needs a high voltage signal to drive the tach, unless it was a supercharged version. I have already converted my tachometer to use a 12v tach signal, which is what the Camry uses. I'll add a level shifter on the board to convert the 5v speeduino tach signal to a 12v signal for the chassis.
Irrelevant Info for anyone curious:
-twin turbo, (td04l-13t)
-classed for SSM autcross/ street prepared hillclimb
-2MZ intake/ 3MZ exhaust cam
-target 300hp to 350hp
I'll add some photos and preliminary design files tomorrow.