This is the JZA70 ECU. The Supra 1JZGTE twin turbo was available in Japan Automatic and Manual. If you are swapping into an MK3 Supra, this is the ECU you want to use as it matches the chassis.
For other swaps the JZZ30 ECU below might be easier to find. The descriptions of the pins above apply the same way to the below connections.
