If you have pinned out your 89661 ECU but the vehicle refuses to start, check for these common faults:
Toyota pins count when looking at the face of the connector (the end that plugs into the ECU). On the back of the connector (wire side), you will find tiny numbers embossed in the plastic. toyota 89661 ecu pinout
This is the universal Toyota product code for an Engine Control Unit (Computer, Engine Control). If you have pinned out your 89661 ECU