Toyota speed input supralink

HI guys, Issue with JZA80 supra with plugin ecu and r154 with speed sensor. Car was in storage for a couple years and recently back up running but I noticed that the ECU is now not receiving or reading a speed signal. It does have a new speed sensor fitted and I did have to extend the wires going to the sensor. The odd thing is the dash speedo still works fine. My understanding is this sensor feeds into the dash and then to the ecu. I thought it maybe the wiring from dash to ecu so ran

JZA80 speed signal from factory goes from the Speed sensor -> Dash -> Odometer -> ECU The odometer changes to signal from one type to another before sending to the various ECU's on the car including the engine ECU. If your dash speedo works, then investigate the speed signal wiring between odometer and the Link ECU. Most JZA80 speedos always read incorrectly due to wheel changes etc. So normally when doing Link ECU install I change the wiring for speed signal to: Sp