TCU - Throttle Position

Assistance please

I have a 914 that which over boost.

With TLR software checking the TCU download and to monitor settings i found the following.

Throttle Position does not display on Monitor mode

I checked the following:

1. TPS and changed

2. TCU and changed

3. Wiring from TPS to TCU all okay

All other sensors display in Monitor mode.

Please advise what else can i check