It sounds like you've replaced the prox and tiller sensor, which is great. The 'TRC' error typically refers to the Traction Control System. It might be worth checking the wiring and connections to ensure there are no loose or damaged parts. Also, verify that the new sensors are properly calibrated and reset. If the error persists, you might want to check for any updates or diagnostics through the Toyota system or consult the service manual for further troubleshooting steps.

I just had this issue and eventually found one of the load wheel sensors out of range due to damage to the bracket it's mounted on.

thank you all for no reply.
i don't know why i wasted so much time on this forum answering questions for other techs and getting no no reply.
This was my last question ever on forklift action ever... my last words on Forklift no action
signing off for good
one very frustrated tech.