I think model truck should be 7bws13
ETAC did not receive CAN data from transistor controller.
Possible Causes
with corrective
actions/checks
1. Short or open circuit in CAN wiring.
2. Electrical noise in CAN wiring due to bad connection, outside interference or low
voltage.
a. Check CAN wiring.
b. Try driving using a known-good battery.
c. Try driving in a different environment.
3. Bad transistor controller.
a. Check transistor controller for error code.
4. Bad ETAC.

Also check the main off switch