Your vehicle is not designed to be dinghy towed (with 4 wheels on the ground) behind a motor home.

■To avoid serious damage to your vehicle Do not tow your vehicle with all four wheels on the ground.
Trailer towingToyota CH-R Service Manual > Theft Deterrent / Keyless Entry: Electrical Key Oscillator(for Rear Floor)
Components
COMPONENTS
ILLUSTRATION
*1
BENCH TYPE REAR SEAT CUSHION ASSEMBLY
*2
NO. 2 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY
*3
REAR CENTER SEAT OUTER BELT ASSEMBLY
*4
REAR SEAT CUSHION LOCK HOOK
...
Toyota CH-R Service Manual > Can Communication System: Certification ECU Communication Stop Mode
DESCRIPTION
Detection Item
Symptom
Trouble Area
Certification ECU Communication Stop Mode
Any of the following conditions are met:
Communication stop for "Certification (Smart)" is indicated
on the "Comm ...