Your vehicle is not designed to be dinghy towed (with 4 wheels on the ground) behind a motor home.
Notice
To avoid serious damage to your vehicle
Do not tow your vehicle with 4 wheels on
the ground. 
To prevent causing serious damage to the transmission and dynamic torque control awd system (awd models)
2Wd models: never tow this vehicle from
the rear with the front wheels on the
ground. This may cause serious damage
to the transmission. 
Awd models: never tow this vehicle with
any of the wheels on the ground. This
may cause serious damage to the transmission
and dynamic torque control
awd system. 
Trailer towing tipsRemoval (2005/11-2006/01)
Disconnect cable from negative battery
terminal
Caution:
Wait at least 90 seconds after disconnecting the
cable from the negative (-) battery terminal to
prevent airbag and seat belt pretensioner activation.
Remove front door scuff plate lh
Using a screwdriver, detach the 10 cla ...
Terminals of ecu
Check occupant classification ecu
Measure the voltage of the connector.
...
Symptom confirmation and diagnostic trouble code
Hint:
The diagnostic system in the rav4 has various
functions.
The first function is the diagnostic trouble code
(dtc) check. A dtc is a code stored in the ecu
memory whenever a malfunction in the signal circuits
to the ecu occurs. In a dtc check, a previous
malfunction's dtc can be ch ...