[Toyoga]

Back when OBD2 first came out people had a lot of trouble passing their state inspections all over the US because the Readiness Tests could not be run by automobiles' OBD2 Monitors and were not all passed. Ford, GM, Chrysler,VW --all the manufacturers had what were known as "Drive Cycles" to get the sensors and the OBD2 Monitors to perform the Readiness Tests and they were all different. These Drive Cycles were finicky and highly specific--drive 27 MPH for 7 minutes; let engine idle at 2500 RPMs for 3 1/2 minutes; drive 36 MPH for 10 minutes; idle 4 minutes at 1500 RPM; drive 67 MPH for 8 minutes etc. Many cars had EVAP sensors and testing pumps that could not run their EVAP readiness test in the WINTER! They required an air temperature over about 47 degrees F. Some models of VOLVO and MAZDA would NEVER reset and turn off the MIL engine trouble light and California and then other states had to exempt them from that requirement to pass state tests. This is the first I have read concerning the 5th gen RAV having a Readiness Monitor fail. I agree--if you disconnect a battery the Monitors will all need to reset. If the gas cap is missing or loose the EVAP monitor won't be "ready". Also if there is an active DTC with a specific sensor failure or mechanical issue then one or more Monitors will not be "Ready" or "PASS". I'd be interested to know the "Drive Cycle" to put our RAVs monitors into the ready/pass state. As a practical matter--if most people just drive around randomly in stop and go traffic for a week or so and go on the highway a couple times then that should be enough to set all the monitors to pass/ready--assuming there is no sensor or mechanical malfunction.

I don’t know if this is applicable to the RAV4.
For my last car, a 2012 Subaru Forester, the Universal Drive Cycle instructions:
Start car, allow to idle for at least 30 seconds.
Drive for at least 10 minutes at speeds of at least 40 kph.
Stop car, but don’t stop the engine.
Allow to idle for at least 30 seconds.
Turn off.