TonyWilliams said:To test if the heater is working requires no special tools or knowledge.
1) Use a simple 10mm socket or wrench to remove the 5 screws from the black plastic "motor cover" that says Toyota (or does it say RAV4 EV?)
2) Remove the plastic cover
3) Turn on car to READY
4) Turn on cabin heater to AUTO with a temperature setting well above ambient
5) Put your hand on the physical Denso 6kW cabin heater... it should be getting hot
6) If not, you need a new cabin heater.
It doesn't look like swapping out that heater unit is too difficult. I'd be interested to know more about how the coolant purge procedure is performed.
I'm curious about this text from doug401's service tech.
Verified no heat from heater, Inspected Continuity of cabin heater fuse through DC/DC converter at cabin heater terminal + to main power cable, has open circuit. Inspected resistance of cabin heater at cabin heater connector, has 222 ohms at connector (readings same checked + to - & - to +). Needs cabin heater & DC/DC converter. Called TAS case #TA133430164. Replaced in cabin heater & DC/DC converter. Performed collant air purge & thermal system test. rd tested ok, heater operation normal
Do you suppose this operation is documented in techinfo.toyota.com somewhere? I'd like to be able to determine if my DC/DC converter is affected.