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Sometimes when I switch the car on, the recirculation light illuminates. That means I have to press the recirculation button to turn it off, and before using the heater ventilation. I found this in my search: http://www.cardiagnostics.be/-now/Self%20Diagnose%20Toyota%20Corolla%20ECC-panel.htm Out of interest, I tested this on my car and it works. Back on the subject of the recirculating light illuminating on every start up, the car did it at first during the first few months, then the heater system stayed in the last settings used. I think I must have disturbed something recently as the recirculation light is illuminating again on start up. I took most of the centre console and dash trim to plug the AUX extention cable into the original AUX socket, tucked away under the console. No other cable was touch or disturbed as farn as I know. I took removed the four dash/console panels and checked all connections again but no joy. The manual states that the system may switch to recirculating mode when set to coolest temperature in summer. This may be the answer as I did lower the temperature recently! Will do more checks to confirm how the heater functions. The manual is very poor in explaining that if the temperature setting is lower than 18c, recirculating mode will come on. Above 18c the recircuation light will not come. This is regardless if the system is in manual or auto mode. Also changing the temperature higher whilst in use will switch off recirc and visa versa. So this is normal function of the heater.

I found that if the temp inside the car is a fair bit hotter than the temp you select on the dial, then the recirc would come on automatically. To test my theory turn the dial temp up and see if it still puts recirc on itself. Edit...there was a thread about this a while ago...

It definitely gets worse the more traces that are cut, actually I had 3 or 4 and it progressively improved as I repaired them.

I haven't got any diagrams. But it is easy to get the door lining off. There are two screws in the hand hold things and then you can just pull it off. You will see all the earth points. The aerial earth is under the top bit of trim that also pulls off. The part I suspect is on the bottom of the door on the left. I think this is some kind of suppressor. It has a wire in each side. I have spoken to my local Toyota dealer and he can't find this part on his drawings.

Actually they fit just fine :)

The recirc is indeed very useful whether you have pig farmers or smoking diesels in front of you. Sent from my iPhone

Hey Gary, around here the farmers use that liquefied pig manure. The recirc button is absolutely essential, pure gagging that smell.