Scotty: I just used my new Innova 5610 on my 2005 Toyota Avalon with 150k miles on the odometer. There were no codes stored in system for the major engine and drivetrain components. 

There were only 3 codes in the module for the air conditioner : Air Conditioner B1421 Solar Sensor Circuit (Passenger Side): B1424 Solar Sensor Circuit (Driver Side).  B1424 was repeated as the third code for the air conditioner. 

And, there was a code B2780 for Immobiliser: Push Switch/Key Unlock Warning Switch.  I erased this code. 

I can detect no issues with the air conditioner and it is freezing cold and seems to work find.  Is there any thing that I should consider or worry about.  I just cleared these codes and will wait to see if they return. After erasing the codes the a/c module says B1400 normal for now.

Thanks, Jim