More info: AC diagnostic codes are 23 (pressure sensor) and 31 (air mix damper position, front) Online research leads me to believe that the main plastic gear in the air mix control servometer has stripped. Request: Would like to know if you concur and if so where is this servo? I have removed driver dash console, AC controls, and radio, but do not see the servo assembly.
Clicking noise in dash when automatic AC control is on. on 2002 Toyota Sienna
by nolanregal in Bloomington, IL on August 26, 2011
ANSWER by patrick mannion , August 26, 2011
Your research sounds correct. There is a company that independent auto repair shops get their information from, this same information is available inexpensively for people that work on their own cars.. The information is year make and model specific, covering repair procedures, torque specifications, fluid capacities and specifications, service bulletins, component locations, wiring diagrams ect.... Alldata is very easy to navigate http://bit.ly/AllData_Repair_Manuals_Online