On my Acura TL 2004, Since couple if weeks my A/C is not working anymore and only pushing ambient air. A/C Clutch doesn't seem to kick in and no fuse is blown of according to Helms manual. However I have an error E2 on sensor #9 of inboard self diagnostic system of the Air conditioning unit. All other sensor look in good range. Where is that sensor located ?
Where should I look. Couple of hints of tips for me to nail that problem rather than getting my car for expensive research and pieces replacement.
Also, I noticed a clear lower efficiency of my A/C system last year, barely able to push fresh air of normal hot day. This year A/C do not kick in. Look like it died slowly rather than perfectly working state to nothing.
EDIT: Was still curious and found that running the self diagnostic test will the engine was running gave a different code. (Key at ON, start then hold OFF + push 5 time the recirculate button) to start the self test. This code are represented by segment in the 88-88 temperature digits. My TL result is displaying consistent error in with the segment L and N which reference to this:
L - An open in the passenger's air mix air mix control motor circuit.
N - A problem in the passenger's air mix control linkage, door, or motor.
I now remember that the A/V inefficiency I noticed last year was mainly coming from the passenger's side throwing barely cold air and driver side pushing cold one.
So I suspect the air mix control and/or motor to have completely died now. Is this possible the A/C is now not starting up for safety because it detect the passenger motor error ?