2010 Q5 2.0 tdi- Ambient temperature sensor wiring
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2010 Q5 2.0 tdi- Ambient temperature sensor wiring
Hi, I've been on voyage of discovery regarding an Intermittent AC issue on my 2010 Q5 but have arrived at hopefully the root cause of the issue..... and it's been staring me in the face all along.
The ambient temperature isn't displaying on the dash. I considered it nothing but it now seems or appears that without a reading the compressor clutch can disengage. I have had an error reporting a short on the sensor too so this will impact the communication.
So hopefully, fix the ambient sensor issue and the AC works.
Replaced the sensor itself and the sensor socket so It's clearly a wiring issue between the sensor and where it goes to..... has anyone on here had this issue?... do they know where likely the wire may have been damaged and how best to access it?
Fingers crossed someone can point me in a good direction with it.
Just for info, system is pressurised, pressure switch replaced, the ambient temperature sensor and sensor housing has been replaced, clutch has no voltage/signal when AC button is activated and the AC has worked on and off (more off!!!)
The ambient temperature isn't displaying on the dash. I considered it nothing but it now seems or appears that without a reading the compressor clutch can disengage. I have had an error reporting a short on the sensor too so this will impact the communication.
So hopefully, fix the ambient sensor issue and the AC works.
Replaced the sensor itself and the sensor socket so It's clearly a wiring issue between the sensor and where it goes to..... has anyone on here had this issue?... do they know where likely the wire may have been damaged and how best to access it?
Fingers crossed someone can point me in a good direction with it.
Just for info, system is pressurised, pressure switch replaced, the ambient temperature sensor and sensor housing has been replaced, clutch has no voltage/signal when AC button is activated and the AC has worked on and off (more off!!!)
AudiWorld Super User
Joined: Dec 2001
Posts: 13,996
Likes: 3,376
From: Georgia
The G17 ambient temp sensor has two pins on it. Pin 1 (green/brown) goes to the sensor ground line of the J519 BCM (09 - central electrics). Pin 2 (green/white) goes to the sensor line, also on the J519. Both are on the 32-pin black connector. Pins 25 (green/brown) and 10 (green/white). That pin 25 sensor ground is used by a number of sensors, including the brake fluid level sensor, etc.
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