Accessing Climate Control Codes
There a number of sensor values that can be displayed via
the climate control system.
The list of codes here are not from a TT but 90% will work as described.
How to access them is explained but here's a pictorial to simplify it a little.
The display will change to 1C,
Twist the temperature dial to increase or decrease the
displayed code
e.g.20C
Press Recycle to activate the display
e.g. 20C = Voltage display
Then simply twist the temp control to select other codes
While in this mode you wont be able to adjust the climate
temperature,
Just press Recycle and Up to go back to normal operation.
Of the codes I found, a few are of the most use
in normal driving
the others are really for diagnostics
20C = Voltage
49C = Coolant temp (Accurate)
48C = Display test
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Climate Control
Codes