8 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHsecret temp guage-what years
Leading reported evidence
Use a/c panel display illumination
Performed · outcome unconfirmed
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0
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0
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1
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Read evidence and context
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Performed · outcome unconfirmed
58 & 58d voltage) - used for A/C Panel Display Illumination
Leading evidence: 'Use a/c panel display illumination' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace temperature display' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Suggestion
It also shows how to change the temperature display from C to F.
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Suggestion
30c - Engine Run Time in seconds (255max.) (=0Xff)
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Suggestion
When not moving, the Instrument Cluster OBC Temp Display retains it's last setting until moving.
Use lower of the two values in determining fresh-air temp
Suggestion or failed attempt
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Suggestion
The Climatronic uses the lower of the two values in determining Fresh-Air Temp.
Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
8 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
911uk: 1 discussions
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Generation: 20261026T222516Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
It should work on your car. THe hack only worked on the pre-facelift cars. Make sure you hold the 2 buttons down for long enough. Can take up to 10 seconds.
For the benefit of the thread, instructions are:
Press and hold the UP button then at the same time press and hold the RECIRC button in.
After 5 seconds or so of holding the buttons in the display changes to 1C.
To see the reading corresponding to 1C press the button on the climate control below the UP button (this is the button for directing air through the centre dash vents).
To move back to the 1C press that button again. To go to 2C, 3C, 4C etc etc press the + button on the temperature control (not the fan speed +).
To exit this mode press the AUTO button.
-----------------------------------------------------
0c - ERL
1c - Oil Temp
2c - Inside Temp - From the Sensor mounted in the Aspirator Assembly at the side of the Dash
3c - Outside Temp - From the Sensor inside the Air Inlet of the A/C Unit
4c - Outside Temp - From the Sensor in Front Grill of the Radiator. Data is fed to the Climatronic from the Instrument Cluster. When not moving, the Instrument Cluster OBC Temp Display retains it's last setting until moving. This is to prevent heat emanating from the Radiator affecting the Temp Sensor. The Climatronic uses the lower of the two values in determining Fresh-Air Temp.
5c - Outside Temp - matches OBC outside temp display
6c - Coolant Temp
7c - Footwell Discharge Temp
8c - Sun Sensor (dash top)
9c - Sun Sensor
10c- Passenger Compartment Fan Speed
11c- Passenger Compartment Fan Voltage
12c- Temperature Mix Flap Command (1=COLD, 100= HOT)
13c- Temperature Mix Flap Position
14c - Central Flap Command
15c - Central Flap Position
16c - Footwell/Defrost Flap Command
17c - Footwell/Defrost Flap Position
18c - Recirculation Valve Command (1=OFF, 100=RECIRC)
19c - Recirculation Valve Position (feedback)
20c - Vehicle Speed in kph, updates once per second. This is True Speed, not the Speed+Safety Margin displayed by the Speedometer.
21c - Engine RPM in hundreds, also updates once per second
22c - ?
23c - ?
24c - Sun Sensor, Exterior Lights Switch, and Panel Lights control (term.
58 & 58d voltage) - used for A/C Panel Display Illumination
25c - ?
26c - ?
27c - ?
28c - Fan Speed
29c - ?
30c - Engine Run Time in seconds (255max.) (=0Xff)
31c - Timing Counter
32c - Displays Test
33c - Software Version (usually 3.4)
34c - ?
35c - Outside Temp from Inlet Sensor (filtered)
36c - Temp
:thumb:
I still don't think you can display the oil temperature.......
The aircon panel is made by Audi, and the "hack" was originally documented on an Audi forum. Attached are the instructions from that thread, and the data you can read.
It also shows how to change the temperature display from C to F. This only applies to earlier cars (
not
all pre-facelift cars).
