The NA 996 "Normal operating temp" thread

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5chn3ll
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The NA 996 "Normal operating temp" thread

Post by 5chn3ll » Wed Sep 19, 2018 1:33 pm

Since this is a thing on every other site, I wanted to start this off by suggesting that you use the Torque app and your phone with a wireless OBD-II dongle or, if you have a MK1 996, learn the HVAC control voodoo to display actual values rather than relying on that useless dash gauge.

Here's a screenshot of one page of my Torque values, including the coolant temp value. My C4 is equipped with an aftermarket third (center) radiator...
Screenshot_20180917-141624_Torque.jpg

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Re: The NA 996 "Normal operating temp" thread

Post by 5chn3ll » Wed Sep 19, 2018 1:38 pm

The following text from the site "pistonheads" (https://www.pistonheads.com/gassing/top ... 8&t=647763) explains how to use the MKI HVAC console to display actual values:

The AC Climatronic unit is actually manufactured by Audi. There is some sort of serial data stream (not CAN) that allows the AC unit to display engine parameters. This works on 1997-2000 boxsters.

To switch from F to C:
Hold down the recirculating button then push both the temperature + - buttons.

To access diagnostics:
Hold down the Recirculating & Air up buttons for 5 seconds. The + - buttons go up and down through the list of "c" codes. The center vent button switches the left display between the "c" code and its actual value. Press the Auto button to exit.
Here is a list of what can be seen:

0c - ERL
1c - Oil Temp?
2c - Inside temp. Sensor mounted in the aspirator assembly at the side of the dash.
3c - Outside temp. Sensor located inside the air inlet of the A/C unit.
4c - Outside temp. Sensor located in front grill of the radiator. The 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 temperature sensor. The A/C unit uses the lower of the two outside air temp values in determining fresh-air temp.
5c - Outside temp. (matches with 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, updating only once per second. (real speed, not speed+safety margin as in the speedometer)
21c - Engine RPM in hundreds. This too only updates once per second.
22c - ?
23c - ?
24c - Sun sensor, exterior lights switch & panel lights control (term. 58 & 58d voltage) - used for A/C panel display illum.
25c - ?
26c - ?
27c - ?
28c - Fan speed?
29c - ?
30c - Engine run time in seconds (255 max.)(=0xff)
31c - Timing counter
32c - Displays test
33c - Software version? Mine states 3.4
34c - ?
35c - Outside temp. from inlet sensor (filtered?)
36c - temp?

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FRUNKenstein
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Re: The NA 996 "Normal operating temp" thread

Post by FRUNKenstein » Wed Sep 19, 2018 1:44 pm

Heh, you said "dongle".
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gnat
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Re: The NA 996 "Normal operating temp" thread

Post by gnat » Wed Sep 19, 2018 2:15 pm

Meh. I go with the "if it's not on fire, full throttle". That of course is coupled with "if it is on fire, roll down the windows and turn the heat on full". So far so good.

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Re: The NA 996 "Normal operating temp" thread

Post by 32wildbilly » Wed Sep 19, 2018 2:42 pm

So your highest rpm was 3,442,000! Holy Crap! That's got to be a stage 2 over-rev! :D
.........................................................................vvvvv.........................
Screenshot_20180917-141624_Torque.jpg

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Re: The NA 996 "Normal operating temp" thread

Post by b3freak » Wed Sep 19, 2018 4:41 pm

32wildbilly wrote:
Wed Sep 19, 2018 2:42 pm
So your highest rpm was 3,442,000! Holy Crap! That's got to be a stage 2 over-rev! :D
.........................................................................vvvvv.........................
Screenshot_20180917-141624_Torque.jpg
What impressed me was he did that amazing overrev at only 32 mph. ha! :lol:
Last edited by b3freak on Wed Sep 19, 2018 6:00 pm, edited 1 time in total.
2002 Porsche 996 Carrera - bare bones basic, but still a blast to drive! Heck, I don't even have PSM on it. Ha!

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Re: The NA 996 "Normal operating temp" thread

Post by 32wildbilly » Wed Sep 19, 2018 5:45 pm

b3freak wrote:
Wed Sep 19, 2018 4:41 pm
32wildbilly wrote:
Wed Sep 19, 2018 2:42 pm
So your highest rpm was 3,442,000! Holy Crap! That's got to be a stage 2 over-rev! :D
.........................................................................vvvvv.........................
Screenshot_20180917-141624_Torque.jpg
What impressed me was he did that amazing overreact at only 32 mph. ha! :lol:
First gear standing launch!

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