Jump to content

Engine temperature (Dashboard)


Recommended Posts

If its a simple PWM signal that has the duty cycle varied not the frequency then yes it can be done with the G4 and onwards units.

Ideally if you had a sample of the signal through the temp range we could confirm.


Edited by Simon
Link to comment
Share on other sites

  • 1 month later...

This is what I have tested 8 years ago using a Link G3,

17Hz is high temp (Max)

18-19 Hz is 3/4 high

20-23 Hz = middle = target

23-30 Hz steps to minimum temp.


This is what another person has tested,

Just got some readings from the ECU output after setting the temp input on the ECU with a POT. Readings have been verified with OBD.


Temp C* -> Hz

54 -> 31.14 (second white bar)

59 -> 29.68

64 -> 28.35

70 -> 26.9

76 -> 25.6

82 -> 24.3

87 -> 23.5

91 -> 22.8

111 -> 20.25

119 -> 18.8 (second to last)

124 -> 18.4 (last white bar)


132 -> 17.6 (First Red)

142 -> 16.68 (Second Red)


82* is exactly at the 3 o'clock position

76* is just under

it appears somewhere over 115 is the cut over point to go above 3 o'clock


Link to comment
Share on other sites


The upcoming release has a frequency table. The frequency minimum step is 2 Hz, and some of the data you have presented has changes of less than this. However the frequency will interpolate when between cells. Here is how you would set it up:



Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...