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information on air conditioner M48 street car
Posted:
Tue Jun 15, 2010 7:13 pmby remy78
Hello, is-it possible to use one input for the information (12V) when the air conditioner clutch is on and with this information is-it possible to increase the RCO of the idle regulation ? Thanks . Rémy
Re: information on air conditioner M48 street car
Posted:
Tue Jun 15, 2010 9:57 pmby Martin
Be very careful of connecting an inductive load like the AC clutch to an Dig or AT input on the ECU. The flyback voltage is very big and will damage the input in the ECU
Re: information on air conditioner M48 street car
Posted:
Tue Jun 15, 2010 10:05 pmby remy78
OK, thanks for the information, but it's not really an answer for my question.
Re: information on air conditioner M48 street car
Posted:
Wed Jun 16, 2010 8:30 amby SprinterTRD
No, A digital input normally sits at 5V which is considered to be logic level high. Putting 12V on top of the 5V does not change anything. The digital input needs to be grounded to be active or logic low.
Re: information on air conditioner M48 street car
Posted:
Thu Jun 17, 2010 6:55 pmby yotamhks
very simple but a messy and prehistoric.. solution :
Get a Relay, wire it as follows:
30
chassy ground/sensor ground
87
digital input 1/2
85
air condition +12V when on
86
chassy ground
you can use a transistor to do this but i don't know which transistor would fit there.