Technical > Wiring & Sensors
A/C Support
antonch:
--- Quote from: rob@vems.co.uk on January 09, 2008, 08:46:20 am ---That's right, the pedal input is going to be controlled by one of the MiscOut triggers. And while the VEMS hardware can handle 3 inputs the software to control the A/C is not present, which is not really a problem as the solution looks a little like this:
Driver presses the A/C switch on the dash, the coil opens the circuit for the AC control which the VEMS handles based on your MiscOut settings. The exact wiring depends on the dashboard switch - if it switches to ground when on then the relay coil will need a 12v supply not the ground connection.
The choice of which EC36 pin to use will be made based on the current drawn by the AC control circuit.
--- End quote ---
Adding inputs to MiscOut would open up other possibilities to users who do not need AC. And using ECU for logical control is easier than relays. I am not too familiar with various AC configurations.
But here are some things that some ecus do:
* Raise idle
* Turn on electric fanNow these things are optional, just getting AC to work [disable/endable based on load and rpm] would be a good start. ICV algorithm should be able to cope with the changed idle speed.
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