Kiwi Dave
05-23-2021, 12:13 PM
Hi All
It's getting warm and, although it will do me zero good in my go cart, it reminds me to charge my A/C and see if everything is working.
I charged it up with the prescribed amount of R134a, the compressor kicks in as it's supposed to and I get cold air.
Next, there's the question of getting the fans to run as the Vintage Air system runs independently of the ECU. Lawson (Isfourwheeler) told me that there's a trigger wire that can be run to the ECU that starts up both fans and ups the idle speed when the a/c compressor is on. This can be teed into the compressor trigger wire from the trinary switch. Brian from iWire kindly sent me a wire to do this. With my 2007 manual a/c setup Brian confirmed that it goes into pin C24 (FYI - the FSM has this incorrectly identified in one diagram on page WI 90 as C23. It should be C24). I get +12V to it when I turn on the a/c but the fans don't run and the idle is not increased.
One thing I thought of that is also now different than the OEM a/c setup is the outside temperature sensor is not hooked up (not supported by standard iWire harness). Does the ECU need to know it is above freezing to run the a/c and therefore the fans?
Has anyone else successfully done this? What am I missing?
Otherwise, I'll wire up the fans through relays triggered by that wire.
Cheers
Dave
It's getting warm and, although it will do me zero good in my go cart, it reminds me to charge my A/C and see if everything is working.
I charged it up with the prescribed amount of R134a, the compressor kicks in as it's supposed to and I get cold air.
Next, there's the question of getting the fans to run as the Vintage Air system runs independently of the ECU. Lawson (Isfourwheeler) told me that there's a trigger wire that can be run to the ECU that starts up both fans and ups the idle speed when the a/c compressor is on. This can be teed into the compressor trigger wire from the trinary switch. Brian from iWire kindly sent me a wire to do this. With my 2007 manual a/c setup Brian confirmed that it goes into pin C24 (FYI - the FSM has this incorrectly identified in one diagram on page WI 90 as C23. It should be C24). I get +12V to it when I turn on the a/c but the fans don't run and the idle is not increased.
One thing I thought of that is also now different than the OEM a/c setup is the outside temperature sensor is not hooked up (not supported by standard iWire harness). Does the ECU need to know it is above freezing to run the a/c and therefore the fans?
Has anyone else successfully done this? What am I missing?
Otherwise, I'll wire up the fans through relays triggered by that wire.
Cheers
Dave