Jake Posted July 21, 2007 Share Posted July 21, 2007 Still trying to get my air con working through the Motec m600. It was working fine before Dan wiped the old map from the Motec and installed his own one, so I know it's wired up correctly - I just need to get the software settings right. I hoping SimonB Or Ryan G or someone can help. In the Motec ECU Manager. Go to Adjust, Digital Input Functions, and in the submenu there are four possible Dig In choices and six Sw In choices. http://img341.imageshack.us/img341/9499/untitled1np3.th.jpg Anyone know which type I need to select? Does it matter which one I select? (can I just choose any one I like or must I get the correct one?) What if I set them all to number 5 ("Air Conditioner Request") Quote Link to comment Share on other sites More sharing options...
SimonB Posted July 21, 2007 Share Posted July 21, 2007 It depends which input on the Motec you have it wired up to. It's one of the Sw ones, mine is on Sw In 3. You set that to air conditioner request. Logic polarity on mine is set to 1, and the AT low and high levels are set to 5v and 6v respectively. As well as the input you need to set one of the outputs to the aircon clutch. Again it depends which output you've got it wired to - mine is on Aux out 2 - you set that to A/C clutch. The parameters for the A/C clutch I have set to: On throttle pos 90 Off throttle pos 95 On RPM 5500 Off RPM 5800 Recover time 2 Polarity 0 Output mode 0 I can't say for sure those settings are right because my aircon has had a leak since before the Motec went in so it's never actually been tested, but that's what Owen's set up. Quote Link to comment Share on other sites More sharing options...
Jake Posted July 21, 2007 Author Share Posted July 21, 2007 So on the Digital Input you have it set for Logic Polarity =1 but on the Aux Output it's set to Polarity 0 ? Quote Link to comment Share on other sites More sharing options...
SimonB Posted July 21, 2007 Share Posted July 21, 2007 So on the Digital Input you have it set for Logic Polarity =1 but on the Aux Output it's set to Polarity 0 ? Yep, I think that's right. When the aircon ECU wants to turn it on, it sends a voltage to the main ECU which then switches the A/C clutch line to ground. That switches the A/C clutch relay on which engages the A/C. Quote Link to comment Share on other sites More sharing options...
Jake Posted July 21, 2007 Author Share Posted July 21, 2007 What a bloody pain in the arse!!! When I view the Raw Input Values it shows 4.99v on AT3 with the AirCon off and this drops to 0.09v when the AirCon is turned on. So that confirms that it's Digital Input - Sw In 3 (AT3) that is connected as the Input - right? So I've set Sw In 3 to : Function: 5 (Air Conditioner Request) Parameter: Logic Polarity=1 Source 0 Channel 1 Lo Level 5.0v Hi Level 6.0v (Are those right?) Also I've set Aux Output4 to Function: 104 (Air Conditioner Clutch) On Throttle Pos 70 Off Throttle Pos 74 On RPM 5500 Off RPM 5800 Recover Time 2 Polarity 2 Output mode 0 but it's still not making the AirCon clutch engage. Quote Link to comment Share on other sites More sharing options...
Jake Posted July 21, 2007 Author Share Posted July 21, 2007 Simon, When your AirCon is switched on (A/C light on heater controls illuminated) and the engine is ticking over does the centre park of the AirCon compressor pulley rotate together with the out ring of the pulley? I'm presuming that's how I will be able to tell when I've finally got this working. Thanks mate Quote Link to comment Share on other sites More sharing options...
SimonB Posted July 21, 2007 Share Posted July 21, 2007 I think maybe the logic polarity should be 0 if it goes from 5v to 0v when switched on. Mine's got no gas in it, so I think it won't engage anyway. Quote Link to comment Share on other sites More sharing options...
Jake Posted July 21, 2007 Author Share Posted July 21, 2007 Right, I've looked at the wiring plug into the Motec and found that only the pins for Aux 1, Aux 2 and Aux 3 actually have a metal contact in the wiring plug. So all the other Aux outputs (Aux 4 to 8) cannot possibly work the AirCon. Aux 1 is currently assigned to "Tacho" in the Motec software Aux 2 is assigned to "Fuel Pump" Aux 3 is also assigned to "Tacho" So I'm guessing I need to change one of the outputs currently assigned to Tacho to work the AirCon Quote Link to comment Share on other sites More sharing options...
Jake Posted July 21, 2007 Author Share Posted July 21, 2007 YES!!! It's working. Well, kinda. It turns the AC clutch on and runs the AirCon nice and cold, the only problem now is that when I run the AirCon off the clutch doesn't seem to disengage Quote Link to comment Share on other sites More sharing options...
SimonB Posted July 21, 2007 Share Posted July 21, 2007 What did you do to get it working? Quote Link to comment Share on other sites More sharing options...
Jake Posted July 21, 2007 Author Share Posted July 21, 2007 Changed Aux Out3 from '4'(Tacho) to '104'(Air Conditioner Clutch) Quote Link to comment Share on other sites More sharing options...
Muffleman Posted July 21, 2007 Share Posted July 21, 2007 Blimey, sounds like a right pita - aircon nice and cool with my AEM Well, until it breaksdown ! Yeah thought I'd get in there first Quote Link to comment Share on other sites More sharing options...
Jake Posted July 21, 2007 Author Share Posted July 21, 2007 Blimey, sounds like a right pita It bloody is mate. The really annoying thing is that I've already paid Tuning Japanese to make the AC work through the Motec, which they did, but they wouldn't tell me the password to the ECU, so when Dan wiped the shitty Tuning Japanese map off we lost the AC settings too. - aircon nice and cool with my AEM Touche Matt Quote Link to comment Share on other sites More sharing options...
Homer Posted July 21, 2007 Share Posted July 21, 2007 See this is why I like my Powerfc. I just ask Ryan to "make everything work and the car go fast, safely", he does it and then I'm happy Good to hear you got it working Jake, satisfying isn't it Quote Link to comment Share on other sites More sharing options...
SimonB Posted July 21, 2007 Share Posted July 21, 2007 I think the reason its always on is the hi and low voltage settings. I'd try setting the hi one to 4 and the lo to 1 see what that does. Quote Link to comment Share on other sites More sharing options...
Jake Posted July 21, 2007 Author Share Posted July 21, 2007 Good to hear you got it working Jake, satisfying isn't it It's good fun messing about with it but it's bloody annoying when you can't figure out what settings it needs. As far as I can make out, the ECU gets sent just under 5v when the AC is supposed to be off and a little over 0v when it supposed to be working (A/C clutch engaged) ...but what it's supposed to do with that I still don't understand. Quote Link to comment Share on other sites More sharing options...
Ryan.G Posted July 21, 2007 Share Posted July 21, 2007 Hey Jake well done bud with air con Hope the help i gave u on friday made it easier sorry could not get on here sooner been at JAE all day and quickly checked pm's earlier Quote Link to comment Share on other sites More sharing options...
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