Hello, the AC clutch is not engaging when AC is turned on. I diagnosed it to the some sort of setting conflict in the S300v3. Here's what happens:
All of the wiring and has been confirmed functioning. I am able manually activate the AC clutch using the SManager in "Test Output" and by disabling the Nitrous Control/Aux1. With the current tune (attached), turning on the AC will not engage the clutch. AC pressure switch is temporary bypassed for testing. I was able to get the AC clutch to activate by changing the following setting: Parameter->Nitrous/AUX1->Function->Nitrous Control->DISABLE. However, the engine boogs at 2,000 RPM with the Nitrous control DISABLED. I've also verified the AC switch does toggle on/off in the Smanager "Sensors". I'm not to sure what to do from here to troubleshoot further. I've attached the calibration and datalog file. Any suggestions or guidance would be greatly appreciated
AC Clutch not engaging
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- Posts: 14
- Joined: Thu Mar 03, 2022 3:18 pm
AC Clutch not engaging
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Re: AC Clutch not engaging
Have you tried the ECU on a known working vehicle that has AC working?
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- Posts: 14
- Joined: Thu Mar 03, 2022 3:18 pm
Re: AC Clutch not engaging
The AC will work with this ECU if if the Nitrous function is disabled. However the engine will boog down at 2K RPM with the Nitrous function enabled. This car is an all motor vehicle with no nitrous or force induction.
Re: AC Clutch not engaging
Then why do you have the nitrous functions enabled?
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- Posts: 14
- Joined: Thu Mar 03, 2022 3:18 pm
Re: AC Clutch not engaging
I didnt tune it. It was tuned by someone else. AC was added after the fact. I only notice AC would work with Nitrous disable. Ive tried to contact thr person that setup the S300 and theyre not responding
Re: AC Clutch not engaging
You need to disable the nitrous controls
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- Posts: 14
- Joined: Thu Mar 03, 2022 3:18 pm
Re: AC Clutch not engaging
Well yes, I understand that. When I disbable the nitrous control, the engine wont rev past 2K rpm
Re: AC Clutch not engaging
The datalog you have provided does not show when this is happening.
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- Posts: 14
- Joined: Thu Mar 03, 2022 3:18 pm
Re: AC Clutch not engaging
I will get the datalogs tomorrow
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- Posts: 14
- Joined: Thu Mar 03, 2022 3:18 pm
Re: AC Clutch not engaging
I was able to resolve the issue by doing the following
Ignition in Accessory position (engine off)
Link to S300v3
Go to Nitrous/Aux 1, Function "Nitrous control", Input and change the Arming input setting to "disable", the change Function to "Disable"
Upload to S300v3
Turn ignition off, wait 10sec then start engine
The AC Clutch now works and there no more issue with revving past 2K RPM
I appreciate all the help you provided in helping me troubleshoot this issue
Ignition in Accessory position (engine off)
Link to S300v3
Go to Nitrous/Aux 1, Function "Nitrous control", Input and change the Arming input setting to "disable", the change Function to "Disable"
Upload to S300v3
Turn ignition off, wait 10sec then start engine
The AC Clutch now works and there no more issue with revving past 2K RPM
I appreciate all the help you provided in helping me troubleshoot this issue