Simon_s13 Posted December 13, 2022 Report Share Posted December 13, 2022 Idle solenoid Hi, I have set up the idle control valve in my car using the AUX 8 on my link g4+ Storm. The idle valve is the ford version like the image. After selecting on the PClink on the AUX 8 ISC solenoid with 100 hz of frequency I went to idle speed control menu I chose open loop sol/stepper unipolar (6 terminal). The solenoid has only 2 terminals, I have also added a diode between both terminals on the solenoid side. The solenoid is mounted on the chassis. When I’m switching the ignition on it does make a noise as long as the fuel pump is priming, is it normal? The fuel pump does prime before the engine starts but why is the idle solenoid also doing it? I probably did something wrong, could anyone tell me if I have done any step wrong on my installation? Thanks in advance Quote Link to comment Share on other sites More sharing options...
Adamw Posted December 13, 2022 Report Share Posted December 13, 2022 You dont need a diode. You didnt mention what the idle valve terminals have been connected to? If you set aux 8 to "test PWM" and set the frequency to 10Hz, do you hear the valve clicking? Quote Link to comment Share on other sites More sharing options...
Simon_s13 Posted December 14, 2022 Author Report Share Posted December 14, 2022 Thanks Adam, I connected one terminal to aux 8 and the other one to 12V positive Should I remove the diode? I will try to do the PWM test and I will let you know I didn’t actually try it. Quote Link to comment Share on other sites More sharing options...
Adamw Posted December 14, 2022 Report Share Posted December 14, 2022 3 hours ago, Simon_s13 said: Should I remove the diode? Yes. 3 hours ago, Simon_s13 said: I connected one terminal to aux 8 and the other one to 12V positive Is the 12V supply from an ignition switched source? Quote Link to comment Share on other sites More sharing options...
Simon_s13 Posted December 15, 2022 Author Report Share Posted December 15, 2022 14 hours ago, Adamw said: Is the 12V supply from an ignition switched source? Yes, it is powered by the PMU once the ignition is on, it also powers up the ethanol content sensor(it is not connected yet) I will remove the diode and do the PWM test on Saturday will let you know the results. Quote Link to comment Share on other sites More sharing options...
Simon_s13 Posted December 21, 2022 Author Report Share Posted December 21, 2022 I did the PWM test and it does work fine, as you can hear on the videos the idle valve is priming as the fuel pump when the ignition is on. The diode was removed before the videos, it does actually the same with and without diode. The fuel pump stops just before the idle valve. https://youtu.be/DsAuAXgMncU https://youtu.be/s9O9tbAywGo noise.pclr Quote Link to comment Share on other sites More sharing options...
Adamw Posted December 21, 2022 Report Share Posted December 21, 2022 I would say you have something funny going on with the main power supply to the ECU (pin A5), possibly missing altogether or maybe just delayed (ie goes live sometime after the idle valve power supply). The buzzing is due to having 12V on the idle valve coil when the ecu is not powered up - the ecu is only powering up due to 12V flowing into aux 8 from the idle valve supply. When the buzzing stops is likely when the ecu is actually getting its proper power supply on A5. So you need to look at that A5 supply circuit, I guess it could be a delay setting on the PDM output, or there is something weird about the wiring to pin A5. Quote Link to comment Share on other sites More sharing options...
Simon_s13 Posted December 22, 2022 Author Report Share Posted December 22, 2022 If there is only positive going through the valve before the ecu is powered up it should make a single “click” noise, depending on the frequency written on the ecu the noise changes so it means then the ecu has got power and it is activating the idle valve. Also the engine starts and the fuel pump is priming at the same time as the idle valve is making the noise before I start the engine.. The Idle valve and the ecu have a different power feed but same time activation. I haven’t adjusted the idle control yet in case the ecu gets damaged. I have tried once to start the engine with the idle valve activated and connected and it seems to work, when the engine is running I can hear it working. Quote Link to comment Share on other sites More sharing options...
Adamw Posted December 22, 2022 Report Share Posted December 22, 2022 The ECU doesnt activate the idle valve aux until the engine is doing over 400RPM. At least it doesnt in al the firmwares im familiar with. You are running a very old firmware so it wouldnt hurt to update that to the latest. If you unplug all devices connected to aux outputs, does the blue led come on instantly when you switch on ign? Quote Link to comment Share on other sites More sharing options...
Simon_s13 Posted February 14, 2023 Author Report Share Posted February 14, 2023 it works at it should be after the software update, Thanks Adam Quote Link to comment Share on other sites More sharing options...
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