Davecrx Posted November 17, 2010 Share Posted November 17, 2010 Hi Cut a long story short I've got the pwm valve all wired up and everything seems to be setup correct in the MS but the valve is always fully open when the ignition is on. I've changed all the settings in MS but nothing makes it close. So is there anyway to test that the pin 30 is doing what it is meant to do and not just letting current pass straight to ground. Thanks Dave Quote Link to comment Share on other sites More sharing options...
Dave W Posted November 17, 2010 Share Posted November 17, 2010 If you put a volt meter between your PWM output and battery +ve you should see the voltage vary depending on the current PWM setting. If it's measuring 12v (or battery voltage anyway) then it's on solid. One thing you should be aware of though that may be confusing at first, the PWM on some versions of MS1-Extra doesn't actually do anything until the engine is cranking or running. If you just turn the ignition on you won't get anything meaningful from the PWM. Once it starts getting ignition events it will start issuing a correct(ish) PWM signal. If you're using indirect trigger events (EDIS for example) you may find you won't get anything until it's cranked over a couple of rotations. Quote Link to comment Share on other sites More sharing options...
Davecrx Posted November 17, 2010 Author Share Posted November 17, 2010 If you put a volt meter between your PWM output and battery +ve you should see the voltage vary depending on the current PWM setting. If it's measuring 12v (or battery voltage anyway) then it's on solid. One thing you should be aware of though that may be confusing at first, the PWM on some versions of MS1-Extra doesn't actually do anything until the engine is cranking or running. If you just turn the ignition on you won't get anything meaningful from the PWM. Once it starts getting ignition events it will start issuing a correct(ish) PWM signal. If you're using indirect trigger events (EDIS for example) you may find you won't get anything until it's cranked over a couple of rotations. Well i tested it with my meter and yes it showed 12 volts. And just to clear up the valve is fully open as soon as i turn the ignition on, the engine is cranking, on warm-up and when the engine is at running temp. Quote Link to comment Share on other sites More sharing options...
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