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Video instructions and help with filling out and completing Who Form 944 Pr Requirements

Instructions and Help about Who Form 944 Pr Requirements

Today, we're going to show you how to test the RPM sensor and the top dead center sensor for a 1988 944 turbo. This will also work for early 944s, late 44s, and the 911 3.2 Carrera. The first thing we're going to do is gently peel back the carpet. It should be held by Velcro. Next, you'll see a wooden kick board with four Phillips head screws, which I've already removed. Just go ahead and gently pull that out and set it aside. Now, located just underneath the dash, you're going to see the DME harness, which we will gently pry the metal prong away towards the door and lift out by the plastic housing. Be careful not to lift by the wires and damage the harness. Now that the wiring harness has been removed, we'll set our multimeter to test the RPM sensor. Set your multimeter to the ohm setting and then locate pins 8 and 27 on the harness. Polarity won't matter in this case. Acceptable resistance ranges should be from 600 to 1600 ohms. As you can see, we read at about 1100 ohms. Now we're going to test our top dead center reference sensor. In this case, we locate pins 25 and 26. Again, acceptable resistance ranges should be between 600 to 1600 ohms. Here we reflect 1100 ohms. Now we're going to do a dynamic test to measure the AC voltage produced by the RPM sensor. First, set your multimeter to AC volt. Then locate pin 8 and 27 again. Before doing this test, it's a great idea to make sure that your battery is fully charged, that you're in park or neutral, and that your handbrake is fully engaged. Now, when you crank the vehicle, you should see over 1 volt. As you...