Will bad crank sensor cause no spark?
A bad Crankshaft Position sensor is a common cause of no starts. The signal from this sensor goes to the PCM or ignition module that switches the ignition coil(s) on and off. In ignition systems with a single coil and distributor, a bad coil or a cracked distributor cap or rotor can prevent the spark plugs from firing.
What does the crankshaft position sensor signal do?
Since the Crankshaft Position Sensor Signal triggers the Ignition Module (or Fuel Injection Computer) to start switching the Ignition Coil Primary Current ground path On and Off… I usually refer to the sensor’s signal as the Triggering Signal.
Can you replace a faulty crankshaft position sensor?
By following the guidelines above, you will be able to successfully replace a faulty crankshaft position sensor. However, if you are not comfortable doing the work yourself, a certified technician, like one from YourMechanic, can complete the crankshaft position sensor replacement for you.
What is the crankshaft signal on a GM Gen III engine?
The Gen III PCM (GM#† 12200411) was also used with the 2001ñ2002 Gen I small-block and Vortec V-6 engines. While these engines are fitted with a low-resolution crankshaft signal, the crankshaft sensor principle is the same: a digital ON/OFF signal represents crankshaft location.
What do you need to know about Crank and cam sensors?
You’ve covered a lot of information so far, in this section I’ll get into the basic flow of tests that are part of diagnosing the crankshaft position sensor (and camshaft position sensor). Testing the crankshaft position sensors or camshaft position sensors requires that you test them in action, that is with the engine cranking.
Since the Crankshaft Position Sensor Signal triggers the Ignition Module (or Fuel Injection Computer) to start switching the Ignition Coil Primary Current ground path On and Off… I usually refer to the sensor’s signal as the Triggering Signal.
The Gen III PCM (GM#† 12200411) was also used with the 2001ñ2002 Gen I small-block and Vortec V-6 engines. While these engines are fitted with a low-resolution crankshaft signal, the crankshaft sensor principle is the same: a digital ON/OFF signal represents crankshaft location.
How does a crankshaft position sensor work in an ECU?
That produces a pattern of on and off switches in the Hall Sensor that the ECU can interpret as the crankshaft speed. The faster the sensor is turning on and off, the faster the crankshaft is spinning. While these Hall effect sensors give a digital signal, some crankshaft position sensors produce an analog signal.
You’ve covered a lot of information so far, in this section I’ll get into the basic flow of tests that are part of diagnosing the crankshaft position sensor (and camshaft position sensor). Testing the crankshaft position sensors or camshaft position sensors requires that you test them in action, that is with the engine cranking.