How to check your crankshaft position sensor on a BMW 740 (e38)

Here I show how to test the crankshaft and camshaft position sensors on a BMW 740i by measuring their coil resistances. You should measure around 500 ohms across the coil pins of the crankshaft position sensor, and roughly 1,000 ohms on the camshaft position sensor coil. Your E38 will not start unless the DME sees the proper pulse train from the crankshaft position sensor. The symptoms will be identical to a bad fuel pump. This is a safety measure to ensure that the fuel being pumped is actually being burned, (inside the cylinders) and not spilling out on the ground after a bad collision, for example. I should add, as youtuber "Hueristic" pointed out, that this is only for the 95, the Crank position sensor on later models is in a different location near the transmission. You need to get to it from´╗┐ underneath. For more info and pics see the following link:

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Crank Sensor Quick Fix
GET SOFTWARE HERE: Crank Sensor Quick-Fix There are two types of crank sensors, and two types of tests, the 2 and 3 wire sensors. Here are the flash points for the crank sensor testing. 1) The 2 wire crank sensor generates a voltage, and is quick tested with a test light. 2) To test the two wire sensor, disconnect the crank sensor, ignition key on, hook the test light to battery power, and tap at each crank sensor terminal repeatedly. A spark click and injector pulse should be seen. 3) The 3 wire sensor has its own circuit, with 5 to 8 volt power, ground, and signal wires. Identify the signal wire using volt meter or diagram. 4) Take the test light and connect to battery ground. With key on, disconnect crank sensor, and repeatedly tap on the signal wire. You should hear a spark click and injector noid pulse. These are to test the ECM crank sensor circuit response. On both tests, you should see a spark click and injector pulse. Crank sensor is the main input to the ECM. If ECM working, then the crank is the only other issue. There are other ways to test, but involve an oscilloscope and more complex. This concludes the cranks sensor Quick-Fix.

How to Test Crankshaft and Camshaft sensors 1
How to Test Crankshaft and Camshaft sensors 1 Amazon Printed Books Amazon Kindle Edition 52YFOCI/ref=sr_1_2?s=digital-text&ie=UTF8&qid=1360016628&sr=1-2&keywords=se nsor+testing%2C+mandy+concepcion Android APPs Z&feature=search_result#?t=W251bGwsMSwxLDEsImNvbS5hcHAuYm9vay5BT1RMVkVXSVdQ WEFYWUdNWiJd Shows the operation and testing procedures of automotive cam and crk sensors, which supply the ECM with engine camshaft and crankshaft position. These two signals are essential for the engine to run. (note: We allow all schools and training institutions to use our software free of charge, so long as it is not sold to others. You're encouraged to download our free automotive simulation software for more information. *************************************************************************** ********* Amazon Printed-Books & Kindle: d-keywords=mandy+concepcion Google Play Android APPs: Amazon Video DVDs: -keywords=mandy+concepcion Barnes & Noble Nook: tore=allproducts Apple iTunes iPad:

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BMW E38 M62 and M62TU possible solutions for non start or bad idle
A few things you can try before having the car towed if the engine will not start or not idle and die after a few seconds and don't have a code ready handy