2005 Impala Crank Sensor Code P0355 From A Shorted Cam Sensor

What do you do when the flow chart leads you to engine computer replacement? Think outside the box! This case study emphasizes why I think manufacturer flow charts are misleading, and shows what tests you can do to avoid replacing a computer for nothing. Engine Performance Diagnostics chapter 21 Symptoms - check engine light (P0335, P0520) - long crank time - starting fluid required to start, especially cold Fix - repaired camshaft position sensor wiring - replaced the camshaft position sensor Tests shown - understanding GM 7X and 24X crankshaft position sensors - how to test a three wire pull-up hall effect sensor and wiring - how to perform a short to ground test with a ohm meter - using a wiring diagram to identify computer power and ground circuits - understanding internally sourced/externally separate PCM voltage feed circuits - how to disassemble a camshaft position sensor connector and repair bare wires Tools used - scan tool - lab scope - heat shrink/electrical tape/conduit Playlist - (Chapter 21) Ignition inputs, cam and crank sensors https://www.youtube.com/playlist?list=PLAFYVCyenqcqEN41aYznWn9Nfhy1PiMjo Related videos - Hall effect cam/crank sensor operation and testing Part 1 (an SD Premium video) https://youtu.be/fPkZCJgtUko - Bad Engine Computer Testing Part 1 https://youtu.be/hJQ6qnhTgdg - No Start from a shorted MAP sensor (Honda, Acura) https://youtu.be/za13UnpbH7E - How to test an electronic EGR valve (GM P1406 case study) https://youtu.be/te_kapz-fj4 For more information on this topic, I have written a “field manual” called Engine Performance Diagnostics which is available at www.scannerdanner.com as an eBook or paper book. Want even more diagnostic training? Whether you are a DIY trying to fix your own car, someone looking to become an auto technician, or a current auto technician that wants to get more into diagnostics, subscribe to ScannerDanner Premium right here on YouTube. There is a 14 day free trial. On ScannerDanner Premium I will bring you right into my classroom at Rosedale Technical College. You will find page for page lectures taken right from my book as well as exclusive classroom type case studies. What is so special about these classroom case studies? I pull live problem vehicles directly into my classroom and we troubleshoot them in real time, using and applying the theory and testing procedures we learn during the classroom lectures. There is no better on-line training of how to troubleshoot automotive electrical and electronics systems anywhere!

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How to test a GM 3-wire crank sensor (hall effect type)
The tests shown in this video can be used for any 3-wire cam or crank sensor. The P0336 code was caused by the crank sensor connector being left unplugged. So rather than just plug the sensor back in and clear the codes, I decided to take this opportunity to show you how to test the crank sensor circuit on this car. (1996 GM 3100) There are two crank sensors on these early GM 3100 engines. One is a 2-wire magnetic type sensor that GM calls a 7x crank sensor. (7 pulses per 360 degrees of crank rotation). The second is a 3-wire hall effect type sensor that GM calls a 24x crank sensor (24 pulses per 360 degrees of crank rotation). This is the one we will be focusing on for this video. Symptoms: - Check engine light (P0336) Fix: - reconnect sensor connector Testing methods shown: - how to verify wiring integrity on a pull-up type hall effect using a test light and scan data - how to determine hall effect circuit design (pull-up or pull-down) which is critical in knowing how to perform a proper bypass test - how to perform a hall-effect bypass test - how to check powers and grounds to a hall effect - what does a digital square wave signal look like on a digital voltmeter - a frequency graph compared to the actual signature of the waveform Tools used: - Snap on Vantage Pro - Incandescent test light - Solus Pro Related Videos: Hall effect sensor testing Part 1 - a free ScannerDanner Premium video https://youtu.be/fPkZCJgtUko Hall effect sensor testing Part 2 - a free ScannerDanner Premium video https://youtu.be/BJp2uVXzUqs GM 3800 crank sensor test https://youtu.be/jACyNHl_L1g For more information on this topic, I have written a “field manual” called Engine Performance Diagnostics which is available at www.scannerdanner.com as an eBook or paper book. Want even more diagnostic training? Whether you are a DIY trying to fix your own car, someone looking to become an auto technician, or a current auto technician that wants to get more into diagnostics, subscribe to ScannerDanner Premium right here on YouTube. There is a 14 day free trial. On ScannerDanner Premium I will bring you right into my classroom at Rosedale Technical College. You will find page for page lectures taken right from my book as well as exclusive classroom type case studies. What is so special about these classroom case studies? I pull live problem vehicles directly into my classroom and we troubleshoot them in real time, using and applying the theory and testing procedures we learn during the classroom lectures. There is no better on-line training of how to troubleshoot automotive electrical and electronics systems anywhere! Playlists: (Chapter 21) Ignition inputs, cam and crank https://www.youtube.com/playlist?list=PLAFYVCyenqcqEN41aYznWn9Nfhy1PiMjo (Chapter 2) Switch Inputs, digital signals, module communication, hall effect testing https://www.youtube.com/playlist?list=PL3EF7B78BEDFA6101





No Start, No Spark, No Injector Pulse (faulty crank sensor)
1997 Lincoln Continental 4.6 How to test a VR type crank sensor. (VRS) This is a great video if you are looking for tips on finding direction on any no spark problem. Tools used - Thexton Spark Tester https://www.jbtoolsales.com/thexton-404-ignition-spark-tester#oid=1014_1 - OTC 3633 Mini Circuit Tester https://www.jbtoolsales.com/otc-3633-mini-circuit-tester#oid=1014_1 - AES' Electronics Accupuncture Probes http://www.aeswave.com/cart.php?m=affiliate_go&affiliateID=60df1b5cf6e5582a f6ff81c728f42d0d&go=http://www.aeswave.com/AES-Electronics-Accupuncture-Pro bes-p9474.html - uScope Master Kit 1-channel automotive scope http://www.aeswave.com/cart.php?m=affiliate_go&affiliateID=60df1b5cf6e5582a f6ff81c728f42d0d&go=http://www.aeswave.com/uScope-Master-Kit-1-channel-auto motive-scope-p9273.html For more information on this topic, I have written a “field manual” called Engine Performance Diagnostics which is available at www.scannerdanner.com as an eBook or paper book. Want even more diagnostic training? Whether you are a DIY trying to fix your own car, someone looking to become an auto technician, or a current auto technician that wants to get more into diagnostics, subscribe to ScannerDanner Premium right here on YouTube. There is a 14 day free trial. On ScannerDanner Premium I will bring you right into my classroom at Rosedale Technical College. You will find page for page lectures taken right from my book as well as exclusive classroom type case studies. What is so special about these classroom case studies? I pull live problem vehicles directly into my classroom and we troubleshoot them in real time, using and applying the theory and testing procedures we learn during the classroom lectures. There is no better on-line training of how to troubleshoot automotive electrical and electronics systems anywhere!





Misfire caused by a misadjusted crank sensor (rubbing on flywheel)
Here, we’re diagnosing an intermittent misfire symptom, caused by an excessive crankshaft position sensor air gap. “Trash in, trash out” is how the saying goes, and this video is a perfect example. I’m also demonstrating the power of a lab scope, and the importance of verifying signal inputs before replacing parts. Engine Performance Diagnostics chapter 21 page 20 Symptoms - intermittent misfire - no codes present Fix - adjust crankshaft position sensor air gap Tests shown - using an in-line spark tester to check for an ignition system issue - checking an ignition coil primary current waveform with a lab scope and low amp probe - checking camshaft and crankshaft position sensor waveforms for faults - checking an ignition coil control signal (transistor external of the PCM) - manually checking a crankshaft position sensor air gap Tools used - in-line spark tester - Picoscope automotive 4 channel lab scope - inductive low amp probe Playlist - (Chapter 21) Ignition inputs, cam and crank sensor https://www.youtube.com/playlist?list=PLAFYVCyenqcqEN41aYznWn9Nfhy1PiMjo Related videos - Hall effect cam/crank sensor operation and testing Part 1 (an SD Premium video) https://youtu.be/fPkZCJgtUko - Hall effect cam/crank sensor operation and testing Part 2 (an SD Premium video) https://youtu.be/BJp2uVXzUqs - How to test a crank sensor (Chrysler Dodge Jeep) https://youtu.be/YtpDi2vnGog - Faulty cam sensor setting a crank sensor code - P1389, P0320, P0622 https://youtu.be/VrsI1xCoZ8M For more information on this topic, I have written a “field manual” called Engine Performance Diagnostics which is available at www.scannerdanner.com as an eBook or paper book. Want even more diagnostic training? Whether you are a DIY trying to fix your own car, someone looking to become an auto technician, or a current auto technician that wants to get more into diagnostics, subscribe to ScannerDanner Premium right here on YouTube. There is a 14 day free trial. On ScannerDanner Premium I will bring you right into my classroom at Rosedale Technical College. You will find page for page lectures taken right from my book as well as exclusive classroom type case studies. What is so special about these classroom case studies? I pull live problem vehicles directly into my classroom and we troubleshoot them in real time, using and applying the theory and testing procedures we learn during the classroom lectures. There is no better on-line training of how to troubleshoot automotive electrical and electronics systems anywhere!





Impala crank sensor P0336 code
This short clip provides some insight for those who have gotten a P0336 diagnostic code, it shows the basic amount of mechanic skills required to preform this repair yourself with some mechanical ability.




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