For ease of removal on the Series 60, we chose the crankshaft position sensor. It is simply bolted to the bottom of the block and works by creating a magnetic field as the crankshaft gear turns, sending voltage signals back to the ECM. A missing tooth is used to tell the ECM engine position.
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| Crankshaft position sensor prior to removal. |
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| Crankshaft position sensor after removal. |
My reflection:
We did not get to test this sensor yet, however it can be tested by putting a multimeter across the electrical terminals and reading voltage as a magnet is passed over it. Failure of this sensor could result in a cranking, no-start condition.
Worth noting on this sensor was how difficult it was to remove due to the fact that the O-ring had swelled up. It took a fair bit of prying and pulling to get this thing out of the engine. Just another testament to the fact that when working with vehicles... it's hardly ever as simple and straight-forward as the textbook says!
Excellent post, Erik! As this blog posting is all about, "getting a job," you have "hit the nail" on the head!
ReplyDeleteErik, keep an eye out for students from Bellingham Technical College posting comments on your blogs. We will be doing the same after the break.
Hi Erik,
ReplyDeleteYou have a nice blog going here!
The things I remember about the Series 60 TRS (Timing Reference Sensor) and SRS (Synchronous Reference Sensor) is that it takes both sensors functioning to start, but may run with only one. I wonder which one sensor that is? ;)
Regards,
Jeff Curtis
Mr. Curtis, I think you are correct. The service literature recommends checking both sensors with a scan tool for a cranking, no-start condition. This is done first with a scan tool with the data stream to determine if the ECM is receiving a signal (and that it is the correct signal), and measuring resistance at the ECM wiring harness on the appropriate terminals.
DeleteI cannot specifically find anything regarding what you mentioned about being able to run with only one of these sensors, however I believe that would be the TRS and applies to both automotive and heavy truck applications. I will bring this up in class on Tuesday and delve back into the service information to find a definitive answer to that question!