Camshaft Position Sensor (CMP) The CMP scans a reference cam on the camshaft. The CMP sends an alternating voltage signal to the PCM. This indicates the firing position of No1 cylinder. This is only used when starting starting. after that the (PIP) signal takes over to control the injectors. Crankshaft Position Sensor (CKP) The CKP sensor is
Feb 27, 2015. Location. Salt Lake City. TDI. Jetta. Feb 28, 2015. #1. Question for anyone that knows: I have a 2010 Jetta TDI and when I plugged a computer into it it said that the crankshaft position sensor had no signal (I don't remember the exact code) so we bought a new sensor and we spent about four hours tonight looking for the oldAuthor. Posted March 19, 2013. down loaded a manual for an x-type jag, fitted with tdci engine. same information about crank setting, i.e. 50 deg before tdc, but in much more detail than the Haynes manual. I have now pulled the engine back out of the car. I will double check the valve timing first. Here is a picture from forscan. There are two things that seem dtange to me, first the crankshaft sensor is changing between synced, errod and synching. I would have thought it should show synched all the time when engine is running. But i get a good rpm signal all the time. Changed crankshaft and camshaft sensor but did not help.