Ford Galaxy strange CAM waveform

Droidkiller · Post by **Droidkiller** » Fri Jun 12, 2020 4:27 am

Hi all,what do you think about this CAM pattern?Ford Galaxy 1.9 PDTDI AUY engine code.Measured idle,900 rpm,car runs fine,no DTC.Only wanted to save file to my database.
As you can measure rpm(900) from crank frequency,crank has the missing teeths every 360,thats clear,but check please how many times turns the crank until the whole CAM signal repeats itself.

Droidkiller · Post by **Droidkiller** » Fri Jun 12, 2020 4:43 am

Droidkiller wrote: ↑
Fri Jun 12, 2020 4:27 am
Hi all,what do you think about this CAM pattern?Ford Galaxy 1.9 PDTDI AUY engine code.Measured idle,900 rpm,car runs fine,no DTC.Only wanted to save file to my database.
As you can measure rpm(900) from crank frequency,crank has the missing teeths every 360,thats clear,but check please how many times turns the crank until the whole CAM signal repeats itself.

vasek · Post by **vasek** » Fri Jun 12, 2020 8:50 am

Hi.
A faulty camshaft sensor reads the reference signal with an error.
The position of the TDC of the fourth cylinder determines a single narrow pulse.
The position of the TDC of the third cylinder is determined by two narrow pulses with a minimum gap.
Here is the correct signal :

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