• The crankshaft position signal source is a magnetic pickup sensor mounted in the right front side of the engine block.
• The sensor reacts to a trigger wheel positioned on the crankshaft. The trigger wheel is a 60 minus 2 tooth steel disk with 58 evenly spaced teeth and a slot that’s width is equivalent to removing 2 teeth (minus 2 slot) that is the SYNC gap.
• The sensor produces sine waves (converted to square waves via the ECM) for each tooth edge that breaks the magnetic field created by the permanent magnet that is in the end of the sensor.
• Crankshaft speed is derived from the frequency of the CKP sensor signal.
• Crankshaft position can be determined by the syncronization of the CMP peg signal to the CKP minus 2 slot signal.
• Diagnostic information on the CKP input signal is obtained by performing accuracy checks on frequency.
• The ECM needs both the CKP and CMP signal to calculate engine position. The CKP creates a signal that relates to
crankshaft speed and position relative to TDC (Top Dead Center). The CMP creates a signal relative to which stroke
