General Information

The following is a list of ignition system components and their functions.

24X CKP Sensor And Interrupter Ring:

24X CKP Sensor and Interrupter Ring
The 24X (CKP) sensor (1), secured in a mounting bracket (3) and bolted to the front side of the engine timing chain cover (2), is partially behind the crankshaft balancer. The crankshaft balancer contains the 24x CKP sensor interrupter ring.

The 24x CKP sensor contains a hall-effect switch. A hall - effect switch is a solid state switching device, which produces an OFF-ON pulse when a rotating element passes between the sensor tip and a magnet. This rotating element is called an interrupter ring. In this case the interrupter ring has 24 evenly spaced blades and windows. This sensor produces 24 ON-OFF signal pulses per crankshaft revolution. The 24x signal is used for enhanced smoothness and idle stability at a lower calibrated RPM. The 24x signal is known as the medium resolution engine speed signal.

7X CKP Sensor:

7X CKP Sensor
The 7X (CKP) sensor is bolted into the center of the engine block and protrudes into the crankcase. The 7x CKP sensor reluctor wheel is cast into the crankshaft.

The 7x CKP sensor is a variable reluctance sensor. The magnetic field of the sensor is altered by a reluctor wheel that has seven machined slots, six of which are equally spaced 60 degrees apart. The seventh slot is spaced 10 degrees from one of the other slots. The 7x CKP sensor produces six pulses and one sync pulse for each revolution of the crankshaft. This signal must be present for the IC module to send a 3x reference signal to the PCM. The 3x reference is known as the low resolution engine speed signal.