The Crankshaft Position (CKP) sensor detects the crank angle of each cylinder. It converts that angle into a pulse signal. The PCM uses this signal to calculate engine speed. It also uses it to control the fuel injector and ignition timing. Testing the CKP sensor requires special tools that are expensive and thus impractical for do-it-yourself mechanics but can be monitored with a scan tool that offers a data display or stream information. The CKP sensor's removal and installation location within the distributor is identified for the 2.0L SOHC and 1990-96 1.5L engines. The 1.6L and 2.0L DOHC engines disconnects the negative battery cable. Then, remove the electrical throttle body stay and the sensor retaining screws and take out the sensor assembly. The installation process follows the reverse order. Then, reconnect the battery cable. For the 1.8L, 2.4L, 3.0L (SOHC and DOHC), 3.5L and 1997-00 1.5L engines, the procedure starts off by unfastening the negative battery cable and removing the timing belt. Next unplug the sensor connector and unfasten the retaining bolts. Just reverse the steps to install.