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COIL CAPACITORS DESCRIPTION Two coil capacitors are used. One of them is located near the center of, and on the left side of the OPERATION The 2 coil capacitors are used to prevent high-volt- age spikes from interfering with the operation of cer- CRANKSHAFT POSITION SENSOR—4.0L DESCRIPTION The Crankshaft Position Sensor (CKP) is mounted to the transmission bellhousing at the left/rear side OPERATION Engine speed and crankshaft position are provided through the crankshaft position sensor. The sensor The sensor is a hall effect device combined with an internal magnet. It is also sensitive to steel within a On 4.0L 6-cylinder engines, the flywheel/drive plate has 3 sets of four notches at its outer edge (Fig. The notches cause a pulse to be generated when they pass under the sensor. The pulses are the input The trailing edge of the fourth notch, which causes the pulse, is four degrees before top dead center The engine will not operate if the PCM does not receive a crankshaft position sensor input. Fig. 5 Coil Capacitor (Left Side Shown) 1 – ELECTRICAL CONNECTOR Fig. 6 CKP Sensor Location—4.0L 6-Cyl. Engine 1 – SLOTTED HOLE 8D - 4 IGNITION SYSTEM WJ DESCRIPTION AND OPERATION (Continued) |