Combination Sensor (3.3L)

The combination cam/crank sensor actually consists of 2 Hall Effect sensors mounted, in a single unit, near the harmonic balancer. Since the 3.3L engine uses a double-fire simultaneous injection system rather than a sequential fuel injection system, it does not require a distinctive (TDC No. 1 piston compression) camshaft signal. Instead, each engine revolution, camshaft portion of the combination sensor generates a TDC signal for the No. 1/4 cylinder pair. Each engine revolution, the second sensor (crankshaft) generates RPM information and signals for the 1/4, 2/5 and 3/6 cylinder pairs.