Concorde V6-2.7L VIN R (1998)
Crankshaft Position Sensor: Description and Operation
Fig 9 Timing Slots
CRANKSHAFT POSITION SENSOR
The crankshaft position sensor detects slots cut into the transmission driveplate extension. There are 3 sets of slots. Two sets contain 4 slots and
one set contains 5 slots, for a total of 13 slots (Fig. 9). Basic timing is set by the position of the last slot in each group. Once the Powertrain
Control Module (PCM) senses the last slot, it determines crankshaft position (which piston will next be at TDC) from the camshaft position sensor
input. It may take the PCM one engine revolution to determine crankshaft position.
The PCM uses crankshaft position reference to determine injector sequence and ignition timing.
Once the PCM determines crankshaft position, it begins energizing the injectors and coils in sequence.
Fig 10 Crankshaft Position Sensor Location
The crankshaft sensor is located on the passengers side of the transmission housing, above the differential housing (Fig. 10). The bottom of the
sensor is positioned next to the drive plate.
