The Accelerator Pedal Position Sensor on the Accelerator Pedal works according to the hall principal. the sensor is
integrated into the pedal lever axis. It consists of a shaft with a ring magnet. This rotates in a printed circuit board
with a stator in the fixed hall elements. This produces a change in the voltage.
The Accelerator Pedal Position Sensor is supplied with 5 volts from the PCM. The information regarding accelerator
position is supplied to the PCM by means of two voltages (pin 4: approximately 0 up to 2.25 volts and pin 5: approx-
imately 0 up to 4.5 volts).
The kickdown simulator is not used as a “Kickdown Switch”. Wide Open Throttle (WOT) recognition takes place
over the signal from the Accelerator Pedal Position Sensors pressure point, which is located in the pedal assembly.
WOT position is simulated before achieving the full load position.
CRANKSHAFT POSITION SENSOR
DESCRIPTION
The Crankshaft Position Sensor (1) is located on the left side of the engine just forward of the transmission housing.
The bottom of the sensor is positioned above the flywheel.
The sensor is a hall effect device combined with an internal magnet.
OPERATION
The Crankshaft Position Sensor generates pulses that are the signal sent to the Powertrain Control Module (PCM).
The PCM interprets the sensor signal to determine the crankshaft position. The PCM then uses this position, along
with other inputs, to determine injector sequence and ignition timing.
The Crankshaft Position Sensor detects slots cut into the engine flywheel. There are 3 sets of slots. Two sets con-
tain 4 slots and one set contains 5 slots, for a total of 13 slots. Basic timing is set by the position of the last slot in
each group. As the PCM senses the last slot, it determines which piston will be next at TDC from the Camshaft
Position Sensor input. It may take the PCM one engine revolution to determine crankshaft position.
ZH
FUEL INJECTION
14 - 33