Hyundai Santa Fe: Engine Control System / Accelerator Position Sensor (APS). Description and operation
On electronic injection systems, there is no longer a load lever that mechanically
controls the fuelling. The flow is caculated by the ECM depending on a number
of parameters, including pedal position, which is measured using a potentiometer.
The pedal sensor has two potentio-meters whoses slides are mechanically solid.
The two potentiometers are supplied from distinct and different power sources
so there is built in redundancy of information giving reliable driver's request
information. A voltage is generated across the potentiometer in the acceleration
position sensor as a function of the accelerator-pedal setting. Using a peogrammed
characteristic curve, the pedal's position is then calculated from this voltage.

Inspection
1.
Turn the ignition switch OFF.
2.
Disconnect the HO2S connector.
3...
Specification
Accelerator Position
Output Voltage (V) [Vref=5V]
APS 1
APS 2
C...
Other information:
Description
4WD ECU processes signals from various sensors and determines the current road
and driving conditions. The ECU then utilizes this information to implement
precision control over the 4WD coupling's multi-plate clutch and variably adjust
the amount of torque delivered tothe rear wheels...
Replacement
1.
Pull down the front door window glass to the lowest level by pressing
the power window glass switch.
2.
Using a screwdriver or remover, remove the front door belt outside weatherstrip
(A)...
Categories
Speedometer
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The speedometer indicates the speed of the vehicle and is calibrated in miles
per hour (MPH) and/or kilometers per hour (km/h).
Tachometer
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