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:
Inspection
1.
Turn the ignition switch OFF.
2.
Disconnect the intake actuator connector.
3.
Verify that the intake actuator operates to the fresh air position when
connecting 12V to terminal 3 and grounding terminal 7...
Inspection
Inspection Item
•
Battery efficiency inspection
•
Battery voltage inspection
•
Charging voltage insptection
•
General inspection
•
Terminal tightening state inspection
•
Engine/ transaxle ground state inspection
•
Wiring harness ground state inspection
•
Electrical Specified Value Inspection
•
Vehicle parasitic current inspection
•
Battery capacity inspection
Battery Efficiency Inspection
•
Check that the battery cables are connected to the correct terminals...
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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