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:
Replacement
•
Put on gloves to prevent hand injuries.
•
When removing with a flat-tip screwdriver or remover, wrap protective
tape around the tools to prevent damage to components...
Troubleshooting
1.
Part diagnosis
Items
Cause
Symptom
Switch fuse
Faulty fuse connection, Damaged fuse
–
DTC Code : P0504
–
Symptom : Shifting gear trouble, Starting failure, Cruise
control function cancelation trouble, EPB function cancelation
trouble, Stop lamp lighting trouble, ESP OFF light illuminated...
Categories
Speedometer
.png)
The speedometer indicates the speed of the vehicle and is calibrated in miles
per hour (MPH) and/or kilometers per hour (km/h).
Tachometer
.png)
read more