APS(Acceleration Position Sensor) is measuring the driver’s acceleration using a potentiometer and APS signal is transmitted to the ECM. The pedal’s position is calculated from the voltage of potentiometer in the APS. The absence of a mechanical link between the accelertor pedal and injection system presents a risk of loss of control of the engine in the event of a failure of the component in the charge of providing the driver’s request information to the injection system. APS therefore has the two potentiometers whose slides are mechanically solid. APS 2 is for plausibility of load request signal and decide whether or not APS 1 & 2 is defective.
If the APS output siginal is greater than 4.9V during two driving cycles, this code will be set. and the Malfunction Indicator Light (MIL)will be turned on. If the ECM is reading an uncharacteristic APS supply voltage as compared to the APS position and engine load during driving cycles,this code will be set and the Malfunction Indicator Light (MIL) will be turned on.
DTC NO. | Detecting Condition | Possible Cause |
C 002 C 003 C 004 | ● C 002 : Output signal > 2.46 V ● C 003 : Error is recognized unless the sensor supply voltage is from 4.7 to 5.1V ● C 004 : Error is recognized ① If |APS 1 - APS 2| is above 1.232 ㎷ when the APS1 and APS2 signal is below 1.2% ② If |APS 1 - APS 2| is above 308 ㎷ when the APS1 APS2 signal is from 1.8 % to 1.6% ③ If |APS 1 - APS 2| is above 406 ㎷ when the APS1 and APS2 signal is above 7 % ● Engine Condition : IG ON ● Fuel Limit : YES ● Fuel Cut : NO ● MIL : YES ●LIMP HOME MODE ① Engine speed is fixed as 1200 rpm without pedal sensor action ② Engine performance is reduced ③ Air conditioning system is deactivited as against the vehicle speed and the engine rpm ④ Cruise control system inhibited | ● Open or short in circuit ● APS ● ECM |
APS 1 | Normal Parameter | |
Accel pedal position | Idle Position (0%) | Fully Open Position (100%) |
Signal votage | 0.2 ~ 0.5 V | 1.6 ~ 2.5 V |
