General Information
Component Location
General Description
The Electronic Throttle Control (ETC) system is made of the components throttle body, Throttle Position Sensor (TPS) 1&2 and Accelerator Position Sensor (APS) 1&2. The throttle body contains the actuator, the throttle plate and the throttle position sensor (potentiometer), which are integrated in one housing. The actuator consists of a DC motor with a two-stage gear. The opening angle of the throttle valve is detected by the throttle position sensor which is mounted on the throttle body. And it provides feedback to the ECM to control the throttle motor in order to control the throttle valve opening angle properly in response to the driving condition.
DTC Description
CASE 1 : If the deviation between the set throttle position and the actual throttle position is bigger than the threshold value, ECM sets DTC P2118.
CASE 2 : If the ETC motor control duty is over 80% over 0.6 sec., ECM sets DTC P2118.
(In these cases, ECM judges throttle sticking).
DTC Detecting Condition
Diagnostic Circuit Diagram
Signal Waveform & Data
Fig 1) Normal waveform of ETC motor & TPS1 at idle.
Fig 2) Normal waveform of ETC motor & TPS1 with deceleration.