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.
ECM sets DTC P2101 if ECM detects open or short to ground in ETC motor control circuit.
Item | Detecting Condition | Possible cause |
DTC Strategy |
•
Power Stage Check |
•
Throttle stuck
•
Open in motor circuit
•
Faulty motor
•
Faulty ECM |
Enable Conditions |
•
Ignition "ON" | |
Threshold value |
•
Short circuit
•
Overheatingor overcurrent
•
SPI bus or signal fault
•
Open load | |
Diagnosis Time |
•
- | |
MIL On Condition |
•
1 Driving Cycle |
Fig. 1) Normal waveform of ETC motor & TPS1 at idle.
Fig. 2) Normal waveform of ETC motor & TPS1 with deceleration
