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Home >> Kia >> 2022 >> Rio LX >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (5 Of 6) >> DTC P0638-00: Throttle Actuator Control Range/Performance >> DTC Information >> DTC Detecting Condition
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DTC Information: DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy Case 1
  • Monitor the return spring
  • Poor connector connection
  • Faulty TPS 1 or TPS 2 Sensor
  • Faulty ETC motor
Case 2, 3
  • Faulty the relearning ETC
Case 4, 5
  • Faulty the learning
Case 6
  • Faulty the learning TPS (Firstly)
Case 7
  • Monitor the limp-home
Enable Conditions Case 1
  • Firstly learn the TPS
Case 2
  • Firstly learn the TPS
  • Throttle position sensor control duty (more then 60%)
Case 3
  • Deviation between the pre-previous value of learning and the present value
  • Replace the throttle
  • Reset the ECM/PCM
  • Throttle position sensor control duty (more then 60%)
Case 4, 5
  • During the learning of TPS
Case 6
  • Ignition "ON" and learn the TPS
Case 7
  • Ignition "ON"
Threshold Value Case 1
  • Deviation between actual throttle angle and limp-home mode throttle angle is higher than 3%
Case 2
  • Mechanical minimum voltage of TPS 1 signal is lower than 0.31V
  • Mechanical minimum voltage of TPS 2 signal is higher than 4.69V
  • The sum of mechanical minimum voltage of TPS 1 signal and TPS 2 signal is higher than 5V
Case 3
  • Mechanical minimum voltage of TPS 1 signal is higher than 0.69V (offset)
  • Mechanical minimum voltage of TPS 2 signal is lower than 4.3V (offset) * Offset is 0V
Case 4
  • Engine speed is higher than 250 RPM
  • Vehicle speed is higher than 0km/h (0 mph)
  • Accelerator position is higher than 15%
  • Coolant temperature is higher than 100°C (212°F) or lower than 5.3°C (41.5°F)
  • Intake air temperature is lower than 5.3°C (41.5°F)
Case 5
  • Sensor voltage is lower than 10V
Case 6
  • Stop learning in abnormal conditions
Case 7
  • Limp-home mode throttle angle is higher than 19.5% or lower than 1.0%
Diagnostic Time Case 1
  • Continuous (1s)
Case 2, 3
  • Continuous (0.3s)
Case 4, 5, 6, 7
  • Continuous (0.2s)
MIL ON Condition Case 1, 2, 3, 5, 6
  • 1 driving cycle
Case 4, 7
  • 2 driving cycles