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Home >> Kia >> 2009 >> Amanti >> Repair and Diagnosis >> Engine Performance >> System >> DTC Troubleshooting Procedures (2 Of 2) >> DTC Troubleshooting Procedures >> DTC P0638 Throttle Actuator Control Range/Performance >> Component Inspection

Component Inspection

  1. Check for sticking throttle valve
    1. IG "OFF".
    2. Disconnect the air hose between throttle body and air mass flow sensor.
    3. Check for sticking throttle valve.
    4. Is the throttle valve normal?

      YES 

      • Go to  2"Check ETS motor resistance" as follows.

      NO 

  2. Check ETS motor resistance
    1. IG "OFF".
    2. Disconnect ETS motor & TPS connector.
    3. Measure the resistance between terminal 2 and 3 of ETS motor & TPS connector (component side).

      Specification : Approx. 1.275 ~ 1.725Ω @ 23°C (73.4°F)

      Fig 1: Measuring Resistance Between Terminal 2 And 3 Of ETS Motor & TPS Connector
      G05301625Courtesy of KIA MOTORS AMERICA, INC.
    4. Is the measured resistance within specification?

      YES 

      • Go to  3"ETC motor actuation test" procedure.

      NO 

      • Substitute with a known - good ETC motor and check for proper operation. If the problem is corrected, replace ETC motor and go to "VERIFICATION OF VEHICLE REPAIR " procedure.

      * Procedure of ETS Initialization

      1. Erase the trouble codes on PCM
      2. Turn the ignition key off and keep this condition until the main relay is turned off. (10 sec)
      3. Turn ignition key on more than 1 second to record the throttle motor position on the EEPROM
  3. ETC motor actuation test
    1. IG "OFF".
    2. Connect ETS motor & TPS connector.
    3. After IG "ON", execute the "ETC motor actuation test" by Scan Tool.
      Fig 2: Scan Tool Display - Actuation Test
      G05301626Courtesy of KIA MOTORS AMERICA, INC.
    4. Does the "ETC motor actuation test" execute normally?

      YES 

      • Substitute with a known - good PCM and check for proper operation. If the problem is corrected, replace PCM and go to "VERIFICATION OF VEHICLE REPAIR " procedure.

      NO 

      • Substitute with a known - good ETC motor and check for proper operation. If the problem is corrected, replace ETC motor and go to "VERIFICATION OF VEHICLE REPAIR " procedure.

      * Procedure of ETS Initialization

      1. Erase the trouble codes on PCM
      2. Turn the ignition key off and keep this condition until the main relay is turned off. (10 sec)
      3. Turn ignition key on more than 1 second to record the throttle motor position on the EEPROM
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