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Home >> Kia >> 2007 >> Magentis 2.4 3 >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transaxle System >> DTC P0721 Output Speed Sensor Circuit Range/Performance >> Component Inspection
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Component Inspection

  1. Check "OUTPUT SPEED SENSOR"
    1. Ignition "OFF".
    2. Disconnect the "OUTPUT SPEED SENSOR" connector.
    3. Measure resistance between terminal "1","2" and "2","3" and "1","3" of the "OUTPUT SPEED SENSOR" connector.

      Specification: Refer to DATA REFERENCE CHART 

      Fig 1: Identifying Output Speed Sensor And Sensor Ground
      G04805108Courtesy of KIA MOTORS AMERICA, INC.
    4. Is resistance within specifications?

      [REFERENCE DATA] 

      DATA REFERENCE CHART

      Data Reference Data
      Current 22 mA
      Air Gap Input sensor 1.3 mm
      Output sensor 0.85 mm
      Resistance 1 (red) - 2 (black) Infinite
      1 (black) - 2 (red) Approx. 3.89 MΩ
      1 (red) - 3 (black) Approx. 6.55 MΩ
      1 (black) - 3 (red) Approx. 5.27 MΩ
      2 (red) - 3 (black) Approx. 17.5 MΩ
      2 (black) - 3 (red) Infinite

      YES  : --> Go to  2 "CHECK TCM (PCM)" as below.

      no  : --> Replace "OUTPUT SPEED SENSOR" as necessary and Go to "VERIFICATION OF VEHICLE REPAIR " procedure.

  2. CHECK TCM (PCM)
    1. Ignition "ON" & Engine "OFF".
    2. Connect "OUTPUT SPEED SENSOR" connector.
    3. Install scantool and select a SIMU-SCAN.
    4. Simulate frequency to OUTPUT SPEED SENSOR signal circuit.
      Fig 2: Display Screen Of - Output Speed
      G04805109Courtesy of KIA MOTORS AMERICA, INC.
    5. Is "OUTPUT SPEED SENSOR" signal value changed according to simulation frequency?

      YES  : --> Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.

      no  : --> Substitute with a known-good TCM (PCM) and check for proper operation. If the problem is corrected, replace TCM (PCM) as necessary and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.