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Home >> Kia >> 2016 >> Cadenza Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (1 Of 3) >> DTC P0121: Throttle Position Sensor 1 Signal Circuit Range/Performance >> Component Inspection
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Component Inspection

■ Check TPS 

  1. IG "ON"
  2. Monitor signal waveform and output voltage of TPS by stepping on and off the accelerator pedal in GDS.

    Specification: 

    Throttle Opening (°) Output Voltage (V) [Vref=5.0]
    TPS1 TPS2
    0 0.5 4.5
    10 0.96 4.05
    20 1.41 3.59
    30 1.87 3.14
    40 2.32 2.68
    50 2.78 2.23
    60 3.23 1.77
    70 3.69 1.32
    80 4.14 0.86
    90 4.6 0.41
    98 4.65 0.35
    C.T (0) 0.5 4.5
    W.O.T (86) 4.41 0.59
    Fig 1: Screen Display - Normal Graph Of TPS1 & TPS2 With Acceleration Pedal Not Depressed With IG ON
    G11790106Courtesy of KIA MOTORS AMERICA, INC.
    Fig 2: Screen Display - Normal Graph Of TPS1 & TPS2 With Acceleration Pedal Depressed With IG ON
    G11790107Courtesy of KIA MOTORS AMERICA, INC.
  3. Is the measured signal waveform O.K?

    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 TPS and check for proper operation. If the problem is corrected, replace TPS and then go to "VERIFICATION OF VEHICLE REPAIR " procedure. (After replacing ETC, do initialization of ETC as follows)

* ETC module learning procedure

When installing new ETC module or re-installing it, ETC module learning procedure must be performed.

  1. Hold the ignition key or the start button at the IG ON position during 5 seconds.
  2. Turn ignition switch OFF and then start the engine.
    CAUTION: DTC codes (P0638, P2110) might be displayed if ETC module learning procedure does not performed after replacing ETC module.