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Home >> Lexus >> 2014 >> LS 460 Base, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Diagnostic Codes (P1603-U0319) & Circuit Tests) >> SFI System >> DTC P2121: Throttle / Pedal Position Sensor / Switch "D" Circuit Range / Performance [09/2013 - ] >> Procedure
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DTC P2121: Throttle / Pedal Position Sensor / Switch "D" Circuit Range / Performance [09/2013 - ]: Procedure

  1. READ VALUE USING TECHSTREAM (ACCELERATOR POSITION SENSOR) See step   1 

    OK → See step   3 

    NG: Go to next step 

  2. CHECK HARNESS AND CONNECTOR (ACCELERATOR PEDAL POSITION SENSOR - ECM) See step   2 

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  3. REPLACE ACCELERATOR PEDAL ROD ASSEMBLY 
    1. Replace the accelerator pedal rod assembly. Refer to REMOVAL [09/2013 - ] .

    NEXT: Go to next step 

  4. CHECK WHETHER DTC OUTPUT RECURS (ACCELERATOR PEDAL POSITION SENSOR DTCS) 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG) and turn the Techstream on.
    3. Clear DTCs. Refer to DTC CHECK / CLEAR [09/2013 - ] .
    4. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
    5. Enter the following menus: Powertrain / Engine / Trouble Codes.
    6. Read DTCs.

      Result

      Display (DTC Output) Proceed to
      P2121 A
      No output B

    B → SYSTEM OK 

    A → See step   5 

  5. REPLACE ECM. Refer to  REMOVAL [09/2013 - ]