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Home >> Toyota >> 2009 >> Highlander Limited, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 20 (Engine Control System (1AR-FE) - DTC P0705 - P2A00, DTC U0101) >> DTC P2121 Throttle/Pedal Position Sensor/Switch "D" Circuit Range/Performance >> Inspection Procedure

Inspection Procedure

WARNING: This page is about a different variant/trim than selected.

HINT:

Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

  1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P2121) 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn the Techstream on.
    4. Enter the following menus: Powertrain/Engine/Trouble Codes.
    5. Read the DTCs.

      Result 

      RESULT CHART

      Result Proceed to
      DTC P2121 is output A
      DTC P2121 and other DTCs are output B

      HINT:

      If any DTCs other than P2121 are output, troubleshoot those DTCs first.

      B:  GO TO DTC CHART

      A: Go to next step 

  2. READ VALUE USING TECHSTREAM (ACCELERATOR PEDAL POSITION SENSOR)  (See INSPECTION PROCEDURE  )

    NG: Go to step 3 

    OK: CHECK FOR INTERMITTENT PROBLEMS  (See CHECK FOR INTERMITTENT PROBLEMS )

  3. REPLACE ACCELERATOR PEDAL ROD ASSEMBLY 
    1. Replace the accelerator pedal rod assembly (See REMOVAL ).
  4. CHECK WHETHER DTC OUTPUT RECURS (ACCELERATOR PEDAL POSITION SENSOR DTCS) 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn the Techstream on.
    4. Clear the DTCs (See DTC CHECK/CLEAR ).
    5. Turn the ignition switch off.
    6. Turn the ignition switch to ON and turn the Techstream on.
    7. Drive the vehicle in accordance with the driving pattern described in the CONFIRMATION DRIVING PATTERN .
    8. Enter the following menus: Powertrain/Engine/Trouble Codes.
    9. Read the DTCs.

      Result 

      RESULT CHART

      Result Proceed to
      DTC P2121 is output A
      DTC is not output B

      B: REPAIR COMPLETED 

      A: REPLACE ECM  (See REMOVAL )