SFI SYSTEM, Diagnostic DTC:P21201C, P212099

DTC Code DTC Name
P21201C Throttle/Pedal Position Sensor/Switch "D" Circuit Voltage Out of Range
P212099 Throttle/Pedal Position Sensor/Switch "D" Exceeded Learning Limit

DESCRIPTION

Refer to DTC P212012.

Click here

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note
P21201C Throttle/Pedal Position Sensor/Switch "D" Circuit Voltage Out of Range Difference between VPA and VPA2 is greater than or equal to the specified value for 0.5 seconds (1 trip detection logic).

  • Accelerator pedal sensor assembly

  • ECM

 Comes on DTC stored SAE Code: P2121
P212099 Throttle/Pedal Position Sensor/Switch "D" Exceeded Learning Limit Difference between VPA and VPA2 is less than 0.4 V, or higher than 1.2 V (learned value of accelerator off position) (1 trip detection logic).

  • Accelerator pedal sensor assembly

  • ECM

 Comes on DTC stored SAE Code: P2121

MONITOR DESCRIPTION

The accelerator pedal position sensor is mounted on the accelerator pedal bracket. The accelerator pedal position sensor has 2 sensor elements and 2 signal outputs: VPA and VPA2. VPA is used to detect the actual accelerator pedal angle (used for engine control) and VPA2 is used to detect malfunctions in VPA. When the difference between the output voltages of VPA and VPA2 deviates from the standard, the ECM determines that the accelerator pedal position sensor is malfunctioning, illuminates the MIL and stores a DTC.

MONITOR STRATEGY

Required Sensors/Components Accelerator pedal sensor assembly
Frequency of Operation Continuous

CONFIRMATION DRIVING PATTERN

B003ZJPE64

  1. Connect the GTS to the DLC3.

  2. Turn the ignition switch to ON and turn the GTS on.

  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

  4. Turn the ignition switch off and wait for at least 30 seconds.

  5. Turn the ignition switch to ON and turn the GTS on [A].

  6. Wait for 5 seconds after turning the ignition switch to ON.

  7. Operate the accelerator pedal in accordance with the following procedure [B].


    1. Enter the following menus: Powertrain / Engine / Data List / Accelerator Position Sensor No.1 Voltage % and Accelerator Position Sensor No.2 Voltage %.

    2. Slowly depress the accelerator pedal until Accelerator Position Sensor No.1 Voltage % is approximately 30% and Accelerator Position Sensor No.2 Voltage % is approximately 46%, then slowly release the accelerator pedal.

  8. Enter the following menus: Powertrain / Engine / Trouble Codes [C].

  9. Read the pending DTCs.

    Tech Tips


    • If a pending DTC is output, the system is malfunctioning.

    • If a pending DTC is not output, perform the following procedure.

  10. Enter the following menus: Powertrain / Engine / Utility / All Readiness.

  11. Input the DTC: P21201C or P212099.

  12. Check the DTC judgment result.

    GTS Display Description
    NORMAL

    • DTC judgment completed

    • System normal
    ABNORMAL

    • DTC judgment completed

    • System abnormal
    INCOMPLETE

    • DTC judgment not completed

    • Perform driving pattern after confirming DTC enabling conditions
    N/A

    • Unable to perform DTC judgment

    • Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

    Tech Tips


    • If the judgment result shows NORMAL, the system is normal.

    • If the judgment result shows ABNORMAL, the system has a malfunction.

    • If the judgment result shows INCOMPLETE or N/A, perform steps [B] and [C] again.

FAIL-SAFE

When DTC P212012, P212014, P21201C, P21201F, P212099, P212512, P212514, P21251F or P21382B is stored, the ECM enters fail-safe mode. If either of the 2 sensor circuits malfunctions, the ECM limits the engine output. If both of the circuits malfunction, the ECM regards the accelerator pedal as being released. As a result, the throttle valve is closed and the engine idles.

If a pass condition is detected and then the ignition switch is turned off, the fail-safe operation stops and the system returns to normal.

WIRING DIAGRAM

Refer to DTC P212012.

Click here

CAUTION / NOTICE / HINT

Tech Tips

Read freeze frame data using the GTS. 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.

PROCEDURE


  1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P21201C AND/OR P212099)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine / Trouble Codes.

    5. Read the DTCs.


      Powertrain > Engine > Trouble Codes
      Result
      Result Proceed to
      DTC P21201C and/or P212099 are output A
      DTC P21201C and/or P212099 and other DTCs are output B

      Tech Tips

      If any DTCs other than P21201C and/or P212099 are output, troubleshoot those DTCs first.


    B

    GO TO DTC CHART Click here

    A

  2. READ VALUE USING GTS (ACCELERATOR PEDAL POSITION SENSOR)

    B003ZOTC07
    *a Fully Depressed
    *b Fully Released

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine / Data List / Accelerator Position Sensor No.1 Voltage and Accelerator Position Sensor No.2 Voltage.


      Powertrain > Engine > Data List
      Tester Display
      Accelerator Position Sensor No.1 Voltage
      Accelerator Position Sensor No.2 Voltage

    5. Read the values displayed on the GTS.

      Standard Voltage
      Accelerator Pedal Operation Accelerator Position Sensor No.1 Voltage Accelerator Position Sensor No.2 Voltage
      Fully Released 0.5 to 1.1 V 1.2 to 2.0 V
      Fully Depressed 2.6 to 4.5 V 3.4 to 4.75 V
      Result
      Proceed to
      OK
      NG

    OK

    CHECK FOR INTERMITTENT PROBLEMS Click here

    NG

  3. REPLACE ACCELERATOR PEDAL SENSOR ASSEMBLY


    1. Replace the accelerator pedal sensor assembly.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  4. CHECK WHETHER DTC OUTPUT RECURS (DTC P21201C AND/OR P212099)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Clear the DTCs.


      Powertrain > Engine > Clear DTCs

    5. Turn the ignition switch off and wait for at least 30 seconds.

    6. Turn the ignition switch to ON.

    7. Turn the GTS on.

    8. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.

    9. Enter the following menus: Powertrain / Engine / Trouble Codes.

    10. Read the DTCs.


      Powertrain > Engine > Trouble Codes
      Result
      Result Proceed to
      DTCs are not output A
      DTC P21201C and/or P212099 are output B

    A

    END

    B

    REPLACE ECM Click here