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СИСТЕМА ECD (для DPF), Diagnostic DTC:P2121

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DTC Code DTC Name
P2121 Throttle / Pedal Position Sensor / Switch "D" Circuit Range / Performance
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DESCRIPTION

Refer to DTC P2120 (Click here).

Table 1. P2121
DTC Detection Drive Pattern DTC Detection Condition Trouble Area

Ignition switch ON


  • Accelerator pedal fully closed for 3 seconds

  • Accelerator pedal open partway for 3 seconds

  • Accelerator pedal fully open for 3 seconds

The difference between VPA and VPA2 is below 0.4 V, or higher than 1.2 V for 0.5 seconds.

(1 trip detection logic)

  • Accelerator pedal position sensor circuit

  • Accelerator pedal position sensor

  • ECM
Table 2. Related Data List
DTC No. Data List
P2121

  • Accel Position

  • Accel Sens. No.1 Volt %

  • Accel Sens. No.2 Volt %
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WIRING DIAGRAM

Refer to DTC P2120 (Click here).

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INSPECTION PROCEDURE

Note:

After replacing the ECM, the new ECM needs registration (Click here) and initialization (Click here).

Tip:

Read freeze frame data using the intelligent tester. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, and other data from the time the malfunction occurred.

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PROCEDURE


  1. Click here

    READ VALUE USING INTELLIGENT TESTER (ACCELERATOR PEDAL POSITION SENSOR)


    1. A01INVZE03

      Connect the intelligent tester to the DLC3.

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

    3. Enter the following menus: Powertrain / Engine and ECT / Data List / Accel Sens. No.1 Volt % and Accel Sens. No.2 Volt %.

    4. Read the values.

      Standard Voltage
      Accelerator Pedal Accel Sens. No.1 Volt % Accel Sens. No.2 Volt %
      Released 8 to 28% 30 to 55%
      Depressed 51 to 86% 73 to 98%
      Table 3. Text in Illustration
      *1 Accelerator Pedal
      *a Depressed
      *b Released
      Table 4. Result
      Result Proceed to
      NG A
      OK B

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    CHECK HARNESS AND CONNECTOR (ACCELERATOR PEDAL POSITION SENSOR - ECM)


    1. A01IQOWE10

      Disconnect the accelerator pedal position sensor connector.

    2. Disconnect the ECM connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      A2-1 (VCP2) - A51-57 (VCP2) Always Below 1 Ω
      A2-2 (EPA2) - A51-58 (EPA2) Always Below 1 Ω
      A2-3 (VPA2) - A51-54 (VPA2) Always Below 1 Ω
      A2-4 (VCPA) - A51-55 (VCPA) Always Below 1 Ω
      A2-5 (EPA) - A51-56 (EPA) Always Below 1 Ω
      A2-6 (VPA) - A51-53 (VPA) Always Below 1 Ω
      A2-1 (VCP2) or A51-57 (VCP2) - Body ground Always 10 kΩ or higher
      A2-2 (EPA2) or A51-58 (EPA2) - Body ground Always 10 kΩ or higher
      A2-3 (VPA2) or A51-54 (VPA2) - Body ground Always 10 kΩ or higher
      A2-4 (VCPA) or A51-55 (VCPA) - Body ground Always 10 kΩ or higher
      A2-5 (EPA) or A51-56 (EPA) - Body ground Always 10 kΩ or higher
      A2-6 (VPA) or A51-53 (VPA) - Body ground Always 10 kΩ or higher
      Table 5. Text in Illustration
      *a

      Front view of wire harness connector

      (to Accelerator Pedal Position Sensor)
      *b

      Front view of wire harness connector

      (to ECM)

    4. Reconnect the accelerator pedal position sensor connector.

    5. Reconnect the ECM connector.


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    REPLACE ACCELERATOR PEDAL ROD ASSEMBLY


    1. Replace the accelerator pedal rod assembly (Click here).


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    CHECK WHETHER DTC OUTPUT RECURS (DTC P2121)


    1. Connect the intelligent tester to the DLC3.

    2. Clear the DTCs (Click here).

    3. Turn the ignition switch to ON.

    4. Fully close the accelerator pedal for 3 seconds or more, then hold it partway open for 3 seconds or more, and then fully open it for 3 seconds or more.

    5. Enter the following menus: Powertrain / Engine and ECT / DTC.

    6. Read the DTCs.

      Table 6. Result
      Result Proceed to
      P2121 is output A
      No DTC is output B

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    REPLACE ECM


    1. Replace the ECM (Click here).


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    REPAIR OR REPLACE HARNESS OR CONNECTOR


    1. Repair or replace the harness or connector.


  7. Click here

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Connect the intelligent tester to the DLC3.

    2. Clear the DTCs (Click here).

    3. Turn the ignition switch to ON.

    4. Fully close the accelerator pedal for 3 seconds or more, then hold it partway open for 3 seconds or more, and then fully open it for 3 seconds or more.

    5. Enter the following menus: Powertrain / Engine and ECT / DTC.

    6. Confirm that the DTC is not output again.


  8. Click here

    END