ECD SYSTEM, Diagnostic DTC:P2121

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

DESCRIPTION

Refer to DTC P2120.

Click here

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

P2121

Throttle / Pedal Position Sensor / Switch "D" Circuit Range / Performance

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 sensor assembly circuit

  • Accelerator pedal sensor assembly

  • ECM

Comes on

DTC stored
Table 1. Related Data List

DTC No.

Data List

P2121

  • Accel Position

  • Accel Sens. No.1 Volt %

  • Accel Sens. No.2 Volt %

CONFIRMATION DRIVING PATTERN

DTC No.

DTC Detection Drive Pattern

P2121

Ignition switch ON

  • Accelerator pedal fully closed for 3 seconds

  • Accelerator pedal open partway for 3 seconds

  • Accelerator pedal fully open for 3 seconds

WIRING DIAGRAM

Refer to DTC P2120.

Click here

CAUTION / NOTICE / HINT

Note:

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

Tip:

Read freeze frame data using the GTS. 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.

PROCEDURE

  1. READ VALUE USING GTS (ACCEL SENS. NO. 1 VOLT % AND ACCEL SENS. NO. 2 VOLT %)

    Click here

    Result

    Result

    Proceed to

    NG

    A

    OK

    B
    B

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIREDClick here

    A

  2. CHECK HARNESS AND CONNECTOR (ACCELERATOR PEDAL SENSOR ASSEMBLY - ECM)

    Click here

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTORClick here

    OK

  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 P2121)

    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 and ECT > Clear DTCs

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

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

    7. 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.

    8. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

    9. Read the DTCs.

      Powertrain > Engine and ECT > Trouble Codes

      Result

      Result

      Proceed to

      DTC P2121 is output

      A

      DTC is not output

      B
    B

    END

    A

  5. REPLACE ECM

    1. Replace the ECM.

      Click here

    Result

    Proceed to

    NEXT
    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIREDClick here

  6. REPAIR OR REPLACE HARNESS OR CONNECTOR

    1. Repair or replace the harness or connector.

    Result

    Proceed to

    NEXT
    NEXT

  7. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

    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 and ECT > Clear DTCs

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

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

    7. 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.

    8. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

    9. Confirm that the DTC is not output.

      Powertrain > Engine and ECT > Trouble Codes

    Result

    Proceed to

    NEXT
    NEXT

    END