СИСТЕМА ECD, Diagnostic DTC:P2120, P2122, P2123, P2125, P2127, P2128, P2138

DTC Code DTC Name
P2120 Throttle / Pedal Position Sensor / Switch "D" Circuit
P2122 Throttle / Pedal Position Sensor / Switch "D" Circuit Low Input
P2123 Throttle / Pedal Position Sensor / Switch "D" Circuit High Input
P2125 Throttle / Pedal Position Sensor / Switch "E" Circuit
P2127 Throttle / Pedal Position Sensor / Switch "E" Circuit Low Input
P2128 Throttle / Pedal Position Sensor / Switch "E" Circuit High Input
P2138 Throttle / Pedal Position Sensor / Switch "D" / "E" Voltage Correlation

DESCRIPTION

Tip:
  • This is the repair procedure for the accelerator pedal sensor assembly.

  • This accelerator pedal sensor assembly is a non-contact type.

The accelerator pedal sensor assembly is mounted on the accelerator pedal and detects the opening angle of the accelerator pedal. Since this sensor is electronically controlled with Hall-effect elements, accurate control and reliability can be obtained. The accelerator pedal sensor assembly has 2 sensors to detect the accelerator position and a malfunction of the accelerator pedal sensor assembly.

In the accelerator pedal sensor assembly, the voltage applied to pedal terminals VPA and VPA2 of the ECM changes between 0.5 V and 4.75 V in proportion to the opening angle of the accelerator pedal. The VPA is a signal to indicate the actual accelerator pedal opening angle which is used for the engine control, and the VPA2 is a signal to indicate information about the opening angle which is used for detecting malfunctions. The ECM judges the current opening angle of the accelerator pedal using signals from terminals VPA and VPA2, and the ECM controls the throttle motor based on these signals.

A012KWHE09
DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P2120 Throttle / Pedal Position Sensor / Switch "D" Circuit

Condition (a) continues for 0.5 seconds (1 trip detection logic):

(a) VPA is below 0.4 V and VPA2 is more than 0.97 deg, or VPA is higher than 4.8 V.

  • Accelerator pedal sensor assembly

  • Accelerator pedal sensor assembly deformed

  • ECM

Comes on DTC stored
P2122 Throttle / Pedal Position Sensor / Switch "D" Circuit Low Input

Conditions (a) and (b) continue for 0.5 seconds (1 trip detection logic):

(a) VPA is below 0.4 V.

(b) VPA2 is more than 2.7 deg.

  • Accelerator pedal sensor assembly

  • Open in VCPA circuit

  • VPA circuit open or ground short

  • Accelerator pedal sensor assembly deformed

  • ECM

Comes on DTC stored
P2123 Throttle / Pedal Position Sensor / Switch "D" Circuit High Input

Condition (a) continues for 2.0 seconds (1 trip detection logic):

(a) VPA is higher than 4.8 V.

  • Accelerator pedal sensor assembly

  • Open in EPA circuit

  • Accelerator pedal sensor assembly deformed

  • ECM

Comes on DTC stored
P2125 Throttle / Pedal Position Sensor / Switch "E" Circuit

Condition (a) continues for 0.5 seconds (1 trip detection logic):

(a) VPA2 is below 1.2 V and VPA is more than 2.7 deg, or VPA2 is higher than 4.8 V and VPA is higher than 0.4 V but below 3.45 V.

  • Accelerator pedal sensor assembly

  • Accelerator pedal sensor assembly deformed

  • ECM

Comes on DTC stored
P2127 Throttle / Pedal Position Sensor / Switch "E" Circuit Low Input

Conditions (a) and (b) continue for 0.5 seconds (1 trip detection logic):

(a) VPA2 is below 1.2 V

(b) VPA1 is more than 2.7 deg.

  • Accelerator pedal sensor assembly

  • Open in VCP2 circuit

  • VPA2 circuit open or ground short

  • Accelerator pedal sensor assembly deformed

  • ECM

Comes on DTC stored
P2128 Throttle / Pedal Position Sensor / Switch "E" Circuit High Input

Conditions (a) and (b) continue for 2.0 seconds (1 trip detection logic):

(a) VPA2 is higher than 4.8 V.

(b) VPA is higher than 0.4 V but below 3.45 V.

  • Accelerator pedal sensor assembly

  • Open in EPA2 circuit

  • Accelerator pedal sensor assembly deformed

  • ECM

Comes on DTC stored
P2138 Throttle / Pedal Position Sensor / Switch "D" / "E" Voltage Correlation

Condition (a) or (b) continues for 2.0 seconds (1 trip detection logic):

(a) The difference between VPA and VPA2 is below 0.02 V.

(b) VPA is below 0.4 V and VPA2 is below 1.2 V.

  • Accelerator pedal sensor assembly

  • VPA and VPA2 circuits are short-circuited

  • Accelerator pedal sensor assembly deformed

  • ECM

Comes on DTC stored
Table 1. Related Data List
DTC No. Data List
P2120
  • Accel Position

  • Accel Sens. No.1 Volt %

  • Accel Sens. No.2 Volt %

P2122
P2123
P2125
P2127
P2128
P2138

CONFIRMATION DRIVING PATTERN

DTC No. DTC Detection Drive Pattern
P2120

Ignition switch ON

  • Accelerator pedal fully closed for 3 seconds

  • Accelerator pedal open partway for 3 seconds

  • Accelerator pedal fully open for 3 seconds

P2122
P2123
P2125
P2127
P2128
P2138

WIRING DIAGRAM

A012MGVE01
Table 2.
*a Accelerator Pedal Sensor Assembly

CAUTION / NOTICE / HINT

Note:

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

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 %)

    1. Connect the GTS to the DLC3.

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

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

      Powertrain > Engine and ECT > Data List
      Tester Display
      Accel Sens. No.1 Volt %
      Accel Sens. No.2 Volt %
    4. Read the values.

      Standard
      Accelerator Pedal Accel Sens. No.1 Volt % Accel Sens. No.2 Volt %
      Fully Released 10 to 22% 24 to 40%
      Fully Depressed 52 to 90% 68 to 95%
      Result
      Result Proceed to
      NG A
      OK B
    B Нажмите здесь

    GO TO STEP 7


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

    1. Disconnect the accelerator pedal sensor assembly 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
      A3-1 (VCP2) - A118-57 (VCP2) Always Below 1 Ω
      A3-2 (EPA2) - A118-58 (EPA2) Always Below 1 Ω
      A3-3 (VPA2) - A118-54 (VPA2) Always Below 1 Ω
      A3-4 (VCPA) - A118-55 (VCPA) Always Below 1 Ω
      A3-5 (EPA) - A118-56 (EPA) Always Below 1 Ω
      A3-6 (VPA) - A118-53 (VPA) Always Below 1 Ω
      A3-1 (VCP2) or A118-57 (VCP2) - Body ground Always 10 kΩ or higher
      A3-2 (EPA2) or A118-58 (EPA2) - Body ground Always 10 kΩ or higher
      A3-3 (VPA2) or A118-54 (VPA2) - Body ground Always 10 kΩ or higher
      A3-4 (VCPA) or A118-55 (VCPA) - Body ground Always 10 kΩ or higher
      A3-5 (EPA) or A118-56 (EPA) - Body ground Always 10 kΩ or higher
      A3-6 (VPA) or A118-53 (VPA) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG
    NG Нажмите здесь

    OK
  3. CHECK TERMINAL VOLTAGE (POWER SOURCE OF ACCELERATOR PEDAL SENSOR ASSEMBLY)

    1. Disconnect the accelerator pedal sensor assembly connector.

      A012MAAC04
      *a

      Front view of wire harness connector

      (to Accelerator Pedal Sensor Assembly)

    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition
      A3-4 (VCPA) - A3-5 (EPA) Ignition switch ON 4.5 to 5.5 V
      A3-1 (VCP2) - A3-2 (EPA2) Ignition switch ON 4.5 to 5.5 V
      Result
      Proceed to
      OK
      NG
    NG Нажмите здесь

    OK
  4. REPLACE ACCELERATOR PEDAL SENSOR ASSEMBLY

    1. Replace the accelerator pedal sensor assembly.

      Click hereНажмите здесь

      Result
      Proceed to
      NEXT
    NEXT Нажмите здесь

    GO TO STEP 7


  5. REPLACE ECM

    1. Replace the ECM.

      Click hereНажмите здесь

      Result
      Proceed to
      NEXT
    NEXT Нажмите здесь

    GO TO STEP 7


  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