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SFI SYSTEM(w/ Canister Pump Module), Diagnostic DTC:P21352B

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DTC Code DTC Name
P21352B Throttle/Pedal Position Sensor/Switch "A"/"B" Voltage Correlation Signal Cross Coupled
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DESCRIPTION

Refer to DTC P012011.

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DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note
P21352B Throttle/Pedal Position Sensor/Switch "A"/"B" Voltage Correlation Signal Cross Coupled The difference between the output voltage of VTA1 and VTA2 is 0.02 V or less for 2 seconds or more (1 trip detection logic).

  • Throttle position sensor (throttle body with motor assembly)

  • Short between VTA1 and VTA2 circuits

  • Open in ETA circuit

  • Open in VCTA circuit

  • ECM

 Comes on DTC stored SAE: P2135
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MONITOR DESCRIPTION

VTA1 and VTA2 should never be close to the same voltage level. If VTA1 is within 0.02 V of VTA2 for 2 seconds or more, the ECM will determine there is a short in the sensor circuit, illuminate the MIL and store this DTC.

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MONITOR STRATEGY

Frequency of Operation Continuous
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CONFIRMATION DRIVING PATTERN


  1. Connect the GTS to the DLC3.

  2. Turn the power switch on (IG).

  3. Turn the GTS on.

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

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

  6. Turn the power switch on (IG) [A].

  7. Turn the GTS on.

  8. Put the engine in Inspection Mode (2WD for measuring Exhaust Gas).

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  9. Start the engine.

  10. With the vehicle stationary, fully depress and release the accelerator pedal [B].

    Tip:

    During charge control, the engine speed is set at idle. Therefore, the engine speed will not increase when the accelerator pedal is depressed. In this case, perform step [B] after charge control has completed.

  11. Idle the engine for 2 seconds or more [C].

  12. Enter the following menus: Powertrain / Engine / Trouble Codes [D].

  13. Read the pending DTCs.

    Tip:

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

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

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

  15. Input the DTC: P21352B.

  16. 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
    Tip:

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

    • If the judgment result shows ABNORMAL, the system is malfunctioning.

    • If the judgment result shows INCOMPLETE, perform steps [B] through [D] again.

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FAIL-SAFE

When this DTC is stored, the ECM enters fail-safe mode. During fail-safe mode, the ECM cuts the current to the throttle actuator, and the throttle valve is returned to a 7° throttle valve opening angle by the return spring. The ECM then adjusts the engine output, by controlling the fuel injection (intermittent fuel cut) and ignition timing, in accordance with the engine torque request signal sent from the hybrid vehicle control ECU, to allow the vehicle to continue being driven at a minimal speed. If the accelerator pedal is depressed firmly and gently, the vehicle can be driven slowly.

Fail-safe mode continues until a pass condition is detected, and the power switch is turned off.

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WIRING DIAGRAM

Refer to DTC P012011.

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CAUTION / NOTICE / HINT

Note:

  • Vehicle Control History may be stored in the hybrid vehicle control ECU if the engine is malfunctioning. Certain vehicle condition information is recorded when Vehicle Control History is stored. Reading the vehicle conditions recorded in both the freeze frame data and Vehicle Control History can be useful for troubleshooting.

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    (Select Powertrain in Health Check and then check the time stamp data.)

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  • If any "Engine Malfunction" Vehicle Control History item has been stored in the hybrid vehicle control ECU, make sure to clear it. However, as all Vehicle Control History items are cleared simultaneously, if any Vehicle Control History items other than "Engine Malfunction" are stored, make sure to perform any troubleshooting for them before clearing Vehicle Control History.

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Tip:

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.

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PROCEDURE


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    READ VALUE USING GTS (THROTTLE POSITION SENSOR VOLTAGE)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

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


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





    5. Read the values displayed on the GTS.

      Result
      Result Proceed to
      Value of both Throttle Position Sensor No.1 Voltage and Throttle Position Sensor No.2 Voltage are less than 0.56 V A
      Value of both Throttle Position Sensor No.1 Voltage and Throttle Position Sensor No.2 Voltage are higher than 4.535 V B
      Value of both Throttle Position Sensor No.1 Voltage and Throttle Position Sensor No.2 Voltage are between 0.56 V and 4.535 V C

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    CHECK HARNESS AND CONNECTOR (THROTTLE POSITION SENSOR - ECM)


    1. Disconnect the throttle body with motor 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
      D9-5 (VC) - D1-121 (VCTA) Always Below 1 Ω
      D9-6 (VTA) - D1-122 (VTA1) Always Below 1 Ω
      D9-4 (VTA2) - D1-89 (VTA2) Always Below 1 Ω
      D9-3 (E2) - D1-120 (ETA) Always Below 1 Ω
      D9-5 (VC) or D1-121 (VCTA) - Body ground and other terminals Always 10 kΩ or higher
      D9-6 (VTA) or D1-122 (VTA1) - Body ground and other terminals Always 10 kΩ or higher
      D9-4 (VTA2) or D1-89 (VTA2) - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

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    INSPECT TERMINAL VOLTAGE (POWER SOURCE OF THROTTLE POSITION SENSOR)


    1. Disconnect the throttle body with motor assembly connector.

    2. Turn the power switch on (IG).

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      D9-5 (VC) - D9-3 (E2) Power switch on (IG) 4.5 to 5.5 V
      Tip:

      Perform "Inspection After Repair" after replacing the throttle body with motor assembly.

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      Result
      Proceed to
      OK
      NG

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    CHECK HARNESS AND CONNECTOR (GROUND CIRCUIT)

    Tip:

    Make sure that the connector is properly connected. If it is not, securely connect it and check for DTCs again.


    1. Disconnect the throttle body with motor assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D9-3 (E2) - Body ground Always Below 1 Ω
      Tip:

      Perform "Inspection After Repair" after replacing the throttle body with motor assembly.

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      Result
      Proceed to
      OK
      NG

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    CHECK HARNESS AND CONNECTOR (THROTTLE POSITION SENSOR - ECM)


    1. Disconnect the throttle body with motor 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
      D9-5 (VC) - D1-121 (VCTA) Always Below 1 Ω
      D9-6 (VTA) - D1-122 (VTA1) Always Below 1 Ω
      D9-4 (VTA2) - D1-89 (VTA2) Always Below 1 Ω
      D9-3 (E2) - D1-120 (ETA) Always Below 1 Ω
      D9-5 (VC) or D1-121 (VCTA) - Body ground and other terminals Always 10 kΩ or higher
      D9-6 (VTA) or D1-122 (VTA1) - Body ground and other terminals Always 10 kΩ or higher
      D9-4 (VTA2) or D1-89 (VTA2) - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    • OK

      REPLACE ECMClick here

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

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    CHECK HARNESS AND CONNECTOR (SHORT CIRCUIT)


    1. Disconnect the throttle body with motor assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D9-6 (VTA) - D9-4 (VTA2) Always 10 kΩ or higher
      Tip:

      Perform "Inspection After Repair" after replacing the throttle body with motor assembly.

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      Result
      Proceed to
      OK
      NG

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    CHECK HARNESS AND CONNECTOR (SHORT CIRCUIT)


    1. Disconnect the throttle body with motor 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
      D9-6 (VTA) - D9-4 (VTA2) Always 10 kΩ or higher
      Tip:

      If the resistance changes when the ECM connector is disconnected, there is an internal short in the ECM.

      Result
      Proceed to
      OK
      NG

    • OK

      REPLACE ECMClick here

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR (THROTTLE POSITION SENSOR - ECM)