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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Control System (2GR-FKS) - Diagnostic Codes (6 Of 6) & Circuit Tests (1 Of 2) >> SFI System >> DTC P2135-2B: Throttle/Pedal Position Sensor/Switch "A"/"B" Voltage Correlation Signal Cross Coupled [12/2019 - 10/2022] >> Procedure

DTC P2135-2B: Throttle/Pedal Position Sensor/Switch "A"/"B" Voltage Correlation Signal Cross Coupled [12/2019 - 10/2022]: Procedure

  1. READ VALUE USING GTS (THROTTLE POSITION SENSOR VOLTAGE) 
    1. Read the values displayed on the GTS.

      Powertrain > Engine > Data List 

      Tester Display
      Throttle Position Sensor No. 1 Voltage
      Throttle Position Sensor No. 2 Voltage

      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

    Result: 

    B 

    See step  4

    Result: 

    C 

    See step  6

    Result: 

    A 

    See step  2

  2. 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
      C26-5 (VC) - C54-121 (VCTA) Always Below 1 Ω
      C26-6 (VTA) - C54-122 (VTA1) Always Below 1 Ω
      C26-4 (VTA2) - C54-89 (VTA2) Always Below 1 Ω
      C26-3 (E2) - C54-120 (ETA) Always Below 1 Ω
      C26-5 (VC) or C54-121 (VCTA) - Body ground and other terminals Always 10 kΩ or higher
      C26-6 (VTA) or C54-122 (VTA1) - Body ground and other terminals Always 10 kΩ or higher
      C26-4 (VTA2) or C54-89 (VTA2) - Body ground and other terminals Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  3

  3. INSPECT TERMINAL VOLTAGE (POWER SOURCE OF THROTTLE POSITION SENSOR) 
    GTY911279Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *a Front view of wire harness connector
    (to Throttle Body with Motor Assembly)
    1. Disconnect the throttle body with motor assembly connector.
    2. Turn the ignition switch to ON.
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      C26-5 (VC) - C26-3 (E2) Ignition switch ON 4.5 to 5.5 V

      HINT: 

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

      Refer to INITIALIZATION [12/2019 - 10/2022]

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE THROTTLE BODY WITH MOTOR ASSEMBLY. Refer to  REMOVAL [12/2019 - 10/2022] 

    Result: 

    NG 

    REPLACE ECM. Refer to  REMOVAL [12/2019 - 09/2020]  , or refer to  REMOVAL [09/2020 - 10/2022] 

  4. CHECK HARNESS AND CONNECTOR (GROUND CIRCUIT) 

    HINT: 

    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
      C26-3 (E2) - Body ground Always Below 1 Ω

      HINT: 

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

      Refer to INITIALIZATION [12/2019 - 10/2022]

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE THROTTLE BODY WITH MOTOR ASSEMBLY. Refer to  REMOVAL [12/2019 - 10/2022] 

    Result: 

    NG 

    See step  5

  5. 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
      C26-5 (VC) - C54-121 (VCTA) Always Below 1 Ω
      C26-6 (VTA) - C54-122 (VTA1) Always Below 1 Ω
      C26-4 (VTA2) - C54-89 (VTA2) Always Below 1 Ω
      C26-3 (E2) - C54-120 (ETA) Always Below 1 Ω
      C26-5 (VC) or C54-121 (VCTA) - Other terminals Always 10 kΩ or higher
      C26-6 (VTA) or C54-122 (VTA1) - Other terminals Always 10 kΩ or higher
      C26-4 (VTA2) or C54-89 (VTA2) - Other terminals Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE ECM. Refer to  REMOVAL [12/2019 - 09/2020]  , or refer to  REMOVAL [09/2020 - 10/2022] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  6. 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
      C26-6 (VTA) - C26-4 (VTA2) Always 10 kΩ or higher

      HINT: 

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

      Refer to INITIALIZATION [12/2019 - 10/2022]

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE THROTTLE BODY WITH MOTOR ASSEMBLY. Refer to  REMOVAL [12/2019 - 10/2022] 

    Result: 

    NG 

    See step  7

  7. 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
      C26-6 (VTA) - C26-4 (VTA2) Always 10 kΩ or higher

      HINT: 

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

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE ECM. Refer to  REMOVAL [12/2019 - 09/2020]  , or refer to  REMOVAL [09/2020 - 10/2022] 

    Result: 

    NG 

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

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