HYBRID CONTROL SYSTEM, Diagnostic DTC:P2120-152, P2121-106, P2122-104, P2123-105, P2125-153, P2126-109, P2127-107, P2128-108, P2138-110, P2138-154

DTC Code DTC Name
P2120-152 Throttle / Pedal Position Sensor / Switch "D" Circuit
P2121-106 Throttle / Pedal Position Sensor / Switch "D" Circuit Range / Performance
P2122-104 Throttle / Pedal Position Sensor / Switch "D" Circuit Low Input
P2123-105 Throttle / Pedal Position Sensor / Switch "D" Circuit High Input
P2125-153 Throttle / Pedal Position Sensor / Switch "E" Circuit
P2126-109 Throttle / Pedal Position Sensor / Switch "E" Circuit Range / Performance
P2127-107 Throttle / Pedal Position Sensor / Switch "E" Circuit Low Input
P2128-108 Throttle / Pedal Position Sensor / Switch "E" Circuit High Input
P2138-110 Throttle / Pedal Position Sensor / Switch "D" / "E" Voltage Correlation
P2138-154 Throttle / Pedal Position Sensor / Switch "D" / "E" Voltage Correlation

DESCRIPTION

The accelerator pedal position sensor is mounted on the accelerator pedal to detect how much the pedal is depressed. This is a non-contact sensor with hall elements. There are 2 outputs from the sensor. One is used to detect the accelerator pedal position and the other is used as a confirmation to allow the detection of a malfunction in the sensor itself. Voltage is output from the accelerator pedal position sensor to terminals VPA1 and VPA2 of the power management control ECU. This voltage varies from 0 to 5 V in accordance with the accelerator pedal position. Terminal VPA2 is primarily used to detect a malfunction in the sensor itself. The power management control ECU determines the current accelerator pedal position and controls the hybrid control system based on signals received by terminals VPA1 and VPA2.

A01NHOPE01
DTC No. INF Code DTC Detection Condition Trouble Area
P2120 152 Main sensor circuit wiring malfunction or level is not stable

  • Wire harness or connector

  • Accelerator pedal sensor assembly

  • Power management control ECU
P2121 106 Internal error of the main sensor
P2122 104 Open or short to GND in the main sensor circuit
P2123 105 Short to +B in the main sensor circuit
P2125 153 Sub sensor circuit wiring malfunction or level is not stable
P2126 109 Internal error of the sub sensor
P2127 107 Open or short to GND in the sub sensor circuit
P2128 108 Short to +B in the sub sensor circuit
P2138 110 Difference between the main sensor value and sub sensor value is large.
P2138 154 Main or sub sensor circuit wiring malfunction

WIRING DIAGRAM

A01NFQXE07

INSPECTION PROCEDURE

PROCEDURE


  1. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (ACCEL PEDAL POS #1, ACCEL PEDAL POS #2)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Powertrain / Hybrid Control / Data List / Accel Pedal Pos #1, Accel Pedal Pos #2.

    4. A01NDLEE01
      Text in Illustration
      *1 Accelerator Pedal Position Sensor Output Voltage (V)
      *2 Accelerator Pedal Fully Released
      *3 Accelerator Pedal Fully depressed
      *4 Accelerator Pedal Turning Angle (°)

      Read the Data List.

      Result
      Tester Display Accelerator Pedal Condition Specified Condition
      Accel Pedal Pos #1 Not depressed 8 to 28% (0.4 to 1.4 V)
      Fully depressed 62 to 92% (3.1 to 4.6 V)
      Not depressed → Fully depressed → Not depressed (Accelerator pedal should be operated slowly) Value changes progressively as shown in the illustration
      Accel Pedal Pos #2 Not depressed 20 to 44% (1.0 to 2.2 V)
      Fully depressed 78 to 100% (3.9 to 5.0 V)
      Not depressed → Fully depressed → Not depressed (Accelerator pedal should be operated slowly) Value changes progressively as shown in the illustration

      Tech Tips

      5 V is described as 100% on the tester.

    5. Turn the power switch off.


    NG

    CHECK CONNECTOR CONNECTION CONDITION (ACCELERATOR PEDAL SENSOR ASSEMBLY CONNECTOR) Click here

    OK

    CHECK FOR INTERMITTENT PROBLEMS Click here

  2. CHECK CONNECTOR CONNECTION CONDITION (ACCELERATOR PEDAL SENSOR ASSEMBLY CONNECTOR)


    1. A01NGXRE02

      Check the connection of the accelerator pedal sensor assembly connector A46.

      OK
      The connector is connected securely and there are no contact problems.

    NG

    CONNECT SECURELY

    OK

  3. CHECK CONNECTOR CONNECTION CONDITION (POWER MANAGEMENT CONTROL ECU CONNECTOR)


    1. Check the connections of the power management control ECU connectors.

      A01NF3IE01
      Text in Illustration
      *1 for LHD *2 for RHD
      OK
      The connectors are connected securely and there are no contact problems.

    NG

    CONNECT SECURELY

    OK

  4. CHECK POWER MANAGEMENT CONTROL ECU (CHECK VOLTAGE)


    1. Disconnect the accelerator pedal sensor assembly connector A46.

    2. Turn the power switch on (IG).

    3. A01NDBRE01
      Text in Illustration
      *1

      Front view of wire harness connector:

      (to Accelerator Pedal Sensor Assembly)

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      A46-4 (VCP1) - A46-5 (EP1) Power switch on (IG) 4.5 to 5.5 V
      A46-1 (VCP2) - A46-2 (EP2) Power switch on (IG) 4.5 to 5.5 V

    4. Connect the accelerator pedal sensor assembly connector.

    5. Turn the power switch off.


    NG

    CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - ACCELERATOR PEDAL SENSOR) Click here

    OK

  5. CHECK POWER MANAGEMENT CONTROL ECU (CHECK RESISTANCE)


    1. Disconnect the accelerator pedal sensor assembly connector A46.

    2. A01NDBRE02
      Text in Illustration
      *1

      Front view of wire harness connector:

      (to Accelerator Pedal Sensor Assembly)

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      A46-6 (VPA1) - A46-5 (EP1) Power switch off 36.60 to 41.61 kΩ
      A46-3 (VPA2) - A46-2 (EP2) Power switch off 36.60 to 41.61 kΩ

    3. Connect the accelerator pedal sensor assembly connector.


    NG

    CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - ACCELERATOR PEDAL SENSOR) Click here

    OK

    REPLACE ACCELERATOR PEDAL SENSOR ASSEMBLY Click here

  6. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - ACCELERATOR PEDAL SENSOR)


    1. Disconnect the accelerator pedal sensor assembly connector A46.

    2. A01NHRYE01
      Text in Illustration
      *1

      Rear view of wire harness connector:

      (to Power Management Control ECU)
      *2

      Front view of wire harness connector:

      (to Accelerator Pedal Sensor Assembly)

      Disconnect connector A81 from the power management control ECU.

    3. Turn the power switch on (IG).

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      A81-26 (VPA1) - Body ground Power switch on (IG) Below 1 V
      A81-27 (VPA2) - Body ground Power switch on (IG) Below 1 V
      A81-34 (EP1) - Body ground Power switch on (IG) Below 1 V
      A81-35 (EP2) - Body ground Power switch on (IG) Below 1 V

      Note

      Turning the power switch on (IG) with the power management control ECU connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

    5. Turn the power switch off.

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

      Standard Resistance (Check for open)
      Tester Connection Switch Condition Specified Condition
      A81-26 (VPA1) - A46-6 (VPA1) Power switch off Below 1 Ω
      A81-34 (EP1) - A46-5 (EP1) Power switch off Below 1 Ω
      A81-27 (VPA2) - A46-3 (VPA2) Power switch off Below 1 Ω
      A81-35 (EP2) - A46-2 (EP2) Power switch off Below 1 Ω
      Standard Resistance (Check for short)
      Tester Connection Switch Condition Specified Condition
      A81-26 (VPA1) or A46-6 (VPA1) - Body ground and other terminals Power switch off 10 kΩ or higher
      A81-34 (EP1) or A46-5 (EP1) - Body ground and other terminals Power switch off 10 kΩ or higher
      A81-27 (VPA2) or A46-3 (VPA2) - Body ground and other terminals Power switch off 10 kΩ or higher
      A81-35 (EP2) or A46-2 (EP2) - Body ground and other terminals Power switch off 10 kΩ or higher
      Result
      Result Proceed to
      OK (for LHD) A
      OK (for RHD) B
      NG C

    7. Connect the power management control ECU connector.

    8. Connect the accelerator pedal sensor assembly connector.


    B

    REPLACE POWER MANAGEMENT CONTROL ECU (for RHD) Click here

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    A

    REPLACE POWER MANAGEMENT CONTROL ECU (for LHD) Click here

  7. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - ACCELERATOR PEDAL SENSOR)


    1. Disconnect the accelerator pedal sensor assembly connector A46.

    2. Disconnect connector A81 from the power management control ECU.

    3. Turn the power switch on (IG).

    4. A01NHRYE02
      Text in Illustration
      *1

      Rear view of wire harness connector:

      (to Power Management Control ECU)
      *2

      Front view of wire harness connector:

      (to Accelerator Pedal Sensor Assembly)

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      A81-18 (VCP1) - Body ground Power switch on (IG) Below 1 V
      A81-34 (EP1) - Body ground Power switch on (IG) Below 1 V
      A81-19 (VCP2) - Body ground Power switch on (IG) Below 1 V
      A81-35 (EP2) - Body ground Power switch on (IG) Below 1 V

      Note

      Turning the power switch on (IG) with the power management control ECU connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

    5. Turn the power switch off.

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

      Standard Resistance (Check for open)
      Tester Connection Switch Condition Specified Condition
      A81-18 (VCP1) - A46-4 (VCP1) Power switch off Below 1 Ω
      A81-34 (EP1) - A46-5 (EP1) Power switch off Below 1 Ω
      A81-19 (VCP2) - A46-1 (VCP2) Power switch off Below 1 Ω
      A81-35 (EP2) - A46-2 (EP2) Power switch off Below 1 Ω
      Standard Resistance (Check for short)
      Tester Connection Switch Condition Specified Condition
      A81-18 (VCP1) or A46-4 (VCP1) - Body ground and other terminals Power switch off 10 kΩ or higher
      A81-34 (EP1) or A46-5 (EP1) - Body ground and other terminals Power switch off 10 kΩ or higher
      A81-19 (VCP2) or A46-1 (VCP2) - Body ground and other terminals Power switch off 10 kΩ or higher
      A81-35 (EP2) or A46-2 (EP2) - Body ground and other terminals Power switch off 10 kΩ or higher
      Result
      Result Proceed to
      OK (for LHD) A
      OK (for RHD) B
      NG C

    7. Connect the power management control ECU connector.

    8. Connect the accelerator pedal sensor assembly connector.


    B

    REPLACE POWER MANAGEMENT CONTROL ECU (for RHD) Click here

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    A

    REPLACE POWER MANAGEMENT CONTROL ECU (for LHD) Click here