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.

A003U9NE01
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

A003T2PE01

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. A003SDTE02
      Text in Illustration
      *a Accelerator Pedal Position Sensor Output Voltage (V)
      *b Accelerator Pedal Fully Released
      *c Accelerator Pedal Fully depressed
      *d 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. A003UYRE01
      Text in Illustration
      *A for RHD
      *B for LHD

      Check the connection of the accelerator pedal sensor assembly connector A3.

      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.

      A003TI1E01
      Text in Illustration
      *A for LHD *B 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 connector A3 from the accelerator pedal sensor assembly.

    2. Turn the power switch on (IG).

    3. A003UTPE11
      Text in Illustration
      *a

      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
      A3-4 (VCP1) - A3-5 (EP1) Power switch on (IG) 4.5 to 5.5 V
      A3-1 (VCP2) - A3-2 (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 ASSEMBLY) Click here

    OK

  5. CHECK POWER MANAGEMENT CONTROL ECU (CHECK RESISTANCE)


    1. Disconnect connector A3 from the accelerator pedal sensor assembly.

    2. A003UTPE12
      Text in Illustration
      *a

      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
      A3-6 (VPA1) - A3-5 (EP1) Power switch off 36.60 to 41.61 kΩ
      A3-3 (VPA2) - A3-2 (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 ASSEMBLY) Click here

    OK

    REPLACE ACCELERATOR PEDAL SENSOR ASSEMBLY Click here

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


    1. Disconnect connector A3 from the accelerator pedal sensor assembly.

    2. A003TWFE04
      Text in Illustration
      *a

      Rear view of wire harness connector:

      (to Power Management Control ECU)
      *b

      Front view of wire harness connector:

      (to Accelerator Pedal Sensor Assembly)

      Disconnect connector A99 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
      A99-26 (VPA1) - Body ground Power switch on (IG) Below 1 V
      A99-27 (VPA2) - Body ground Power switch on (IG) Below 1 V
      A99-34 (EP1) - Body ground Power switch on (IG) Below 1 V
      A99-35 (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
      A99-26 (VPA1) - A3-6 (VPA1) Power switch off Below 1 Ω
      A99-34 (EP1) - A3-5 (EP1) Power switch off Below 1 Ω
      A99-27 (VPA2) - A3-3 (VPA2) Power switch off Below 1 Ω
      A99-35 (EP2) - A3-2 (EP2) Power switch off Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Switch Condition Specified Condition
      A99-26 (VPA1) or A3-6 (VPA1) - Body ground and other terminals Power switch off 10 kΩ or higher
      A99-34 (EP1) or A3-5 (EP1) - Body ground and other terminals Power switch off 10 kΩ or higher
      A99-27 (VPA2) or A3-3 (VPA2) - Body ground and other terminals Power switch off 10 kΩ or higher
      A99-35 (EP2) or A3-2 (EP2) - Body ground and other terminals Power switch off 10 kΩ or higher

    7. Connect the power management control ECU connector.

    8. Connect the accelerator pedal sensor assembly connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

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


    1. Disconnect connector A3 from the accelerator pedal sensor assembly.

    2. Disconnect connector A99 from the power management control ECU.

    3. Turn the power switch on (IG).

    4. A003TWFE05
      Text in Illustration
      *a

      Rear view of wire harness connector:

      (to Power Management Control ECU)
      *b

      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
      A99-18 (VCP1) - Body ground Power switch on (IG) Below 1 V
      A99-34 (EP1) - Body ground Power switch on (IG) Below 1 V
      A99-19 (VCP2) - Body ground Power switch on (IG) Below 1 V
      A99-35 (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
      A99-18 (VCP1) - A3-4 (VCP1) Power switch off Below 1 Ω
      A99-34 (EP1) - A3-5 (EP1) Power switch off Below 1 Ω
      A99-19 (VCP2) - A3-1 (VCP2) Power switch off Below 1 Ω
      A99-35 (EP2) - A3-2 (EP2) Power switch off Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Switch Condition Specified Condition
      A99-18 (VCP1) or A3-4 (VCP1) - Body ground and other terminals Power switch off 10 kΩ or higher
      A99-34 (EP1) or A3-5 (EP1) - Body ground and other terminals Power switch off 10 kΩ or higher
      A99-19 (VCP2) or A3-1 (VCP2) - Body ground and other terminals Power switch off 10 kΩ or higher
      A99-35 (EP2) or A3-2 (EP2) - Body ground and other terminals Power switch off 10 kΩ or higher

    7. Connect the power management control ECU connector.

    8. Connect the accelerator pedal sensor assembly connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE POWER MANAGEMENT CONTROL ECU Click here