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.

A01V0VDE05
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.
154 Main or sub sensor circuit wiring malfunction

WIRING DIAGRAM

A01UY19E21
*a Accelerator Pedal Sensor Assembly
*b Power Management Control ECU

CAUTION / NOTICE / HINT

Tech Tips

After the repair, clear the DTCs and perform the following procedure to check that DTCs are not output.


  1. Wait for approximately 10 seconds with the ignition switch to ON (READY) and the shift lever in P, then fully depress and release the accelerator pedal several times.

PROCEDURE


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


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON (IG).

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

    4. Read the Data List.

      Result
      GTS Display Accelerator Pedal Condition Specified Condition
      Accel Pedal Pos #1 Not depressed 10 to 22 %
      Fully depressed 52 to 90 %
      Not depressed → Fully depressed → Not depressed (Accelerator pedal should be operated slowly) Value changes progressively
      Accel Pedal Pos #2 Not depressed 24 to 40 %
      Fully depressed 68 to 99 %
      Not depressed → Fully depressed → Not depressed (Accelerator pedal should be operated slowly) Value changes progressively

    5. Turn the ignition switch off.


    OK

    CHECK FOR INTERMITTENT PROBLEMS Click here

    NG

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


    1. A01UZP8E01
      Text in Illustration
      *A for LHD
      *B for RHD

      Check the connection of the accelerator pedal sensor assembly connector.

      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. A01V0I0E01
      Text in Illustration
      *A for LHD
      *B for RHD

      Check the connector connections and contact pressure of the relevant terminals for the power management control ECU connectors Click here.

      OK
      The connectors are connected securely and there are no contact pressure problems.

    NG

    CONNECT SECURELY

    OK

  4. CHECK POWER MANAGEMENT CONTROL ECU (CHECK VOLTAGE)


    1. Disconnect the accelerator pedal sensor assembly connector.

    2. Turn the ignition switch to ON (IG).

    3. A01V0OTE01
      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
      A21-4 (VCP1) - A21-5 (EP1) Ignition switch ON (IG) 4.5 to 5.5 V
      A21-1 (VCP2) - A21-2 (EP2) Ignition switch ON (IG) 4.5 to 5.5 V

    4. Turn the ignition switch off.

    5. Connect the accelerator pedal sensor assembly connector.


    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.

    2. A01V1U5E01
      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
      A21-6 (VPA1) - A21-5 (EP1) Ignition switch off 36.60 to 41.61 kΩ
      A21-3 (VPA2) - A21-2 (EP2) Ignition switch off 36.60 to 41.61 kΩ

    3. Connect the accelerator pedal sensor assembly connector.


    OK

    REPLACE ACCELERATOR PEDAL SENSOR ASSEMBLY Click here

    NG

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


    1. Disconnect the accelerator pedal sensor assembly connector.

    2. Disconnect the power management control ECU connector.

      A01UY15E01

    3. Turn the ignition switch to ON (IG).

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      A27-26 (VPA1) - Body ground Ignition switch ON (IG) Below 1 V
      A27-27 (VPA2) - Body ground Ignition switch ON (IG) Below 1 V
      A27-34 (EP1) - Body ground Ignition switch ON (IG) Below 1 V
      A27-35 (EP2) - Body ground Ignition switch ON (IG) Below 1 V
      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)

      Note

      Turning the ignition switch to 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 ignition 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
      A27-26 (VPA1) - A21-6 (VPA1) Ignition switch off Below 1 Ω
      A27-34 (EP1) - A21-5 (EP1) Ignition switch off Below 1 Ω
      A27-27 (VPA2) - A21-3 (VPA2) Ignition switch off Below 1 Ω
      A27-35 (EP2) - A21-2 (EP2) Ignition switch off Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Switch Condition Specified Condition
      A27-26 (VPA1) or A21-6 (VPA1) - Body ground and other terminals Ignition switch off 10 kΩ or higher
      A27-34 (EP1) or A21-5 (EP1) - Body ground and other terminals Ignition switch off 10 kΩ or higher
      A27-27 (VPA2) or A21-3 (VPA2) - Body ground and other terminals Ignition switch off 10 kΩ or higher
      A27-35 (EP2) or A21-2 (EP2) - Body ground and other terminals Ignition switch off 10 kΩ or higher

    7. Connect the power management control ECU connector.

    8. Connect the accelerator pedal sensor assembly connector.


    OK

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

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


    1. Disconnect the accelerator pedal sensor assembly connector.

    2. Disconnect the power management control ECU connector.

    3. Turn the ignition switch to ON (IG).

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

      A01UY15E02
      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      A27-18 (VCP1) - Body ground Ignition switch ON (IG) Below 1 V
      A27-34 (EP1) - Body ground Ignition switch ON (IG) Below 1 V
      A27-19 (VCP2) - Body ground Ignition switch ON (IG) Below 1 V
      A27-35 (EP2) - Body ground Ignition switch ON (IG) Below 1 V
      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)

      Note

      Turning the ignition switch to 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 ignition 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
      A27-18 (VCP1) - A21-4 (VCP1) Ignition switch off Below 1 Ω
      A27-34 (EP1) - A21-5 (EP1) Ignition switch off Below 1 Ω
      A27-19 (VCP2) - A21-1 (VCP2) Ignition switch off Below 1 Ω
      A27-35 (EP2) - A21-2 (EP2) Ignition switch off Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Switch Condition Specified Condition
      A27-18 (VCP1) or A21-4 (VCP1) - Body ground and other terminals Ignition switch off 10 kΩ or higher
      A27-34 (EP1) or A21-5 (EP1) - Body ground and other terminals Ignition switch off 10 kΩ or higher
      A27-19 (VCP2) or A21-1 (VCP2) - Body ground and other terminals Ignition switch off 10 kΩ or higher
      A27-35 (EP2) or A21-2 (EP2) - Body ground and other terminals Ignition switch off 10 kΩ or higher

    7. Connect the power management control ECU connector.

    8. Connect the accelerator pedal sensor assembly connector.


    OK

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR