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 hybrid vehicle 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 hybrid vehicle control ECU determines the current accelerator pedal position and controls the hybrid control system based on signals received by terminals VPA1 and VPA2.

A005CYFE67
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

  • Hybrid vehicle 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

A005E1XE74

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 power switch on (READY) and park (P) selected, then fully depress and release the accelerator pedal several times.

PROCEDURE


  1. READ VALUE USING GTS (ACCEL PEDAL POS #1, ACCEL PEDAL POS #2)


    1. Connect the GTS 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. Read the Data List.

      Result
      Tester Display Accelerator Pedal Condition Specified Condition
      Accel Pedal Pos #1 Not depressed 8 to 28%
      Fully depressed 62 to 92%
      Not depressed → Fully depressed → Not depressed (Accelerator pedal should be operated slowly) Value changes progressively
      Accel Pedal Pos #2 Not depressed 20 to 44%
      Fully depressed 78 to 100%
      Not depressed → Fully depressed → Not depressed (Accelerator pedal should be operated slowly) Value changes progressively

    5. Turn the power switch off.


    OK

    CHECK FOR INTERMITTENT PROBLEMS Click here

    NG

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


    1. A005AU9E02
      Text in Illustration
      *A for LHD
      *B for RHD

      Check the connector connections and contact pressure of the relevant terminals for the accelerator pedal sensor assembly connector A29*1, A81*2 Click here. ()


      • *1: for LHD

      • *2: for RHD

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

    NG

    CONNECT SECURELY

    OK

  3. CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU CONNECTOR)


    1. Check the connector connections and contact pressure of the relevant terminals for the hybrid vehicle control ECU connectors Click here.

      B005ZP3E01
      Text in Illustration
      *A for LHD *B for RHD
      OK
      The connectors are connected securely and there are no contact pressure problems.

    NG

    CONNECT SECURELY

    OK

  4. CHECK HYBRID VEHICLE CONTROL ECU (CHECK VOLTAGE)


    1. Disconnect the A29 accelerator pedal sensor assembly connector. (for LHD)

    2. Disconnect the A81 accelerator pedal sensor assembly connector. (for RHD)

    3. Turn the power switch on (IG).

    4. A005DC9E02
      Text in Illustration
      *A for LHD
      *B for RHD
      *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
      for LHD
      Tester Connection Condition Specified Condition
      A29-4 (VCP1) - A29-5 (EP1) Power switch on (IG) 4.5 to 5.5 V
      A29-1 (VCP2) - A29-2 (EP2) Power switch on (IG) 4.5 to 5.5 V
      for RHD
      Tester Connection Condition Specified Condition
      A81-4 (VCP1) - A81-5 (EP1) Power switch on (IG) 4.5 to 5.5 V
      A81-1 (VCP2) - A81-2 (EP2) Power switch on (IG) 4.5 to 5.5 V

    5. Reconnect the A29 accelerator pedal sensor assembly connector. (for LHD)

    6. Reconnect the A81 accelerator pedal sensor assembly connector. (for RHD)

    7. Turn the power switch off.


    NG

    CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - ACCELERATOR PEDAL SENSOR) Click here

    OK

  5. CHECK HYBRID VEHICLE CONTROL ECU (CHECK RESISTANCE)


    1. Disconnect the A29 accelerator pedal sensor assembly connector. (for LHD)

    2. Disconnect the A81 accelerator pedal sensor assembly connector. (for RHD)

    3. A005CWNE02
      Text in Illustration
      *A for LHD
      *B for RHD
      *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
      for LHD
      Tester Connection Condition Specified Condition
      A29-6 (VPA1) - A29-5 (EP1) Power switch off 36.60 to 41.61 kΩ
      A29-3 (VPA2) - A29-2 (EP2) Power switch off 36.60 to 41.61 kΩ
      for RHD
      Tester Connection Condition Specified Condition
      A81-6 (VPA1) - A81-5 (EP1) Power switch off 36.60 to 41.61 kΩ
      A81-3 (VPA2) - A81-2 (EP2) Power switch off 36.60 to 41.61 kΩ

    4. Reconnect the A29 accelerator pedal sensor assembly connector. (for LHD)

    5. Reconnect the A81 accelerator pedal sensor assembly connector. (for RHD)


    OK

    REPLACE ACCELERATOR PEDAL SENSOR ASSEMBLY Click here

    NG

  6. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - ACCELERATOR PEDAL SENSOR)


    1. Disconnect the A29 accelerator pedal sensor assembly connector. (for LHD)

    2. Disconnect the A81 accelerator pedal sensor assembly connector. (for RHD)

    3. A0059XAE02
      Text in Illustration
      *A for LHD
      *B for RHD
      *a

      Rear view of wire harness connector

      (to Hybrid Vehicle Control ECU)
      *b

      Front view of wire harness connector

      (to Accelerator Pedal Sensor Assembly)

      Disconnect the A21 hybrid vehicle control ECU connector.

    4. Turn the power switch on (IG).

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A21-30 (VPA1) - Body ground Power switch on (IG) Below 1 V
      A21-28 (VPA2) - Body ground Power switch on (IG) Below 1 V
      A21-20 (EP1) - Body ground Power switch on (IG) Below 1 V
      A21-18 (EP2) - Body ground Power switch on (IG) Below 1 V

      Note

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

    6. Turn the power switch off.

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

      Standard Resistance (Check for Open)
      for LHD
      Tester Connection Condition Specified Condition
      A21-30 (VPA1) - A29-6 (VPA1) Power switch off Below 1 Ω
      A21-20 (EP1) - A29-5 (EP1) Power switch off Below 1 Ω
      A21-28 (VPA2) - A29-3 (VPA2) Power switch off Below 1 Ω
      A21-18 (EP2) - A29-2 (EP2) Power switch off Below 1 Ω
      for RHD
      Tester Connection Condition Specified Condition
      A21-30 (VPA1) - A81-6 (VPA1) Power switch off Below 1 Ω
      A21-20 (EP1) - A81-5 (EP1) Power switch off Below 1 Ω
      A21-28 (VPA2) - A81-3 (VPA2) Power switch off Below 1 Ω
      A21-18 (EP2) - A81-2 (EP2) Power switch off Below 1 Ω
      Standard Resistance (Check for Short)
      for LHD
      Tester Connection Condition Specified Condition
      A21-30 (VPA1) or A29-6 (VPA1) - Body ground and other terminals Power switch off 10 kΩ or higher
      A21-20 (EP1) or A29-5 (EP1) - Body ground and other terminals Power switch off 10 kΩ or higher
      A21-28 (VPA2) or A29-3 (VPA2) - Body ground and other terminals Power switch off 10 kΩ or higher
      A21-18 (EP2) or A29-2 (EP2) - Body ground and other terminals Power switch off 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      A21-30 (VPA1) or A81-6 (VPA1) - Body ground and other terminals Power switch off 10 kΩ or higher
      A21-20 (EP1) or A81-5 (EP1) - Body ground and other terminals Power switch off 10 kΩ or higher
      A21-28 (VPA2) or A81-3 (VPA2) - Body ground and other terminals Power switch off 10 kΩ or higher
      A21-18 (EP2) or A81-2 (EP2) - Body ground and other terminals Power switch off 10 kΩ or higher

    8. Reconnect the A21 hybrid vehicle control ECU connector.

    9. Reconnect the A29 accelerator pedal sensor assembly connector. (for LHD)

    10. Reconnect the A81 accelerator pedal sensor assembly connector. (for RHD)


    OK

    REPLACE HYBRID VEHICLE CONTROL ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  7. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - ACCELERATOR PEDAL SENSOR)


    1. Disconnect the A29 accelerator pedal sensor assembly connector. (for LHD)

    2. Disconnect the A81 accelerator pedal sensor assembly connector. (for RHD)

    3. Disconnect the A21 hybrid vehicle control ECU connector.

    4. Turn the power switch on (IG).

    5. A005A3RE02
      Text in Illustration
      *A for LHD
      *B for RHD
      *a

      Rear view of wire harness connector

      (to Hybrid Vehicle 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 Condition Specified Condition
      A21-9 (VCP1) - Body ground Power switch on (IG) Below 1 V
      A21-20 (EP1) - Body ground Power switch on (IG) Below 1 V
      A21-8 (VCP2) - Body ground Power switch on (IG) Below 1 V
      A21-18 (EP2) - Body ground Power switch on (IG) Below 1 V

      Note

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

    6. Turn the power switch off.

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

      Standard Resistance (Check for Open)
      for LHD
      Tester Connection Condition Specified Condition
      A21-9 (VCP1) - A29-4 (VCP1) Power switch off Below 1 Ω
      A21-20 (EP1) - A29-5 (EP1) Power switch off Below 1 Ω
      A21-8 (VCP2) - A29-1 (VCP2) Power switch off Below 1 Ω
      A21-18 (EP2) - A29-2 (EP2) Power switch off Below 1 Ω
      for RHD
      Tester Connection Condition Specified Condition
      A21-9 (VCP1) - A81-4 (VCP1) Power switch off Below 1 Ω
      A21-20 (EP1) - A81-5 (EP1) Power switch off Below 1 Ω
      A21-8 (VCP2) - A81-1 (VCP2) Power switch off Below 1 Ω
      A21-18 (EP2) - A81-2 (EP2) Power switch off Below 1 Ω
      Standard Resistance (Check for Short)
      for LHD
      Tester Connection Condition Specified Condition
      A21-9 (VCP1) or A29-4 (VCP1) - Body ground and other terminals Power switch off 10 kΩ or higher
      A21-20 (EP1) or A29-5 (EP1) - Body ground and other terminals Power switch off 10 kΩ or higher
      A21-8 (VCP2) or A29-1 (VCP2) - Body ground and other terminals Power switch off 10 kΩ or higher
      A21-18 (EP2) or A29-2 (EP2) - Body ground and other terminals Power switch off 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      A21-9 (VCP1) or A81-4 (VCP1) - Body ground and other terminals Power switch off 10 kΩ or higher
      A21-20 (EP1) or A81-5 (EP1) - Body ground and other terminals Power switch off 10 kΩ or higher
      A21-8 (VCP2) or A81-1 (VCP2) - Body ground and other terminals Power switch off 10 kΩ or higher
      A21-18 (EP2) or A81-2 (EP2) - Body ground and other terminals Power switch off 10 kΩ or higher

    8. Reconnect the A21 hybrid vehicle control ECU connector.

    9. Reconnect the A29 accelerator pedal sensor assembly connector. (for LHD)

    10. Reconnect the A81 accelerator pedal sensor assembly connector. (for RHD)


    OK

    REPLACE HYBRID VEHICLE CONTROL ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR