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

A01KTE1E27
DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate
P2120-152 Throttle / Pedal Position Sensor / Switch "D" Circuit Main sensor circuit wiring malfunction or level is not stable

  • Wire harness or connector

  • Accelerator pedal sensor assembly

  • Hybrid vehicle control ECU assembly

 Does not come on

Master Warning Light:

Comes on
P2121-106 Throttle / Pedal Position Sensor / Switch "D" Circuit Range / Performance Internal error of the main sensor

  • Wire harness or connector

  • Accelerator pedal sensor assembly

  • Hybrid vehicle control ECU assembly

 Does not come on

Master Warning Light:

Comes on
P2122-104 Throttle / Pedal Position Sensor / Switch "D" Circuit Low Input Open or short to GND in the main sensor circuit

  • Wire harness or connector

  • Accelerator pedal sensor assembly

  • Hybrid vehicle control ECU assembly

 Does not come on

Master Warning Light:

Comes on
P2123-105 Throttle / Pedal Position Sensor / Switch "D" Circuit High Input Short to +B in the main sensor circuit

  • Wire harness or connector

  • Accelerator pedal sensor assembly

  • Hybrid vehicle control ECU assembly

 Does not come on

Master Warning Light:

Comes on
P2125-153 Throttle / Pedal Position Sensor / Switch "E" Circuit Sub sensor circuit wiring malfunction or level is not stable

  • Wire harness or connector

  • Accelerator pedal sensor assembly

  • Hybrid vehicle control ECU assembly

 Does not come on

Master Warning Light:

Comes on
P2126-109 Throttle / Pedal Position Sensor / Switch "E" Circuit Range / Performance Internal error of the sub sensor

  • Wire harness or connector

  • Accelerator pedal sensor assembly

  • Hybrid vehicle control ECU assembly

 Does not come on

Master Warning Light:

Comes on
P2127-107 Throttle / Pedal Position Sensor / Switch "E" Circuit Low Input Open or short to GND in the sub sensor circuit

  • Wire harness or connector

  • Accelerator pedal sensor assembly

  • Hybrid vehicle control ECU assembly

 Does not come on

Master Warning Light:

Comes on
P2128-108 Throttle / Pedal Position Sensor / Switch "E" Circuit High Input Short to +B in the sub sensor circuit

  • Wire harness or connector

  • Accelerator pedal sensor assembly

  • Hybrid vehicle control ECU assembly

 Does not come on

Master Warning Light:

Comes on
P2138-110 Throttle / Pedal Position Sensor / Switch "D" / "E" Voltage Correlation Difference between the main sensor value and sub sensor value is large.

  • Wire harness or connector

  • Accelerator pedal sensor assembly

  • Hybrid vehicle control ECU assembly

 Does not come on

Master Warning Light:

Comes on
P2138-154 Throttle / Pedal Position Sensor / Switch "D" / "E" Voltage Correlation Main or sub sensor circuit wiring malfunction

  • Wire harness or connector

  • Accelerator pedal sensor assembly

  • Hybrid vehicle control ECU assembly

 Does not come on

Master Warning Light:

Comes on

WIRING DIAGRAM

A01KU08E43
*a Accelerator Pedal Sensor Assembly
*b Hybrid Vehicle Control ECU Assembly

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.


      Powertrain > Hybrid Control > Data List
      Tester Display
      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 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 95%
      Not depressed → Fully depressed → Not depressed (Accelerator pedal should be operated slowly) Value changes progressively

    5. Turn the power switch off.

      Result
      Proceed to
      OK
      NG

    OK

    CHECK FOR INTERMITTENT PROBLEMS Click here

    NG

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


    1. A01KRYPC01
      *A for LHD
      *B for RHD

      Check the connector connections and contact pressure of the relevant terminals for the accelerator pedal sensor assembly connector.

      Click here

      OK
      The connectors are connected securely and there are no contact pressure problems.
      Result
      Proceed to
      OK
      NG

    NG

    CONNECT SECURELY

    OK

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

    Result
    Proceed to
    OK
    NG

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

      Click here

      OK
      The connectors are connected securely and there are no contact pressure problems.
      A01KT1OC01
      *1 for LHD *2 for RHD
      Result
      Proceed to
      OK
      NG

    NG

    CONNECT SECURELY

    OK

  4. CHECK HYBRID VEHICLE CONTROL ECU ASSEMBLY (CHECK VOLTAGE)


    1. Disconnect the A3 accelerator pedal sensor assembly connector.

    2. Turn the power switch on (IG).

    3. A01KT7GC13
      *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 Condition Specified Condition
      A3-4 (VCPA) - A3-5 (EPA) Power switch on (IG) 4.5 to 5.5 V
      A3-1 (VCP2) - A3-2 (EPA2) Power switch on (IG) 4.5 to 5.5 V

    4. Turn the power switch off.

    5. Reconnect the A3 accelerator pedal sensor assembly connector.

      Result
      Proceed to
      OK
      NG

    NG

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

    OK

  5. CHECK HYBRID VEHICLE CONTROL ECU ASSEMBLY (CHECK RESISTANCE)


    1. Disconnect the A3 accelerator pedal sensor assembly connector.

    2. A01KT7GC14
      *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 Condition Specified Condition
      A3-6 (VPA) - A3-5 (EPA) Power switch off 36.60 to 41.61 kΩ
      A3-3 (VPA2) - A3-2 (EPA2) Power switch off 36.60 to 41.61 kΩ

    3. Reconnect the A3 accelerator pedal sensor assembly connector.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE ACCELERATOR PEDAL SENSOR ASSEMBLY Click here

    NG

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

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


    1. Disconnect the A3 accelerator pedal sensor assembly connector.

    2. Disconnect the A149 hybrid vehicle control ECU assembly connector.

    3. Turn the power switch on (IG).

    4. A01KTGYC23
      *a

      Rear view of wire harness connector

      (to Hybrid Vehicle Control ECU Assembly)
      *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
      A149-9 (VCPA) - Body ground Power switch on (IG) Below 1 V
      A149-20 (EPA) - Body ground Power switch on (IG) Below 1 V
      A149-8 (VCP2) - Body ground Power switch on (IG) Below 1 V
      A149-18 (EPA2) - Body ground Power switch on (IG) Below 1 V

      Note

      Turning the power switch on (IG) with the hybrid vehicle control ECU assembly 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 Condition Specified Condition
      A149-9 (VCPA) - A3-4 (VCPA) Power switch off Below 1 Ω
      A149-20 (EPA) - A3-5 (EPA) Power switch off Below 1 Ω
      A149-8 (VCP2) - A3-1 (VCP2) Power switch off Below 1 Ω
      A149-18 (EPA2) - A3-2 (EPA2) Power switch off Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      A149-9 (VCPA) or A3-4 (VCPA) - Body ground and other terminals Power switch off 10 kΩ or higher
      A149-20 (EPA) or A3-5 (EPA) - Body ground and other terminals Power switch off 10 kΩ or higher
      A149-8 (VCP2) or A3-1 (VCP2) - Body ground and other terminals Power switch off 10 kΩ or higher
      A149-18 (EPA2) or A3-2 (EPA2) - Body ground and other terminals Power switch off 10 kΩ or higher

    7. Reconnect the A149 hybrid vehicle control ECU assembly connector.

    8. Reconnect the A3 accelerator pedal sensor assembly connector.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY for LHD: Click here
    REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY for RHD: Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

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


    1. Disconnect the A3 accelerator pedal sensor assembly connector.

    2. Disconnect the A149 hybrid vehicle control ECU assembly connector.

    3. Turn the power switch on (IG).

    4. A01KTGYC24
      *a

      Rear view of wire harness connector

      (to Hybrid Vehicle Control ECU Assembly)
      *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
      A149-30 (VPA) - Body ground Power switch on (IG) Below 1 V
      A149-28 (VPA2) - Body ground Power switch on (IG) Below 1 V
      A149-20 (EPA) - Body ground Power switch on (IG) Below 1 V
      A149-18 (EPA2) - Body ground Power switch on (IG) Below 1 V

      Note

      Turning the power switch on (IG) with the hybrid vehicle control ECU assembly 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 Condition Specified Condition
      A149-30 (VPA) - A3-6 (VPA) Power switch off Below 1 Ω
      A149-20 (EPA) - A3-5 (EPA) Power switch off Below 1 Ω
      A149-28 (VPA2) - A3-3 (VPA2) Power switch off Below 1 Ω
      A149-18 (EPA2) - A3-2 (EPA2) Power switch off Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      A149-30 (VPA) or A3-6 (VPA) - Body ground and other terminals Power switch off 10 kΩ or higher
      A149-20 (EPA) or A3-5 (EPA) - Body ground and other terminals Power switch off 10 kΩ or higher
      A149-28 (VPA2) or A3-3 (VPA2) - Body ground and other terminals Power switch off 10 kΩ or higher
      A149-18 (EPA2) or A3-2 (EPA2) - Body ground and other terminals Power switch off 10 kΩ or higher

    7. Reconnect the A149 hybrid vehicle control ECU assembly connector.

    8. Reconnect the A3 accelerator pedal sensor assembly connector.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY for LHD: Click here
    REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY for RHD: Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR