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

Info Added 2017-08-02

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.

B001VJHE57
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 assembly
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

B001VIPE75
*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.

    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. B001VDAE01
      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 Click here.

      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 ASSEMBLY CONNECTOR)


    1. A0005OEE01
      Text in Illustration
      *A for LHD
      *B for RHD

      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.

    NG

    CONNECT SECURELY

    OK

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


    1. Disconnect the A30 accelerator pedal sensor assembly connector.

    2. Turn the power switch on (IG).

    3. B001VEME01
      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 Condition Specified Condition
      A30-4 (VCP1) - A30-5 (EP1) Power switch on (IG) 4.5 to 5.5 V
      A30-1 (VCP2) - A30-2 (EP2) Power switch on (IG) 4.5 to 5.5 V

    4. Turn the power switch off.

    5. Reconnect the A30 accelerator pedal sensor assembly connector.


    NG

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

    OK

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


    1. Disconnect the A30 accelerator pedal sensor assembly connector.

    2. B001VIRE01
      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 Condition Specified Condition
      A30-6 (VPA1) - A30-5 (EP1) Power switch off 36.60 to 41.61 kΩ
      A30-3 (VPA2) - A30-2 (EP2) Power switch off 36.60 to 41.61 kΩ

    3. Reconnect the A30 accelerator pedal sensor assembly connector.


    OK

    REPLACE ACCELERATOR PEDAL SENSOR ASSEMBLY Click here

    NG

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


    1. Disconnect the A30 accelerator pedal sensor assembly connector.

    2. B001VBME03
      Text in Illustration
      *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)

      Disconnect the A78 hybrid vehicle control ECU assembly connector.

    3. Turn the power switch on (IG).

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A78-30 (VPA1) - Body ground Power switch on (IG) Below 1 V
      A78-28 (VPA2) - Body ground Power switch on (IG) Below 1 V
      A78-20 (EP1) - Body ground Power switch on (IG) Below 1 V
      A78-18 (EP2) - 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
      A78-30 (VPA1) - A30-6 (VPA1) Power switch off Below 1 Ω
      A78-20 (EP1) - A30-5 (EP1) Power switch off Below 1 Ω
      A78-28 (VPA2) - A30-3 (VPA2) Power switch off Below 1 Ω
      A78-18 (EP2) - A30-2 (EP2) Power switch off Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      A78-30 (VPA1) or A30-6 (VPA1) - Body ground and other terminals Power switch off 10 kΩ or higher
      A78-20 (EP1) or A30-5 (EP1) - Body ground and other terminals Power switch off 10 kΩ or higher
      A78-28 (VPA2) or A30-3 (VPA2) - Body ground and other terminals Power switch off 10 kΩ or higher
      A78-18 (EP2) or A30-2 (EP2) - Body ground and other terminals Power switch off 10 kΩ or higher

    7. Reconnect the A78 hybrid vehicle control ECU assembly connector.

    8. Reconnect the A30 accelerator pedal sensor assembly connector.


    OK

    REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

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


    1. Disconnect the A30 accelerator pedal sensor assembly connector.

    2. Disconnect the A78 hybrid vehicle control ECU assembly connector.

    3. Turn the power switch on (IG).

    4. B001VBME04
      Text in Illustration
      *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
      A78-9 (VCP1) - Body ground Power switch on (IG) Below 1 V
      A78-20 (EP1) - Body ground Power switch on (IG) Below 1 V
      A78-8 (VCP2) - Body ground Power switch on (IG) Below 1 V
      A78-18 (EP2) - 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
      A78-9 (VCP1) - A30-4 (VCP1) Power switch off Below 1 Ω
      A78-20 (EP1) - A30-5 (EP1) Power switch off Below 1 Ω
      A78-8 (VCP2) - A30-1 (VCP2) Power switch off Below 1 Ω
      A78-18 (EP2) - A30-2 (EP2) Power switch off Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      A78-9 (VCP1) or A30-4 (VCP1) - Body ground and other terminals Power switch off 10 kΩ or higher
      A78-20 (EP1) or A30-5 (EP1) - Body ground and other terminals Power switch off 10 kΩ or higher
      A78-8 (VCP2) or A30-1 (VCP2) - Body ground and other terminals Power switch off 10 kΩ or higher
      A78-18 (EP2) or A30-2 (EP2) - Body ground and other terminals Power switch off 10 kΩ or higher

    7. Reconnect the A78 hybrid vehicle control ECU assembly connector.

    8. Reconnect the A30 accelerator pedal sensor assembly connector.


    OK

    REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR