METER / GAUGE SYSTEM Speed Signal Circuit

DESCRIPTION

The vehicle speed sensor signal consists of pulses sent to the combination meter assembly from the skid control ECU.

WIRING DIAGRAM

A005WLGE01

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK ECU TERMINAL VOLTAGE (INPUT VOLTAGE)


    1. A005W2XE02
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Combination Meter Assembly)

      Disconnect the D66 meter connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      D66-3 (+S) - Body ground Ignition switch ON 4.5 to 14 V

      Tech Tips

      If any of the ECUs specified in the wiring diagram supplies power to the combination meter assembly, the combination meter assembly will output a waveform.


    NG

    CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - NO. 3 JUNCTION BLOCK) Click here

    OK

  2. CHECK COMBINATION METER ASSEMBLY (OUTPUT VOLTAGE)

    A005SXSE01
    Text in Illustration
    *1

    Front view of wire harness connector

    (to Brake Actuator Assembly)

    1. A005UWME01
      Text in Illustration
      *1 except CVT
      *2 for CVT
      *3

      Front view of wire harness connector

      (to Brake Actuator Assembly)
      *4

      Front view of wire harness connector

      (to Brake Actuator Assembly)

      w/o VSC:


      1. Disconnect the A41 brake actuator connector.

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

        Standard Voltage
        Tester Connection Switch Condition Specified Condition
        A41-23 (SP1) - Body ground Ignition switch ON 11 to 14 V

    2. w/ VSC:


      1. Disconnect the A42*1 or A43*2 brake actuator connector.

        *1: except CVT

        *2: for CVT

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

        Standard Voltage
        Tester Connection Switch Condition Specified Condition
        A42-33*1 (SP1) - Body ground Ignition switch ON 11 to 14 V
        A43-33*2 (SP1) - Body ground

        *1: except CVT

        *2: for CVT


    NG

    CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - SKID CONTROL ECU) Click here

    OK

  3. CHECK COMBINATION METER ASSEMBLY (SPEED SIGNAL)


    1. A005U7QE01
      Text in Illustration
      *1

      Component with harness connected

      (Combination Meter Assembly)

      Check the input waveform.


      1. Reconnect the D66 meter connector.

      2. Remove the combination meter assembly with the connector(s) still connected.

      3. Connect an oscilloscope to terminal D66-5 (SI) and body ground.

      4. Turn the ignition switch to ON.

      5. Turn the wheel slowly.

      6. Check the signal waveform according to the condition(s) in the table below.

        Measurement Condition
        Item Condition
        Terminal No. (Symbols) D66-5 (SI) - Body ground
        Tool setting 5 V/DIV., 20 ms./DIV.
        Condition Being driven at approx. 20 km/h (12 mph)
        OK
        The waveform is displayed as shown in the illustration.

        Tech Tips

        When the system is functioning normally, one wheel revolution generates 4 pulses. As the vehicle speed increases, the width indicated by (A) in the illustration narrows.

        Result
        Result Proceed to
        OK A
        NG (w/o VSC) B
        NG (w/ VSC) C

    B

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    C

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    A

    REPLACE COMBINATION METER ASSEMBLY Click here

  4. CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - SKID CONTROL ECU)


    1. A005UM8E01
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Combination Meter Assembly)
      *2

      Front view of wire harness connector

      (to Brake Actuator Assembly)

      w/o VSC:


      1. Disconnect the D66 meter connector.

      2. Disconnect the A41 brake actuator connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        D66-5 (SI) - A41-23 (SP1) Always Below 1 Ω
        A41-23 (SP1) - Body ground Always 10 kΩ or higher
    2. A005WBJE01
      Text in Illustration
      *1 except CVT
      *2 for CVT
      *3

      Front view of wire harness connector

      (to Combination Meter Assembly)
      *4

      Front view of wire harness connector

      (to Brake Actuator Assembly)
      *5

      Front view of wire harness connector

      (to Brake Actuator Assembly)

      w/ VSC:


      1. Disconnect the D66 meter connector.

      2. Disconnect the A42*1 or A43*2 brake actuator connectors.

        *1: except CVT

        *2: for CVT

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        D66-5 (SI) - A42-33*1 (SP1) Always Below 1 Ω
        A42-33*14 (SP1) - Body ground Always 10 kΩ or higher
        D66-5 (SI) - A43-33*2 (SP1) Always Below 1 Ω
        A43-33*2 (SP1) - Body ground Always 10 kΩ or higher

        *1: except CVT

        *2: for CVT


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE COMBINATION METER ASSEMBLY Click here

  5. CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - NO. 3 JUNCTION BLOCK)

    A005TX1E01

    1. Disconnect the D66 meter connector.

    2. Disconnect the 3B junction block connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D66-3 (+S) - 3B-18 Always Below 1 Ω
      D66-3 (+S) - Body ground Always 10 kΩ or higher
      Text in Illustration
      *1

      Front view of wire harness connector

      (to No. 3 Junction Block)

      		 *2

      Front view of wire harness connector

      (to Combination Meter Assembly)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. CHECK POWER MANAGEMENT CONTROL ECU

    A005UKNE01

    1. Disconnect the 3B junction block connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      3B-7 - Body ground Ignition switch ON 4.5 to 14 V
      Text in Illustration
      *1

      Front view of wire harness connector

      (to No. 3 Junction Block)

    NG

    CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU CIRCUIT) Click here

    OK

  7. CHECK RADIO RECEIVER ASSEMBLY

    A005SY1E01

    1. Disconnect the 3A junction block connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      3A-21 - Body ground Ignition switch ON 4.5 to 14 V
      Text in Illustration
      *1

      Front view of wire harness connector

      (to No. 3 Junction Block)

    NG

    CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY CIRCUIT) Click here

    OK

  8. CHECK NAVIGATION RECEIVER ASSEMBLY

    A005SY1E01

    1. Disconnect the 3A junction block connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      3A-21 - Body ground Ignition switch ON 4.5 to 14 V
      Text in Illustration
      *1

      Front view of wire harness connector

      (to No. 3 Junction Block)

    NG

    CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY CIRCUIT) Click here

    OK

  9. CHECK ENGINE TYPE


    1. Check the engine type.

      Engine Type Proceed to
      1AZ-FE A
      1ZR-FAE B
      2ZR-FAE C
      3ZR-FE D
      3ZR-FAE E

    B

    CHECK ECM (for 1ZR-FAE) Click here

    C

    CHECK ECM (for 2ZR-FAE) Click here

    D

    CHECK ECM (for 3ZR-FE) Click here

    E

    CHECK ECM (for 3ZR-FAE) Click here

    A

  10. CHECK ECM (for 1AZ-FE)

    A005SY1E03

    1. Disconnect the 3A junction block connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      3A-20 - Body ground Ignition switch ON 4.5 to 14 V
      Text in Illustration
      *1

      Front view of wire harness connector

      (to No. 3 Junction Block)

    NG

    CHECK HARNESS AND CONNECTOR (ECM CIRCUIT (for 1AZ-FE)) Click here

    OK

    REPLACE NO. 3 JUNCTION BLOCK

  11. CHECK ECM (for 1ZR-FAE)

    A005SY1E03

    1. Disconnect the 3A junction block connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      3A-20 - Body ground Ignition switch ON 4.5 to 14 V
      Text in Illustration
      *1

      Front view of wire harness connector

      (to No. 3 Junction Block)

    NG

    CHECK HARNESS AND CONNECTOR (ECM CIRCUIT (for 1ZR-FAE)) Click here

    OK

    REPLACE NO. 3 JUNCTION BLOCK

  12. CHECK ECM (for 2ZR-FAE)

    A005SY1E03

    1. Disconnect the 3A junction block connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      3A-20 - Body ground Ignition switch ON 4.5 to 14 V
      Text in Illustration
      *1

      Front view of wire harness connector

      (to No. 3 Junction Block)

    NG

    CHECK HARNESS AND CONNECTOR (ECM CIRCUIT (for 2ZR-FAE)) Click here

    OK

    REPLACE NO. 3 JUNCTION BLOCK

  13. CHECK ECM (for 3ZR-FE)

    A005SY1E03

    1. Disconnect the 3A junction block connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      3A-20 - Body ground Ignition switch ON 4.5 to 14 V
      Text in Illustration
      *1

      Front view of wire harness connector

      (to No. 3 Junction Block)

    NG

    CHECK HARNESS AND CONNECTOR (ECM CIRCUIT (for 3ZR-FE)) Click here

    OK

    REPLACE NO. 3 JUNCTION BLOCK

  14. CHECK ECM (for 3ZR-FAE)

    A005SY1E03

    1. Disconnect the 3A junction block connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      3A-20 - Body ground Ignition switch ON 4.5 to 14 V
      Text in Illustration
      *1

      Front view of wire harness connector

      (to No. 3 Junction Block)

    NG

    CHECK HARNESS AND CONNECTOR (ECM CIRCUIT (for 3ZR-FAE)) Click here

    OK

    REPLACE NO. 3 JUNCTION BLOCK

  15. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU CIRCUIT)

    A005W95E01

    1. Disconnect the 3B junction block connector.

    2. Disconnect the D75 power management control ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D75-23 (SPD) - 3B-7 Always Below 1 Ω
      3B-7 - Body ground Always 10 kΩ or higher
      Text in Illustration
      *1

      Front view of wire harness connector

      (to No. 3 Junction Block)

      		 *2

      Front view of wire harness connector

      (to Power Management Control ECU)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

  16. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY CIRCUIT)

    A005UJ2E01

    1. Disconnect the 3A junction block connector.

    2. Disconnect the D15 radio receiver assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D15-3 (SPD) - 3A-21 Always Below 1 Ω
      3A-21 - Body ground Always 10 kΩ or higher
      Text in Illustration
      *1

      Front view of wire harness connector

      (to No. 3 Junction Block)

      		 *2

      Front view of wire harness connector

      (to Radio Receiver Assembly)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE RADIO RECEIVER ASSEMBLY Click here

  17. CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY CIRCUIT)

    A005VT0E01

    1. Disconnect the 3A junction block connector.

    2. Disconnect the D25 navigation receiver connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D25-3 (SPD) - 3A-21 Always Below 1 Ω
      3A-21 - Body ground Always 10 kΩ or higher
      Text in Illustration
      *1

      Front view of wire harness connector

      (to No. 3 Junction Block)

      		 *2

      Front view of wire harness connector

      (to Navigation Receiver Assembly)
      Result
      Result Proceed to
      OK (w/ Navigation System for DVD) A
      OK (w/ Navigation System for HDD) B
      NG C

    B

    REPLACE NAVIGATION RECEIVER ASSEMBLY Click here

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    A

    REPLACE NAVIGATION RECEIVER ASSEMBLY Click here

  18. CHECK HARNESS AND CONNECTOR (ECM CIRCUIT (for 1AZ-FE))

    A005WKLE01

    1. Disconnect the 3A junction block connector.

    2. Disconnect the A40 ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A40-8 (SPD) - 3A-20 Always Below 1 Ω
      3A-20 - Body ground Always 10 kΩ or higher
      Text in Illustration
      *1

      Front view of wire harness connector

      (to No. 3 Junction Block)

      		 *2

      Front view of wire harness connector

      (to ECM)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE ECM Click here

  19. CHECK HARNESS AND CONNECTOR (ECM CIRCUIT (for 1ZR-FAE))

    A005WKLE02

    1. Disconnect the 3A junction block connector.

    2. Disconnect the A40 ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A40-38 (SPD) - 3A-20 Always Below 1 Ω
      3A-20 - Body ground Always 10 kΩ or higher
      Text in Illustration
      *1

      Front view of wire harness connector

      (to No. 3 Junction Block)

      		 *2

      Front view of wire harness connector

      (to ECM)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE ECM Click here

  20. CHECK HARNESS AND CONNECTOR (ECM CIRCUIT (for 2ZR-FAE))

    A005WKLE02

    1. Disconnect the 3A junction block connector.

    2. Disconnect the A40 ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A40-38 (SPD) - 3A-20 Always Below 1 Ω
      3A-20 - Body ground Always 10 kΩ or higher
      Text in Illustration
      *1

      Front view of wire harness connector

      (to No. 3 Junction Block)

      		 *2

      Front view of wire harness connector

      (to ECM)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE ECM Click here

  21. CHECK HARNESS AND CONNECTOR (ECM CIRCUIT (for 3ZR-FE))

    A005WKLE02

    1. Disconnect the 3A junction block connector.

    2. Disconnect the A40 ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A40-38 (SPD) - 3A-20 Always Below 1 Ω
      3A-20 - Body ground Always 10 kΩ or higher
      Text in Illustration
      *1

      Front view of wire harness connector

      (to No. 3 Junction Block)

      		 *2

      Front view of wire harness connector

      (to ECM)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE ECM Click here

  22. CHECK HARNESS AND CONNECTOR (ECM CIRCUIT (for 3ZR-FAE))

    A005WKLE02

    1. Disconnect the 3A junction block connector.

    2. Disconnect the A40 ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A40-38 (SPD) - 3A-20 Always Below 1 Ω
      3A-20 - Body ground Always 10 kΩ or higher
      Text in Illustration
      *1

      Front view of wire harness connector

      (to No. 3 Junction Block)

      		 *2

      Front view of wire harness connector

      (to ECM)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE ECM Click here