METER / GAUGE SYSTEM (for 1KD-FTV) Speedometer Malfunction

DESCRIPTION

The combination meter assembly controls the speedometer in accordance with vehicle speed signals from the speedometer sensor.

WIRING DIAGRAM

A01KIB5E02

INSPECTION PROCEDURE

PROCEDURE


  1. INSPECT COMBINATION METER ASSEMBLY

    A01KI8VE18

    1. Check the input signal waveform.


      1. Remove the combination meter assembly with the connectors still connected.

      2. Connect the oscilloscope to terminals C13-36 and body ground.

      3. Start the engine.

      4. A01KG66E31
        Text in Illustration
        *a

        Component with harness connected

        (Combination Meter Assembly)

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

        Item Condition
        Tool setting 5 V/DIV, 20 ms/DIV
        Vehicle condition Driving at approximately. 20 km/h (12 mph)
        OK
        AS shown in the illustration

      Tech Tips

      As the vehicle speed increases, the cycle of the signal waveform narrows.


    NG

    INSPECT COMBINATION METER ASSEMBLY Click here

    OK

    REPLACE COMBINATION METER ASSEMBLY

  2. INSPECT COMBINATION METER ASSEMBLY

    A01KI8VE19
    Text in Illustration
    *a

    Component with harness connected

    (Combination Meter Assembly)

    1. Measure the resistance.

      Standard resistance
      Tester Connection Specified condition
      C13-5 - Body ground Below 1 Ω

    NG

    REPLACE COMBINATION METER ASSEMBLY

    OK

  3. CHECK HARNESS AND CONNECTOR (SPEED SENSOR - COMBINATION METER ASSEMBLY)

    A01KEOXE04
    Text in Illustration
    *a

    Front view of wire harness connector

    (to Speed Sensor)
    *b

    Rear view of wire harness connector

    (to Combination Meter Assembly)

    1. Disconnect the C13 combination meter connector.

    2. Disconnect the S1 speed sensor connector.

    3. Measure the resistance.

      Standard resistance
      Tester Connection Specified Condition
      C13-36 - S1-3 Below 1 Ω
      C13-5 - S1-2 Below 1 Ω
      C13-36 - Body ground 10 kΩ or higher

    4. Measure the voltage.

      Standard voltage
      Tester Connection Condition Specified Condition
      S1-1 - Body ground Ignition switch OFF → ON Below 1 V → 11 to 14 V

    5. Reconnect the connectors.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE SPEED SENSOR