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

A01KEZOE01

INSPECTION PROCEDURE

Note

Inspect the fuses for circuits related to this system before performing the following inspection procedures.

PROCEDURE


  1. INSPECT COMBINATION METER ASSEMBLY

    A01KFANE12

    1. Check the input signal waveform.


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

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

      3. Start the engine.

      4. A01KG66E50
        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 msec./DIV.
        Vehicle condition Driving at approximately 20 km/h (12 mph)
        OK
        The waveform is displayed 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 Click here

  2. INSPECT COMBINATION METER ASSEMBLY

    A01KFANE13
    Text in Illustration
    *a

    Component with harness connected

    (Combination Meter Assembly)

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

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

    NG

    REPLACE COMBINATION METER ASSEMBLY Click here

    OK

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

    A01KHPYE04
    Text in Illustration
    *a

    Front view of wire harness connector

    (to Speedometer Sensor)
    *b

    Rear view of wire harness connector

    (to Combination Meter Assembly)

    1. Disconnect Connector C13 of the combination meter assembly.

    2. Disconnect Connector S1 of the speedometer sensor.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      C13-28 - S1-1 Always Below 1 Ω
      C13-36 - S1-3 Always Below 1 Ω
      C13-5 - S1-2 Always Below 1 Ω
      C13-36 - Body ground Always 10 kΩ or higher

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

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

    5. Reconnect the connector of the combination meter assembly.

    6. Reconnect the connector of the speedometer sensor.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE SPEEDOMETER SENSOR Click here