METER / GAUGE SYSTEM Speedometer Malfunction

DESCRIPTION

The combination meter receives vehicle speed signals from the skid control ECU via the CAN line. The vehicle speed sensor outputs a voltage that varies according to the vehicle speed. The skid control ECU supplies power to the vehicle speed sensor. The skid control ECU calculates the vehicle speed based on the pulses of the voltage.

WIRING DIAGRAM

A004OS4E02
*1 Brake Actuator Assembly (Skid Control ECU)
*2 Combination Meter Assembly
*3 CAN Communication Line

PROCEDURE


  1. CHECK CAN COMMUNICATION


    1. Check for DTCs Click here.

      Result
      Result Proceed to
      CAN communication DTC is not output A
      CAN communication DTC is output B

    B

    Go to CAN COMMUNICATION SYSTEM Click here

    A

  2. CHECK BRAKE CONTROL SYSTEM (VEHICLE SPEED)


    1. Check for DTCs Click here.


    NG

    Go to DIAGNOSTIC TROUBLE CODE CHART Click here

    OK

  3. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (SPEEDOMETER)


    1. Use the Active Test to check the operation of the speedometer Click here.

      Combination Meter
      Tester Display Test Part Control Range Diagnostic Note
      Speed Meter Operation Speedometer 0, 40, 80, 120, 160, 200 or 240 Perform the test with the vehicle stopped and the engine idling.

      Tech Tips


      • Make sure that the vehicle is stopped and the engine is idling. The doors will be locked automatically when performing the speedometer Active Test. This is a normal function.

      • The displayed value has the same units (km/h, mph) as the main scale of the vehicle speedometer.

      • The needle position should be within the acceptable range.

        OK
        Needle indication is normal.

    NG

    REPLACE COMBINATION METER ASSEMBLY Click here

    OK

  4. READ VALUE USING INTELLIGENT TESTER (VEHICLE SPEED)


    1. Use the Data List to check if the speedometer is operating properly Click here.

      Combination Meter
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Vehicle Speed meter Vehicle speed/Min.: 0 (0), Max.: 255 (158) Almost same as actual speed (when driving) Unit: km/h (mph)
      OK
      Vehicle speed displayed on the intelligent tester is almost the same as actual vehicle speed measured using speedometer tester (calibrated chassis dynamometer).

    NG

    REPLACE COMBINATION METER ASSEMBLY Click here

    OK

  5. READ VALUE USING INTELLIGENT TESTER (WHEEL SPEED SENSOR)


    1. Use the Data List to check the wheel speed Click here.

      ABS/VSC/TRAC
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      FR Wheel Speed Wheel speed sensor FR reading/Min.: 0 (0), Max.: 326 (202) Actual wheel speed A similar speed is indicated on the speedometer.
      FL Wheel Speed Wheel speed sensor FL reading/Min.: 0 (0), Max.: 326 (202) Actual wheel speed A similar speed is indicated on the speedometer.
      RR Wheel Speed Wheel speed sensor RR reading/Min.: 0 (0), Max.: 326 (202) Actual wheel speed A similar speed is indicated on the speedometer.
      RL Wheel Speed Wheel speed sensor RL reading/Min.: 0 (0), Max.: 326 (202) Actual wheel speed A similar speed is indicated on the speedometer.
      OK
      Wheel speed displayed on the intelligent tester is almost the same as actual wheel speed measured using speedometer tester (calibrated chassis dynamometer).

    OK

    REPLACE COMBINATION METER ASSEMBLY Click here

    NG

    Go to VEHICLE STABILITY CONTROL SYSTEM Click here