METER / GAUGE SYSTEM Speedometer Malfunction

DESCRIPTION

The No. 1 meter ECU receives vehicle speed signals from the skid control ECU via the CAN line. the vehicle speed sensor detects the voltage that varies according to the vehicle speed. The skid control ECU supplies power to the vehicle speed sensor. The skid control ECU detects vehicle speed signals based on the pulses of the voltage.

WIRING DIAGRAM

A001B41E04
*1 CAN Line
*2 Skid Control ECU
*3 No. 1 Meter ECU

PROCEDURE


  1. CHECK CAN COMMUNICATION SYSTEM


    1. Check for the DTC Click here.

      Result:
      Result Proceed to
      CAN communication system DTC is not output A
      CAN communication system (for LHD) DTC is output B
      CAN communication system (for RHD) DTC is output C

    B

    Go to CAN COMMUNICATION SYSTEM Click here

    C

    Go to CAN COMMUNICATION SYSTEM Click here

    A

  2. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (SPEEDOMETER)


    1. Operate the intelligent tester according to the display and select "Active Test".

      Combination Meter:
      Tester Display Test Part Control Range
      Speed Meter Operation Speedometer 0, 40, 80, 120, 160, 200, 240 or 280

      Tech Tips


      • Confirm that the vehicle is stopped and engine is idling. It is normal that door will be locked automatically when performing the speedometer Active Test.

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

      • The needle position should be within the acceptable tolerance.

      OK
      Needle indication is normal.

    NG

    REPLACE NO. 1 METER ECU

    OK

  3. READ VALUE USING INTELLIGENT TESTER (VEHICLE SPEED)


    1. Operate the intelligent tester according to the display and select "Data List".

      Combination Meter:
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      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 tester is almost the same as actual vehicle speed measured using speedometer tester (calibrated chassis dynamometer).

    OK

    REPLACE NO. 1 METER ECU

    NG

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


    1. Operate the intelligent tester according to the display and select "Data List".

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

    OK

    REPLACE NO. 1 METER ECU

    NG

    Go to ELECTRONICALLY CONTROLLED BRAKE SYSTEM Click here