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

A01GYEQE02

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK CAN COMMUNICATION SYSTEM


    1. Check for DTC Click here [for LHD], Click here [for RHD]).

      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 (SPEED METER OPERATION)


    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
      OK
      Needle indication is normal.

    NG

    REPLACE NO. 1 METER ECU Click here

    OK

  3. READ VALUE USING INTELLIGENT TESTER (VEHICLE SPEED METER)


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

      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 tester is almost the same as actual vehicle speed measured using speedometer tester (calibrated chassis dynamometer).

    NG

    READ VALUE USING INTELLIGENT TESTER (WHEEL SPEED) Click here

    OK

    REPLACE NO. 1 METER ECU Click here

  4. READ VALUE USING INTELLIGENT TESTER (WHEEL SPEED)


    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).

    NG

    Go to ELECTRONICALLY CONTROLLED BRAKE SYSTEM Click here

    OK

    REPLACE NO. 1 METER ECU Click here