METER / GAUGE SYSTEM Tachometer Malfunction

DESCRIPTION

The No. 1 meter ECU receives engine revolution signals from the hybrid vehicle control ECU via the CAN line. The No. 1 meter ECU displays engine revolution data that is calculated based on the data received from the hybrid vehicle control ECU.

WIRING DIAGRAM

A01GYEQE49

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 (TACHOMETER OPERATION)


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

      Combination Meter
      Tester Display Test Part Control Range
      Tachometer operation Tachometer 0, 1000, 2000, 3000, 4000, 5000, 6000 or 7000
      OK
      Needle indication is normal.

    NG

    REPLACE NO. 1 METER ECU Click here

    OK

  3. READ VALUE USING INTELLIGENT TESTER (ENGINE RPM)


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

      Combination Meter
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Engine Rpm Engine speed / Min.: 0, Max.: 12750 Idling: 700 to 800 rpm Unit: rpm
      OK
      Engine speed displayed on tester is almost the same as actual engine speed.

    NG

    READ VALUE USING INTELLIGENT TESTER (ENGINE REVOLUTION) Click here

    OK

    REPLACE NO. 1 METER ECU Click here

  4. READ VALUE USING INTELLIGENT TESTER (ENGINE REVOLUTION)


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

      Hybrid Control
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Engine Revolution Engine speed / Min.: 0, Max.: 16383.75 Idling: 700 to 800 rpm Unit: rpm
      OK
      Engine speed displayed on the tester is almost the same as the actual engine speed.

    NG

    Go to HYBRID CONTROL SYSTEM Click here

    OK

  5. REPLACE NO. 1 METER ECU


    1. Temporarily replace the No. 1 meter ECU with a new one Click here.


    NEXT

  6. CHECK COMBINATION METER ASSEMBLY (TACHOMETER)


    1. Check the operation of the tachometer returns to normal Click here.

      OK
      Operation of tachometer returns to normal.

    NG

    REPLACE HYBRID VEHICLE CONTROL ECU Click here

    OK

    END (NO. 1 METER ECU IS DEFECTIVE)