METER / GAUGE SYSTEM Tachometer Malfunction

DESCRIPTION

In this circuit, the meter CPU receives engine speed signals from the ECM using the CAN communication system (CAN V1 Bus). The meter CPU displays the engine speed calculated based on the data received from the ECM.

WIRING DIAGRAM

A01VIRGE99
*1 CAN Communication Line
*2 Combination Meter Assembly

PROCEDURE


  1. CHECK CAN COMMUNICATION SYSTEM


    1. Check if a CAN communication DTC is output 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. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (TACHOMETER OPERATION)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the intelligent tester on.

    4. Enter the following menus: Body / Combination Meter / Active Test.

    5. According to the display on the intelligent tester, perform the Active Test.

      Combination Meter
      Tester Display Test Part Control Range Diagnostic Note
      TachoMeter Operation Tachometer 0/1000/2000/3000/4000/5000/6000/7000 rpm Perform the test with the vehicle stopped and the engine idling.
      OK
      Tachometer indication is normal.

    NG

    REPLACE COMBINATION METER ASSEMBLY Click here

    OK

  3. READ VALUE USING INTELLIGENT TESTER (ENGINE RPM)


    1. Connect the intelligent tester to the DLC3.

    2. Start the engine.

    3. Turn the intelligent tester on.

    4. Enter the following menus: Body / Combination Meter / Data List.

    5. According to the display on the intelligent tester, read the Data List.

      Combination Meter
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Engine Rpm

      Engine speed/

      Min.: 0

      Max.: 12750

      		 Approximately same as actual engine speed (when engine is running) Unit: rpm
      OK
      Engine speed displayed on the intelligent tester is almost the same as the tachometer indication.

      Tech Tips

      Check the engine speed when the engine is fully warmed up, and the air conditioning and all electrical accessories are off.


    NG

    REPLACE COMBINATION METER ASSEMBLY Click here

    OK

  4. CHECK ENGINE CONTROL SYSTEM


    1. Check if a engine control DTC is output.


      Result
      Result Proceed to
      Engine control DTC is not output A
      Engine control DTC is output (for 1NR-FE) B
      Engine control DTC is output (for 1KR-FE) C
      Engine control DTC is output (for 1ND-TV (w/ DPF)) D
      Engine control DTC is output (for 1ND-TV (w/o DPF)) E

    A

    REPLACE COMBINATION METER ASSEMBLY Click here

    B

    GO TO SFI SYSTEM Click here

    C

    GO TO SFI SYSTEM Click here

    D

    GO TO ECD SYSTEM Click here

    E

    GO TO ECD SYSTEM Click here