METER / GAUGE SYSTEM Tachometer Malfunction

DESCRIPTION

The combination meter assembly receivers engine speed signals from the ECM via the CAN communication line. The combination meter assembly displays engine speed data that is calculated based on the data received from the ECM.

WIRING DIAGRAM

A01BFXFE01

INSPECTION PROCEDURE

Note


  • Before starting following inspection, check if the SFI system*1 or ECD*2 system troubleshooting.


    • *1: for 1TR-FE, 2TR-FE

    • *2: for 1KD-FTV, 2KD-FTV, 5L-E


  • The meter/gauge system uses the CAN communication system communication system. First inspect the communication systems by following How to Proceed with Troubleshooting Click here. Troubleshoot the meter/gauge system after confirming that the communication systems are functioning properly.

PROCEDURE


  1. CHECK FOR DTC (SFI SYSTEM*1 OR ECD SYSTEM*2)


    • *1: for 1TR-FE, 2TR-FE

    • *2: for 1KD-FTV, 2KD-FTV, 5L-E


    1. Clear the DTCs Click here.

    2. Check for DTCs Click here.

      OK
      SFI system *1 or ECD*2 system communication system DTCs are not output.
      Result
      Result Proceed to
      OK A
      NG (for 1TR-FE) B
      NG (for 2TR-FE)
      NG (for 1KD-FTV) C
      NG (for 2KD-FTV)
      NG (for 5L-E)

      Tech Tips

      *: Go to procedure;



    B

    GO TO SFI SYSTEM*

    C

    GO TO ECD SYSTEM*

    A

  2. PERFORM ACTIVE TEST USING GTS (TACHOMETER)


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

      Combination Meter
      Tester Display Test Part Control Range Diagnostic Note
      Tacho Meter Operation Tachometer OFF, 0, 1000, 2000, 3000, 4000, 5000, 6000 or 7000 (rpm) -

      Tech Tips

      Make sure that the vehicle is stopped and the engine is idling.

      OK
      Needle indication is normal.

    NG

    REPLACE COMBINATION METER ASSEMBLY Click here

    OK

  3. READ VALUE USING GTS (ENGINE SPEED)


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

      Combination Meter
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Engine Rpm Engine speed / Min.: 0 rpm, Max.: 12750 rpm Actual engine speed -
      OK
      Engine speed displayed on the GTS is almost the same as the actual engine speed.

    NG

    REPLACE COMBINATION METER ASSEMBLY Click here

    OK

  4. READ VALUE USING GTS


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

      Combination Meter
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Engine Rpm Engine speed / Min.: 0 rpm, Max.: 12750 rpm Actual engine speed -
      Engine and ECT
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Engine Speed Engine speed / Min.: 0 rpm, Max.: 16383 rpm 650 to 750 rpm: When idling -
      OK
      The data list values of the ECUs match.

      Tech Tips


      • When the Data List values of the ECUs match, an internal malfunction of the combination meter assembly is suspected.

      • When the Data List values of the ECUs do not match, a signal output error of the ECM or an internal malfunction of the combination meter assembly is suspected.

      *: Replacement procedure;



    NG

    REPLACE ECM*

    OK

  5. CHECK COMBINATION METER ASSEMBLY


    1. Temporarily replace the combination meter assembly with a new one or normally functioning one Click here.

    2. Check that the operation of the tachometer returns to normal Click here.

      Tech Tips

      *: Replacement procedure;



    NG

    REPLACE ECM*

    OK

    END (COMBINATION METER ASSEMBLY IS DEFECTIVE)