METER / GAUGE SYSTEM Tachometer Malfunction

DESCRIPTION

In this circuit, the meter CPU receives engine revolution signals from the ECM using the CAN communication lines (CAN No. 1 Bus). The meter CPU displays engine revolution data that is calculated based on the data received from the ECM.

WIRING DIAGRAM

A017F77E06

INSPECTION PROCEDURE

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


    1. Connect the intelligent tester to the DLC3.

    2. Ignition switch on (IG).

    3. Turn the tester on.

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

    5. Check the operation by referring to the table below.

      Combination Meter:
      Tester Display Test Part Control Range Diagnostic Note
      Tacho Meter Operation Tachometer 0, 1000, 2000, 3000, 4000, 5000, 6000, 7000 (rpm) -
      OK
      Needle indication is normal.

    NG

    REPLACE COMBINATION METER ASSEMBLY Click here

    OK

  3. READ VALUE USING INTELLIGENT TESTER (ENGINE SPEED SIGNAL)


    1. Connect the intelligent tester to the DLC3.

    2. Start the engine.

    3. Turn the tester on.

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

    5. Check the values by referring to the table below.

      Combination Meter:
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Engine Rpm Engine speed/Min.: 0 rpm, Max.: 12750 rpm Almost same as actual engine speed (When engine is running) If data received from the ECM exceeds the range that can be displayed on the meter, the meter continues to display the maximum value of the range.
      OK
      Engine speed displayed on the tester is almost the same as the actual engine speed.

    NG

    READ VALUE USING INTELLIGENT TESTER (ENGINE SPEED SIGNAL) Click here

    OK

    REPLACE COMBINATION METER ASSEMBLY Click here

  4. READ VALUE USING INTELLIGENT TESTER (ENGINE SPEED SIGNAL)


    1. Connect the intelligent tester to the DLC3.

    2. Ignition switch on (IG).

    3. Turn the tester ON.

    4. Enter the following menus: Powertrain / Engine and ECT / Data List.

    5. Check the values by referring to the table below.

      Engine and ECT:
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Engine Speed Engine speed/Min.: 0 rpm, Max.: 16383.75 rpm Almost same as actual engine speed (When engine is running) -
      OK
      Engine speed displayed on the tester is almost the same as the actual engine speed.

    NG

    GO TO SFI SYSTEM Click here

    OK

  5. REPLACE ECM


    1. Replace the ECM with a new or a normal one Click here for 2GR-FE).

      OK
      The operation of the tachometer returns to normal.

    NG

    REPLACE COMBINATION METER ASSEMBLY Click here

    OK

    END