METER / GAUGE SYSTEM Tachometer Malfunction

DTC Code DTC Name
Tachometer Malfunction

DESCRIPTION

In this circuit, the combination meter assembly receives engine speed signals from the ECM via the CAN communication system. The combination meter assembly displays the engine speed calculated based on the data received from the ECM.

WIRING DIAGRAM

E143765E85

CAUTION / NOTICE / HINT

Note:

When it is necessary to replace the combination meter assembly, be sure to replace it with a new one.

PROCEDURE

  1. CHECK CAN COMMUNICATION SYSTEM

    1. Check if CAN communication DTCs are output.

      Click hereClick here

    Result

    Result

    Proceed to

    CAN communication DTCs are not output.

    A

    CAN communication DTCs are output.

    B
    B

    GO TO CAN COMMUNICATION SYSTEM

    Click hereClick here

    A

  2. PERFORM ACTIVE TEST USING GTS (TachoMeter Operation)

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

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

    5. Perform the Active Test according to the display on the GTS.

      Body Electrical > Combination Meter > Active Test

      Tester Display

      Measurement Item

      Control Range

      Diagnostic Note

      TachoMeter Operation

      Tachometer

      OFF, 0, 1000, 2000, 3000, 4000, 5000, 6000, 7000

      -

      Body Electrical > Combination Meter > Active Test

      Tester Display

      TachoMeter Operation

      OK

      Tachometer indication is normal.

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE COMBINATION METER ASSEMBLY

    Click here

    OK

  3. READ VALUE USING GTS (Engine Rpm)

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

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

    5. Read the Data List according to the display on the GTS.

      Body Electrical > Combination Meter > Data List

      Tester Display

      Measurement Item

      Range

      Normal Condition

      Diagnostic Note

      Engine Rpm

      Engine speed

      Min.: 0 rpm, Max.: 12750 rpm

      Almost the same as actual engine speed

      -

      Body Electrical > Combination Meter > Data List

      Tester Display

      Engine Rpm

      OK

      Engine speed displayed on the GTS is almost the same as the tachometer indication.

      Tip:

      • When the data list values and tachometer values match, a signal output malfunction of the ECM or an internal malfunction of the combination meter assembly is suspected.

      • When the data list values and tachometer values do not match, an internal malfunction of the combination meter assembly is suspected.

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE COMBINATION METER ASSEMBLY

    Click here

    OK

  4. CHECK FOR DTC

    1. Check if SFI System DTCs are output.

      for 1KR-FE:Click here

      for 1PP:Click here

      Powertrain > Engine and ECT > Trouble Codes

    Result

    Result

    Proceed to

    SFI system DTCs are not output.

    A

    SFI system DTCs are output.

    B
    B

    GO TO SFI SYSTEM

    for 1KR-FE:Click here

    for 1PP:Click here

    A

  5. READ VALUE USING GTS (Engine Speed, Engine Rpm)

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus:

      1. for 1KR-FE:

        for Engine and ECT: Powertrain / Engine and ECT / Data List.

      2. for 1PP:

        for Engine: Powertrain / Engine / Data List.

      3. for Combination Meter: Body Electrical / Combination Meter / Data List.

    5. Read the Data List according to the display on the GTS.

      1. Engine and ECT (for 1KR-FE)

        Powertrain > Engine and ECT > Data List

        Tester Display

        Measurement Item

        Range

        Normal Condition

        Diagnostic Note

        Engine Speed

        Engine speed

        Min.: 0 rpm, Max.: 16383 rpm

        790 to 890 rpm: Idling

        When the crankshaft position sensor is malfunctioning, "Engine Speed" is approximately 0 rpm or varies greatly from the actual engine speed.

        Powertrain > Engine and ECT > Data List

        Tester Display

        Engine Speed

      2. Engine (for 1PP)

        Powertrain > Engine > Data List

        Tester Display

        Measurement Item

        Range

        Reference Value

        Engine Regime

        Engine speed

        Min.: 0 rpm, Max.: 8000 rpm

        846 rpm:

        Idle (warmed up)

        Powertrain > Engine > Data List

        Tester Display

        Engine Regime

      3. Combination Meter

        Body Electrical > Combination Meter > Data List

        Tester Display

        Measurement Item

        Range

        Normal Condition

        Diagnostic Note

        Engine Rpm

        Engine speed

        Min.: 0 rpm, Max.: 12750 rpm

        Almost the same as actual engine speed

        -

        Body Electrical > Combination Meter > Data List

        Tester Display

        Engine Rpm

    Result

    Result

    Proceed to

    The data list values of the ECUs do not match.

    A

    The data list values of the ECUs match.

    B
    Tip:

    • When the data list values of the ECUs match, an internal malfunction of the ECM is suspected.

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

    B

    REPLACE ECM

    for 1KR-FE:Click here

    for 1PP:Click here

    A

  6. REPLACE COMBINATION METER ASSEMBLY

    1. Replace the combination meter assembly with a new or known good one.

      Click here

      OK

      The operation of the tachometer returns to normal.

    Result

    Proceed to

    OK

    NG
    OK

    END

    NG

    REPLACE ECM

    for 1KR-FE:Click here

    for 1PP:Click here