METER / GAUGE SYSTEM Tachometer Malfunction

DESCRIPTION

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

WIRING DIAGRAM

A01TC55E85
*1 Combination Meter Assembly (Meter Circuit Plate)
*2 CAN Communication Line

PROCEDURE


  1. CHECK CAN COMMUNICATION SYSTEM


    1. Check if CAN communication DTCs are output.

      Click 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 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* -

      • *: for Gasoline


      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 for Hatchback, Wagon: Click here
    REPLACE COMBINATION METER ASSEMBLY for Sedan: 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.

      Tech Tips


      • When the Data List values and tachometer values match, a signal output error 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 for Hatchback, Wagon: Click here
    REPLACE COMBINATION METER ASSEMBLY for Sedan: Click here

    OK

  4. CHECK FOR DTC


    1. Check if SFI system or ECD system DTCs are output.

      SFI system for 1NR-FE: Click here

      SFI system for 1ZR-FAE: Click here

      SFI system for 2ZR-FE: Click here

      SFI system for 1ZR-FE: Click here

      SFI system for 8NR-FTS: Click here

      ECD system for 1ND-TV (w/ Glow Plug Controller): Click here

      ECD system for 1ND-TV (w/o Glow Plug Controller): Click here

      ECD system for 1WW: Click here

      Result
      Result Proceed to
      DTCs are not output. A
      DTCs are output (for SFI system). B
      DTCs are output (for ECD system). C

    B

    GO TO SFI SYSTEM for 1NR-FE: Click here
    GO TO SFI SYSTEM for 1ZR-FAE: Click here
    GO TO SFI SYSTEM for 2ZR-FE: Click here
    GO TO SFI SYSTEM for 1ZR-FE: Click here
    GO TO SFI SYSTEM for 8NR-FTS: Click here

    C

    GO TO ECD SYSTEM for 1ND-TV (w/ Glow Plug Controller): Click here
    GO TO ECD SYSTEM for 1ND-TV (w/o Glow Plug Controller): Click here
    GO TO ECD SYSTEM for 1WW: 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 Engine and ECT: Powertrain / Engine and ECT / Data List.

      2. 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 Gasoline)


        Powertrain > Engine and ECT > Data List
        Tester Display Measurement Item Range Normal Condition Reference Value Diagnostic Note
        Engine Speed Engine speed Min.: 0 rpm, Max.: 16383 rpm

        for 1NR-FE, 2ZR-FE, 1ZR-FE:

        600 to 700 rpm: Idling

        for 1ZR-FAE:


        • 680 to 780 rpm: Idling (for CVT models)

        • 580 to 680 rpm: Idling (for manual transaxle models)

        for 8NR-FTS:


        • 680 to 780 rpm: Idling (shift lever in N, engine warmed up and A/C off) (CVT models)

        • 600 to 700 rpm: Idling (shift lever in neutral, engine warmed up and A/C off) (M/T models)

        for 1NR-FE, 2ZR-FE, 1ZR-FE:

        -

        for 1ZR-FAE:

        Idling (engine warmed up and A/C off): 747 rpm

        for 8NR-FTS:

        Idling (engine warmed up and A/C off): 710 rpm (CVT models)

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

        except 1ZR-FAE, 8NR-FTS:

        Stored as freeze frame data: Yes

        Powertrain > Engine and ECT > Data List
        Tester Display
        Engine Speed

      2. Engine and ECT (for Diesel)


        Powertrain > Engine and ECT > Data List
        Tester Display Measurement Item Type Range Normal Condition Reference Value Diagnostic Note
        Engine Speed Engine speed

        for 1ND-TV:

        Sensor output (crankshaft position sensor)

        for 1WW:

        -

        		 Min.: 0 rpm, Max.: 16383 rpm

        for 1ND-TV:

        Idling with warm engine: 720 to 820 rpm

        for 1WW:

        -

        for 1ND-TV (w/ Glow Plug Controller):

        Idling ("Coolant Temp" = 77°C [171°F]): 770 rpm

        for 1ND-TV (w/o Glow Plug Controller):

        Idling ("Coolant Temp" = 75°C [167°F]): 770 rpm

        for 1WW:

        Idling (warm up the engine): 830 rpm

        for 1ND-TV:

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

        Cause of Out of Range:


        • Crankshaft position sensor

        • Crankshaft position sensor circuit

        for 1WW:

        -

        Powertrain > Engine and ECT > Data List
        Tester Display
        Engine Speed

      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

      Tech Tips


      • 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 error of the ECM or an internal malfunction of the combination meter assembly is suspected.


    B

    REPLACE ECM for 1NR-FE: Click here
    REPLACE ECM for 1ZR-FAE: Click here
    REPLACE ECM for 2ZR-FE: Click here
    REPLACE ECM for 1ZR-FE: Click here
    REPLACE ECM for 8NR-FTS: Click here
    REPLACE ECM for 1ND-TV (w/ Glow Plug Controller): Click here
    REPLACE ECM for 1ND-TV (w/o Glow Plug Controller): Click here
    REPLACE ECM for 1WW: Click here

    A

  6. REPLACE COMBINATION METER ASSEMBLY


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

      for Hatchback, Wagon: Click here

      for Sedan: Click here

      OK
      The operation of the tachometer returns to normal.
      Result
      Proceed to
      OK
      NG

    OK

    END

    NG

    REPLACE ECM for 1NR-FE: Click here
    REPLACE ECM for 1ZR-FAE: Click here
    REPLACE ECM for 2ZR-FE: Click here
    REPLACE ECM for 1ZR-FE: Click here
    REPLACE ECM for 8NR-FTS: Click here
    REPLACE ECM for 1ND-TV (w/ Glow Plug Controller): Click here
    REPLACE ECM for 1ND-TV (w/o Glow Plug Controller): Click here
    REPLACE ECM for 1WW: Click here