METER / GAUGE SYSTEM Tachometer Malfunction

DESCRIPTION

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

WIRING DIAGRAM

B008LBFE02
*1 CAN Communication Line
*2 Combination Meter Assembly

CAUTION / NOTICE / HINT

Note


  • Before replacing the ECM, refer to Service Bulletin.

  • When replacing the combination meter assembly, always replace it with a new one. If a combination meter assembly which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.

PROCEDURE


  1. CHECK FOR DTC (METER / GAUGE SYSTEM)


    1. Check for DTCs.

      Click here

      Result
      Result Proceed to
      DTCs are not output. A
      DTCs are output. B

    B

    GO TO DIAGNOSTIC TROUBLE CODE CHART Click here

    A

  2. CHECK FOR DTC (SFI SYSTEM)


    1. Check for DTCs.


      Result
      Result Proceed to
      DTCs are not output. A
      DTCs are output. (for 8NR-FTS) B
      DTCs are output. (for 3ZR-FAE) C

    B

    GO TO DIAGNOSTIC TROUBLE CODE CHART Click here

    C

    GO TO DIAGNOSTIC TROUBLE CODE CHART Click here

    A

  3. 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: Powertrain / Engine / Data List. (for 8NR-FTS)

      2. for Engine: Powertrain / Engine and ECT / Data List. (for 3ZR-FAE)

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

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


      1. Engine. (for 8NR-FTS)


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

        • for 8NR-FTS with CVT: 680 to 780 rpm: Idling with warm engine

        • for 8NR-FTS with Manual Transaxle: 600 to 700 rpm: Idling with warm engine

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

        Powertrain > Engine > Data List
        Tester Display
        Engine Speed

      2. Engine and ECT (for 3ZR-FAE)


        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 710 to 810 rpm: Idling with warm engine 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

      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 tachometer -

        Body Electrical > Combination Meter > Data List
        Tester Display
        Engine Rpm
        Result
        Result Proceed to
        The Data List values of the ECUs do not match (for 8NR-FTS) A
        The Data List values of the ECUs do not match (for 3ZR-FAE) B
        The Data List values of the ECUs match C

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


    A

    REPLACE ECM Click here

    B

    REPLACE ECM Click here

    C

    REPLACE COMBINATION METER ASSEMBLY Click here