METER / GAUGE SYSTEM Tachometer Malfunction

DESCRIPTION

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

WIRING DIAGRAM

A01V9N5E17
*1 Combination Meter Assembly
*2 CAN Communication Line

CAUTION / NOTICE / HINT

Note

When replacing the combination meter assembly, make sure to replace it with a new one.

PROCEDURE


  1. CHECK FOR DTC


    1. Check for DTCs.

      Click here

      OK
      DTCs U0100, U0129, U0131, U0142, U0151, U0163, U023A and U1104 are not output.
      Result
      Proceed to
      OK
      NG

    NG

    GO TO CAN COMMUNICATION SYSTEM for LHD with Central Gateway ECU: Click here for RHD with Central Gateway ECU: Click here for LHD without Central Gateway ECU: Click here for RHD without Central Gateway ECU: Click here

    OK

  2. CHECK SFI SYSTEM OR ECD SYSTEM


    • *1: Engine Type Gasoline

    • *2: Engine Type Diesel


    1. Check if a SFI system*1 or ECD system*2 DTC is output.

      ECD system (2AD-FHV): Click here

      ECD system (2AD-FTV [for CCo]): Click here

      ECD system (2AD-FTV [for DPF]): Click here

      ECD System (2WW): Click here

      SFI system (2AR-FE [w/ Canister Pump Module]): Click here

      SFI system (2AR-FE [w/o Canister Pump Module]): Click here

      SFI system (3ZR-FAE): Click here

      SFI system (3ZF-FE [for K111, K111F]): Click here

      SFI system (3ZF-FE [except K111, K111F]): Click here


      Powertrain > Engine and ECT > Trouble Codes
      OK
      DTC is not output
      Result
      Proceed to
      OK
      NG (Engine Type Gasoline)
      NG (Engine Type Diesel)

    NG (Engine Type Gasoline)

    GO TO SFI SYSTEM for 2AR-FE (w/ Canister Pump Module): Click here for 2AR-FE (w/o Canister Pump Module): Click here for 3ZR-FAE: Click here for 3ZR-FE (for K111, K111F) : Click here for 3ZR-FE (except K111, K111F) : Click here

    NG (Engine Type Diesel)

    GO TO ECD SYSTEM for 2AD-FHV: Click here for 2AD-FTV (for CCo): Click here for 2AD-FTV (for DPF): Click here for 2WW: Click here

    OK

  3. PERFORM ACTIVE TEST USING GTS (TACHOMETER OPERATION)


    1. Using the GTS, perform the Active Test.

      Click here


      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 or 7000 (rpm) -

      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

  4. READ VALUE USING GTS (ENGINE RPM, ENGINE SPEED)


    1. Using the GTS, read the Data List.

      Click here


      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 Actual engine speed -

      Powertrain > Engine and ECT
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Engine Speed Engine speed Min.: 0 rpm, Max.: 16383 rpm 750 to 850 rpm: Idling with warm engine -

      Powertrain > Engine > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Engine Speed Engine speed Min.: 0 rpm, Max.: 16383 rpm 750 to 850 rpm: Idling with warm engine -

      Body Electrical > Combination Meter > Data List
      Tester Display
      Engine Rpm

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

      Powertrain > Engine > Data List
      Tester Display
      Engine Speed

      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.

      Result
      Proceed to
      The Data List values of the ECUs do not match
      The Data List values of the ECUs match

    The Data List values of the ECUs do not match

    REPLACE COMBINATION METER ASSEMBLY Click here

    The Data List values of the ECUs match

  5. CHECK COMBINATION METER ASSEMBLY


    1. Replace the combination meter assembly with a new or normally functioning one.

      Click here

    2. CHeck that the operation of the tachometer returns to normal.

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

    OK

    END (COMBINATION METER ASSEMBLY WAS DEFECTIVE)

    NG

    REPLACE ECM for 2AD-FHV: Click here for 2AD-FTV: Click here for 2AR-FE: Click here for 2WW: Click here for 3ZR-FAE: Click here for 3ZR-FE: Click here