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Home >> Lexus >> 2021 >> LX 570 >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Meter / Gauge / Display - Diagnostic Codes & Symptom Tests >> Meter / Gauge System >> Tachometer Malfunction [09/2015 - ] >> Procedure

Tachometer Malfunction [09/2015 - ]: Procedure

  1. CHECK CAN COMMUNICATION SYSTEM 
    1. Check for DTCs. Refer to DTC CHECK / CLEAR [09/2015 - ] ).
      RESULT

      Result Proceed to
      CAN communication system DTC is not output A
      CAN communication system DTC is output B

    Result: 

    B 

    GO TO CAN COMMUNICATION SYSTEM 

    Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2015 - 08/2020] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2020 - ] )

    Result: 

    A 

    See step  2

  2. PERFORM ACTIVE TEST USING TECHSTREAM (TACHOMETER) 
    1. Operate the Techstream according to the display and select the Active Test. Refer to DATA LIST / ACTIVE TEST [09/2015 - 08/2017] , or refer to DATA LIST / ACTIVE TEST [08/2017 - ] ).
      COMBINATION METER

      Tester Display Test Part Control Range Diagnostic Note
      Tachometer Operation Tachometer 0, 1000, 2000, 3000, 4000, 5000, 6000 or 7000 Perform the test with the vehicle stopped and the engine idling.

      HINT: 

      Make sure that the vehicle is stopped and the engine is idling.

      OK

      Needle indication is normal.

    Result: 

    NG 

    REPLACE COMBINATION METER ASSEMBLY 

    Refer to REMOVAL [09/2015 - ] )

    Result: 

    OK 

    See step  3

  3. READ VALUE USING TECHSTREAM (TACHOMETER) 
    1. Operate the Techstream according to the display and select the Data List. Refer to DATA LIST / ACTIVE TEST [09/2015 - 08/2017] , or refer to DATA LIST / ACTIVE TEST [08/2017 - ] ).
      COMBINATION METER

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Engine Rpm Engine speed/Min.: 0, Max.: 12750 Idling: 700 to 800 Unit: rpm

      OK

      Engine speed displayed on the Techstream is almost the same as actual engine speed.

    Result: 

    NG 

    REPLACE COMBINATION METER ASSEMBLY 

    Refer to REMOVAL [09/2015 - ] )

    Result: 

    OK 

    See step  4

  4. READ VALUE USING TECHSTREAM (ENGINE SPEED) 
    1. Operate the Techstream according to the display and select the Data List. Refer to DATA LIST / ACTIVE TEST [09/2015 - 08/2018] , or refer to DATA LIST / ACTIVE TEST [08/2018 - 08/2019] , or refer to DATA LIST / ACTIVE TEST [08/2019 - 08/2020] , or refer to DATA LIST / ACTIVE TEST [08/2020 - ] ).
      ENGINE

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Engine Rpm Engine speed / Min.: 0, Max.: 16383.75 Idling: 700 to 800 Unit: rpm
      RESULT

      Result Proceed to
      Engine speed displayed on Techstream is almost same as actual engine speed A
      Engine speed displayed on Techstream is not same as actual engine speed B

    Result: 

    A 

    REPLACE COMBINATION METER ASSEMBLY 

    Refer to REMOVAL [09/2015 - ] )

    Result: 

    B 

    GO TO SFI SYSTEM 

    Refer to PRECAUTION [09/2015 - ] )