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Home >> Lexus >> 2021 >> GX 460 Base >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Meter / Gauge / Display System (Diagnostic Codes & Symptom Tests) >> Meter / Gauge System >> Tachometer Malfunction [08/2019 - ] >> Procedure

Tachometer Malfunction [08/2019 - ]: Procedure

  1. CHECK CAN COMMUNICATION SYSTEM 
    1. Check if a CAN communication DTC is output.

      Refer to DIAGNOSIS SYSTEM [08/2019 - 08/2020] , or refer to DIAGNOSIS SYSTEM [08/2020 - 08/2021] , or refer to DIAGNOSIS SYSTEM [08/2021 - ]

      Result

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

    Result: 

    GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [08/2019 - ] 

    Result: 

    See step  2

  2. CHECK FOR DTC (SFI SYSTEM) 
    1. Check for DTCs.

      Refer to DTC CHECK / CLEAR [08/2015 - ]

      Result

      Result Proceed to
      SFI system DTCs are not output. A
      SFI system DTC is output. B

    Result: 

    GO TO SFI SYSTEM. Refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2019 - 08/2020]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2020 - 08/2021]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2021 - 08/2022]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2022 - ] 

    Result: 

    See step  3

  3. PERFORM ACTIVE TEST USING TECHSTREAM (TACHOMETER OPERATION) 
    1. Perform the Active Test according to the display on the Techstream.

      Refer to DATA LIST / ACTIVE TEST [08/2019 - ]

      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) -

      OK

      Speedometer indication is normal.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE ECM. Refer to  REMOVAL [08/2015 - ] 

    Result: 

    NG 

    REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [08/2019 - ]