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Home >> Lexus >> 2017 >> LX 570 >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Meter / Gauge / Display - Diagnostic Codes & Symptom Tests >> Meter / Gauge System >> Speedometer Malfunction [09/2015 - ] >> Procedure

Speedometer Malfunction [09/2015 - ]: Procedure

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

      Result Proceed to
      CAN communication DTC is not output A
      CAN communication 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. CHECK VEHICLE STABILITY CONTROL SYSTEM (VEHICLE SPEED) 
    1. Check for DTCs. Refer to DTC CHECK / CLEAR [09/2015 - 08/2017] , or refer to DTC CHECK / CLEAR [08/2017 - ] ).

      OK

      No DTCs are output.

    Result: 

    NG 

    GO TO DIAGNOSTIC TROUBLE CODE CHART 

    Refer to DIAGNOSTIC TROUBLE CODE CHART [09/2015 - ] )

    Result: 

    OK 

    See step  3

  3. PERFORM ACTIVE TEST USING TECHSTREAM (SPEEDOMETER) 
    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
      Speed Meter Operation Speedometer 0, 40, 80, 120, 160, 200, 240 or 280 Perform the test with the vehicle stopped and the engine idling.
      Acceptable range (km/h or mph): [Control range → Speedometer display]
      with mph units
      • 40 mph → 39.6 to 42.4 mph
      • 80 mph → 80.4 to 83.6 mph
      • 120 mph → 121.3 to 124.5 mph

      with km/h units
      • 40 km/h → 38.8 to 43.3 km/h
      • 80 km/h → 79.5 to 84.5 km/h
      • 120 km/h → 119.6 to 125.4 km/h
      • 160 km/h → 161.4 to 166.4 km/h
      • 200 km/h → 202.4 to 207.4 km/h
      • 240 km/h → 243.4 to 248.4 km/h

      HINT: 

      • Make sure that the vehicle is stopped and the engine is idling. The doors will be locked automatically when performing the speedometer Active Test. This is a normal function.
      • The displayed value has the same units (km/h, mph) as the main scale of the vehicle speedometer.
      • The needle position should be within the acceptable tolerance.

        OK

        Needle indication is normal.

    Result: 

    NG 

    REPLACE COMBINATION METER ASSEMBLY 

    Refer to REMOVAL [09/2015 - ] )

    Result: 

    OK 

    See step  4

  4. READ VALUE USING TECHSTREAM (VEHICLE SPEED) 
    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
      Vehicle Speed Meter Vehicle speed/Min.: 0 (0), Max.: 255 (158) Almost same as actual speed (when driving) Unit: km/h (mph)

      OK

      Vehicle speed displayed on the Techstream is almost the same as actual vehicle speed measured using speedometer tester (calibrated chassis dynamometer).

    Result: 

    NG 

    REPLACE COMBINATION METER ASSEMBLY 

    Refer to REMOVAL [09/2015 - ] )

    Result: 

    OK 

    See step  5

  5. READ VALUE USING TECHSTREAM (WHEEL SPEED SENSOR) 
    1. Operate the Techstream according to the display and select the Data List. Refer to DATA LIST / ACTIVE TEST [09/2015 - ] ).
      ABS/VSC/TRAC

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      FR Wheel Speed Wheel speed sensor FR reading/Min.: 0 (0), Max.: 326 (202) Actual wheel speed A similar speed is indicated on the speedometer.
      FL Wheel Speed Wheel speed sensor FL reading/Min.: 0 (0), Max.: 326 (202) Actual wheel speed A similar speed is indicated on the speedometer.
      RR Wheel Speed Wheel speed sensor RR reading/Min.: 0 (0), Max.: 326 (202) Actual wheel speed A similar speed is indicated on the speedometer.
      RL Wheel Speed Wheel speed sensor RL reading/Min.: 0 (0), Max.: 326 (202) Actual wheel speed A similar speed is indicated on the speedometer.

      OK

      Wheel speed displayed on the Techstream is almost the same as actual wheel speed measured using speedometer tester (calibrated chassis dynamometer).

    Result: 

    OK 

    REPLACE COMBINATION METER ASSEMBLY 

    Refer to REMOVAL [09/2015 - ] )

    Result: 

    NG 

    GO TO VEHICLE STABILITY CONTROL SYSTEM 

    Refer to PRECAUTION [09/2015 - ] )