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Home >> Lexus >> 2011 >> RX 350 AWD >> Repair and Diagnosis (Single Page) >> Electrical >> Gauges >> Meter / Gauge / Display (Diagnostic Codes & Symptom Tests) >> Meter / Gauge System >> Symptom Tests >> Speedometer Malfunction >> Procedure

Speedometer Malfunction: Procedure

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

      Result

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

    B → See step   6 

    A: Go to next step 

  2. PERFORM ACTIVE TEST USING TECHSTREAM (SPEED METER OPERATION) 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Body Electrical / Combination Meter / Active Test.
    5. Check the operation by referring to the table below.
      COMBINATION METER

      Tester Display Test Part Control Range Diagnostic Note
      Speed Meter Operation Speedometer 0, 40, 80, 120 mph*1 Confirm that the vehicle is stopped with the engine idling
      0, 40, 80, 120, 160, 200, 240 km/h*2
      • *1: for U.S.A.
      • *2: except U.S.A.

      OK

      Speedometer indication is normal.

    NG → See step   7 

    OK: Go to next step 

  3. READ VALUE USING TECHSTREAM (VEHICLE SPEED METER) 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Body Electrical / Combination Meter / Data List.
    5. Check the values by referring to the table below.
      COMBINATION METER

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Vehicle Speed Meter Vehicle speed/Min.: 0 mph (0 km/h), Max.: 255 km/h (158 mph) Almost the same as actual vehicle speed (Speedometer tester) -

      OK

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

    NG → See step   4 

    OK → See step   7 

  4. READ VALUE USING TECHSTREAM (FR/FL/RR/RL WHEEL SPEED) 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Chassis / ABS/VSC/TRAC / Data List.
    5. Check the values by referring to the table below.
      ABS/VSC/TRAC

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      FR Wheel Speed Vehicle speed/Min.: 0 mph (0 km/h), Max.: 326 km/h (202 mph) Almost the same as actual vehicle speed (Speedometer tester) -
      FL Wheel Speed Vehicle speed/Min.: 0 mph (0 km/h), Max.: 326 km/h (202 mph) Almost the same as actual vehicle speed (Speedometer tester) -
      RR Wheel Speed Vehicle speed/Min.: 0 mph (0 km/h), Max.: 326 km/h (202 mph) Almost the same as actual vehicle speed (Speedometer tester) -
      RL Wheel Speed Vehicle speed/Min.: 0 mph (0 km/h), Max.: 326 km/h (202 mph) Almost the same as actual vehicle speed (Speedometer tester) -

      OK

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

    NG → See step   8 

    OK: Go to next step 

  5. REPLACE SKID CONTROL ECU 
    1. Replace the skid control ECU with a new or a known good one. Refer to REMOVAL .

      OK

      The operation of the speedometer returns to normal.

    NG → See step   7 

    OK → END 

  6. GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING 
  7. REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL 
  8. GO TO BRAKE CONTROL SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING 
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