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Home >> Lexus >> 2012 >> LS 600hL >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Meter & Gauge System (Diagnostic Codes & Symptom Tests) >> Meter / Gauge System >> Symptom Tests >> Speedometer Malfunction >> Procedure

Speedometer Malfunction: Procedure

  1. CHECK CAN COMMUNICATION SYSTEM 
    1. Check for the DTC. Refer to DTC CHECK / CLEAR .
      RESULT

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

    B → See step   5 

    A: Go to next step 

  2. PERFORM ACTIVE TEST USING TECHSTREAM (SPEEDOMETER) 
    1. Operate the Techstream according to the display and select or "Active Test".
      COMBINATION METER:

      Tester Display Test Part Control Range Diagnostic Note
      Speed Meter Operation Speedometer 0, 40, 80, 120, 160, 200, 240 or 280
      • Acceptable range (mph or km/h): [Control range → Speedometer display]

        for mph

        - 40 → 40 to 43.5

        - 80 → 80 to 84.5

        - 120 → 120 to 125.5

        for km/h

        - 40 → 38 to 42

        - 80 → 78 to 84

        - 120 → 119 to 125

        - 160 → 159 to 167

        - 200 → 199 to 209

        - 240 → 239 to 251

      • Confirm that vehicle is stopped and engine is idling
      • It is normal that door will be locked automatically when performing speedometer ACTIVE TEST
      • Displayed value has same units (km/h, mph) as main scale of vehicle's speedometer
      • Needle position should be within acceptable tolerance

      OK

      Needle indication is normal.

    NG → See step   6 

    OK: Go to next step 

  3. READ VALUE USING TECHSTREAM (VEHICLE SPEED) 
    1. Operate the Techstream according to the display and select "Data List".
      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).

    NG → See step   4 

    OK → See step   9 

  4. READ VALUE USING TECHSTREAM (WHEEL SPEED SENSOR) 
    1. Operate the Techstream according to the display and select "Data List".

      OK

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

      ELECTRIC PARKING BRAKE:

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

    NG → See step   7 

    OK → See step   8 

  5. Go to CAN COMMUNICATION SYSTEM. Refer to  PRECAUTION 
  6. REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL 
  7. Go to ELECTRONICALLY CONTROLLED BRAKE SYSTEM. Refer to  PRECAUTION 
  8. REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL 
  9. REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL