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Home >> Lexus >> 2019 >> LS 500 Base, RWD >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Meter / Gauge System - Diagnostics - Introduction (1 Of 2) >> Meter / Gauge System >> Operation Check [10/2020 - 10/2023] >> Operation Check [10/2020 - 10/2023]

Operation Check [10/2020 - 10/2023]

  1. INSPECT COMBINATION METER ASSEMBLY 
    1. Check speedometer operation
      NOTE:
      • The combination meter assembly receives the vehicle speed signal from the skid control ECU via CAN communication. Therefore, perform the following inspection referring to values on the Data List of the skid control ECU because it is the source of the vehicle speed signal.
      • Data List values of the skid control ECU are used for this inspection. Therefore, make sure to perform this inspection after confirming that DTCs are not output.
      1. Warm up the engine.
      2. Connect the Techstream to the DLC3.
      3. Turn the engine switch on (IG).
      4. Turn the Techstream on.
      5. Enter the following menus: Chassis / Brake/EPB / Data List. (w/ Vacuum Brake Booster)
      6. Enter the following menus: Chassis / ABS/VSC/TRAC / Data List. (w/o Vacuum Brake Booster)
      7. Read the Data List according to the display on the Techstream.

        w/ Vacuum Brake Booster:

        Chassis > Brake/EPB > Data List 

        Tester Display Measurement Item Range Normal Condition Diagnostic Note
        Vehicle Speed Maximum wheel speed sensor reading Min.: 0.0 km/h (0.0 mph)
        Max.: 6553.5 km/h (4072 mph)        		 Vehicle stopped: 0.0 km/h (0.0 mph) When driving at constant speed: No large fluctuations

        Chassis > Brake/EPB > Data List 

        Tester Display
        Vehicle Speed

        w/o Vacuum Brake Booster:

        Chassis > ABS/VSC/TRAC > Data List 

        Tester Display Measurement Item Range Normal Condition Diagnostic Note
        Vehicle Speed Maximum wheel speed sensor reading Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph) Vehicle stopped: 0 km/h (0 mph) When driving at constant speed: No large fluctuations

        Chassis > ABS/VSC/TRAC > Data List 

        Tester Display
        Vehicle Speed
        REFERENCE MPH

        Techstream Indication (mph) Acceptable Range (mph)
        20 19.4 to 21.9
        40 39.9 to 42.7
        60 60.5 to 63.3
        80 80.9 to 84.1
        100 101.6 to 104.8
        120 122.2 to 125.4
        140 142.9 to 146.1
        160 163.5 to 166.7
        REFERENCE KM/H

        Techstream Indication (km/h) Acceptable Range (km/h)
        20 18.6 to 22.6
        40 39.1 to 43.6
        60 59.7 to 64.2
        80 80.0 to 85.0
        100 100.7 to 105.7
        120 121.3 to 126.3
        140 142.0 to 147.0
        160 162.6 to 167.6
        180 183.2 to 188.2
        200 203.9 to 208.9
        220 224.5 to 229.5
        240 245.1 to 250.1
        260 265.8 to 270.8
        280 286.4 to 291.4

        OK

        Speedometer reading is within the acceptable range at each vehicle speed.

    2. Check tachometer
      1. Warm up the engine.
      2. Connect the Techstream to the DLC3.
      3. Turn the engine switch on (IG).
      4. Turn the Techstream on.
      5. for Engine Control: Powertrain / Engine / Data List.
      6. Read the Data List according to the display on the Techstream.

        Powertrain > Engine > Data List 

        Tester Display Measurement Item Range Normal Condition Diagnostic Note
        Engine Speed Engine speed Min.: 0 rpm, Max.: 16383 rpm While driving at a constant speed:
        No significant fluctuation        		 -

        Powertrain > Engine > Data List 

        Tester Display
        Engine Speed

        Reference

        Techstream Indication (rpm) Acceptable Range (rpm)
        Data in () is for Reference
        700 630 to 770
        1000 (900 to 1100)
        2000 (1850 to 2150)
        3000 2800 to 3200
        4000 (3800 to 4200)
        5000 4800 to 5200
        6000 (5750 to 6250)
        7000 6700 to 7300
        8000 (7700 to 8300)

        OK

        Tachometer reading is within the acceptable range at each engine speed.

    3. Check LED illumination (LED check)
      1. Check the illumination function of the warning or indicator lights listed below when turning the engine switch on (IG).
        Indicator/Warning Light Switch Condition Specified Condition
        Brake warning light Engine switch off → on (IG) Comes on for 3 seconds
        ABS warning light
        Slip indicator light
        VSC OFF indicator light
        PCS OFF warning light
        RCTA OFF indicator light
        Brake hold standby indicator light
        Brake hold operated indicator light
        Tire pressure warning light
        SRS warning light Engine switch off → on (IG) Comes on for 6 seconds
        Pop up hood warning light
        EPS warning light Engine switch off → on (IG)
        • Illuminates when engine switch turned on (IG)
        • Turns off when engine started
        MIL (Malfunction indicator lamp)
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