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Home >> Lexus >> 2017 >> RC 350 Base, AWD >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Meter / Gauge System - Diagnostic Codes & Symptom Tests (1 Of 2) >> Meter / Gauge System >> On-Vehicle Inspection [11/2017 - 09/2020] >> Procedure

On-Vehicle Inspection [11/2017 - 09/2020]: Procedure

  1. INSPECT COMBINATION METER ASSEMBLY 
    1. Check speedometer operation
      NOTE:
      • The combination meter assembly receives the vehicle speed signal from the brake actuator assembly (skid control ECU) via CAN communication. Therefore, perform the following inspection referring to values on the Data List of the brake actuator assembly (skid control ECU) because it is the source of the vehicle speed signal.
      • Data List values of the brake actuator assembly (skid control ECU) are used for this inspection. Therefore, make sure to perform this inspection after confirming that DTCs are not output.
      • If the tire size or tire inflation pressure is not within the specified range, or the tires are excessively worn, the speedometer indication error will increase. Therefore, make sure to perform this inspection after checking that the tire size, tire inflation pressure and tire wear are in the specified range.
      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 / ABS/VSC/TRAC / Data List.
      6. Read the Data List according to the display on the Techstream.

        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.: 326.4 km/h (203 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
        • for Optitron meter type
          REFERENCE MPH

          Techstream Indication (mph) Acceptable Range (mph)
          20 19.2 to 21.7
          40 39.4 to 42.2
          60 59.8 to 62.6
          80 80 to 83.2
          100 100.3 to 103.5
          120 120.7 to 123.9
          140 141.1 to 144.3
          REFERENCE KM/H

          Techstream Indication (km/h) Acceptable Range (km/h)
          20 18.4 to 22.4
          40 38.6 to 43.1
          60 59.0 to 63.5
          80 79.1 to 84.1
          100 99.4 to 104.4
          120 119.8 to 124.8
          140 140.2 to 145.2
          160 160.6 to 165.6
          180 181.0 to 186.1
          200 201.4 to 206.5
          220 221.8 to 227.0
          240 242.2 to 247.4

          OK

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

        • for TFT meter type
          REFERENCE MPH

          Techstream Indication (mph) Acceptable Range (mph)
          20 19 to 22
          40 39 to 42
          60 60 to 63
          80 80 to 83
          100 100 to 104
          120 121 to 124
          140 141 to 144
          REFERENCE KM/H

          Techstream Indication (km/h) Acceptable Range (km/h)
          20 18 to 22
          40 39 to 43
          60 59 to 64
          80 79 to 84
          100 99 to 104
          120 120 to 125
          140 140 to 145
          160 161 to 166
          180 181 to 186
          200 201 to 206
          220 222 to 227
          240 242 to 247

          OK

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

    2. Inspect 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. Enter the following menus: 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 for 2GR-FKS:
        600 to 700 rpm: Idling (shift lever in N, engine warmed up and A/C off)
        for 8AR-FTS:
        750 to 850 rpm: Idling (shift lever in N, engine warmed up and A/C off)        		 When the crankshaft position sensor is malfunctioning, "Engine Speed" is approximately 0 rpm or varies greatly from the actual engine speed.

        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)

        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).

        OK

        Warning or Indicator Light Specified Condition
        Brake warning light Warning or indicator light comes on for about 3 seconds after turning the engine switch on (IG).
        VSC OFF indicator light
        Slip indicator light
        ABS warning light
        Tire pressure warning light
        PCS warning light
        Eco driving indicator light
        Master warning light
        SRS warning light Warning light comes on for about 6 seconds after turning the engine switch on (IG).
        Charge warning light* Warning light comes on when the engine switch is on (IG).
        MIL (Check engine warning light)
        EPS warning light
        1. *: for TFT meter type
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