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Home >> Lexus >> 2021 >> RX 450h Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 19 (Automatic Headlight Beam Level Control System (Diagnostics - Introduction)) >> Automatic Headlight Beam Level Control System >> Data List / Active Test [10/2015 - 08/2019] >> Data List / Active Test [10/2015 - 08/2019]

Data List / Active Test [10/2015 - 08/2019]

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  1. DATA LIST 
    NOTE:

    In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.

    HINT: 

    Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic time.

    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Body Electrical / HL AutoLeveling*1 or AFS*2 / Data List.
      1. *1: for Single Beam Headlight without AFS (Adaptive Front-lighting System)
      2. *2: for Triple Beam Headlight, for Single Beam Headlight with AFS (Adaptive Front-lighting System)
    5. Read the Data List according to the display on the Techstream.

      Body Electrical > HL AutoLeveling > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Headlight Low Beam State Low beam headlight state ON or OFF ON: Low beam headlights on
      OFF: Low beam headlights off      		 -
      Headlight High Beam State High beam headlight state ON or OFF ON: High beam headlights on
      OFF: High beam headlights off      		 -
      DRL Operating State Daytime running light state ON or OFF ON: Daytime running lights on
      OFF: Daytime running lights off      		 -
      Clearance Light State Parking light state ON or OFF ON: Parking lights on
      OFF: Parking lights off      		 -
      Right Cornering Light State Cornering light RH state ON or OFF ON: Cornering light RH on
      OFF: Cornering light RH off      		 -
      Left Cornering Light State Cornering light LH state ON or OFF ON: Cornering light LH on
      OFF: Cornering light LH off      		 -
      +B Headlight ECU sub-assembly LH IG power supply voltage value 0 to 19.75 V 11.00 to 14.00 V -
      Height Sens Pw Supply Val Rear height control sensor sub-assembly RH power supply value 0 to 5.00 V 4.61 to 5.00 V -
      Rr Height Sens Signal Val Rear height control sensor sub-assembly RH signal value 0 to 5.00 V 0.50 to 4.50 V Value changes according to vehicle height
      Front Right Wheel Speed Value Front right wheel speed 0.00 to 260.00 km/h (162.00 mph) Vehicle stopped: 0 km/h (0 mph) -
      Front Left Wheel Speed Value Front left wheel speed 0.00 to 260.00 km/h (162.00 mph) Vehicle stopped: 0 km/h (0 mph) -
      Vehicle Speed Vehicle speed 0.00 to 260.00 km/h (162.00 mph) Vehicle stopped: 0 km/h (0 mph) -
      Rear Height Adjust Value Rear height adjustment off set value 0 to 1023 Actual rear height adjustment normal value is displayed (If there is a malfunction, no value is displayed) -
      Rear Height Adjust Valid Flag Rear height adjustment range Valid or Invalid Valid: Rear height control sensor sub-assembly RH value within normal range
      Invalid: Rear height control sensor sub-assembly RH value out of normal range      		 -
      Init Writing Count Number of times initialization performed 0 to 255 Number of times initialization performed -
      Sensor Initialization Hist Sensor initialization history not comp, 10%, 25%, 50%, 75%, 100% or completed Initialization status displayed -
      Steering Sensor Signal Steering sensor value -384 to 382.5 deg 0.0 deg -
      Steering Sensor Center Position Steering sensor center position -3072 to 3070.5 deg 0.0 deg -
      +B Voltage Value Headlight ECU sub-assembly LH +B power supply voltage value 0 to 19.75 V 11.00 to 14.00 V -
      Leveling Motor Target Position Headlight leveling motor target position 0 to 102.3 % 10 to 90 % -
      Number Of Trouble Codes Number of trouble codes 0 to 255 Number of stored DTCs displayed -

      Body Electrical > AFS > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Clearance Light State Parking light state ON or OFF ON: Parking lights on
      OFF: Parking lights off      		 -
      Right Cornering Light State Cornering light RH state ON or OFF ON: Cornering light RH on
      OFF: Cornering light RH off      		 *
      Left Cornering Light State Cornering light LH state ON or OFF ON: Cornering light LH on
      OFF: Cornering light LH off      		 *
      +B Voltage Value Headlight ECU sub-assembly LH +B power supply voltage value 0 to 19.75 V 11.00 to 14.00 V -
      Traveling Direction Traveling direction Not Fwd or Fwd Not Fwd: Shift lever in R or N
      Fwd: Shift lever not in R or N      		 -
      Steering Sensor Initialization Status Steering sensor initialization state Incomplete or Completed Incomplete: Steering sensor zero point calibration incomplete
      Completed: Steering sensor zero point calibration completed      		 -
      Headlight Low Beam State Low beam headlight state ON or OFF ON: Low beam headlights on
      OFF: Low beam headlights off      		 -
      Headlight High Beam State High beam headlight state ON or OFF ON: High beam headlights on
      OFF: High beam headlights off      		 -
      DRL State Daytime running light state ON or OFF ON: Daytime running lights on
      OFF: Daytime running lights off      		 -
      Engine Engine condition Run or Stop Run: Power switch on (READY)
      Stop: Power switch not on (READY)      		 -
      Passing Light Switch Dimmer switch high flash position (pass) signal ON or OFF ON: Dimmer switch in high flash position
      OFF: Dimmer switch not in high flash position      		 -
      Left and Right Leveling Motor Target Value (Integer) Left and right headlight leveling motor target value (Integer) 0 to 31 mm Changes according to the position of the headlight leveling motor -
      Left and Right Leveling Motor Target Value (Fraction) Left and right headlight leveling motor target value (Fraction) 0 to 0.9961 mm Changes according to the position of the headlight leveling motor -
      Left Leveling Motor Current Value (Integer) Current left headlight leveling motor target value (Integer) 0 to 31 mm Changes according to the position of the headlight leveling motor -
      Left Leveling Motor Current Value (Fraction) Current left headlight leveling motor target value (Fraction) 0 to 0.9961 mm Changes according to the position of the headlight leveling motor -
      Right Leveling Motor Current Value (Integer) Current right headlight leveling motor target value (Integer) 0 to 31 mm Changes according to the position of the headlight leveling motor -
      Right Leveling Motor Current Value (Fraction) Current right headlight leveling motor target value (Fraction) 0 to 0.9961 mm Changes according to the position of the headlight leveling motor -
      +B Headlight ECU sub-assembly LH IG power supply voltage value 0 to 19.75 V 11.00 to 14.00 V -
      Height Sens Pw Supply Val Rear height control sensor sub-assembly RH power supply value 0 to 5.00 V 4.61 to 5.00 V -
      Rr Height Sens Signal Val Rear height control sensor sub-assembly RH signal value 0 to 5.00 V 0.50 to 4.50 V -
      Steering Sens Signal Steering sensor signal value -384.0 deg to 382.5 deg 0.0 deg -
      Steering Sens Center Pos Steering sensor center position -3072.0 deg to 3070.5 deg 0.0 deg -
      FR Wheel Speed Front right wheel speed 0.00 to 260.00 km/h (162.00 mph) Vehicle stopped: 0 km/h (0 mph) -
      FL Wheel Speed Front left wheel speed 0.00 to 260.00 km/h (162.00 mph) Vehicle stopped: 0 km/h (0 mph) -
      Vehicle Speed Vehicle speed 0.00 to 260.00 km/h (162.00 mph) Vehicle stopped: 0 km/h (0 mph) -
      Rear Height Adjust Valid Flag Rear height adjustment range Valid or Invalid Valid: Rear height control sensor sub-assembly RH value within normal range
      Invalid: Rear height control sensor sub-assembly RH value out of normal range      		 -
      Init Writing Count Number of times initialization performed 0 to 255 Number of times initialization performed -
      Sensor Initialization Hist Sensor initialization history not comp, 10%, 25%, 50%, 75%, 100% or completed
      • not comp: Headlight ECU sub-assembly LH not initialized after replacing.
      • 10%: Initialization completed when fuel tank was 10% full
      • 25%: Initialization completed when fuel tank was 25% full
      • 50%: Initialization completed when fuel tank was 50% full
      • 75%: Initialization completed when fuel tank was 75% full
      • 100%: Initialization completed when fuel tank was 100% full
      • completed: ECU not replaced and ECU has not been initialized at workshop.
      		 -
      Number Of Trouble Codes Number of trouble codes 0 to 255 Number of stored DTCs displayed -
      1. *: w/ Cornering Light
  2. ACTIVE TEST 

    HINT: 

    Using the Techstream to perform Active Tests allows relays, VSVs, actuators and other items to be operated without removing any parts. This non-intrusive functional inspection can be very useful because intermittent operation may be discovered before parts or wiring is disturbed. Performing Active Tests early in troubleshooting is one way to save diagnostic time. Data List information can be displayed while performing Active Tests.

    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Body Electrical / HL AutoLeveling*1 or AFS*2 / Active Test.
      1. *1: for Single Beam Headlight without AFS (Adaptive Front-lighting System)
      2. *2: for Triple Beam Headlight, for Single Beam Headlight with AFS (Adaptive Front-lighting System)
    5. Perform the Active Test according to the display on the Techstream.

      Body Electrical > HL AutoLeveling > Active Test 

      Tester Display Measurement Item Control Range Diagnostic Note
      Drive The Leveling Motor Headlight leveling motor upward or downward operation Stop/Down/Up Perform the Active Test with the power switch on (READY) and vehicle stopped
      Headlight Leveling Indicator "Headlight System Malfunction Visit Your Dealer" display ON or OFF -

      Body Electrical > AFS > Active Test 

      Tester Display Measurement Item Control Range Diagnostic Note
      Drive The Leveling Motor Headlight leveling motor upward or downward operation Stop/Down/Up Perform the Active Test with the power switch on (READY) and vehicle stopped
      Headlight Leveling Indicator "Headlight System Malfunction Visit Your Dealer" display ON or OFF -
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