LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Toyota >> 2017 >> Prius Two >> Repair and Diagnosis >> External Pages >> Different car >> Section 5 (Automatic Headlight Beam Level Control System - Diagnostics - Introduction) >> Automatic Headlight Beam Level Control System >> Data List / Active Test [12/2018 - ] >> Data List / Active Test [12/2018 - ]
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Data List / Active Test [12/2018 - ]

WARNING: This page is about a different car, the 2022 Toyota Prius, 2021 Toyota Prius, 2020 Toyota Prius, and 2019 Toyota Prius. However, it is still accessible from the selected car via links, so may be relevant.
  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 / AFS / Data List.
    5. Read the Data List according to the display on the Techstream.

      Body Electrical > AFS > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Clearance Light State Parking light state OFF or ON OFF: Parking lights off
      ON: Parking lights on      		 -
      Right Cornering Light/Front Side Illuminate Light State Cornering light RH/front side illuminate light RH state OFF or ON OFF: Cornering light RH/front side illuminate light RH off
      ON: Cornering light RH/front side illuminate light RH on      		 Although this item is displayed on the Techstream, it is not applicable to this vehicle.
      Left Cornering Light/Front Side Illuminate Light State Cornering light LH/front side illuminate light LH state OFF or ON OFF: Cornering light LH/front side illuminate light LH off
      ON: Cornering light LH/front side illuminate light LH on      		 Although this item is displayed on the Techstream, it is not applicable to this vehicle.
      +B Voltage Value No. 1 headlight ECU sub-assembly LH +B power supply voltage value 0.00 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 OFF or ON OFF: Low beam headlights off
      ON: Low beam headlights on      		 -
      Headlight High Beam State High beam headlight state OFF or ON OFF: High beam headlights off
      ON: High beam headlights on      		 -
      DRL State Daytime running light state OFF or ON OFF: Daytime running lights off
      ON: Daytime running lights on      		 -
      Engine Ready signal Stop or Run Stop: Power switch not on (READY)
      Run: Power switch on (READY)      		 -
      +B No. 1 headlight ECU sub-assembly LH IG power supply voltage value 0.00 to 19.75 V 11.00 to 14.00 V -
      Height Sens Pw Supply Val Rear height control sensor sub-assembly LH power supply value 0.00 to 6.25 V 4.61 to 5.00 V -
      Rr Height Sens Signal Val Rear height control sensor sub-assembly LH signal value 0.00 to 5.00 V 0.50 to 4.50 V Value changes according to vehicle height
      Steering Sens Signal Steering sensor signal value -384.0 to 382.5 deg Changes according to the operation of the steering wheel -
      Steering Sens Center Pos Steering sensor center position -3072.0 to 3070.5 deg 0.0 deg -
      FR Wheel Speed Front right wheel speed 0.00 to 327.67 km/h (203.60 mph) Vehicle stopped: 0 km/h (0 mph) -
      FL Wheel Speed Front left wheel speed 0.00 to 327.67 km/h (203.60 mph) Vehicle stopped: 0 km/h (0 mph) -
      Vehicle Speed Vehicle speed 0.00 to 327.67 km/h (203.60 mph) Vehicle stopped: 0 km/h (0 mph) -
      Rear Height Adjust Valid Flag Rear height adjustment range Invalid or Valid Inval: Rear height control sensor sub-assembly LH value out of normal range
      Valid: Rear height control sensor sub-assembly LH value within 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 complied not comp: No. 1 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
      complied: ECU not replaced and ECU has not been initialized at workshop      		 -
      LR Leveling Target Step Headlight swivel and leveling motor LH and RH (leveling function) target step value 0 to 500 step 23 to 180 step -
      L Leveling Current Step Headlight swivel and leveling motor LH (leveling function) current step value 0 to 500 step 23 to 180 step -
      R Leveling Current Step Headlight swivel and leveling motor RH (leveling function) current step value 0 to 500 step 23 to 180 step -
      Number Of Trouble Codes Number of trouble codes 0 to 255 Number of stored DTCs displayed -
  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 / AFS / Active Test.
    5. Perform the Active Test according to the display on the Techstream.

      Body Electrical > AFS > Active Test 

      Tester Display Measurement Item Control Range Diagnostic Note
      Drive The Leveling Motor headlight swivel and leveling motor (leveling function) upward or downward operation Stop, Down or Up Perform the Active Test with the power switch on (READY) and vehicle stopped
      Headlight Indicator "Headlight System Malfunction Visit Your Dealer" display OFF or ON -
scientia non olet · About LEMON Manuals