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Home › Lexus › 2007 › ES 350 › Repair and Diagnosis › Accessories & Equipment › Headlights › Lighting › Lighting System › DTC B2416 Height Control Sensor Malfunction › Inspection Procedure

Inspection Procedure

  1. READ VALUE OF INTELLIGENT TESTER 
    1. Connect the intelligent tester to the DLC3.
    2. Turn the engine switch on (IG) and turn the intelligent tester main switch on.
    3. Select the items below in the DATA LIST, and read the display on the intelligent tester.

      AFS (AFS ECU): 

      DATA LIST

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      RR HEIGHT SENS SENS Rear height control sensor signal value / 0 to 5 V Approx. 2.5 V -
      HEIGHT SENSE VAL Rear height control sensor power supply value / 0 to 5 V Approx. 5.0 V -

      OK: Normal conditions listed above are displayed. 

    NG: Go to step 2 

    OK: REPLACE AFS ECU 

  2. CHECK HARNESS AND CONNECTOR (AFS ECU - REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY) 
    1. Disconnect the A22 AFS ECU connector.
    2. Disconnect the O1 rear height control sensor sub-assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      A22-18 (SBR) - O1-3 (SHB) Always Below 1 Ω
      A22-19 (SHRL) - O1-2 (SHRR) Always Below 1 Ω
      A22-21 (SGR) - O1-1 (SHG) Always Below 1 Ω
      A22-18 (SBR) - Body ground Always 10 kΩ or higher
      A22-19 (SHRL) - Body ground Always 10 kΩ or higher
      A22-21 (SGR) - Body ground Always 10 kΩ or higher
    Fig 1: Identifying O1 And A22 Connectors Terminals
    G05252310Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step. 

  3. INSPECT AFS ECU 
    1. Reconnect the A22 AFS ECU connector.
    2. Measure the voltage according to the value(s) in the table below.

      Standard voltage 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Condition Condition Specified Condition
      SBR (A22-18) - SGR (A22-21) Engine switch on (IG) 4.5 to 5.5 V
    Fig 2: Identifying A22 AFS ECU Connector Terminals
    G05252311Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE AFS ECU 

    OK: Go to next step. 

  4. INSPECT REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY 
    1. Connect 3 dry cell batteries (1.5 V) in series.
    2. Remove the rear height control sensor sub-assembly.
    3. Connect the positive (+) lead from the battery to terminal 3, and the negative (-) lead from the battery to terminal 1.
    4. Measure the voltage between terminals 2 and 1 while slowly moving the link up and down.

      Standard voltage 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Condition Condition Specified Condition
      2 (SHRR) - 1 (SHG) +45° (High) Approx. 4.05 V
      0° (Normal) Approx. 2.25 V
      -45° (Low) Approx. 0.45 V
    Fig 3: Inspecting Rear Height Control Sensor Sub-Assembly
    G05252312Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY 

    OK: REPLACE AFS ECU 

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