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Home >> Lexus >> 2007 >> RX 400h FWD >> Repair and Diagnosis >> Accessories & Equipment >> Headlights >> Lighting >> Lighting System >> DTC B2416 Height Control Sensor Malfunction >> Inspection Procedure

Inspection Procedure

  1. CHECK HARNESS AND CONNECTOR (HEIGHT CONTROL SENSOR SUB-ASSEMBLY REAR RH POWER SOURCE) 
    1. Disconnect the H26 connector from the height control sensor rear RH.
    2. Measure the voltage according to the value(s) in the table below.
    Fig 1: Identifying Height Control Sensor Rear RH H26 Connector Terminals
    G05273762Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Voltage 

    TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART

    Tester connection Condition Specified condition
    SHB (H26-3) - SHG (H26-1) Ignition switch ON 4.5 to 5.5 V

    NG: GO TO step   4 

    OK: Go to next step 

  2. INSPECT HEIGHT CONTROL SENSOR SUB-ASSEMBLY REAR RH 
    1. Connect 3 dry cell batteries (1.5 V) in a series.
    2. Connect the positive (+) lead from the battery to terminal 1 and the negative (-) lead from the battery to terminal 3.
    3. Measure the voltage between terminal 2 and terminal 3 when slowly moving the link up and down.
    Fig 2: Inspecting Height Control Sensor Sub-Assembly Rear RH
    G05273763Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Voltage 

    VOLTAGE REFERENCE CHART

    Link Angle Standard voltage
    +45° (High) 4.5 V
    0° (Normal) 2.5 V
    -45° (Low) 0.5 V

    NG: REPLACE HEIGHT CONTROL SENSOR SUB-ASSEMBLY REAR RH 

    OK: Go to next step 

  3. CHECK HARNESS AND CONNECTOR (AFS ECU - HEIGHT CONTROL SENSOR REAR RH) 
    1. Disconnect the A14 connector from the AFS ECU.
    2. Disconnect the H26 connector from the height control sensor sub-assembly rear RH.
    3. Measure the resistance according to the value(s) in the following table.
    Fig 3: Identifying H26 And AFS ECU Connector Terminals
    G05273764Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Resistance 

    TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART

    Tester connection Condition Specified condition
    SHRL (A14-9) - SHRR (H26-2) Always Below 1 Ω
    SHRL (A14-9) - Body ground Always 10 kΩ or higher

    Result 

    RESULT CHART

    Condition Proceed to
    OK (When checking from the DTC) A
    OK (When checking from the PROBLEM SYMPTOMS TABLE) B
    NG C

    B: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

    C: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    A: REPLACE AFS ECU 

  4. INSPECT AFS ECU 
    1. Measure the voltage according to the value(s) in the table below.
    Fig 4: Inspecting AFS ECU
    G05280018Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Voltage 

    TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART

    Tester connection Condition Specified condition
    SBR (A14-10) - SGR (A14-20) Ignition switch ON 4.5 to 5.5 V

    Result 

    RESULT CHART

    Condition Proceed to
    OK A
    NG (When checking from the DTC) B
    NG (When checking from the PROBLEM SYMPTOMS TABLE) C

    B: REPLACE AFS ECU 

    C: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

    A: REPAIR OR REPLACE HARNESS OR CONNECTOR (AFS ECU - HEIGHT CONTROL SENSOR REAR RH) 

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