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Home >> Lexus >> 2007 >> RX 400h FWD >> Repair and Diagnosis >> Accessories & Equipment >> Headlights >> Lighting >> Lighting System >> Headlight Beam Level Control Actuator Circuit >> Inspection Procedure

Inspection Procedure

  1. INSPECT HEADLIGHT BEAM LEVEL CONTROL MOTOR LH 
    1. Disconnect the connector from headlight beam level control motor LH.
    2. Measure the resistance according to the value(s) in the table below.
    Fig 1: Inspecting Headlight Beam Level Control Motor LH
    G05273880Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Resistance 

    TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART

    Tester connection Condition Specified condition
    1 (LH2) - 5 (LHB1) Always 26 to 30 Ω
    3 (LH4) - 5 (LHB1) Always 26 to 30 Ω
    4 (LH1) - 5 (LHB1) Always 26 to 30 Ω
    6 (LH3) - 5 (LHB1) Always 26 to 30 Ω

    NG: REPLACE HEADLIGHT BEAM LEVEL CONTROL MOTOR LH 

    OK: Go to next step 

  2. CHECK HARNESS AND CONNECTOR (LEVEL CONTROL MOTOR LH - LEVEL CONTROL ECU) 
    1. Disconnect the H3 connector of headlight beam level control motor LH and the H17 connector of the headlight beam level control ECU.
    2. Measure the resistance according to the value(s) in the table below.
    Fig 2: Disconnecting H3 Connector And H17 Connector Of Headlight Beam Level Control ECU
    G05273881Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Resistance 

    TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART

    Tester connection Condition Specified condition
    H3-1 (LH2) - H17-26 (LH2) Always Below 1 Ω
    H3-3 (LH4) - H17-25 (LH4) Always Below 1 Ω
    H3-4 (LH1) - H17-24 (LH1) Always Below 1 Ω
    H3-5 (LHB1) - H17-22 (LHG) Always Below 1 Ω
    H3-6 (LH3) - H17-23 (LH3) Always Below 1 Ω
    H17-26 (LH2) - Body ground Always 10 kΩ or higher
    H17-2S (LH4) - Body ground Always 10 kΩ or higher
    H17-24 (LH1) - Body ground Always 10 kΩ or higher
    H17-22 (LHG) - Body ground Always 10 kΩ or higher
    H17-23 (LH3) - Body ground Always 10 kΩ or higher

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  3. INSPECT HEADLIGHT BEAM LEVEL CONTROL MOTOR RH 
    1. Disconnect the connector from headlight leveling motor RH.
    2. Measure the resistance according to the value(s) in the table below.
    Fig 3: Inspecting Headlight Beam Level Control Motor RH
    G05273882Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Resistance 

    TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART

    Tester connection Condition Specified condition
    1 (RH2) - 5 (RHB1) Always 26 to 30 Ω
    3 (RH4) - 5 (RHB1) Always 26 to 30 Ω
    4 (RH1) - 5 (RHB1) Always 26 to 30 Ω
    6 (RH3) - 5 (RHB1) Always 26 to 30 Ω

    NG: REPLACE HEADLIGHT BEAM LEVEL CONTROL MOTOR RH 

    OK: Go to next step 

  4. CHECK HARNESS AND CONNECTOR (LEVEL CONTROL MOTOR RH - LEVEL CONTROL ECU) 
    1. Disconnect the H7 connector of headlight beam level control motor RH and the H17 connector of the headlight beam level control ECU.
    2. Measure the resistance according to the value(s) in the table below.
    Fig 4: Disconnecting H7 Connector And H17 Connector Of Headlight Beam Level Control ECU
    G05273883Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Resistance 

    TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART

    Tester connection Condition Specified condition
    H7-1 (RH2) - H17-13(RH2) Always Below 1 Ω
    H7-3 (RH4) - H17-12 (RH4) Always Below 1 Ω
    H7-4 (RH1) - H17-11 (RH1) Always Below 1 Ω
    H7-5 (RHB1) - H17-9 (RHG) Always Below 1 Ω
    H7-6 (RH3) - H17-10 (RH3) Always Below 1 Ω
    H17-13 (RH2) - Body ground Always 10 kΩ or higher
    H17-12 (RH4) - Body ground Always 10 kΩ or higher
    H17-11 (RH1) - Body ground Always 10 kΩ or higher
    H17-9 (RHG) - Body ground Always 10 kΩ or higher
    H17-10 (RH3) - Body ground Always 10 kΩ or higher

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

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

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