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

Inspection Procedure

  1. CHECK VEHICLE CONDITION 
    1. Check the vehicle condition.
      VEHICLE CONDITION CHART

      Condition Proceed to
      w/o Air Suspension System A
      w/ Air Suspension System B

    B: Go to step  6

    A: Go to Next step 

  2. 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 H26 Height Control Sensor Rear RH Connector Terminals
      G05273762Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Voltage 

      TESTER CONNECTION SPECIFIED CONDITION

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

    NG: Go to step  5

    OK: Go to Next step 

  3. 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.

      Voltage 

      VOLTAGE REFERENCE CHART

      Link Angle Standard voltage
      +45°(High) 4.5 V
      0°(Normal) 2.5 V
      -45°(Low) 0.5 V
      Fig 2: Inspecting Height Control Sensor Sub-Assembly Rear RH
      G05273763Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE HEIGHT CONTROL SENSOR SUB-ASSEMBLY REAR RH 

    OK: Go to Next step 

  4. CHECK HARNESS AND CONNECTOR (AFS ECU - HEIGHT CONTROL SENSOR SUB-ASSEMBLY 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 Connector Terminals
      G05273764Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      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 REFERENCE 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 

  5. INSPECT AFS ECU 
    1. Measure the voltage according to the value(s) in the table below.
      Fig 4: Inspecting A14 AFS ECU Connector Terminals
      G05273765Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Voltage 

      TESTER CONNECTION SPECIFIED CONDITION

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

      Result 

      RESULT REFERENCE 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) 

  6. CHECK DTC (AIR SUSPENSION SYSTEM) 
    1. Check the DTC of the air suspension system (See AIR SUSPENSION SYSTEM ).

      OK: Normal system code is output. 

    NG:  GO TO appropriate FLOW CHART or PROBLEM SYMPTOMS TABLE .

    OK: Go to Next step 

  7. CHECK HARNESS AND CONNECTOR (SUSPENSION CONTROL ECU HEIGHT SIGNAL POWER SOURCE) 
    1. Measure the voltage according to the value(s) in the table below.
      Fig 5: Identifying S15 Suspension Control ECU Connector Terminals
      G05273766Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Voltage 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester connection Condition Specified condition
      SBL3 (S15-19) - SGL3 (S15-20) Ignition switch ON 4.5 to 5.5 V

    NG: Go to step  10

    OK: Go to Next step 

  8. INSPECT SUSPENSION CONTROL ECU 
    1. Measure the voltage according to the value(s) in the table below.
      Fig 6: Identifying S16 Suspension Control ECU Connector Terminals
      G05273767Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Voltage 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester connection Condition Specified condition
      SHR2 (S16-24) - Body ground Ignition switch ON 0.5 to 4.5 V
      SHF2 (S16-26) - Body ground Ignition switch ON 0.5 to 4.5 V

    NG: REPLACE SUSPENSION CONTROL ECU 

    OK: Go to Next step 

  9. CHECK HARNESS AND CONNECTOR (SUSPENSION CONTROL ECU - AFS ECU) 
    1. Disconnect the suspension control ECU connector and AFS ECU connector.
    2. Measure the resistance according to the value(s) in the table below.
      Fig 7: Disconnecting A14 And A15 AFS ECU Connector Terminals
      G05273768Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester connection Condition Specified condition
      SHRL (A14-9) - SHR2 (S16-24) Always Below 1 Ω
      SGR (A14-20) - SGL3 (S15-20) Always Below 1 Ω
      SBR (A14-10) - SBL3 (S15-19) Always Below 1 Ω
      SHFL (A15-2) - SHF2 (S16-26) Always Below 1 Ω
      SHRL (A14-9) - Body ground Always 10 kΩ or higher
      SGR (A14-20) - Body ground Always 10 kΩ or higher
      SBR (A14-10) - Body ground Always 10 kΩ or higher
      SHFL (A15-2) - Body ground Always 10 kΩ or higher

      Result 

      RESULT REFERENCE 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 

  10. INSPECT AFS ECU 
    1. Measure the voltage according to the value(s) in the table below.
      Fig 8: Identifying A14 AFS ECU Connector Terminals
      G05273765Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Voltage 

      TESTER CONNECTION SPECIFIED CONDITION

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

      Result 

      RESULT REFERENCE 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 - SUSPENSION CONTROL ECU) 

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