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Home >> Lexus >> 2004 >> RX 330 AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 437 (Lighting System - Diagnostics) >> DTC B2416: Height Control Sensor Malfunction >> Inspection Procedure

Inspection Procedure

WARNING: This page is about a different car, the 2005 Lexus RX 330. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK VEHICLE CONDITION 
    1. Check the vehicle condition.

      Result: 

      VEHICLE CONDITION REFERENCE

      A w/o Air Suspension System
      B w/ Air Suspension System
    1. B: Go to step  6 . 
    2. A: Go to next step. 
  2. CHECK HARNESS AND CONNECTOR (HEIGHT CONTROL SENSOR SUB-ASSY 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 Front Height Sensor H13 Connector Terminals
      G03007423Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard: 

      TESTER SPECIFIED CONDITION CHART

      Tester connection Condition Specified condition
      SHB (H26-3) - SHG (H26-1) Ignition switch ON 4.5 to 5.5 V
    1. NG: Go to step  5 . 
    2. OK: Go to next step. 
  3. INSPECT HEIGHT CONTROL SENSOR SUB-ASSY 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.

      Standard: 

      LINK ANGLE VOLTAGE SPEECHIFICATION

      Link Angle Standard voltage
      +45° (High) 4.5 V
      0° (Normal) 2.5 V
      -45 ° (Low) 0.5 V
      Fig 2: Identifying Front Height Sensor H22 Connector Terminals
      G03007424Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPLACE HEIGHT CONTROL SENSOR SUB-ASSY REAR RH (SEE  HEIGHT CONTROL SENSOR SUB-ASSY REAR RH  ) 
    2. OK: Go to next step. 
  4. CHECK HARNESS AND CONNECTOR (AFS ECU - HEIGHT CONTROL SENSOR SUB-ASSY REAR RH) 
    1. Disconnect the A14 connector from the AFS ECU.
    2. Disconnect the H26 connector from the height control sensor sub-assy rear RH.
    3. Measure the resistance according to the value (s) in the following table.
      Fig 3: Identifying Front Height Sensor H13 Connector Terminals
      G03007425Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard: 

      TESTER SPECIFIED CONDITION CHART

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

      Result: 

      PROBLEM SYMPTOMS

      A OK (When checking from the DTC)
      B OK (When checking from the PROBLEM SYMPTOMS TABLE)
      C NG
    1. B: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN  PROBLEM SYMPTOMS TABLE  
    2. C: REPAIR OR REPLACE HARNESS OR CONNECTOR 
    3. A: REPLACE AFS ECU (SEE  HEADLAMP SWIVEL ECU ASSY  ) 
  5. INSPECT AFS ECU 
    1. Measure the voltage according to the value (s) in the table below.
      Fig 4: Disconnecting A39 Connector From AFS ECU
      G03007426Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard: 

      TESTER SPECIFIED CONDITION CHART

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

      Result: 

      DTC

      A OK
      B NG (When checking from the DTC)
      C NG (When checking from the PROBLEM SYMPTOMS TABLE)
    1. B: REPLACE AFS ECU (SEE  HEADLAMP SWIVEL ECU ASSY  ) 
    2. C: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN  PROBLEM SYMPTOMS TABLE  
    3. 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 PRE-CHECK ).

      OK: Normal system code is output. 

    1. NG: GO TO FLOW CHART (SEE  DIAGNOSTIC TROUBLE CODE CHART  ) 
    2. 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: Measuring Voltage Between Terminals 2 And 4
      G03007427Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard: 

      TESTER SPECIFIED CONDITION CHART

      Tester connection Condition Specified condition
      SBL3 (S15-19) - SGL3 (S15-20) Ignition switch ON 4.5 to 5.5 V
    1. NG: Go to step  10 . 
    2. 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: Measuring Voltage Between Terminals 2 And 3
      G03007428Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard: 

      TESTER SPECIFIED CONDITION CHART

      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
    1. NG: REPLACE SUSPENSION CONTROL ECU (SEE  SUSPENSION CONTROL ECU  ) 
    2. 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: Identifying AFS ECU Connector Terminals
      G03007429Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard: 

      TESTER SPECIFIED CONDITION CHART

      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: 

      PROBLEM SYMPTOMS

      A OK (When checking from the DTC)
      B OK (When checking from the PROBLEM SYMPTOMS TABLE)
      C NG
    1. B: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN  PROBLEM SYMPTOMS TABLE  
    2. C: REPAIR OR REPLACE HARNESS OR CONNECTOR 
    3. A: REPLACE AFS ECU (SEE  HEADLAMP SWIVEL ECU ASSY  ) 
  10. INSPECT AFS ECU 
    1. Measure the voltage according to the value (s) in the table below.
      Fig 8: Identifying AFS ECU Connector Terminals
      G03007430Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard: 

      TESTER SPECIFIED CONDITION CHART

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

      Result: 

      DTC

      A OK
      B NG (When checking from the DTC)
      C NG (When checking from the PROBLEM SYMPTOMS TABLE)
    1. B: REPLACE AFS ECU (SEE  HEADLAMP SWIVEL ECU ASSY  ) 
    2. C: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN  PROBLEM SYMPTOMS TABLE  
    3. A: REPAIR OR REPLACE HARNESS OR CONNECTOR (AFS ECU - SUSPENSION CONTROL ECU) 
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