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Home >> Lexus >> 2009 >> LS 460L AWD >> Repair and Diagnosis >> Accessories & Equipment >> Interior/Illumination Lights >> Lighting >> Lighting System >> DTC B2482 Clearance Light Circuit Transistor >> Inspection Procedure

Inspection Procedure

  1. RAD VALUE USING TECHSTREAM (CLEARANCE LIGHT) 
    1. Using the Techstream, read the Data List.

      Body No. 5 

      BODY NO. 5 DATA LIST

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Clearance Light Tr Clearance light illumination condition display/OK - Overheat - Overload OK: Normal
      Overheat: ECU overheats
      Overload: ECU overload
      -

      OK: 

      Normal condition listed above is displayed. 

      NG: Go to step 2 

      OK: REPLACE MULTIPLEX NETWORK FRONT LIGHT ECU 

  2. CHECK HARNESS AND CONNECTOR (MULTIPLEX NETWORK FRONT LIGHT ECU - HEADLIGHT) 
    1. Disconnect the B14 ECU connector.
    2. Disconnect the B2 and B12 light connectors.
    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance: 

      for LH 

      RESISTANCE SPECIFIED CONDITIONS

      Tester Connection Condition Specified Condition
      B14-23 (CRAL) - Body ground Always 10 kΩ or higher

      for RH 

      RESISTANCE SPECIFIED CONDITIONS

      Tester Connection Condition Specified Condition
      B14-15 (CRAR) - Body ground Always 10 kΩ or higher
      Fig 1: Identifying B14 Multiplex Networking Front Light ECU Connector Terminals
      G04944673Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      OK: Go to next step 

  3. CHECK CLEARANCE LIGHT BULB (OPERATION) 
    1. Temporarily replace the clearance light bulb with a new or normally functioning one (see DISASSEMBLY  ).
    2. Check for DTC (see DTC CHECK/CLEAR  ).

      OK: 

      DTC B2482 output does not occur. 

      NG: Go to step 4 

      OK: END (REPLACE CLEARANCE LIGHT BULB) (See  DISASSEMBLY   ) 

  4. CHECK HEADLIGHT ASSEMBLY (OPERATION) 
    1. Temporarily replace the headlight with a new or normally functioning one (see REMOVAL  ).
    2. Check for DTC (see DTC CHECK/CLEAR  ).

      OK: 

      DTC B2482 output does not occur. 

      NG: REPLACE MULTIPLEX NETWORK FRONT LIGHT ECU 

      OK: END (REPLACE HEADLIGHT ASSEMBLY) (See  REMOVAL   )