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Home >> Lexus >> 2008 >> IS 250 RWD, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 2 (Lighting (Exterior)) >> Lighting System >> DTC B2412: Headlight Swivel Motor LH Malfunction; DTC B2413 Headlight Swivel Motor RH Malfunction >> Inspection Procedure

Inspection Procedure

WARNING: This page is about a different car, the 2008 Lexus IS F. However, it is still accessible from the selected car via links, so may be relevant.
  1. PERFORM ACTIVE TEST USING TECHSTREAM 
    1. Connect the Techstream to the DLC3
    2. Turn the engine switch on (IG).
    3. Turn the Techstream on
    4. Enter the following menus. Body Electrical / AFS / Active Test
    5. Check the operation

      AFS (AFS ECU) 

      ACTIVE TEST - AFS (AFS ECU)

      Tester Display Test Part Control Range Diagnostic Note
      Drive The Swivel Motor RH Swivel motor RH right direction rotation RIGHT/OFF -
      Drive The Swivel Motor LH Swivel motor LH left direction rotation LEFT/OFF -

      OK: Swivel motor operates. 

      Result 

      RESULT REFERENCE

      Result Proceed to
      OK (When checking from Problem Symptoms Table) A
      OK (When checking from Diagnostic Trouble Code Chart) B
      NG C

    B: REPLACE AFS ECU  (See AFS ECU  )

    C: Go to step 2 

    A: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE  (See PROBLEM SYMPTOMS TABLE  )

  2. INSPECT HEADLIGHT ASSEMBLY 
    Fig 1: Identifying Headlight Assembly Connector Terminal B12 And B2
    G05756395Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the B12 and B2 headlight connectors
    2. Measure the resistance according to the value (s) in the table below.

      Standard Resistance: 

      LH Side (B2412) 

      STANDARD RESISTANCE SPECIFICATION

      Tester Connection Condition Specified Condition
      B12-23 (BL1-) - B12-24 (BL1+) Always 6 to 8 Ω
      B12-21 (BL2-) - B12-22 (BL2+) Always 6 to 8 Ω

      RH Side (B2413) 

      STANDARD RESISTANCE SPECIFICATION

      Tester Connection Condition Specified Condition
      B2-23 (BR1-) - B2-24 (BR1+) Always 6 to 8 Ω
      B2-21 (BR2-) - B2-22 (BR2+) Always 6 to 8 Ω

      HINT:

      Measure the resistance after the headlight has cooled

    NG: REPLACE HEADLIGHT ASSEMBLY  (See HEADLIGHT ASSEMBLY  )

    OK: Go to next Step 

  3. CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY - AFS ECU) 
    Fig 2: Identifying Headlight Assembly Connector Terminal B12 And B2 (AFS ECU)
    G05756396Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the A28 AFS ECU connector.
    2. Disconnect the B12 and B2 headlight connectors.
    3. Measure the resistance according to the value (s) in the table below

      Standard Resistance: 

      LH Side (B2412) 

      STANDARD RESISTANCE SPECIFICATION

      Tester Connection Condition Specified Condition
      A28-25 (BL1+) - B12-24 (BL1+) Always Below 1 Ω
      A28-26 (BL1-) - B12-23 (BL1-) Always Below 1 Ω
      A28-27 (BL2+) - B12-22 (BL2+) Always Below 1 Ω
      A28-28 (BL2-) - B12-21 (BL2-) Always Below 1 Ω
      A28-19 (SMGL) - B12-19 (SMGL) Always Below 1 Ω
      A28-24 (SML) - B12-18 (SML) Always Below 1 Ω
      A28-22 (SMBL) - B12-20 (SMBL) Always Below 1 Ω
      A28-25 (BL1+) - Body ground Always 10 kΩ or higher
      A28-26 (BL1-) - Body ground Always 10 kΩ or higher
      A28-27 (BL2+) - Body ground Always 10 kΩ or higher
      A28-28 (BL2-) - Body ground Always 10 kΩ or higher
      A28-19 (SMGL) - Body ground Always 10 kΩ or higher
      A28-24 (SML) - Body ground Always 10 kΩ or higher
      A28-22 (SMBL) - Body ground Always 10 kΩ or higher

      RH Side (B2413) 

      STANDARD RESISTANCE SPECIFICATION

      Tester Connection Condition Specified Condition
      A28-9 (BR1+) - B2-24 (BR1+) Always Below 1 Ω
      A28-10 (BR1-) - B2-23 (BR1-) Always Below 1 Ω
      A28-11 (BR2+) - B2-22 (BR2+) Always Below 1 Ω
      A28-12 (BR2-) - B2-21 (BR2-) Always Below 1 Ω
      A28-18 (SMGR) - B2-19 (SMGR) Always Below 1 Ω
      A28-21 (SMBR) - B2-20 (SMBR) Always Below 1 Ω
      A28-23 (SMR) - B2-18 (SMR) Always Below 1 Ω
      A28-9 (BR1+) - Body ground Always 10 kΩ or higher
      A28-10 (BR1-) - Body ground Always 10 kΩ or higher
      A28-11 (BR2+) - Body ground Always 10 kΩ or higher
      A28-12 (BR2-) - Body ground Always 10 kΩ or higher
      A28-18 (SMGR) - Body ground Always 10 kΩ or higher
      A28-21 (SMBR) - Body ground Always 10 kΩ or higher
      A28-23 (SMR) - Body ground Always 10 kΩ or higher

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next Step 

  4. CHECK AFS ECU 
    Fig 3: Identifying AFS ECU Headlight Assembly Connector Terminal B12 And B2
    G05756397Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the B12 and B2 headlight connectors
    2. Measure the voltage according to the value (s) in the table below.

      Standard Voltage: 

      LH Side (B2412) 

      STANDARD VOLTAGE SPECIFICATION

      Tester Connection Condition Specified Condition
      B12-20 (SMBL) - B12-19 (SMGL) Engine switch off Below 1 V
      Engine switch on (IG) 4.5 to 5.5 V

      RH Side (B2413) 

      STANDARD VOLTAGE SPECIFICATION

      Tester Connection Condition Specified Condition
      B2-20 (SMBR) - B2-19 (SMGR) Engine switch off Below 1 V
      Engine switch on (IG) 4.5 to 5.5 V

    NG: REPLACE AFS ECU  (See AFS ECU  )

    OK: Go to next Step 

  5. REPLACE HEADLIGHT ASSEMBLY 

    HEADLIGHT ASSEMBLY 

    1. Temporarily replace the headlight assembly with a new or known good one
    2. Check that the headlight assembly operates.

      OK: Returns to normal operation. 

    NG: REPLACE AFS ECU  (See AFS ECU  )

    OK: END 

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