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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 / Body No 5 / Active Test
    5. Check the operation

      Body No. 5 (Front Controller) 

      ACTIVE TEST - BODY NO. 5 (FRONT CONTROLLER)

      Tester Display Test Part Control Range Diagnostic Note
      Light Head (High) Headlight (Hi-Beam) ON/OFF -

      OK: Hi-Beam headlights illuminate. 

    NG: Go to step 2 

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

  2. INSPECT FUSE (H-LP UPR) 
    1. Remove the H-LP UPR fuse from the No 2 engine room relay block
    2. Measure the resistance of the fuse

      Standard Resistance: 

      Below 1 Ω 

    NG: REPLACE FUSE 

    OK: Go to next Step 

  3. CHECK HARNESS AND CONNECTOR (FRONT CONTROLLER - BATTERY) 
    1. Disconnect the 2E front controller connector
    2. Measure the voltage according to the value (s) in the table below

      Standard Voltage 

      STANDARD VOLTAGE SPECIFICATION

      Tester Connection Condition Specified Condition
      2E-2 - Body ground Always 11 to 14 V
      3. Fig 1: Identifying 2E Front Controller Connector
      G05756430Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next Step 

  4. CHECK HARNESS AND CONNECTOR (FRONT CONTROLLER - BODY GROUND) 
    1. Check the wire harness between the headlight LH and front controller, and the headlight LH and body ground.
      1. Disconnect the 2G front controller connector.
      2. Disconnect the B12 headlight LH connector.
      3. Measure the resistance according to the value (s) in the table below.

        Standard Resistance 

        STANDARD RESISTANCE SPECIFICATION

        Tester Connection Condition Specified Condition
        2G-13 - B12-2 (HI) Always Below 1 Ω
        2G-13 or B12-2 (HI) - Body ground Always 10 kΩ or higher
        B12-1 (E) - Body ground Always Below 1 Ω
        Fig 2: Identifying 2G Front Controller Connector
        G05756431Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Check the wire harness between the headlight RH and front controller, and the headlight RH and body ground.
      1. Disconnect the 2G front controller connector.
      2. Disconnect the B2 headlight RH connector.
      3. Measure the resistance according to the value (s) in the table below.

        Standard Resistance 

        STANDARD RESISTANCE SPECIFICATION

        Tester Connection Condition Specified Condition
        2G-12 - B2-2 (HI) Always Below 1 Ω
        2G-12 or B2-2 (HI) -Body ground Always 10 kΩ or higher
        B2-1 (E) - Body ground Always Below 1 Ω
      3. Fig 3: Identifying 2G Front Controller Connector And B2 Headlight RH Connector
      G05756432Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE FRONT CONTROLLER (MULTIPLEX NETWORK BODY ECU) 

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