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DTC B1296: Front Light ECU Communication Stop: Procedure

WARNING: This page is about a different car, the 2011 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK HARNESS AND CONNECTOR (FRONT CONTROLLER - BATTERY AND BODY GROUND) 
    1. Disconnect the 1F and 1H front controller connectors.
    2. Measure the voltage according to the value(s) in the table below.

      Voltage

      Tester Connection Condition Specified Condition
      1F-1 (+B) - Body ground Always 10 to 14 V
    3. Measure the resistance according to the value(s) in the table below.

      Resistance

      Tester Connection Condition Specified Condition
      1H-2 (GND) - Body ground Always Below 1 Ω

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  2. CHECK RESISTANCE OF COMMUNICATION LINE 
    1. Disconnect the 1G, IR and E30 connectors.
    2. Measure the resistance according to the value(s) in the table below.

      Resistance

      Tester Connection Condition Specified Condition
      1G-7 (MPX) - E30-33 (MPX+) Always Below 1 Ω
      1G-8 (MPX) - IR-9 (MPX1) Below 1 Ω

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → REPLACE FRONT CONTROLLER 

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