AUTOMATIC HIGH BEAM SYSTEM HOW TO PROCEED WITH TROUBLESHOOTING

Tech Tips


  • Use the following procedure to troubleshoot the automatic high beam system.

  • *: Use the Techstream.


  1. VEHICLE BROUGHT TO WORKSHOP


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  2. CUSTOMER PROBLEM ANALYSIS CHECK AND SYMPTOM CHECK


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  3. INSPECT AUXILIARY BATTERY VOLTAGE


    1. Measure the auxiliary battery voltage with the power switch off.

      Standard Voltage
      11 to 14 V

      If the voltage is below 11 V, recharge or replace the auxiliary battery before proceeding to the next step.


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  4. INSPECT CAN COMMUNICATION SYSTEM*


    1. Use the Techstream to check if the CAN communication system is functioning normally Click here.

      Result
      Result Proceed to
      CAN communication system DTCs are not output A
      CAN communication system DTCs are output B

      B

      GO TO CAN COMMUNICATION SYSTEM Click here

      A

  5. CHECK FOR DTC*


    1. Check for DTCs Click here.

      Result
      Result Proceed to
      DTCs are not output A
      DTCs are output B

      B

      GO TO DIAGNOSIS TROUBLE CODE CHART Click here

      A

  6. PROBLEM SYMPTOMS TABLE


    1. Refer to Problem Symptoms Table Click here.

      Result
      Result Proceed to
      Fault is not listed in Problem Symptoms Table A
      Fault is listed in Problem Symptoms Table B

      B

      GO TO PROBLEM SYMPTOMS TABLE Click here

      A

  7. OVERALL ANALYSIS AND TROUBLESHOOTING*


    1. Data List / Active Test Click here

    2. Terminals of ECU Click here


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  8. ADJUST, REPAIR OR REPLACE


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  9. CONFIRMATION TEST


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    END