BLIND SPOT MONITOR SYSTEM HOW TO PROCEED WITH TROUBLESHOOTING

Tech Tips


  • Use the following procedure to troubleshoot the blind spot monitor system.

  • *: Use the Techstream.


  1. VEHICLE BROUGHT TO WORKSHOP


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  2. CUSTOMER PROBLEM ANALYSIS


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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, replace or recharge the auxiliary battery before proceeding to the next step.


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  4. CHECK 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
      A
  5. CHECK FOR DTC AND FREEZE FRAME DATA*


    1. Refer to DTC Check / Clear for the blind spot monitor system Click here.

    2. Record or print DTCs and freeze frame data, if necessary Click here.

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

      B
      A
  6. CLEAR DTC*


    1. Refer to DTC Check / Clear for the blind spot monitor system Click here.

      Tech Tips

      The current DTCs may not indicate actual malfunctions depending on the vehicle operating conditions.


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  7. RECHECK FOR DTC*


    1. Refer to DTC Check / Clear for the blind spot monitor system Click here.

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

      Tech Tips

      Even if the malfunction symptom is not confirmed, check for DTCs. This is because the system stores history DTCs.


      B
      A
  8. DIAGNOSTIC TROUBLE CODE CHART


    1. Find the output DTC in Diagnostic Trouble Code Chart Click here.


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  9. 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

      Tech Tips

      If the symptom does not recur and no DTC is output, attempt to reproduce the symptoms Click here.


      B
      A
  10. PERFORM TROUBLESHOOTING BASED ON MALFUNCTION SYMPTOM*


    1. Refer to Terminals of ECU Click here.

    2. Refer to Data List / Active Test Click here.


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  11. CIRCUIT INSPECTION


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  12. ADJUST, REPAIR OR REPLACE


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  13. PERFORM BEAM AXIS INSPECTION AND CONFIRMATION


    1. Enter Test Mode (refer to Blind Spot Monitor Beam Axis Inspection) Click here.

    2. Confirm the blind spot monitor beam axis display and perform the blind spot monitor beam axis adjustment Click here.


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  14. PERFORM CONFIRMATION TEST*


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