NAVIGATION SYSTEM (for HDD) HOW TO PROCEED WITH TROUBLESHOOTING

Tech Tips


  • Use the following procedure to troubleshoot the navigation system.

  • *: Use the intelligent tester.


  1. VEHICLE BROUGHT TO WORKSHOP


    NEXT

  2. INSPECT BATTERY VOLTAGE


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

      Standard Voltage
      11 to 14 V

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


      NEXT

  3. DIAGNOSTIC QUESTIONING AND SYMPTOM CONFIRMATION


    1. Ask the customer about symptoms and confirm malfunctions.

      Result
      Result Proceed to
      Other symptoms. A
      The screen displays nothing. B

      B

      Go to step 6
      A

  4. OPERATION CHECK


    1. Refer to Check System Normal Condition Click here.

      Result
      Result Proceed to
      Symptom is not normal operation. A
      Symptom is normal operation. B

      B

      SYMPTOM IS NORMAL OPERATION
      A

  5. CHECK CAN COMMUNICATION SYSTEM*


    1. Check for DTC output Click here.

      Result
      Result Proceed to
      CAN DTC is not output. A
      CAN DTC is output. B

      B

      GO TO CAN COMMUNICATION SYSTEM Click here

      A

  6. CHECK FOR DTC*


    1. Refer to DTC Check/Clear Click here.

      Result
      Result Proceed to
      DTC is output. A
      DTC is not output. B

      B

      Go to step 10
      A

  7. DTC CLEAR*


    1. Refer to DTC Check/Clear Click here.

      Tech Tips

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


      NEXT

  8. RECHECK FOR DTC*


    1. Refer to DTC Check/Clear Click here.

      Result
      Result Proceed to
      DTC is output. A
      DTC is not output. B

      Tech Tips


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

      • Check the DTCs and inspect the area code indicates.


      B

      Go to step 10
      A

  9. DIAGNOSTIC TROUBLE CODE CHART


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


      NEXT

      Go to step 12

  10. 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, perform the symptom reproduction method Click here.


      B

      Go to step 12
      A

  11. CHECK ECU TERMINAL ARRANGEMENT BASED ON MALFUNCTION SYMPTOM


    1. Refer to Terminals of ECU Click here.


      NEXT

  12. CHECK CIRCUIT


    1. Adjust, repair or replace as necessary.


      NEXT

  13. RECHECK FOR DIAGNOSTIC TROUBLE CODE

    Tech Tips

    After clearing the DTCs, recheck for DTCs.


    NEXT

  14. PERFORM CONFIRMATION TEST


    NEXT
    END