How To Proceed With Troubleshooting

HINT: 

• Use the following procedure to troubleshoot the navigation system.
• *: Use the Techstream.

1. VEHICLE BROUGHT TO WORKSHOP 

   NEXT: Go to next step 

2. INSPECT BATTERY VOLTAGE 
   1. Measure the battery voltage.

      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: Go to next step 

3. DIAGNOSTIC QUESTIONING AND SYMPTOM CONFIRMATION 
   1. Ask the customer about symptoms and confirm malfunctions.

      Result

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

      B → GO TO STEP   10 , AND PROCEED TO " Black Screen  " 

      A: Go to next step 

4. OPERATION CHECK 
   1. Refer to Check System Normal Condition. Refer to OPERATION CHECK .

      Result

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

      B → SYMPTOM IS NORMAL OPERATION 

      A: Go to next step 

5. CHECK CAN COMMUNICATION SYSTEM* 
   1. Check for DTC output. Refer to HOW TO PROCEED WITH TROUBLESHOOTING .

      Result

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

      B → GO TO CAN COMMUNICATION SYSTEM 

      A: Go to next step 

6. CHECK FOR DTC* 
   1. Refer to DTC CHECK / CLEAR .

      Result

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

      HINT: 

      If the system cannot enter the diagnostic mode, inspect the AVC-LAN and all the components that connect to the AVC-LAN for short circuits and repair or replace the problem part. Refer to AVC-LAN Circuit .

      B → GO TO STEP   10 

      A: Go to next step 

7. DTC CLEAR* 
   1. Clear the DTCs and finish the diagnostic mode.

      HINT: 

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

      NEXT: Go to next step 

8. RECHECK FOR DTC* 

   Result

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

   HINT: 

   • If the system cannot enter the diagnostic mode, inspect the AVC-LAN and all the components that connect to the AVC-LAN for short circuits.
   • Even if the malfunction symptom is not confirmed, check for diagnostic trouble codes. This is because the system stores past diagnostic trouble codes.
   • Refer to the detailed description on the diagnostic screen as necessary. Refer to SYSTEM DESCRIPTION .
   • Check the diagnostic trouble code and inspect the area that the code indicates.

   B → GO TO STEP   10 

   A: Go to next step 

9. DIAGNOSTIC TROUBLE CODE CHART 
   1. Find the output code in Diagnostic Trouble Code Chart. Refer to DIAGNOSTIC TROUBLE CODE CHART .

      NEXT → GO TO STEP   12 

10. PROBLEM SYMPTOMS TABLE 
    1. Refer to PROBLEM SYMPTOMS TABLE .

       Result

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

       HINT: 

       If the symptom does not recur and no DTC is output, perform the symptom reproduction method. Refer to HOW TO PROCEED WITH TROUBLESHOOTING .

       B → GO TO STEP   12 

       A: Go to next step 

11. PERFORM TROUBLESHOOTING BASED ON THE MALFUNCTION SYMPTOM 
    1. Refer to TERMINALS OF ECU .

       NEXT: Go to next step 

12. CHECK THE CIRCUIT 
    1. Adjust, repair or replace as necessary.

       NEXT: Go to next step 

13. RECHECK FOR DIAGNOSTIC TROUBLE CODE 

    HINT: 

    After clearing the DTCs, recheck for DTCs.

    NEXT: Go to next step 

14. PERFORM CONFIRMATION TEST 

    NEXT → END