How To Proceed With Troubleshooting

HINT:

• Use these procedures to troubleshoot the navigation system (for HDD).
• *: Use the intelligent tester or Techstream.

1. VEHICLE BROUGHT TO WORKSHOP 
2. INSPECT BATTERY VOLTAGE 

   Standard voltage: 

   11 to 14 V 

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

3. CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM* 
   1. Use the intelligent tester or Techstream to check if the CAN communication system is functioning normally.

      Result 

      RESULT CHART
      
      

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

   B: Go to CAN COMMUNICATION SYSTEM  (See HOW TO PROCEED WITH TROUBLESHOOTING )

   A: Go to next step 

4. BASIC INSPECTION 
   1. Turn the power switch ON (ACC)
   2. Check whether or not the display appears on the multi-display.

      Result 

      RESULT CHART
      
      

      Result	Proceed to
      Display appears	A
      Display does not appear	B

   B:  Go to step  7

   A: Go to next step 

5. CHECK FOR DTC 
   1. Check for DTCs and note any codes that are output.
   2. Clear for DTC
   3. Recheck for DTCs Based on the DTC output in the first step, try to force output of the navigation system DTC by simulating the operation indicated by the DTC

      HINT:

      • If the system cannot enter the diagnosis mode, inspect each AVC-LAN communication signal and repair or replace problem parts
      • Even if the malfunction symptom is not confirmed, check for DTCs. This is because the system stores past DTCs.
      • Refer to the detailed description on the diagnostic screen, as necessary (see DIAGNOSIS DISPLAY DETAILED DESCRIPTION  )
      • Check and clear past diagnostic trouble codes Check the diagnostic trouble code and inspect the area the code indicates.

      Result 

      RESULT CHART
      
      

      Result	Proceed to
      DTC does not reoccur	A
      DTC reoccurs	B

   B:  Go to step  8

   A: Go to next step 

6. PROBLEM SYMPTOMS TABLE 

   Result 

   RESULT CHART
   
   

   Result	Proceed to
   Fault is not listed in problem symptoms table	A
   Fault is listed in problem symptoms table	B

   B:  Go to step  8

   A: Go to next step 

7. OVERALL ANALYSIS AND TROUBLESHOOTING 
   1. Terminals of ECU (see TERMINALS OF ECU  )
   2. Inspect the front No 1 speaker (see INSPECTION )
   3. Inspect the steering pad switch (see INSPECTION )
8. ADJUST, REPAIR OR REPLACE 

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