How To Proceed With Troubleshooting

HINT:

• Use these procedures to troubleshoot the navigation system.
• The intelligent tester should be used in step 3.

1. VEHICLE BROUGHT TO WORKSHOP 

   NEXT 

2. INSPECT BATTERY VOLTAGE 

   Standard voltage: 

   11 to 14 V 

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

   NEXT 

3. INSPECT COMMUNICATION FUNCTION OF LARGE-SCALE MULTIPLEX COMMUNICATION SYSTEM (BEAN) 
   1. Using the intelligent tester to check if the Multiplex Communication System (MPX) is functioning normally.

      Result 

      PROBLEM SYMPTOM CHART
      
      

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

   B : Go to MULTIPLEX COMMUNICATION SYSTEM 

   A : GO TO NEXT STEP 

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

      Result 

      PROBLEM SYMPTOM CHART
      
      

      Result	Proceed to
      Display turns on	A
      Display does not turn on	B

   B : Go to step   6 

   A : GO TO NEXT STEP 

5. CHECK FOR DTC 
   1. Check for DTCs and note any codes that are output.
   2. Delete the DTC.
   3. Recheck 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 the DTCs. This is because the system stores past DTCs.
      • Refer to the detailed description on the diagnostic screen as necessary.
      • Check and clear past DTCs. Then check for DTCs.

        Result 

        PROBLEM SYMPTOM CHART
        
        

        Result	Proceed to
        DTC does not reoccur	A
        DTC reoccurs	B

   B : Go to step   7 

   A : GO TO NEXT STEP 

6. PROBLEM SYMPTOMS TABLE 

   Refer to PROBLEM SYMPTOMS TABLE  .

   Result 

   PROBLEM SYMPTOM 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 

   NEXT 

8. ADJUST, REPAIR OR REPLACE 

   NEXT 

9. CONFIRMATION TEST 

   NEXT : END