How To Proceed With Troubleshooting

HINT:

• Use these procedures to troubleshoot the navigation system.
• *: Use the intelligent tester.

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. BASIC INSPECTION 
   1. Turn the ignition switch ACC.
   2. Check whether or not the display appears on the multi-display.

   Result 

   RESULT TABLE
   
   

   Result	Proceed to
   Display appears	A
   Display does not appear	B

   B:  Go to step  6

   A: Go to Next Step 

4. INSPECT COMMUNICATION FUNCTION OF MULTIPLEX COMMUNICATION SYSTEM (BEAN)* 
   1. Use the intelligent tester to check if the Multiplex Communication System (MPX) is functioning normally.

   Result 

   RESULT TABLE
   
   

   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 

5. CHECK FOR DTC 
   1. Check for DTCs and note any codes that are output.
   2. Delete for DTC.
   3. Recheck for DTCs. Based on the DTC output in the first step, try to force output of the audio 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 TABLE
   
   

   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 

   Result 

   RESULT TABLE
   
   

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

   B: Go to step   7 

   A: Go to Next Step 

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

   NEXT: END