How To Proceed With Troubleshooting

HINT:

• Use these procedures to troubleshoot the audio and visual system (w/o multi-display).
• *: 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 FOR DTC (ELECTRIC POWER CONTROL SYSTEM) 
   1. Using the intelligent tester or Techstream, check if the electric power control system is functioning normally.

      Result 

      RESULT CHART
      
      

      Result	Proceed to
      DTC B22B3 is not output	A
      DTC B22B3 is output	B

   B: Go to  ELECTRIC POWER CONTROL SYSTEM 

   A: GO TO NEXT STEP 

4. BASIC INSPECTION 
   1. Turn the engine switch to ACC.
   2. Check whether or not the display appears on the radio receiver.

      Result 

      RESULT CHART
      
      

      Result	Proceed to
      Display appears	A
      Display does not appear	B

   B: Go to step   6 

   A: GO TO NEXT STEP 

5. CHECK AUDIO MODEL 
   1. Check the audio model.

      Result 

      RESULT CHART
      
      

      Result	Proceed to
      Premium sound models	A
      Standard models	B

   B: Go to step   9 

   A: GO TO NEXT STEP 

6. 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.
      • 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   9 

   A: GO TO NEXT STEP 

7. 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   9 

   A: GO TO NEXT STEP 

8. OVERALL ANALYSIS AND TROUBLESHOOTING 
   1. see TERMINALS OF ECU 
   2. Inspect front No. 1 speaker (see INSPECTION  )
   3. Inspect front No. 2 speaker (see INSPECTION  )
   4. Inspect front No. 3 speaker (see INSPECTION  )
   5. Inspect stereo component speaker (see INSPECTION  )
   6. Inspect rear No. 1 speaker (see REMOVAL  )
   7. Inspect steering pad switch (see INSPECTION  )
9. ADJUST, REPAIR OR REPLACE 

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