How To Proceed With Troubleshooting

Standard voltage: 11 to 14 V 

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

1. Turn the ignition switch to ACC.
2. Check whether or not the display appears on the radio receiver.

   Result 

   RESULT
   
   

   Result	Proceed to
   Display appears	A
   Display does not appear	B

B: Go to step   5 

A: Go TO NEXT STEP. 

1. Check the audio model.

   Result 

   RESULT
   
   

   Result	Proceed to
   Premium sound models	A
   Standard models	B

B: Go to step   8 

A: Go TO NEXT STEP. 

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 DTC CHECK / CLEAR ).
   • Check and clear past diagnostic trouble codes. Check the diagnostic trouble code and inspect the area the code indicates.

   Result 

   RESULT
   
   

   Result	Proceed to
   DTC does not reoccur	A
   DTC reoccurs	B

B: Go to step   8 

A: Go TO NEXT STEP. 

Result 

B: Go to step   8 

A: Go TO NEXT STEP. 

1. TERMINALS OF ECU 
2. Inspect front No. 1 speaker (see INSPECTION )
3. Inspect front No. 2 speaker (see INSPECTION )
4. Inspect stereo component speaker rear (see INSPECTION )
5. Inspect rear No. 1 speaker (see INSPECTION )
6. Inspect steering pad switch (see INSPECTION )

END