How To Proceed With Troubleshooting

1. VEHICLE BROUGHT TO WORKSHOP 
2. INSPECT BATTERY VOLTAGE 

   Standard voltage: 

   11 to 14 V 

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

3. BASIC INSPECTION 
   1. Turn the engine switch on (IG).
   2. Check whether or not the radio receiver turns on.

      Result 

      RESULT CHART
      
      

      Result	Proceed to
      Radio receiver turns on	A
      Radio receiver does not turn on	B

   B: Go to step  6

   A: Go to Next Step 

4. CHECK FOR DTC 
   1. Check for DTCs and note any codes that are output.
   2. Delete the DTCs.
   3. Recheck by simulating the operation indicated by the DTC.

      HINT:

      • If the system cannot enter the diagnosis mode, inspect the AVC-LAN and all the components that connect to the AVC-LAN for short circuits and repair or replace the problem part.
      • Even if the malfunction symptom is not confirmed, check the DTCs. This is because the system stores past DTCs.
      • Check and clear past DTCs. Then check for DTCs.

        Result 

        RESULT CHART
        
        

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

   B: Go to step  6

   A: Go to Next Step 

5. DIAGNOSTIC TROUBLE CODE CHART 

   Find the output code on the diagnostic trouble code chart (See DIAGNOSTIC TROUBLE CODE CHART  ).

   NEXT: Go to step  8

6. PROBLEM SYMPTOMS TABLE 

   Refer to the 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. (See TERMINALS OF ECU  ).
8. ADJUST, REPAIR OR REPLACE 
9. CONFIRMATION TEST 

NEXT: END