How To Proceed With Troubleshooting

HINT:

• Use these procedures to troubleshoot the audio and visual 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. INSPECT COMMUNICATION FUNCTION OF MULTIPLEX COMMUNICATION SYSTEM (BEAN)* 
   1. Using the intelligent tester, check if the Multiplex Communication System (MPX) is functioning normally.

      Result 

      RESULT
      
      

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

   B: Go to  MULTIPLEX COMMUNICATION 

   A: Go to next step 

4. BASIC INSPECTION 
   1. Turn the power switch ON (ACC).
   2. Check whether or not the radio receiver turns on.

      Result 

      RESULT
      
      

      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 

5. CHECK FOR DTC 
   1. Check for DTCs and note any codes that are output (see DTC CHECK / CLEAR  ).
   2. Delete the DTCs.
   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 the problem parts.
      • 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
      
      

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

   B: Go to step  7

   A: Go to next step 

6. DIAGNOSTIC TROUBLE CODE CHART 
   1. Find the output code on the DIAGNOSTIC TROUBLE CODE CHART  .

   NEXT: Go to step  9

7. PROBLEM SYMPTOMS TABLE 
   1. Refer to the PROBLEM SYMPTOMS TABLE  .

      Result 

      RESULT
      
      

      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. TERMINALS OF ECU  .
9. REPAIR OR REPLACE 
10. CONFIRMATION TEST 

    NEXT: END