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How To Proceed With Troubleshooting

  1. VEHICLE BROUGHT INTO A WORKSHOP 
    1. NEXT: Go to next step. 
  2. DIAGNOSTIC QUESTIONING AND SYMPTOM CONFIRMATION (SEE  CUSTOMER PROBLEM ANALYSIS CHECK   ) 

    Ask the customer about symptoms and confirm malfunctions. Fill out the Customer Problem Analysis check sheet.

    1. THE SCREEN DISPLAYS NOTHING (GO TO STEP   6 , PROCEED TO " BLACK SCREEN (NO IMAGE APPEARS ON NAVIGATION/AUDIO SCREEN  )") 
    2. OTHER SYMPTOMS (GO TO STEP 3) 
  3. CONFIRM THE SYSTEM NORMAL CONDITION (SEE  SYSTEM NORMAL CONDITION CHECK   ) 
    1. APPLICABLE (THIS IS NOT A MALFUNCTION.) 
    2. NOT APPLICABLE (GO TO STEP 4) 
  4. CHECK THE DIAGNOSTIC TROUBLE CODES (SEE  SYSTEM CHECK MODE (DTC CHECK)   ) 

    HINT:

    • If the system cannot enter the diagnosis mode, inspect each AVC-LAN communication signal and repair or replace problem parts (see AVC-LAN CIRCUIT (NAVIGATION ECU - MULTI-DISPLAY)  to AVC-LAN CIRCUIT (MULTI-DISPLAY - CLOCK ASSY) ).
    • Even if the malfunction symptom is not confirmed, check for diagnostic trouble codes. This is because the system stores past diagnostic trouble codes.
    • Check and clear past diagnostic trouble codes. Check for diagnostic trouble codes and inspect the areas indicated by the codes.
    1. A CODE IS OUTPUT (GO TO STEP 5) 
    2. A CODE IS NOT OUTPUT (GO TO STEP   6 ) 
  5. DIAGNOSTIC TROUBLE CODE CHART (SEE  DIAGNOSTIC TROUBLE CODE CHART   ) 

    Find the output code in the diagnostic trouble code chart.

    1. NEXT: GO TO STEP   8 
  6. PROBLEM SYMPTOMS TABLE (SEE  PROBLEM SYMPTOMS TABLE   ) 

    Find the applicable symptom code in the problem symptoms table.

    HINT:

    If the symptom does not recur and no code is output, perform the symptom reproduction method (see HOW TO PROCEED WITH TROUBLESHOOTING ).

    1. THERE IS AN APPLICABLE SYMPTOM CODE IN THE TABLE (GO TO STEP   8 ) 
    2. THERE IS NO APPLICABLE SYMPTOM CODE IN THE TABLE (GO TO STEP 7) 
  7. CHECK THE ECU TERMINAL ARRANGEMENT BASED ON THE MALFUNCTION SYMPTOM (SEE  TERMINALS OF ECU   ) 
    1. NEXT: Go to next step. 
  8. CHECK THE CIRCUIT 

    Adjust, repair or replace as necessary.

    1. NEXT: Go to next step. 
  9. RECHECK THE DIAGNOSTIC TROUBLE CODE 

    HINT:

    After deleting the DTCs, recheck for diagnostic trouble codes.

    1. NEXT: Go to next step. 
  10. PERFORM CONFIRMATION TEST 
    1. NEXT: END 
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