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Home >> Lexus >> 2011 >> IS 350C >> Repair and Diagnosis >> External Pages >> Different car >> Section 97 (Audio / Visual System (Diagnostics - Introduction)) >> Audio And Visual System >> How To Proceed With Troubleshooting (To 12/2010) >> How To Proceed With Troubleshooting
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How To Proceed With Troubleshooting

WARNING: This page is about a different car, the 2011 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.

HINT: 

Use the following procedure to troubleshoot the audio and visual system.

  1. VEHICLE BROUGHT TO WORKSHOP 

    NEXT: Go to next step 

  2. INSPECT BATTERY VOLTAGE 
    1. Measure the battery voltage with the ignition switch off.

      Standard Voltage

      11 to 14 V

      • If the voltage is below 11 V, recharge or replace the battery before proceeding to the next step.

      NEXT: Go to next step 

  3. BASIC INSPECTION 
    1. Turn the ignition switch to ON.
    2. Check whether or not the radio receiver assembly turns on.

      Result

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

      B → Go to step 6   6 

      A: Go to next step 

  4. CHECK FOR DTC 

    HINT: 

    Refer to DTC Check/Clear. Refer to DTC CHECK / CLEAR .

    1. Check for DTCs and note any codes that are output.
    2. Clear the DTCs.
    3. Recheck for DTCs by simulating the operation indicated by the DTCs.

      HINT: 

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

        Result

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

      B → Go to step 6   6 

      A: Go to next step 

  5. DIAGNOSTIC TROUBLE CODE CHART 

    HINT: 

    Refer to Diagnostic Trouble Code Chart. Refer to DIAGNOSTIC TROUBLE CODE CHART .

    NEXT → Go to step 8   8 

  6. PROBLEM SYMPTOMS TABLE 

    HINT: 

    Refer to Problem Symptoms Table. Refer to PROBLEM SYMPTOMS TABLE .

    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 8   8 

    A: Go to next step 

  7. PERFORM TROUBLESHOOTING BASED ON MALFUNCTION SYMPTOM 

    HINT: 

    Refer to Terminals of ECU. Refer to TERMINALS OF ECU .

    NEXT: Go to next step 

  8. ADJUST, REPAIR OR REPLACE 

    NEXT: Go to next step 

  9. CONFIRMATION TEST 

    NEXT → END 

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