AUDIO AND VISUAL SYSTEM (for Radio and Display Type) HOW TO PROCEED WITH TROUBLESHOOTING

VEHICLE BROUGHT TO WORKSHOP

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CUSTOMER PROBLEM ANALYSIS

• When troubleshooting, confirm that the problem symptoms have been accurately identified. Preconceptions should be discarded in order to make an accurate judgment. To clearly understand what the problem symptoms are, it is extremely important to ask the customer about the problem and the conditions at the time the malfunction occurred.

• Gather as much information as possible for reference. Past problems that seem unrelated may also help in some cases.

• The following 5 items are important points in problem analysis:

  What	Vehicle model, system name
  When	Date, time, occurrence frequency
  Where	Road conditions
  Under what conditions?	Driving conditions, weather conditions
  How did it happen?	Problem symptoms

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INSPECT BATTERY VOLTAGE

1. Measure the battery voltage.

   Standard voltage
   11 to 14 V

   
   

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

   
   
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CHECK CABIN

1. Check that condensation is not likely to occur in the cabin, and that the temperature is not high or extremely low in the cabin.

   OK
   Condensation is not likely being produced and the temperature is not high or extremely low.

   Tip:
   

   • A humid cabin and a rapid change in temperature may lead to condensation. Condensation in the cabin may cause a short circuit.

   • The audio and visual system may not operate normally when the temperature is -20°C (-4°F) or less, or 65°C (149°F) or higher.

   
   
   • NG
   • SET CABIN TO APPROPRIATE TEMPERATURE
   • OK

CHECK CAN COMMUNICATION SYSTEM*

1. Check for DTC output (Click here)

   Table 1. Result

   Result	Proceed to
   CAN DTCs are not output	A
   CAN DTCs are output	B

   
   
   • B
   • GO TO CAN COMMUNICATION SYSTEM (See pageClick here)
   • A

CHECK FOR DTC*

1. Check for DTCs (Click here).

   Table 2. Result

   Result	Proceed to
   DTCs are output	A
   DTCs are not output	B

   
   
   • B
   • Go to step 10
   • A

CLEAR DTC*

1. Clear the DTC (Click here).

   Tip:

   The present DTCs may not indicate actual malfunctions depending on the vehicle operating conditions.

   
   
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CHECK FOR DTC*

1. Check for DTCs (Click here).

   Table 3. Result

   Result	Proceed to
   DTCs are output	A
   DTCs are not output	B

   Tip:
   

   • Even if the malfunction symptom is not confirmed, check for DTCs. This is because the system stores history DTCs.

   • If more information is needed, perform a recheck using the "System Check Mode" screen after rechecking for DTCs using the intelligent tester.

   • Check the DTCs and inspect the area that the code indicates.

   
   
   • B
   • Go to step 10
   • A

DIAGNOSTIC TROUBLE CODE CHART

1. Find the output code in Diagnostic Trouble Code Chart (Click here).

   
   
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   • Go to step 12

PROBLEM SYMPTOMS TABLE

1. Refer to Problem Symptoms Table (Click here).

   Table 4. Result

   Result	Proceed to
   Fault is not listed in Problem Symptoms Table	A
   Fault is listed in Problem Symptoms Table	B

   Tip:

   If the symptom does not recur and no DTCs are output, attempt to reproduce the symptoms (Click here).

   
   
   • B
   • ADJUST, REPAIR OR REPLACE IN ACCORDANCE WITH PROBLEM SYMPTOMS TABLE
   • A

PERFORM TROUBLESHOOTING BASED ON MALFUNCTION SYMPTOM

1. Refer to Terminals of ECU (Click here).

   
   
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CHECK CIRCUIT

1. Adjust, repair or replace as necessary.

   
   
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RECHECK FOR DTC*

1. After clearing DTCs, recheck for DTCs.

   
   
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PERFORM CONFIRMATION TEST

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• END