How To Proceed With Troubleshooting

HINT: 

• Use the following procedure to troubleshoot the audio and visual system.
• *: Use the Techstream.

1. VEHICLE BROUGHT TO WORKSHOP 

   NEXT: Go to next step 

2. 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

   NEXT: Go to next step 

3. INSPECT AUXILIARY BATTERY VOLTAGE 
   1. Measure the auxiliary battery voltage with power switch off.

      Standard Voltage

      11 to 14 V

      HINT: 

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

      NEXT: Go to next step 

4. 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.

      HINT: 

      • 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 lower, or 65°C (149°F) or higher.

      NG → SET CABIN TO APPROPRIATE TEMPERATURE 

      OK: Go to next step 

5. CHECK CAN COMMUNICATION SYSTEM* 
   1. Check for DTC output. Refer to DIAGNOSIS SYSTEM .

      Result

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

      B → GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING 

      A: Go to next step 

6. CHECK FOR DTC* 
   1. Refer to DTC Check/Clear. Refer to DTC CHECK / CLEAR .

      Result

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

      B → Go to   10 

      A: Go to next step 

7. DTC CLEAR* 
   1. Refer to DTC Check/Clear. Refer to DTC CHECK / CLEAR .

      HINT: 

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

      NEXT: Go to next step 

8. RECHECK FOR DTC* 
   1. Refer to DTC Check/Clear. Refer to DTC CHECK / CLEAR .

      Result

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

      HINT: 

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

      B → Go to   10 

      A: Go to next step 

9. DIAGNOSTIC TROUBLE CODE CHART 
   1. Find the output code in Diagnostic Trouble Code Chart. Refer to DIAGNOSTIC TROUBLE CODE CHART .

      NEXT → Go to   12 

10. PROBLEM SYMPTOMS TABLE 
    1. 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

       HINT: 

       If the symptom does not recur and no DTCs are output, attempt to reproduce the symptoms. Refer to HOW TO PROCEED WITH TROUBLESHOOTING .

       B → Go to   12 

       A: Go to next step 

11. PERFORM TROUBLESHOOTING BASED ON MALFUNCTION SYMPTOM 
    1. Refer to Terminals of ECU. Refer to TERMINALS OF ECU .

       NEXT: Go to next step 

12. CHECK CIRCUIT 
    1. Adjust, repair or replace as necessary.

       NEXT: Go to next step 

13. RECHECK FOR DTC* 
    1. After clearing DTCs, recheck for DTCs.

       NEXT: Go to next step 

14. PERFORM CONFIRMATION TEST 

    NEXT → END