NAVIGATION SYSTEM (for Navigation Receiver Type) > HOW TO PROCEED WITH TROUBLESHOOTING

for Preparation Click here

HINT:

1. Use the following procedure to troubleshoot the navigation system (for Navigation Receiver Type).
   
2. *: Use the intelligent tester.
   

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1. 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.
   
2. Gather as much information as possible for reference. Past problems that seem unrelated may also help in some cases.
   
3. 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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1. Measure the auxiliary battery voltage with the 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.

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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:

   1. A humid cabin and a rapid change in temperature may lead to condensation. Condensation in the cabin may cause a short circuit.
      
   2. The navigation 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

1. Refer to Check System Normal Condition (Click here).
   

   Result:

   Result	Proceed to
   Symptom is not normal operation.	A
   Symptom is normal operation.	B

B.	SYMPTOM IS NORMAL OPERATION
A

1. Check for DTC output (Click here).
   

   Result:

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

B.	GO TO CAN COMMUNICATION SYSTEM (Click here)
A

1. Refer to DTC Check/Clear (Click here).
   

   Result:

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

   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 problem part (Click here).

B.	Go to step 11
A

1. Refer to DTC Check/Clear (Click here).
   

   HINT:

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

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1. Refer to DTC Check/Clear (Click here).
   

   Result:

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

   HINT:

   1. Even if the malfunction symptom is not confirmed, check for DTCs. This is because the system stores history DTCs.
      
   2. If more information is needed, perform a recheck using the "System Check Mode" screen after rechecking for DTCs using the intelligent tester.
      
   3. Check the DTCs and inspect the area that the code indicates.
      

B.	Go to step 11
A

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

NEXT.

Go to step 14

1. Enter the "HDD Check" screen. Refer to Check Hard Disk Drive in Operation Check (Click here).
   

   OK:

   "OK" is displayed.
   

NG.	REPLACE HARD DISK DRIVE (Click here)
OK

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

   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 (Click here).

B.	Go to step 14
A

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

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1. Adjust, repair or replace as necessary.
   

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1. After clearing DTCs, recheck for DTCs (Click here).
   

NEXT

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