How to Proceed With Troubleshooting

NAVIGATION: NAVIGATION SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING

HINT
Use the following procedure to troubleshoot the navigation system.

1. VEHICLE BROUGHT TO WORKSHOP

NEXT -- Continue to next step.

2. INSPECT BATTERY VOLTAGE

(a) 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 -- Continue to next step.

3. DIAGNOSTIC QUESTIONING AND SYMPTOM CONFIRMATION

(a) Ask the customer about symptoms and confirm malfunctions.

Result:





B -- Go to step 9, AND PROCEED TO "BLACK SCREEN"
A -- Continue to next step.

4. OPERATION CHECK

(a) Refer to Check System Normal Condition Operation Check.

Result:





B -- SYMPTOM IS NORMAL OPERATION
A -- Continue to next step.

5. CHECK FOR DTC

(a) Refer to DTC Check/Clear Reading and Clearing Diagnostic Trouble Codes.

Result:





HINT
If the system cannot enter the 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 AVC-LAN Circuit.

B -- Go to step 9
A -- Continue to next step.

6. DTC CLEAR

(a) Refer to DTC Check/Clear Reading and Clearing Diagnostic Trouble Codes.

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

NEXT -- Continue to next step.

7. RECHECK FOR DTC

(a) Refer to DTC Check/Clear Reading and Clearing Diagnostic Trouble Codes.

Result:





HINT
* Even if the malfunction symptom is not confirmed, check for DTCs. This is because the system stores history DTCs.
* Refer to the detailed description on the diagnostic screen as necessary System Description.
* Check the DTCs and inspect the area that the code indicates.

B -- Go to step 9
A -- Continue to next step.

8. DIAGNOSTIC TROUBLE CODE CHART

(a) Find the output code in Diagnostic Trouble Code Chart Navigation System.

NEXT -- Go to step 11

9. PROBLEM SYMPTOMS TABLE

(a) Refer to Problem Symptoms Table Problem Symptoms Table.

Result:





HINT
If the symptom does not recur and no DTC is output, attempt to reproduce the systems How To Proceed With Troubleshooting.

B -- Go to step 11
A -- Continue to next step.

10. PERFORM TROUBLESHOOTING BASED ON THE MALFUNCTION SYMPTOM

(a) Refer to Terminals of ECU Pinout Values and Diagnostic Parameters.

NEXT -- Continue to next step.

11. CHECK CIRCUIT

(a) Adjust, repair or replace as necessary.

NEXT -- Continue to next step.

12. RECHECK FOR DIAGNOSTIC TROUBLE CODE

HINT
After clearing the DTCs, recheck for DTCs.

NEXT -- Continue to next step.

13. PERFORM CONFIRMATION TEST

NEXT -- END