Initial Inspection and Diagnostic Overview

NAVIGATION: NAVIGATION SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING

HOW TO PROCEED WITH TROUBLESHOOTING

1. VEHICLE BROUGHT INTO A WORKSHOP
NEXT -- Continue to next step.
2. DIAGNOSTIC QUESTIONING AND SYMPTOM CONFIRMATION
(a) Ask the customer about symptoms and confirm malfunctions.
-- THE SCREEN DISPLAYS NOTHING (GO TO STEP 8, AND PROCEED TO "BLACK SCREEN")
-- OTHER SYMPTOMS (GO TO STEP 3)
3. CONFIRM THE SYSTEM NORMAL CONDITION
-- APPLICABLE (THIS IS NOT A MALFUNCTION)
-- NOT APPLICABLE (GO TO STEP 4)
4. CHECK DTC
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.

-- A CODE IS OUTPUT (GO TO STEP 5)
-- A CODE IS NOT OUTPUT (GO TO STEP 8)
5. DTC CLEAR
(a) Clear the DTCs and finish the diagnostic mode.
HINT: The currently output DTCs may not indicate actual malfunctions depending on the vehicle conditions.

NEXT -- Continue to next step.
6. RECHECK DTC
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.
- Even if the malfunction symptom is not confirmed, check for diagnostic trouble codes. This is because the system stores past diagnostic trouble codes.
- Refer to the detailed description on the diagnostic screen as necessary Diagnosis Display Detailed Description.
- Check the diagnostic trouble code and inspect the area the code indicates.

-- A CODE IS OUTPUT (GO TO STEP 7)
-- A CODE IS NOT OUTPUT (GO TO STEP 8)
7. DIAGNOSTIC TROUBLE CODE CHART
(a) Find the output code in the diagnostic trouble code chart Navigation System.
NEXT -- GO TO STEP 10
8. PROBLEM SYMPTOMS TABLE
(a) Find the applicable symptom in the problem symptoms table Problem Symptoms Table.
HINT: If the symptom does not recur and no code is output, perform the symptom reproduction method Electronic Circuit Inspection Procedure.

-- THERE IS AN APPLICABLE SYMPTOM IN THE TABLE (GO TO STEP 10)
-- THERE IS NO APPLICABLE SYMPTOM IN THE TABLE (GO TO STEP 9)
9. CHECK THE ECU TERMINAL ARRANGEMENT BASED ON THE MALFUNCTION SYMPTOM
NEXT -- Continue to next step.
10. CHECK THE CIRCUIT
(a) Adjust, repair, or replace as necessary.
NEXT -- Continue to next step.
11. RECHECK THE DIAGNOSTIC TROUBLE CODE
HINT: After deleting the DTCs, recheck for diagnostic trouble codes.

NEXT -- Continue to next step.
12. PERFORM CONFIRMATION TEST
NEXT -- END