Initial Inspection and Diagnostic Overview

NAVIGATION: NAVIGATION SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING

1. VEHICLE BROUGHT TO 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

(a) Refer to the "SYSTEM NORMAL CONDITION CHECK" System Normal Condition Check.

-- APPLICABLE (THIS IS NOT A MALFUNCTION)

-- NOT APPLICABLE (GO TO STEP 4)

4. CHECK FOR DTC

(a) Refer to the "DTC CHECK/CLEAR" Reading and Clearing Diagnostic Trouble Codes.

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 FOR 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 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 .

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

(a) Refer to the "TERMINALS OF ECU" Pinout Values and Diagnostic Parameters.

NEXT -- Continue to next step.

10. CHECK THE CIRCUIT

(a) Adjust, repair, or replace as necessary.

NEXT -- Continue to next step.

11. RECHECK FOR DIAGNOSTIC TROUBLE CODE

HINT
After deleting the DTCs, recheck for diagnostic trouble codes.

NEXT -- Continue to next step.

12. PERFORM CONFIRMATION TEST

NEXT -- END