Initial Inspection and Diagnostic Overview

NAVIGATION: NAVIGATION SYSTEM:

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 9, AND PROCEED TO "No Image Appears on Multi-display")
-- OTHER SYMPTOMS (GO TO STEP 3)
3. CHECK CAN COMMUNICATION SYSTEM
(a) Use Techstream to check for normal function of the CAN communication system.
-- A CODE IS OUTPUT (PROCEED TO "CAN COMMUNICATION SYSTEM")
-- A CODE IS NOT OUTPUT (GO TO STEP 4)
4. CONFIRM THE SYSTEM NORMAL CONDITION
-- APPLICABLE (THIS IS NOT A MALFUNCTION)
-- NOT APPLICABLE (GO TO STEP 5)
5. CHECK FOR DTC
HINT: If the system cannot enter the diagnostic mode, inspect each AVC-LAN communication component and repair or replace problem parts.

-- A CODE IS OUTPUT (GO TO STEP 6)
-- A CODE IS NOT OUTPUT (GO TO STEP 9)
6. CLEAR DTC
(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.
7. RECHECK FOR DTC
HINT:
- If the system cannot enter the diagnosis 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 8)
-- A CODE IS NOT OUTPUT (GO TO STEP 9)
8. DIAGNOSTIC TROUBLE CODE CHART
(a) Find the output code on the diagnostic trouble code chart.
NEXT -- GO TO STEP 11
9. PROBLEM SYMPTOMS TABLE
(a) Find the applicable symptom code 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 CODE IN THE TABLE (GO TO STEP 11)
-- THERE IS NO APPLICABLE SYMPTOM CODE IN THE TABLE (GO TO STEP 10)
10. CHECK THE ECU TERMINAL ARRANGEMENT BASED ON THE MALFUNCTION SYMPTOM
NEXT -- Continue to next step.
11. CHECK THE CIRCUIT
(a) Adjust, repair, or replace as necessary.
NEXT -- Continue to next step.
12. RECHECK FOR DIAGNOSTIC TROUBLE CODE
HINT: After deleting the DTCs, recheck for diagnostic trouble codes.

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