How To Proceed With Troubleshooting

WARNING: This page is about a different car, the 2005 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.

Vehicle brought into a workshop
NEXT: Go to next step.
Diagnostic questioning and symptom confirmation (see CUSTOMER PROBLEM ANALYSIS CHECK )
Ask the customer about symptoms and confirm malfunctions. Fill out the Customer Problem Analysis check sheet.
1. The screen displays nothing (go to step 6 , proceed to "BLACK SCREEN (NO IMAGE APPEARS ON NAVIGATION/AUDIO SCREEN) ")
2. Other symptoms (go to step 3)
Confirm the SYSTEM NORMAL CONDITION CHECK
1. Applicable (This is not a malfunction.)
2. Not applicable (go to step 4)
Check the diagnostic trouble codes (see SYSTEM CHECK MODE (DTC CHECK) )
HINT:
- If the system cannot enter the diagnosis mode, inspect each AVC-LAN communication signal and repair or replace problem parts (see AVC-LAN CIRCUIT (RADIO AND NAVIGATION ASSY - STEREO COMPONENT AMPLIFIER ASSY) - 05-2182).
- Even if the malfunction symptom is not confirmed, check the diagnostic trouble codes. This is because the system stores past diagnostic trouble codes.
- Refer to the detailed description on the diagnostic screen, as necessary (see DIAGNOSIS DISPLAY DETAILED DESCRIPTION ).
1. A code is output (go to step 5)
2. A code is not output (go to step 6 )
DIAGNOSTIC TROUBLE CODE CHART
Find the output code in the diagnostic trouble code chart.
1. NEXT: Go to step 8
PROBLEM SYMPTOMS TABLE
Find the applicable symptom code in the problem symptoms table.

HINT:

If the symptom does not recur and no code is output, perform the symptom reproduction method (see HOW TO PROCEED WITH TROUBLESHOOTING ).
1. There is an applicable symptom code in the table. (go to step 8 )
2. There is no applicable symptom code in the table. (go to step 7)
Check the ECU terminal arrangement based on the malfunction symptom (see TERMINALS OF ECU )
NEXT: Go to next step.
Check the circuit
Adjust, repair or replace as necessary.

NEXT: Go to next step.
Recheck the diagnostic trouble code (see SYSTEM CHECK MODE (DTC CLEAR/RECHECK) )
HINT:

After deleting the DTC, recheck the diagnostic trouble code.

NEXT: Go to next step.
Perform confirmation test
NEXT: Go to next step.

END