How To Proceed With Troubleshooting
WARNING: This page is about a different car, the 2005 Lexus RX 330. 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.
- THE SCREEN DISPLAYS NOTHING (GO TO STEP 6 , PROCEED TO "BLACK SCREEN (NO IMAGE APPEARS ON NAVIGATION/AUDIO SCREEN)")
- OTHER SYMPTOMS (GO TO STEP 3)
- CONFIRM THE SYSTEM NORMAL CONDITION (SEE SYSTEM NORMAL CONDITION CHECK
)
- APPLICABLE (THIS IS NOT A MALFUNCTION.)
- 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 (NAVIGATION ECU - TELEVISION CAMERA ECU) - AVC-LAN CIRCUIT (MULTI-DISPLAY - TELEVISION CAMERA ECU) ).
- 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 ).
- Check and clear the past diagnostic trouble code. Check the diagnostic trouble code and inspect the area the code indicates.
- A: CODE IS OUTPUT (GO TO STEP 5)
- A: CODE IS NOT OUTPUT (GO TO STEP 6 .)
- DIAGNOSTIC TROUBLE CODE CHART (SEE DIAGNOSTIC TROUBLE CODE CHART
)
Find the output code on the diagnostic trouble code chart.
- NEXT OUTPUT THE DIAGNOSTIC TROUBLE CODE (GO TO STEP 8 .)
- (SEE 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 ).
- THERE IS AN APPLICABLE SYMPTOM CODE IN THE TABLE (GO TO STEP 8 )
- 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: END