LEXUS LS430 2003 Factory Repair Manual

repair or replace problem parts (see AVC-LAN CIRCUIT (NAVIGATION ECU -STEREO
COMPONENT TUNER) - AVC-LAN CIRCUIT (NAVIGATION ECU - 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)
5.(see DIAGNOSTIC TROUBLE CODE CHART
)
Find the output code on the diagnostic trouble code chart.
Output the diagnostic trouble code (go to step 8)
6.(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)
7.Check the ECU terminal arrangement based on the malfunction symptom (see TERMINALS OF
ECU )
8.Check the circuit
Adjust, repair or replace as necessary.
9.Recheck the DIAGNOSTIC TROUBLE CODE CHART

HINT:
After deleting the DTC, recheck the diagnostic trouble code.
10.Perform confirmation test

END
Fig. 11: Customer Problem Analysis Check Sheet
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

HINT:
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560053004f0044005c001100030003[
Illustrations may differ from the actual vehicle depending on the device settings and options. Therefore,
some detailed areas may not be shown exactly the same as on the actual vehicle.
1.Enter diagnostic mode (see DIAGNOSTIC START
-UP/FINISH ).
Fig. 12: Display Diagnostic Menu

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
2.Select "Display Check" from the "Diagnosis MENU" screen.

Fig. 13: Display Checking Menu
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
3.Select "Color Bar Check" from the "Display Check" screen.

Fig. 14: Identifying Color Bar Screen
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

4.Select a color bar from the "Color Bar Check Mode" screen.
HINT:
The entire screen turns to the color or stripe selected.
Touching the display will return to the "Color Bar Check" screen.
HINT:
This mode checks the touch switch operation condition on the multi-display.
Illustrations may differ from the actual vehicle depending on the device settings and options. Therefore,
some detailed areas may not be shown exactly the same as on the actual vehicle.
1.Enter diagnostic mode (see DIAGNOSTIC START
-UP/FINISH ).
Fig. 15: Displaying Diagnosis Menu

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
2.Select "Display Check" from the "Diagnosis MENU" screen.

Fig. 16: Displaying Checking Menu
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
3.Select "Touch Switch Check" from the "Display Check" screen.

Fig. 17: Displaying Touch Switch Check
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
4.Touch the display anywhere in the open area to perform the check when the "Touch Switch
Check" screen is displayed.
HINT:
A "+" mark is displayed where the display is touched.
The "+" mark remains on the display even after the finger is removed.
HINT:
This mode checks the panel switch operation response on the multi-display.
Illustrations may differ from the actual vehicle depending on the device settings and options. Therefore,
some detailed areas may not be shown exactly the same as on the actual vehicle.
1.Enter diagnostic mode (see DIAGNOSTIC START
-UP/FINISH ).

Fig. 18: Displaying Menu Chart
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
2.Select "Display Check" from the "Diagnosis Menu" screen.

Fig. 19: Displaying Check Menu
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
3.Select "Panel Switch Check" from the "Display Check" screen.