LEXUS LS430 2003 Factory Repair Manual

Fig. 39: Checking CD
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HINT:
If dirt is on the CD surface, wipe it with a soft cloth from inside to outside in a radial direction.
NG: CLEAN THE CD
OK: Go to next step
2.CHECK THE CD
a. Check that the CD is not deformed or cracked.
OK: No deformations or cracks appear on the CD.

NG: REPLACE THE CD
Fig. 40: Checking CD

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OK: Go to next step
3.CHECK USING ANOTHER CD
a. Check using another CD.
1. Check if the problem recurs using another CD.
OK: The problem does not recur.
NG: REPLACE THE CD
OK: Go to next step
4.CHECK RADIO RECEIVER ASSY
a. Check the radio receiver assy installation condition.
1. Check that the radio receiver ass
y is properly installed (see REPLACEMENT).

OK: Radio receiver assy is properly installed.
NG: REINSTALL THE RADIO RECEIVER ASSY PROPERLY
OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS
TABLE
INSPECTION PROCEDURE
1.CHECK AUDIO SETTINGS
a. Set "BASS", "MID" and "TREB" to the initial value and check if sound is normal.
OK: Return to normal.
OK: END
NG: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS
TABLE
INSPECTION PROCEDURE
1.CHECK FOR ANY FOREIGN OBJECT
a. Check for any foreign objects.
1. Check that no foreign objects or defects are detected in the cassette tape player of the radio
receiver assembly.
OK: No foreign objects or defects are detected.
NG: REMOVE FOREIGN OBJECT
OK: Go to next step
2.CHECK CASSETTE TAPE
a. Check the cassette tape.
1. Check that the cassette tape is a normal tape to which music or voice is recorded.
OK: Proper cassette tape to which music or voice is recorded.
NG: CASSETTE TAPE FAULTY
OK: Go to next step

3.REPLACE CASSETTE TAPE WITH ANOTHER AND RECHECK
a. Replace the cassette tape with another one and recheck.
1. Replace the cassette tape with another normal one to see if the same trouble occurs again.
OK: The function returns to be normal.
NG: REPLACE RADIO RECEIVER ASSY (SEE REPLACEMENT
)
OK: CASSETTE TAPE FAULTY
INSPECTION PROCEDURE
1.PRESS "EJECT" AND CHECK OPERATION
a. Press "EJECT" and check the operation.
1. Press the cassette tape EJECT switch of the radio receiver assembly for 2 seconds or more
and check that the cassette tape is ejected.
OK: The cassette tape is ejected.
NG: REPLACE RADIO RECEIVER ASSY (SEE REPLACEMENT
)
OK: Go to next step
2.CHECK CASSETTE TAPE
a. Check the cassette tape.
1. Check that the ejected cassette tape does not have the label peeled, cassette body deformation
or others.
OK: No fault on the cassette tape.
NG: CASSETTE TAPE FAULTY
OK: Go to next step
3.REPLACE CASSETTE TAPE WITH ANOTHER AND RECHECK
a. Replace the cassette tape with another and recheck.
1. Replace the cassette tape with another normal one to see if the same trouble occurs again.
OK: Malfunction disappears.
NG: REPLACE RADIO RECEIVER ASSY (SEE REPLACEMENT
)
OK: CASSETTE TAPE FAULTY

INSPECTION PROCEDURE
1.REPLACE CASSETTE TAPE WITH ANOTHER AND RECHECK
a. Replace the cassette tape with another one and recheck.
1. Replace the cassette tape with another normal one to see if the same trouble occurs again.
OK: Malfunction disappears.
OK: CASSETTE TAPE FAULTY
NG: Go to next step
2.CHECK FOR ANY FOREIGN OBJECT
a. Check for foreign objects.
1. Check that no foreign objects or defects are detected in the cassette tape player.
OK: No foreign objects or defects are detected.
NG: REMOVE FOREIGN OBJECT
OK: Go to next step
3.CLEAN HEAD AND CHECK OPERATION
a. Head cleaning
1. Raise the cassette door with your finger. Using a pencil or similar object, push in the guide.
2. Using a cleaning pen or cotton applicator soaked in cleaner, clean the head surface, pinch
rollers and capstans.
3. Check if the same trouble occurs again.
OK: Malfunction disappears.
NG: REPLACE RADIO RECEIVER ASSY (SEE REPLACEMENT
)
OK: HEAD DIRTY

Fig. 41: Raising Cassette Door
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INSPECTION PROCEDURE
1.CHECK FOR ANY FOREIGN OBJECT
a. Check for foreign objects.
1. Check that no foreign objects or defects are detected in the cassette tape player of the radio
receiver assy.
OK: No foreign objects or defects are detected.
NG: REMOVE FOREIGN OBJECT
OK: Go to next step
2.REPLACE CASSETTE TAPE WITH ANOTHER AND RECHECK (BELOW 90 MIN.)
a. Replace the cassette tape with another one and recheck.
1. Replace the cassette tape with another normal one (90 minutes or less) to see if the same

trouble occurs again.
OK: Malfunction disappears.
OK: CASSETTE TAPE FAULTY
NG: Go to next step
3.CLEAN HEAD AND CHECK OPERATION
a. Head cleaning
1. Raise the cassette door with your finger. Using a pencil or similar object, push in the guide.
2. Using a cleaning pen or cotton applicator soaked in cleaner, clean the head surface, pinch
rollers and capstans.
3. Check if the same trouble occurs again.
OK: Malfunction disappears.
NG: REPLACE RADIO RECEIVER ASSY (SEE REPLACEMENT
)
OK: HEAD DIRTY
Fig. 42: Raising Cassette Door

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CIRCUIT DESCRIPTION
This circuit provides the power to the radio receiver assy.
WIRING DIAGRAM
Fig. 43: Identifying Power Source Circuit (Radio Receiver Assy) Wiring Diagram

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INSPECTION PROCEDURE
1.INSPECT RADIO RECEIVER ASSY (+B, ACC, GND)

a. Disconnect the radio receiver assy connector R2.
b. Measure the resistance according to the value (s) in the table below.
TESTER CONNECTION CONDITION CHART
c. Measure the voltage according to the value (s) in the table below.
Standard:
TESTER CONNECTION CONDITION CHART
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS
TABLE or DIAGNOSTIC TROUBLE CODE CHART
Tester connectionConditionSpecified condition
GND - Body groundAlwaysBelow 1 ohms
Tester connectionConditionSpecified condition
+B - GNDAlways10 to 14V
ACC - GNDIgnition SW ACC10 to 14V

Fig. 44: Disconnecting Radio Receiver Assy Connector R2
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CIRCUIT DESCRIPTION
This circuit provides the power to the stereo component tuner.
WIRING DIAGRAM