2003 LEXUS LS430 ignition

Fig. 28: DTC Detecting Condition Chart (Physical address: 17D) [TEL])
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
HINT:
*1: Even if no failure is detected, a trouble code may be recorded depending on the battery
condition or engine start voltage.
*2: If the power connector is disconnected after the engine starts, this code is recorded after
180 seconds.
*3: This code may be stored if the ignition key is turned again after the engine starts.
*4: This code may be stored if the ignition key is held in the START position for one minute
or more before returning to the ON position.
*5: If the device is reported as not existing during verification, check the power source circuit
and AVC-LAN circuit for the device.
b. Logical address: 57 (telephone information drawing): 68 (TEL)
HINT:
Methods used to verify the cause of the problem are listed in order of probability in the verification
column.
Fig. 29: DTC Detecting Condition Chart

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3.AUDIO AND REAR A/C CONTROL SW (Physical address: 1CO) [Rr-CONT]
a. Logical address: 01 (Communication control)
HINT:
Methods used to verify the cause of the problem are listed in order of probability in the verification
column.

Fig. 30: DTC Detecting Condition Chart (Audio And Rear A/C Control SW)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
HINT:
*1: Even if no failure is detected, a trouble code may be recorded depending on the battery
condition or engine start voltage.
*2: If the power connector is disconnected after the engine starts, this code is recorded after
180 seconds.
*3: This code may be stored if the ignition key is turned again after the engine starts.
*4: This code may be stored if the ignition key is held in the START position for one minute
or more before returning to the ON position.
*5: If the device is reported as not existing during verification, check the power source circuit
and AVC-LAN circuit for the device.
4.GATEWAY ECU (Physical address: 1C6) [G/W]
a. Logical address: 01 (Communication control)
HINT:
Methods used to verify the cause of the problem are listed in order of probability in the verification
column.
Fig. 31: DTC Detecting Condition Chart

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HINT:
This code is stored 210 seconds after the power supply connector of the master component is
disconnected with the ignition switch in the ACC or ON position.
5.STEREO COMPONENT TUNER (Physical address: 1FO) [RADIO TUNER]
a. Logical address: 01 (Communication control)
HINT:

HINT:
*1: Even if no failure is detected, a trouble code may be recorded depending on the battery
condition or engine start voltage.
*2: If the power connector is disconnected after the engine starts, this code is recorded after
180 seconds.
*3: This code may be stored if the ignition key is turned again after the engine starts.
*4: This code may be stored if the ignition key is held in the START position for one minute
or more before returning to the ON position.
*5: If the device is reported as not existing during verification, check the power source circuit
and AVC-LAN circuit for the device.
b. Logical address: 60 (Radio)
HINT:
Methods used to verify the cause of the problem are listed in order of probability in the verification
column.
Fig. 33: DTC Detecting Condition Chart

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Fig. 34: DTC Detecting Condition Chart Physical (Address: 440)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
HINT:
*1: Even if no failure is detected, a trouble code may be recorded depending on the battery
condition or engine start voltage.
*2: If the power connector is disconnected after the engine starts, this code is recorded after
180 seconds.
*3: This code may be stored if the ignition key is turned again after the engine starts.
*4: This code may be stored if the ignition key is held in the START position for one minute
or more before returning to the ON position.
*5: If the device is reported as not existing during verification, check the power source circuit
and AVC-LAN circuit for the device.
7.THE INSPECTION LIST FOR THE DEVICE INDICATED BY THE SUB CODE
HINT:
Methods used to verify the cause of the problem are listed in order of probability in the verification
column.
Fig. 35: Inspecting List For Device Indicated By Sub Code

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decrease reception capacity, are installed.
OK: Optional components are installed.
OK: REMOVE OPTIONAL COMPONENTS AND CHECK AGAIN
NG: Go to next step
3.CHECK THE ANTENNA
a. Check the antenna for noise.
1. Turn the ignition switch to the ACC position, turn the radio on, and put the radio into AM
mode.
Contact the tip of a screwdriver on the antenna assy and check that noise can be heard from the speaker.
OK: Noise is heard from the speaker.
OK: REPAIR ANTENNA ASSY (SEE REPLACEMENT
)
NG: Go to next step
4.CHECK RADIO RECEIVER ASSY
a. Preparation for check
1. Remove the antenna plug from the radio receiver assy.
b. Check for noise

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03002400560056005c[
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
1. Turn the ignition switch to the ACC position with the radio receiver assy connector
connected.
2. Turn the radio on and put into AM mode.
3. Contacting a flat head screwdriver, thin wire, or other metal object against the radio
receiver's antenna jack, check that noise can be heard from the speaker.
OK: Noise occurs.
NG: REPLACE RADIO RECEIVER ASSY (SEE REPLACEMENT
)
OK: Go to next step
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

INSPECTION PROCEDURE

INSPECTION PROCEDURE
1.CHECK RADIO RECEIVER ASSY
a. Turn the ignition switch to the ACC position.
b. Press the eject switch for 5 seconds, and check if the disc is ejected.
OK: The disc is ejected.
NG: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS
TABLE
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.
Fig. 38: Checking CD

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NG: REPLACE THE CD
OK: Go to next step
3.CHECK RADIO RECEIVER ASSY
a. Insert another CD and check if it is ejected.
OK: The disc is ejected.
NG: REPLACE RADIO RECEIVER ASSY (SEE REPLACEMENT
)
OK: NORMAL OPERATION
INSPECTION PROCEDURE
1.CHECK SPEAKERS
a. Check the speaker unit installed condition.
1. Check that each speaker is securely installed.
OK: The problem goes away.
HINT:
The radio has a noise prevention function to reduce noise when listening to the radio. If a loud noise
occurs, check whether the ground at the antenna mounting base and the noise prevention unit are installed
and wired correctly.
NOISE CONDITION CHART
Noise ConditionsNoise Source
Depressing the accelerator pedal makes the noise louder. However, the noise
stops immediately when the engine is stopped.Alternator
Noise occurs while the A/C or heater is in operation.Blower motor
Noise can be heard during sudden acceleration on an unpaved road, or after the
ignition switch is turned ON.Fuel pump
Noise can be heard when the horn is pressed and released, or held down
continuously.Horn
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570003005600570052005300560003005a004b004800510003[the engine is
stopped.Ignition
Noise can be heard when the turn signal blinks.Flasher
Noise can be heard while window washer is in operation.Washer
Noise can be heard while the engine is running and continues after it is stopped.Water temperature
sensor
Noise can be heard while the wiper system is in operation.Wiper