LEXUS LS430 2003 Factory Repair Manual

Fig. 93: Inspecting Radio Receiver Assy
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NG: REPLACE RADIO RECEIVER ASSY (SEE REPLACEMENT
)
OK: Go to next step
2.CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSY - GATEWAY ECU)
a. Disconnect the connector from the radio receiver assy R2 and gateway ECU G3.
b. Measure the resistance according to the value (s) in the table below.
Standard:
TESTER CONNECTION CONDITION CHART
Tester connectionConditionSpecified condition
TX+ - GTX+AlwaysBelow 1 ohms
TX- - GTX-AlwaysBelow 1 ohms
TX+ - Body groundAlways10 kohms or higher

Fig. 94: Identifying Radio Assy Connector
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TX- - Body groundAlways10 kohms or higher

Fig. 95: Identifying Gateway ECU Connector
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NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN DIAGNOSTIC TROUBLE
CODE CHART
CIRCUIT DESCRIPTION
Each unit of the radio receiver assy system connected to AVC-LAN (communication bus) communicates by
transferring the signals from each switch.
When +B short and GND short occur in this AVC-LAN, radio receiver assy system will not function normally
as communication is discontinued.

In AVC-LAN, radio receiver assy becomes the communication master, and the radio receiver assy has enough
resistance necessary for transmitting the communication.
WIRING DIAGRAM
Fig. 96: Radio Receiver Assy
- Stereo Component Tuner Wiring Diagram
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INSPECTION PROCEDURE
1.INSPECT RADIO RECEIVER ASSY
a. Measure the resistance according to the value (s) in the table below.
Standard:
TESTER CONNECTION CONDITION CHART
Tester connectionConditionSpecified condition
TXM+ - TXM-Always60 to 80 ohms

Fig. 97: Inspecting Radio Receiver Assy
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
NG: REPLACE RADIO RECEIVER ASSY (SEE REPLACEMENT
)
OK: Go to next step
2.CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSY - STEREO COMPONENT
TUNER)
a. Disconnect the connector from the radio receiver assy R3 and stereo component tuner S31.
b. Measure the resistance according to the value (s) in the table below.
Standard:
TESTER CONNECTION CONDITION CHART
Tester connectionConditionSpecified condition
TXM+ - MTX+AlwaysBelow 1 ohms

Fig. 98: Identifying Radio Receiver Assy - Stereo Component Tuner Connector
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
TXM- - MTX-AlwaysBelow 1 ohms
TXM+ - Body groundAlways10 kohms or higher
TXM- - Body groundAlways10 kohms or higher

Fig. 99: Identifying Radio Receiver Assy - Stereo Component Tuner Connector
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN DIAGNOSTIC TROUBLE
CODE CHART

PRECAUTION
1. The automatic transmission is composed of highly precision-finished parts which need careful inspection
before reassembly because even a small nick could cause fluid leakage or affect performance. The
instructions here are organized so that you work on only one component group at a time. This will help
avoid confusion from similar-looking parts of different sub-assemblies being on your workbench at the
same time. The component groups should be inspected and repaired from the converter housing side.
Inspect, repair and reassemble as much as possible before proceeding to the next component group. If a
defect is found in a certain component group during reassembly, inspect and repair this group
immediately. If a component group cannot be assembled because parts are being ordered, be sure to keep
all parts of the group in a separate container while proceeding with disassembly, inspection, repair and
reassembly of other component groups. Recommended ATF: ATF WS
2. All disassembled parts should be washed clean and any fluid passages and holes should be blown through
with compressed air.
3. Dry all parts with compressed air. Never use shop rags.
4. When using compressed air, be careful not to not aim at yourself to prevent accidentally spraying ATF or
kerosene on your face.
5. Only recommended automatic transaxle fluid or kerosene should be used for cleaning.
6. After cleaning, the parts should be arranged in the correct order for efficient inspection, repairs, and
reassembly.
7. When disassembling a valve body, be sure to match each valve together with the corresponding spring.
8. New discs for the brakes and clutches that are to be used for replacement must be soaked in ATF for at
least 15 minutes before reassembly.
9. All oil seal rings, clutch discs, clutch plates, rotating parts, and sliding surfaces should be coated with
ATF prior to reassembly.
10. All gaskets and rubber O-rings should be replaced.
11. Do not apply adhesive cements to gaskets or similar parts.
12. Make sure that the ends of a snap ring are not aligned with one of the cutouts and are installed in the
groove correctly.
13. When replacing a worn bushing, the sub-assembly containing the bushing must also be replaced.
14. Check thrust bearings and races for wear or damage. Replace them as necessary.
15. Use petroleum jelly to keep parts in place.
16. When working with FIPG material, perform the following: Using a razor blade and a gasket scraper,
remove all the old packing (FIPG) material from the gasket surface.
Thoroughly clean all components to remove any loose material.

Clean both sealing surfaces with a non-residue solvent.
Parts must be reassembled within 10 minutes of application. Otherwise, the packing (FIPG) material must
be removed and reapplied.
ADJUSTMENT
1.BEFORE TRANSMISSION FILL
This transmission requires Toyota Genuine ATF WS transmission fluid.
After servicing the transmission, you must refill the transmission with the correct amount of fluid.
Fig. 1: Identifying Transmission Case Cover Bolts

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Maintain the vehicle in a horizontal position while adjusting fluid level.
Proceed to step 2 if you replaced the transmission pan, drain plug, valve body and/or torque
converter.
Proceed to step 3 after removing the two bolts, transmission case cover and refill plug if you
replaced the transmission hose, output shaft oil seal and/or radiator.

Fig. 2: Removing Refill Plug
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