2003 LEXUS LS430 Factory Repair Manual

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Page 817 of 4500

LEXUS LS430 2003 Factory Repair Manual 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 INSP

Page 818 of 4500

LEXUS LS430 2003 Factory Repair Manual 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

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.

Page 819 of 4500

LEXUS LS430 2003 Factory Repair Manual 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

Page 820 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 2: Removing Refill Plug
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Page 821 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 3: Identifying Overflow Plug
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
2.TRANSMISSION PAN FILL
a. Remove the refill plug and overflow plug.
b. Fill the transmission through the refill hol

Page 822 of 4500

LEXUS LS430 2003 Factory Repair Manual HINT:
If you cannot add the listed amount of fluid, do the following:
1. Install the refill plug.
2. Allow the engine to idle with air conditioning OFF.
3. Move the shift lever through entire ge

Page 823 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 5: Identifying DLC3 Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
2. Select the tester menus: OBD/MOBD, ENGINE, DATA LIST and A/T.
3. Check A/T OIL TEMP.
4. Allow the engine to idl

Page 824 of 4500

LEXUS LS430 2003 Factory Repair Manual 4. The D shift indicator comes on again when the fluid temperature reaches 46°C (115°F) and
blinks when it exceeds 56°C (130°F).
5. Allow the engine to idle until the fluid temperature reaches

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