Replacement shift and pressure control solenoids with the internal harness for Toyota and Lexus U140E, U140F and U240E automatics with harsh or delayed shifts.
This kit is aimed at one group of cars: the 3.0-liter V6 Toyotas and Lexus models from the turn of the century that use the Aisin U140 four-speed automatic. If your 2002-2004 Camry V6, 2001-2003 Highlander, 2002-2003 Solara, or 1999-2003 RX300 binds on the 1-2 shift, slips or hesitates in Reverse, or shudders at cruise with a solenoid code stored, this is the complete electrical side of the valve body in one box. The solenoids come from the factory already wired to a new internal harness and case connector, so nothing gets spliced. It is a new kit, not a remanufactured one.
On these V6 cars the engine computer handles shifting. It reads throttle and road speed, then drives the solenoids on the bottom of the valve body. Per Sonnax's firing chart, SL1 and SL2 are both on in first, only SL2 stays on in second, all three shift solenoids are off in third, and S4 comes on for fourth. A separate linear solenoid sets line pressure, and the DSL solenoid locks the converter. DSL is normally closed and has two other jobs: it applies the B2 clutch in manual low and blocks oil to B2 in Reverse. The harness carries every one of those signals through hot fluid to the case connector. After twenty years, its insulation hardens and a cracked wire can mimic a failed coil.
Start with the cheap test. Unplug the transmission connector with the engine running and select Reverse. With every solenoid unpowered, Reverse should still engage. If it does not, the DSL solenoid or the B2 control valve is the suspect. If Reverse does engage, the computer is the stronger suspect, and Toyota's own bulletin TC002-06 dealt with faulty ECMs on 2001-2003 RAV4s that set this same code group. Reset the learned adaptive values before you buy anything, because both sources note that a reset alone sometimes cures the binding. Then measure each circuit at the case connector, and flex the harness while you watch the meter. Our solenoid testing guide walks through those checks, and Aisin harsh and delayed shift causes covers the hydraulic faults that feel the same.
The listed applications are the 1999-2002 Lexus ES300 3.0L, 1999-2003 Lexus RX300 3.0L, 2002-2004 Toyota Camry 3.0L, 2001-2003 Highlander 3.0L and 2002-2003 Solara 3.0L. The kit is also cross-referenced to the U140F and the U240 family. Four-cylinder versions of these cars and some ES300 years used other Aisin transmissions, so the 3.0L label alone does not settle it. Read the transmission code on the tag or build data, check whether you have the front-drive U140E or the all-wheel-drive U140F, then match connector shape and bracket positions to the photos. Sonnax splits these valve bodies at 1999-2005 and 2006-2012, so this harness is for the earlier group. Send us the year and VIN and we will check it. Every Aisin part we carry is on the Aisin transmission parts page.
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Both. The solenoid set comes pre-wired to a new internal harness and case connector, so you replace the whole electrical path from the connector to each solenoid.
The 2001-2003 Highlander 3.0L is a listed application and the kit is cross-referenced to the U140F all-wheel-drive version. Confirm the code on your transmission and match the connector and brackets, or send us your VIN.
It will if the DSL solenoid is stuck open or the harness is faulty. Do the unplugged-connector Reverse test first and reset adaptive values; if Reverse works with the connector off, look at the computer before buying parts.
Intermittent solenoid codes on cars this age often come from cracked insulation inside the case. Heat and vibration open and close the circuit. Replacing the harness with the solenoids removes that cause.
Use the Toyota ATF your owner's manual lists. Manuals for these model years call for Type T-IV. Check the level with the fluid hot, then reset adaptive values and drive through all four gears.
