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Toyota A-540E, A-540H & A-541E Transmission Manual
1999 Lexus ES300 is equipped with a U140E automatic transaxle. For diagnosis
of this transaxle, see LEXUS U140E & U140F OVERHAUL article or LEXUS
U140E & U140F ELECTRONIC CONTROLS article.
CAUTION:
All models are equipped with a Supplemental Restraint System (SRS).
When servicing vehicle, use care to avoid accidental air bag deployment.
All SRS electrical connections and wiring harness are covered by Yellow
insulation. SRS-related components are located in steering column, center
console, instrument panel and lower panel on instrument panel. DO NOT
use electrical test equipment on these circuits. If necessary, deactivate
SRS before servicing components. See AIR BAG DEACTIVATION
PROCEDURES article in GENERAL INFORMATION.
DESCRIPTION:
The A-540H 4WD transaxle has a center differential and electronic transfer case attached. Transaxle internal components are the same or similar to the A-540E and A-541E transaxles. Transaxle has 4 shift solenoids in the valve body to control engagement speed and throttle pressure for shift feel. Torque is distributed to front and rear wheels at all times to maximize traction of 4WD vehicle. The A-540E and A-541E transaxles feature a torque converter with lock-up clutch, 4-speed planetary gear unit, differential, hydraulic control system, shift solenoids and electronic control system. The A-541E transaxle has an additional shift solenoid in the valve body to control engagement speed and throttle pressure for shift feel. A shift lock mechanism is used to minimize possibility of incorrect operation of transaxle.
1999 Lexus ES300 is equipped with a U140E automatic transaxle. For diagnosis
of this transaxle, see LEXUS U140E & U140F OVERHAUL article or LEXUS
U140E & U140F ELECTRONIC CONTROLS article.
CAUTION:
All models are equipped with a Supplemental Restraint System (SRS).
When servicing vehicle, use care to avoid accidental air bag deployment.
All SRS electrical connections and wiring harness are covered by Yellow
insulation. SRS-related components are located in steering column, center
console, instrument panel and lower panel on instrument panel. DO NOT
use electrical test equipment on these circuits. If necessary, deactivate
SRS before servicing components. See AIR BAG DEACTIVATION
PROCEDURES article in GENERAL INFORMATION.
DESCRIPTION:
The A-540H 4WD transaxle has a center differential and electronic transfer case attached. Transaxle internal components are the same or similar to the A-540E and A-541E transaxles. Transaxle has 4 shift solenoids in the valve body to control engagement speed and throttle pressure for shift feel. Torque is distributed to front and rear wheels at all times to maximize traction of 4WD vehicle. The A-540E and A-541E transaxles feature a torque converter with lock-up clutch, 4-speed planetary gear unit, differential, hydraulic control system, shift solenoids and electronic control system. The A-541E transaxle has an additional shift solenoid in the valve body to control engagement speed and throttle pressure for shift feel. A shift lock mechanism is used to minimize possibility of incorrect operation of transaxle.
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