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We got GEN3 Auto Trans Difference Answers....

Toyota Camry -- Electronics
(May, 1997; Page 44)
By Craig Nangle, Motor Age

Diagnosing electronic automatic transaxles is not always simple. Join us as we take the 'diagnostic fear' out of getting a third generation Camry into gear.

The first electronic transmission (electrically driven with no gear shift) was developed by E.M. Frazer in 1927. The first vehicle to feature electronic shifting (via a remote control gearshift, nick-named 'the electric hand') was a 1935 Hudson. Electronic transaxles/ transmissions, as we know them today, have been with us for almost three decades. However, manufacturers didn't bring them into production until the early '80s. One of the first manufacturers to equip its transmissions with electronic controls was Toyota, in 1983. Although Toyota's use of electronic controls has evolved in the past 15 years, their transaxle is still a simple mechanical machine.

A machine, by definition, is any device that allows you to do work (transmit energy). We know that a conventional automatic transaxle's operation is based on hydraulics. A hydraulic machine is something that is operated by a liquid under pressure. In this case, the liquid is automatic transaxle fluid (ATF). The ATF fills many roles inside a transaxle. It cools, lubricates, moves valves and pistons, and transmits torque from the engine to the transaxle via the torque converter. The transaxles covered in this article all use Dexron® II ATF.

The third generation (1992-'96) Camry can be equipped with one of three different 4-spd. automatic transaxles. Camry models equipped with 4-cyl. engines use the A140E transaxle and those equipped with the 6-cyl. engine use the A540E (1992-'93) or A541E (1994-'96) transaxles. The 1992-'93 models are equipped with the 3VZ-FE V6 engine and the 1994-'96 models are equipped with the 1MZ-FE V6 engine. The A541E transaxle is an enhanced version of the A540E model and it includes an enhanced electronic control system. The electronic control system on the A541E evolved from OBD I to OBD II. The hydraulic control systems, including the gear train and torque converter clutch, were also revised in order to be compatible with the new electronic system.

Transaxle basics

In an electronic transaxle, the shift and torque converter lockup timing are controlled by a computer in order to maximize driving comfort and performance as well as fuel economy. In addition to providing self-diagnostics and reducing gear shift shock, the electronic control also reduces vehicle 'squat,' which occurs when the vehicle starts out. All of this is achieved through the use of various sensors, switches, and actuators. In addition, a fail-safe mode is built into the control module programming so the transaxle will still operate when a malfunction occurs. The third generation Camry's transaxle and engine are both controlled by the powertrain control module (PCM).

continued here ;

Sadly reproduced with no permission, but with great admiration for the ability to tie them apples together.

I thought it was damn good, especially since I am shopping.
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