RAV4 (EM03T0U)
227
Previous automatic transaxle have selected each gear shift using mechanically controlled throttle hydraulic pressure,
governor hydraulic pressure and lock–up hydraulic pressure. The electronically controlled transmission, however, electrically
controls the line pressure, throttle pressure, lock–up pressure and accumulator pressure etc. through the solenoid valve. The
electronically controlled transmission is a system which precisely controls gear shift timing and lock–up timing in response to
the vehicle’s driving conditions and the engine condition detected by various sensors. It makes smooth driving possible by
shift selection for each gear which is the most appropriate to the driving conditions at that time, and by preventing downing,
squat and gear shift shock when starting off.
1. Gear Shift Operation
During driving the engine warm up condition signal is input from engine coolant temp. sensor to TERMINAL THW of the
engine control module, and the vehicle speed signal is input from the speed sensor to skid control ECU with actuator, and
are sent to the engine control module through communication control. At the same time, the throttle valve opening signal is
sent from the throttle position sensor to the TERMINALS VTA1 and VTA2 of the engine control module, as the throttle angle
signal.
2. Lock–Up Operation
When the engine control module decides based on each signal that the lock–up condition has been met, the current flows
through TERMINAL DSL of the engine control module to TERMINAL 3 of the electronically controlled transmission solenoid
to GROUND.
3. Stop Lamp SW Circuit
If the brake pedal is depressed (Stop lamp SW on) when driving in lock–up condition, a signal is input to TERMINAL STP of
the engine control module. The engine control module operates and cuts the current to the solenoid to release lock–up.
: Parts Location
Code See Page Code See Page Code See Page
A3 56 B3 53 (2AZ–FE) E13 54
A4 56 B4 B 53 (2AZ–FE) E19 54
A9 A 52 (2AZ–FE) B24 53 (2AZ–FE) E40 55
A19 52 (2AZ–FE) B26 53 (2AZ–FE) E68 55
A35 56 B27 53 (2AZ–FE) E69 55
A36 56 B28 53 (2AZ–FE) E70 55
A38 56 B30 C 53 (2AZ–FE)
B1 53 (2AZ–FE) E3 54
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