Chassis — A340E Automatic Transmission; Ecm (Engine Control Module) - Toyota Supra User Booklet

3) Function
The following are the functions of the valves used in the A340E automatic transmission of the 2JZ–GTE engine
model and those used in the A340E of the 7M–GTE engine model.
Transmission
A340E
No.
(F (For
2JZ–GTE) 7M–GTE)
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
(11)
(12)
(13)

* ECM (Engine Control Module)

CHASSIS — A340E AUTOMATIC TRANSMISSION
A340E
Component p
(For (F
Manual Valve
Primary Regula-
tor Valve
No. 5 Solenoid
—
Valve
Cut–Back Valve
— Cut–Off Valve
2nd Coast
Modulator
Valve
Low Coast
Modulator Valve
C Orifice
1
—
Control Valve
Secondary
Regulator Valve
Solenoid
—
Modulator Valve
No. 3 Solenoid
Valve
Solenoid Relay
—
Valve
Lock–Up Relay
Valve
Function
Connected to the shift lever, this valve regulates line pressure
from the primary regulator valve according to the shift lever
position.
Regulates the line pressure from the oil pump to each compo-
nent according to the engine load.
Controlled by ECM* [Engine ECU], this valve regulates the
solenoid pressure, generates regulated throttle pressure, and
applies the throttle pressure to the primary regulator valve.
Regulates the throttle pressure applied on the primary regula-
tor valve to effect secure engagement of the clutches and
brakes in 1st, reverse, or "2" range 2nd gear.
The rate of 2nd modulator pressure supplied to the 2nd coast
brake (B ) is controlled by switching the orifices to reduce the
1
time lag while shifting manually from the "D" to "2" range.
This also reduces the impact when the transmission shifts
from 1st to 2nd gear while it is in the "2" range.
While in 2nd gear in the "2" range, this valve regulates the
line pressure from the 1–2 shift valve. This produces the 2nd
modulator pressure which is applied to the 2nd coast brake,
ensuring a smoother 2nd coast brake engagement.
While in the "L" range, this valve regulates the line pressure
from the 2–3 shift valve. This produces the low modulator
pressure which is applied to the 1st and reverse brake (B
ensuring a smoother 1st and reverse brake engagement.
The switching of orifices changes the flow of line pressure
from the manual valve directed to the forward clutch (C
controls the engaging speed of C
Controls the hydraulic pressure directed to the torque convert-
er, oil cooler, and for lubrication.
This valve regulates the line pressure applied to the No. 3 and
No. 4 solenoid valves and stabilizes the solenoid pressure.
This valve is controlled by ECM* [Engine ECU] signals
which regulates the line pressure from the solenoid relay
valve. The solenoid pressure that has thus been created is ap-
plied to the lock–up relay valve and the lock–up control
valve.
The solenoid pressure from the No. 3 solenoid valve is
switched between the lock–up relay valve, lock–up control
valve, or C orifice control valve, to permit or prevent lock–
2
up operation.
Switches the flow of torque converter pressure between the
torque converter lock–up clutch and oil cooler.
137
),
3
) and
1
.
1