Supra Liftback L6-2997cc 3.0L DOHC MFI Twin-Turbo (1997)
Throttle Valve Solenoid: Description and Operation
Linear Solenoid For Accumulator Pressure Control
CIRCUIT DESCRIPTION
The shift solenoid valve SLN controls the hydraulic pressure action on the accumulator control valve when gears are shifted and per forms smooth
gear shifting.
The ECM determines optimum operating pressure according to the signals from the throttle position sensor, vehicle speed sensor and direct clutch
speed sensor and controls the volume of current flow to the solenoid valve.
The amount of current to the solenoid is controlled by the (*) duty ratio of ECM output signals, causing a momentary change to the hydraulic
pressure acting on the clutches during gear shifting. When the duty ratio high, the hydraulic pressure acting on the clutches is low.
(*) Duty Ratio The duty ratio is the ratio of the period of continuity in one cycle.
For example, if A is the period of continuity in one cycle and B is the period of non-continuity, then
Duty Ratio = A/A + B x 100 (%)
