Supra Liftback L6-2997cc 3.0L DOHC MFI Twin-Turbo (1997)
Throttle Valve Solenoid: Description and Operation
Linear Solenoid For Lock-Up Control
CIRCUIT DESCRIPTION
The shift solenoid valve SLU is provided for lock-up operations. The lock-up operation pressure is controlled by the newly adopted linear solenoid
for smooth engagement.
The amount of current flow to the solenoid is controlled by the (*) duty ratio of the ECM output signal. The higher the duty ratio becomes, the
higher the lock-up hydraulic pressure becomes during the lock-up operation.
(*) 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 (%)
