Lock-Up System - Honda Prelude 1993 Service Manual

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Lock-up System

h l5r-l position in 2nd, 3rd and 4th, and I 03 | position in 3rd, pressurized fluid is drained jrom the back oJ the torque convsrtsr

th;o6h an oil passage, causing the lock-up piston to be held against the torquo converter cover. As this takes pl8cs, th€

mainshstt rotates at the same sp€ed as the engine crankshaft. Together whh hydraulic control, th€ TCM optimizos the timing of

the lock-up system. Under cenain conditions, the lock-up clutch is applied during decsleration, in 3rd 8nd 4th sp66d.

The lock-up systam controls the range of lock-up according to lock-up control solenoid vav€s A and B,8nd throttle valve B'

When lock-up control solenoid vslves A and B activate. modulstor pressure changes. Lock-up controlsolenoid valvos A 8nd B

are mounted on the torque converter housing, and are controlled by the TCM,

When used, "left" or "right" indicates directlon on the flowchart,

L O C K U P I I

c o N r R o L l l

S O L E N O I D I l

L O C K u p C O N T R O L

V A L V E : A l l

S O L E N O T O

F E G U L A T O F

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