Honda Prelude 1993 Service Manual page 487

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Half Lock-up

Lock-up ControlSolenoid Vafue A: ON

Lock-up Controlsolenoid Valve B:ON

The modulator pressure is released by the solenoid valve B, causing the modulator pressure in the l€ft cavity of ths

controlvalve to lower.

Also the modulator pressure in the leJt cavity ot the lock-up timing v8lve is low. However the throttle B pressuro is still low

thjs.time; consequently, the lock-up timing valve is kept on the righi side by the spring force.

With the lock-up controlsolenoid valve B turned on, the lock-up controlvalve is moved somewhat to tho lelt side, causing

back pressure (F2) to lower. This allows a greater amount of the fluid (Fi ) to work on the lock-u; ;bich ;; 8s ro engage

clutch. The back pressure (Fa which stillexists prevents the clutch from engaging fully.

When used, "left" or "right" indicates direction on the flowchart.

MODULATOR PRESSURE

!3:i",3,3"J:'&?."

T O F O U E C O N V E R T E R

C H E C K V A L V E

Troubleshooting