Control System - Honda Prelude 1993 Service Manual

Control System
The control system for this mechanism, as shown below, constantly monitors the changes in engine status such as load,
rpm and vehicle speed. this intormation is transmitted to the Engine Control Module {ECM).
Valv€ Timing ChEnge Conditions
Englne Speed: 4,9OO nm or higher
Vohicle Spood: 19 mph (3O km/hl 01 tastel
Engino Coolant Temperature: lrtooF {6OoC) or higher
Control System
VTEC SOLENOID VALVE
F.oft
OIL PUMP +
VTEC PRESSURE SWITCH
Et{Gtt{E
CONTROL
MODULE
{ECM)
5-7