Electric Load Vacuum Switching Valve

Testing
1. Disconnect electric load VSV hoses at three-way joints.
2. With ignition switch ``Off,'' blow air from end of one hose, then check that VSV valve has no continuity.
3. With ignition switch and headlamp switch ``On,'' blow air from end of one hose, then check that VSV has continuity.
4. Connect hoses. If checks are not satisfactory, disconnect VSV connector.
5. With ignition switch and headlamps ``On,'' check that 12 volts are present at white/red lead wire on wire harness side of disconnected connector. After checking, turn off switches.
6. Check that resistance between terminals on VSV side of disconnected connector is 51 - 57 ohms.

Adjusting
For idle-up adjustment, refer to ``Tune Up Section.''