Sprint L3-61 1.0L (1988)
Idle-Up Compensator: Testing and Inspection
Air Conditioner VSV (Vacuum Switching Valve)
Testing
This test requires an ambient temperature of at least 50°F.
1.
Disconnect air conditioner VSV hoses from three-way joints.
2.
With ignition switch ``Off,'' blow air into end of one of the hoses and check for no continuity at VSV valve.
3.
Connect hoses. If checks were not satisfactory, disconnect VSV connector.
4.
With A/C switch and heater fan ``On,'' check for 12 volts at light green lead wire at disconnected connector.
5.
Check resistance between terminals of air conditioner VSV valve. Resistance should be 24 - 30 ohms at 68°F.
Adjust
1.
Operate vehicle until engine coolant reaches normal operating temperature.
2.
Disconnect all idle-up electrical loads such as headlamps, heater, cooling fan, etc., then ensure A/C switch is off.
3.
Connect a suitable tachometer to engine according to manufacturer's instructions, then check or adjust idle speed to 700 - 800 RPM. If necessary
to adjust idle speed, adjust by rotating idle adjusting screw in or out as necessary.
4.
Turn heater fan and A/C switch ``On.'' If engine RPM increases to 950 - 1050 RPM, the air conditioner VSV is properly adjusted and no
adjustment is necessary. If engine RPM is not as specified, rotate air conditioner VSV adjusting screw until specified RPM is obtained.
