Civic CVCC L4-1488cc 1.5L EW1, EW3 (1985)
Fig. 13 Connecting hand pump gauge to vacuum hose.
3.
Start engine and allow to reach normal operating temperature, then disconnect hose from power valve and connect suitable vacuum gauge to hose.
Figs. 12 and 13. With engine running, vacuum should be present. If vacuum is present, proceed to step 5. If vacuum is not present, check for
voltage at power valve control solenoid valve in the emission control box.
4.
If voltage is present, check control unit. If voltage is not present, disconnect #20 hose at check valve inlet side and check for vacuum. If vacuum is
present and check valve operation is satisfactory, replace power valve control solenoid valve. If vacuum is not present, check vacuum lines for
disconnected hoses, leaks or blockage.
5.
Ground red wire of control unit, then check for vacuum to power valve. Vacuum to power valve should not be present. If vacuum is not present,
system is satisfactory. If vacuum is present, check for voltage at power valve control solenoid valve in emission control box. If voltage is not
present, check control unit. If voltage is present, replace power valve control solenoid valve.
