Civic CVCC L4-1488cc 1500 EM1 (1982)
Fig.153 - Proper Voltmeter Connection
15. Push voltmeter probes into indicated terminals at control box No. 3 connector, Fig. 153.
16. Check for voltage at idle.
17. If there is no voltage, disconnect connector from thermosensor and check for continuity with coolant temperature above 158° F.
18. If there is no continuity, replace thermosensor and retest.
19. If there is continuity, check electrical connector and retest.
20. If there is still continuity, raise and support front of vehicle, block rear wheels, and apply hand brake.
21. Raise speed above 15 mph and check for voltage at EGR control solenoid valve connector.
22. If there is no voltage, check vacuum switch for continuity.
23. If there is continuity, replace vacuum switch.
24. If there is no continuity, replace speed sensor and retest.
25. If there is voltage, disconnect hose leading to vacuum switch at vacuum manifold with speed above 15 mph.
26. If there is no voltage at EGR control solenoid valve replace vacuum switch.
27. Connect vacuum gauge to hose No. 2 vacuum outlet.
28. If there is no vacuum, clean orifice in vacuum manifold and retest.
