Accord L4-1829cc 1.8L SOHC ES, ET FI (1985)
Vacuum Controller: Testing and Inspection
Heat/Def & Vent/Def Solenoids
Fig. 3 Heat/Def & Vent/Def Solenoid Test
1.
Using a suitable ohmmeter, check for continuity between A and B, B and C, and C and A terminals, Fig. 3.
Fig. 4 Using Vacuum Pump To Test Heat/Def & Vent/Def Solenoid
2.
Connect a suitable vacuum pump to the solenoid and draw vacuum, Fig. 4. Solenoid should retain vacuum. If not, replace solenoid.
3.
Connect a lead from the battery positive terminal to the B terminal of solenoid, then another lead from battery negative terminal to C terminal.
Vacuum should drop to zero. If not, replace solenoid.
4.
Connect the solenoid operating vacuum motor to solenoid, then the battery positive lead to B terminal and negative lead to A terminal of solenoid.
5.
Draw vacuum. The solenoid vacuum motor arm should retract. If not, replace solenoid.