Vacuum Solenoid Valves

1. Remove auto-cruise vacuum pump connector.

Fig. 16 Vacuum Solenoid Valve Inspection:

2. Measure resistance value between connector terminals 1 and 2, and connector terminals 2 and 4, Fig. 16.
3. Ensure solenoid valve makes an operating noise when battery voltage is applied between connector terminals 1 and 2, and connector terminals 2 and 4.
4. If there is a fault in the solenoid valve, replace speed control vacuum pump assembly.