Thermal Vacuum Valve: Testing and Inspection

Fig. 38a - EGR EFE EMR Thermal Vacuum Switch:

Below the switching point;
- Ports 1 and 2 and 3 and 6 should be connected
- Ports 4 and 5 should be sealed--Fig 38A.

Above the switching point;
- Port 1 should be connected to Port 5
- Port 2 should be connected to Port 6
- Port 3 should be connected to Port 4.


NOTE: Refer to the number stamped on the base of the switch or valve for calibrated switching or activation temperatures.