Thermal Vacuum Valve: Testing and Inspection

Test Conditions:
- Engine oil temperature 50°C (122°F) minimum

Test Sequence:
- Switch ignition on.





- Disconnect vacuum hose -5- from EGR two-way valve -N161- (item -1-).
- Disconnect vacuum hose -3- from EGR two-way valve and blow into hose.
The EGR two way valve must allow air to pass to vacuum pump connection (flow not blocked)
- Disconnect 2-pin harness connector -2- from EGR two-way valve -1-.
- Blow again into vacuum hose -3-.
The vacuum connection to vacuum pump must be closed and outlet to outside (arrow) open.