Tacoma 4WD V6-4.0L (1GR-FE) (2006)
1. Check that air does not flow from port E to port F.
If the operation is not as specified, replace the vacuum switching valve No. 1.
2. Apply battery voltage across the terminals.
3. Check that air flows from port E to port F.
If the operation is not as specified, replace the vacuum switching valve No. 1.