Tacoma Extra Cab 4WD L4-2693cc 2.7L DOHC MFI (1997)
Vacuum Switching Valve (VSV) for EGR: Testing and Inspection
VACUUM SWITCHING VALVE (VSV) FOR EGR INSPECTION
1. REMOVE VSV
(a) Remove the bolt.
(b) Disconnect the connector and 2 vacuum hoses from the VSV.
2. INSPECT VSV
A. Inspect VSV for open circuit
Using an ohmmeter. check that there is continuity between terminals.
Resistance: At 20°C (68°F): 33-39 Ohms
If there is no continuity, replace the VSV.
B. Inspect VSV for ground
Using an ohmmeter, check that there is no continuity between each terminal and the body.
If there is continuity, replace the VSV.
C. Inspect VSV operation
(a) Check that air does not flow from ports E to F.