Toyota Highlander 4WD V6 Variable Induction System Diagnosis (1MZ-FE) | 2003 Model
4. VACUUM SWITCHING VALVE ASSY NO.1
a. Using an ohmmeter, check that there is continuity between each terminals.
Resistance: 33 - 39 Ohms at 20°C (68°F)
b. Check that air flows form port B to port C.
c. Apply battery voltage across the terminals.
d. Check that air flows from port B to port A.