On-vehicle Inspection ON-VEHICLE INSPECTION PROCEDURE 1. REMOVE V-BANK COVER SUB-ASSEMBLY   2. INSPECT VACUUM SWITCHING VALVE ASSEMBLY (for ACIS) (a) Disconnect the vacuum switching valve connector. 
 (c) Check the vacuum switching valve operation. 
 
 (3) When applying a vacuum to port F, check that air is sucked into port E. If the result is not as specified, replace the vacuum switching valve assembly. (d) Connect the vacuum switching valve connector. 3. INSTALL V-BANK COVER SUB-ASSEMBLY    | 
Toyota Tundra Service Manual > Sfi System: Crankshaft Position - Camshaft Position Correlation (Bank 1 Sensor A) (P0016-P0019)
   DESCRIPTION In the VVT (Variable Valve Timing) system, the appropriate intake and exhaust valve open and close timing is controlled by the ECM. The ECM performs intake and exhaust valve control by performing the following: 1) controlling the camshaft and camshaft timing oil control valve, and operat ...