Vacuum Switching Valve ASSY No.1 (3MZ-FE): Replacement

WARNING: This page is about a different car, the 2004 Lexus ES 330. However, it is still accessible from the selected car via links, so may be relevant.

DISCONNECT ENGINE WIRE NO. 3 (BATTERY NEGATIVE TERMINAL)
REMOVE V-BANK COVER SUB-ASSY (See REPLACEMENT )
REMOVE EMISSION CONTROL VALVE SET (See DUTY VACUUM SWITCHING VALVE (3MZ-FE) )
REMOVE VACUUM SWITCHING VALVE ASSY NO. 1
1. Remove the 2 screws, then remove the vacuum surge tank.
  
  Fig 1: Removing Screws
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the vacuum hose.
3. Remove the vacuum hose.
4. Remove the screw, then remove the vacuum switching valve No. 1.
  
  Fig 2: Disconnecting Vacuum Hose
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSTALL VACUUM SWITCHING VALVE ASSY NO. 1
INSTALL EMISSION CONTROL VALVE SET (See DUTY VACUUM SWITCHING VALVE (3MZ-FE) )
CHECK CONNECTION OF VACUUM HOSE
INSTALL V-BANK COVER SUB-ASSY (See REPLACEMENT )
CONNECT ENGINE WIRE NO. 3 (BATTERY NEGATIVE TERMINAL)
Torque: 5.4 N.m (55 kgf.cm, 48 in.lbf)
SYSTEM INITIALIZATION (See PRECAUTION )