OEM 2005 Toyota Sienna Knock Sensor

2005 Toyota Sienna Parts Questions & Experts Answers

• Q: How to replace the Knock Sensor on 2005 Toyota Sienna?

  A: Begin the replacement of the Knock Sensor by discharging fuel system pressure together with draining engine coolant. Remove the front wiper arm head cap, both front wiper arms (LH and RH), the cowl top ventilator louver sub-assembly, the windshield wiper motor assembly, the cowl top to cowl brace inner No.1, the cowl top panel sub-assembly outer front, the V-bank cover sub-assembly, the air cleaner cap sub-assembly, the emission control valve set, the intake air surge tank, and the intake manifold by disconnecting fuel pipe No. 1, removing the EFI fuel pipe clamp, pinching the tube connector to pull out the fuel pipe, locking the hose clamp, disconnecting the heater water inlet hose B, removing the nut and ground cable, and disconnecting the six fuel injector connectors while following the specified bolt and nut removal sequence. First disconnect the radiator hose inlet from the water outlet of the engine and remove the engine mounting stay RH followed by the radiator reserve tank hose and its connector. Finally take off the clamp and associated bolts and washers and extract the two cylinder head gaskets. First disconnect both knock sensor connectors before detached two nuts to remove the sensors entirely. Secure the new knock sensors with two nuts that require 20 N.m torque (199 kgf.cm or 14 ft.lbf) and then connect all relevant connectors. Install new gaskets on the water outlet while torquing all bolts, nuts, washers to 15 N.m (153 kgf.cm, 11 ft.lbf) and complete the installation by connecting the engine coolant temperature sensor connector along with the radiator reserve tank hose and the radiator hose inlet. Install the engine mounting stay right-hand side with 23 N.m (235 kgf.cm, 17 ft.lbf) torque before using the specified sequence to tighten intake manifold bolts and nuts while keeping water outlet components and ground cable torque specifications. Secure the heater water inlet hose B and fuel pipe No. 1 routing with proper installation of the clamp. Final steps include installing the intake air surge tank together with the emission control valve set and air cleaner cap sub-assembly while also adding engine coolant and checking for fuel and engine coolant leaks before putting on the V-bank cover sub-assembly, cowl top panel sub-assembly outer front, cowl top to cowl brace inner No.1, windshield wiper motor assembly, cowl top ventilator louver sub-assembly, and both front wiper arms and front wiper arm head cap.