OEM 2004 Toyota Camry Knock Sensor

2004 Toyota Camry Parts Questions & Experts Answers

• Q: How to replace the knock sensor on 2004 Toyota Camry?

  A: The replacement process for the knock sensor begins with draining engine coolant followed by discharge of fuel system pressure. Remove the V-bank cover sub-assembly, air cleaner cap sub-assembly, emission control valve set, intake air surge tank, and intake manifold by disconnecting fuel pipe No. 1, removing the fuel pipe clamp, pinching the tube connector to pull out the fuel pipe, locking the hose clamp, disconnecting the heater inlet water hose, removing the nut to disconnect the ground cable, disconnecting the 6 fuel injector connectors, and loosening and removing the intake manifold's 9 bolts and 2 nuts in the specified order. Water outlet removal requires disconnecting the radiator hose inlet and ECT sensor connector and clamp followed by removing 2 bolts, 2 nuts and 2 washers. After locking the hose clamp users should remove the water outlet with water bypass hose No. 1 before taking off the 2 cylinder head gaskets. The procedure for the 1MZ-FE requires disconnecting the knock sensor connectors followed by the use of tools 09249-63010, 09816-30010 to remove the two knock sensors; the 3MZ-FE installation requires disconnection of sensor connectors followed by two nut removal then two knock sensor removals. Use Special Service Tool: 09249-63010, 09816-30010 for installing 1MZ-FE knock sensors which require torque to 39 N.m (398 kgf.cm, 29 ft.lbf) before connecting the 2 sensors. To install 3MZ-FE knock sensors apply 2 nuts then torque to 20 N.m (199 kgf.cm, 14 ft.lbf). The installation process begins with replacement of cylinder head gaskets and later includes fitting the water outlet with water bypass hose No. 1 followed by hose clamp unlocking and torquing 2 bolts and 2 nuts together with 2 washers to 15 N.m (153 kgf.cm, 11 ft.lbf). Next install the clamp, connect the ECT sensor connector and connect the radiator hose inlet. Next, install the intake manifold by tightening the 9 bolts and 2 nuts in the specified order to 15 N.m (153 kgf.cm, 11 ft.lbf), retighten the water outlet mounting bolts and nuts to 15 N.m (153 kgf.cm, 11 ft.lbf), install the ground cable with the nut to 8.4 N.m (86 kgf.cm, 74 in.lbf), connect the heater inlet water hose, and connect fuel pipe No. 1 by pushing the quick connector into the pipe until it clicks, checking for damage or contamination, and confirming a secure connection before installing the fuel pipe clamp. The installation process requires you to place the intake air surge tank followed by the emission control valve set then the air cleaner cap sub-assembly and verify vacuum hose connection and add engine coolant before examining fuel and coolant leaks and completing with the V-bank cover sub-assembly.