2003 Lexus LS 430FACTORY OEM SERVICE PROCEDURE

Knock Sensor (1GR-FE): Replacement

WARNING: This page is about a different car, the 2005 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.
  1. REMOVE CYLINDER HEAD SUB-ASSY (SEE  REPLACEMENT  ) 
  2. DISCONNECT HEATER WATER INLET HOSE A 
    Fig 1: Disconnecting Heater Water Inlet Hose A
    G02578059Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. REMOVE WATER OUTLET PIPE NO. 1 
    1. Remove the 4 wire harness clamps.
    2. Remove the 3 bolts and the water outlet pipe.
    Fig 2: Removing Water Outlet Pipe No. 1
    G02578060Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. REMOVE KNOCK SENSOR 
    1. Disconnect the 2 knock sensor connectors.
    2. Remove the 2 bolts and the 2 knock sensors.
    Fig 3: Removing Knock Sensor
    G02578061Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. INSTALL KNOCK SENSOR 
    1. Install the 2 knock sensors with the 2 bolts as shown in Fig 4 .

      Torque: 20 N.m (204 kgf.cm, 15 ft.lbf) 

    2. Connect the 2 knock sensor connectors.
    Fig 4: Installing Knock Sensor
    G02578062Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. INSTALL WATER OUTLET PIPE NO. 1 

    Torque: 10 N.m (102 kgf.cm, 7 ft.lbf) 

  7. CONNECT HEATER WATER INLET HOSE A 
  8. INSTALL CYLINDER HEAD SUB-ASSY (SEE  REPLACEMENT  ) 
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