2004 Toyota Tundra Base, AutomaticFACTORY OEM SERVICE PROCEDURE

Knock Sensor: Inspection

  1. DRAIN ENGINE COOLANT 
  2. REMOVE AIR CLEANER HOSE 
  3. REMOVE NO. 2 TIMING BELT COVER (See  TIMING BELT (5VZ-FE)  ) 
  4. REMOVE INTAKE AIR CONNECTOR (See  CYLINDER HEAD (5VZ-FE)  ) 
  5. REMOVE FUEL PRESSURE REGULATOR (See  REPLACEMENT  ) 
  6. REMOVE INTAKE MANIFOLD ASSEMBLY (See  CYLINDER HEAD (5VZ-FE)  ) 
  7. REMOVE WATER BYPASS PIPE AND KNOCK SENSOR WIRE (See  CYLINDER BLOCK (5VZ-FE)  ) 
  8. REMOVE KNOCK SENSORS 

    Using SST, remove the knock sensor.

    SST 09817-16011

    Fig 1: Removing Knock Sensor
    G04208019Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  9. INSPECT KNOCK SENSORS 

    Using an ohmmeter, check that there is no continuity between the terminal and body.

    If there is continuity, replace the sensor.

  10. INSTALL KNOCK SENSORS 

    Using SST, install the knock sensor.

    SST 09817-16011

    Torque: 39 N.m (400 kgf.cm, 29 ft.lbf) 

  11. REINSTALL WATER BYPASS PIPE AND KNOCK SENSOR WIRE (See  WATER PUMP (5VZ-FE)  ) 
  12. REINSTALL INTAKE MANIFOLD ASSEMBLY (See  CYLINDER HEAD (5VZ-FE)  ) 
  13. REINSTALL FUEL PRESSURE REGULATOR (See  REPLACEMENT  ) 
  14. REINSTALL INTAKE AIR CONNECTOR (See  CYLINDER HEAD (5VZ-FE)  ) 
  15. REINSTALL NO. 2 TIMING BELT COVER (See  TIMING BELT (5VZ-FE)  ) 
  16. REINSTALL AIR CLEANER HOSE 
  17. REFILL WITH ENGINE COOLANT 
    Fig 2: Measuring Continuity Between Terminal And Body
    G04208020Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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