2012 Toyota Highlander Limited, AWDFACTORY OEM SERVICE PROCEDURE

Knock Sensor: Removal: Removal

  1. REMOVE ENGINE UNDER COVER ASSEMBLY  . Refer to REMOVAL - Step 7
  2. REMOVE NO. 1 ENGINE UNDER COVER  . Refer to REMOVAL - Step 8
  3. DRAIN ENGINE COOLANT  . Refer to REPLACEMENT - Step 4
  4. DISCHARGE FUEL SYSTEM PRESSURE  . Refer to REMOVAL - Step 1
  5. REMOVE FRONT WIPER ARM AND BLADE ASSEMBLY LH  . Refer to REMOVAL - Step 1
  6. REMOVE FRONT WIPER ARM AND BLADE ASSEMBLY RH  . Refer to REMOVAL - Step 2
  7. REMOVE COWL TOP VENTILATOR LOUVER SUB-ASSEMBLY  . Refer to REMOVAL - Step 4
  8. REMOVE WINDSHIELD WIPER MOTOR AND LINK ASSEMBLY  . Refer to REMOVAL - Step 5
  9. REMOVE OUTER COWL TOP PANEL SUB-ASSEMBLY  . Refer to REMOVAL - Step 8
  10. REMOVE V-BANK COVER SUB-ASSEMBLY  . Refer to REMOVAL - Step 25
  11. REMOVE AIR CLEANER CAP SUB-ASSEMBLY  . Refer to REMOVAL - Step 5
  12. DISCONNECT ENGINE ROOM MAIN WIRE  . Refer to REMOVAL - Step 12
  13. REMOVE THROTTLE BODY BRACKET  . Refer to REMOVAL - Step 13
  14. REMOVE NO. 1 SURGE TANK STAY  . Refer to REMOVAL - Step 14
  15. REMOVE INTAKE AIR SURGE TANK ASSEMBLY  . Refer to REMOVAL - Step 15
  16. REMOVE NO. 2 ENGINE MOUNTING STAY RH  . Refer to REMOVAL - Step 16
  17. DISCONNECT FUEL MAIN TUBE  . Refer to REMOVAL - Step 17
  18. REMOVE INTAKE MANIFOLD  . Refer to REMOVAL - Step 19
  19. REMOVE KNOCK CONTROL SENSOR 
    1. Disconnect the 2 knock control sensor connectors.
      Fig 1: Locating Knock Control Sensor Connectors And Bolts
      GTY146483Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Remove the 2 bolts and then remove the 2 knock control sensors.
Factory Service Tools

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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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