2012 Toyota Highlander Limited, FWDFACTORY OEM SERVICE PROCEDURE

Engine Coolant Temperature Sensor: Removal: Removal

  1. REMOVE V-BANK COVER SUB-ASSEMBLY  . Refer to REMOVAL - Step 25
  2. REMOVE ENGINE UNDER COVER ASSEMBLY  . Refer to REMOVAL - Step 7
  3. REMOVE NO. 1 ENGINE UNDER COVER  . Refer to REMOVAL - Step 8
  4. DRAIN ENGINE COOLANT  . Refer to REPLACEMENT - Step 4
  5. REMOVE COOL AIR INTAKE DUCT SEAL  . Refer to REMOVAL - Step 1
  6. REMOVE BATTERY  . Refer to REMOVAL - Step 2
  7. REMOVE NO. 2 AIR CLEANER INLET  . Refer to REMOVAL - Step 3
  8. REMOVE NO. 1 AIR CLEANER INLET  . Refer to REMOVAL - Step 4
  9. REMOVE AIR CLEANER CAP SUB-ASSEMBLY  . Refer to REMOVAL - Step 5
  10. REMOVE AIR CLEANER CASE SUB-ASSEMBLY  . Refer to REMOVAL - Step 6
  11. REMOVE ENGINE COOLANT TEMPERATURE SENSOR 
    1. Disconnect the engine coolant temperature sensor connector.
      Fig 1: Identifying Engine Coolant Temperature Sensor Connector
      GTY172163Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Remove the engine coolant temperature sensor and gasket.
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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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