Coolant Temperature Sensor Check

Ensure ignition is off. Unplug connector from sensor. For sensor location, see Fig 1, Fig 2 and Fig 3.

Fig 1: Coolant Temperature Sensor Location (3S-FE Engine)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 2: Coolant Temperature Sensor Location (3S-GE Engine)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 3: Coolant Temperature Sensor Location (3S-GTE "Turbo" Engine)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Using ohmmeter, check resistance between sensor terminals. Replace sensor if resistance is not within specification at specified temperature.

Fig 4: Coolant Temperature Sensor Specifications Chart