Engine Coolant Temperature (ECT) Sensor: Inspection

DRAIN ENGINE COOLANT
REMOVE V-BANK COVER
REMOVE INTAKE AIR CONNECTOR
DISCONNECT THROTTLE BODY FROM INTAKE MANIFOLDS (See REMOVAL )
REMOVE ECT SENSOR
1. Disconnect the ECT sensor connector.
2. Remove the ECT sensor and the gasket.
Fig 1: Removing ECT Sensor & Gasket
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT ECT SENSOR
Using an ohmmeter, measure the resistance between the terminals.
1. Resistance: Refer to Fig 2
  
  Fig 2: ECT Sensor Resistance/Temperature Graph
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
If the resistance is not as specified, replace the ECT sensor.
REINSTALL ECT SENSOR
1. Install a new gasket and the ECT sensor.
  1. Torque: 19.6 N.m (200 kgf.cm, 14 ft.lbf)
2. Connect the ECT sensor connector.
REINSTALL THROTTLE BODY TO INTAKE MANIFOLDS
Install a new gasket and the throttle body with the 2 bolts and 2 nuts.
1. Torque: 18 N.m (185 kgf.cm, 13 ft.lbf)
REINSTALL INTAKE AIR CONNECTOR
REFILL WITH ENGINE COOLANT (See REPLACEMENT )
REINSTALL V-BANK COVER