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Home >> Toyota >> 2001 >> Tundra Base, Automatic >> Repair and Diagnosis >> Electrical >> Gauges >> Instrument Panels >> Component Tests >> Engine Coolant Temperature Gauge & Sender >> Engine Coolant Temperature (ECT) Sender

Engine Coolant Temperature (ECT) Sender

  1. Turn ignition switch to OFF position. Disconnect ECT sender 1-pin connector. See ENGINE COOLANT TEMPERATURE SENDER LOCATION  table. Drain cooling system and remove ECT sender. Place probe end of ECT sender and thermometer in a container of water. Connect an ohmmeter between ECT sender terminal and ECT sender body.
  2. Heat water and note resistance reading. See ENGINE COOLANT TEMPERATURE SENDER RESISTANCE  table. If resistance is not as specified, replace ECT sender.
ENGINE COOLANT TEMPERATURE SENDER LOCATION

Application Location
Highlander
4-Cyl. At Rear Of Cylinder Head
V6 Top Front Of Engine
Land Cruiser Top Front Of Engine
RAV4 Rear Of Cylinder Head, Exhaust Side
Sequoia, Tacoma & 4Runner
4-Cyl. Right Side Of Engine, Under Intake Manifold
V6 Left Cylinder Head
Sienna Top Of Engine
Tundra
V6 In Rear Of Intake Manifold
V8 In Front Water By-Pass Joint, Next To ECT Sensor
ENGINE COOLANT TEMPERATURE SENDER RESISTANCE

Application & Water Temp. °F (°C) Ohms
Highlander (1)
Land Cruiser, Sequoia, Sienna, Tacoma & Tundra
122 (50) 160-240
248 (120) 17-21
RAV4 (1)
4Runner
122 (50) 234-314
248 (120) 24-31
(1) Specification not available from manufacturer.