Temperature Gauge & Sender

Unplug connector at coolant temperature sender. Connect a 12-volt, 3.4-watt test light between wire and ground. Turn ignition on. Bulb should flash and gauge needle should vibrate.

Connect ohmmeter between sender terminal and body of sender. Check resistance while heating sender in water. See COOLANT TEMPERATURE SENDER RESISTANCE table. Replace sender if inaccurate.

COOLANT TEMPERATURE SENDER RESISTANCE

Model Type

Temperature: °F (°C)

Resistance (Ohms)

Camry, Celica Corolla (Exc. FX) & Supra

122 (50)

⁽¹⁾ 190-260

Camry, Celica Corolla (Exc. FX) & Supra

140 (60)

⁽²⁾ 152-154

Camry, Celica Corolla (Exc. FX) & Supra

239 (115)

⁽¹⁾ 24-28

Camry, Celica Corolla (Exc. FX) & Supra

239 (115)

⁽²⁾ 23-28

Pickup & 4Runner

140 (60)

143-174

Pickup & 4Runner

239 (115)

22-26

All Others

122 (50)

190-260

All Others

239 (115)

24-29

⁽¹⁾	For Nippondenso gauge.

⁽²⁾	For Yazaki gauge.

Check gauge resistance by measuring across terminals with ohmmeter. Ignition must be off and connector unplugged. See Figure-Figure . See FUEL & TEMPERATURE GAUGE RESISTANCE table.
Connect one end of test light to sender terminal and other end to battery voltage. With engine running, test light should flash. Test light should not light when engine is stopped.

NOTE: Bulb may come on briefly when engine is stopped, but bulb should not remain on.