Coolant Temperature Sensor/Switch (For Computer): Service and Repair

REMOVAL
1. Drain the coolant down to sensor level or below.
2. Disconnect the battery 9 round cable and disconnect the engine harness connector from the sender & sensor.
3. Remove the sender & sensor.

INSPECTION
Coolant Temperature Sender





1. Heat the engine coolant temperature sender by submerging it in hot water.
2. Check that the resistance is within the specified range.
Resistance
90.5 - 117.5 ohms at 70°C (158°F)
21.3 - 26.3 ohms at 115°C (239°F)

Coolant Temperature Sensor





1. Heat the sensor by submerging it in hot water.
2. Check that the resistance is within the specified range.
Resistance
2.27 - 2.73 K ohms at 20°C (68°F)
290 - 354 ohms at 80°C (176°F)

INSTALLATION





1. Apply sealant to the threaded portion and tighten to the specified torque.
Tightening torque
Coolant temperature sender 10 - 12 Nm (100 - 120 kg.cm, 7 - 9 ft. lbs.)
Coolant temperature sensor 15 - 20 Nm (150 - 200 kg.cm, 11 - 15 ft. lbs.)
2. Connect the harness connector to the coolant temperature sender, coolant temperature sensor.
3. Connect the battery ground cable.
4. Refill the system with clean coolant.