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

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DISASSEMBLY
1. Drain the coolant down to sensor level or below.
2. Disconnect the battery ground 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 gauge by submerging it in hot engine coolant.
2. Check that the resistance is within the specified range.
Resistance:
At 70°C (158°F): 90.5-117.5 Ohms
At 115°C (239°F): 21.3-36.3 Ohms

Coolant Temperature Sensor

1. Heat the sensor by submerging it in hot engine coolant.
2. Check that the resistance is within the specified range.
Resistance:
At 20°C (68°F): 2.21-2.69 k Ohms
At 80°C (176°F): 264-328 Ohms

REASSEMBLY

1. Apply sealant to the threaded portion and tighten to the specified torque.
Tightening torque
Coolant temperature sender: 10-12 Nm (100-120 kgf-cm, 7-9 ft. lbs.)
Coolant temperature sensor: 15-20 Nm (150-200 kgf-cm, 11-14 ft. lbs.)
2. Connect the harness connector to the Coolant temperature sender and Coolant temperature sensor.
3. Connect the battery to ground cable.
4. Refill the system with clean coolant.