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): 254 - 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 kg.cm, 7 - 9 ft. lbs.)
Coolant temperature sensor: 15 - 20 Nm (150 - 200 kg.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.

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

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

Use the Manual With the Right Hardware

When to See a Mechanic

Rather have a pro handle this?