Coolant Temperature Sensor/Switch (For Computer): Testing and Inspection

1995 Hyundai Accent L4-1.5L SOHC Alpha EngineSECTION Testing and Inspection













CIRCUIT DIAGRAM





TROUBLESHOOTING PROCEDURES





USING SCAN TOOL





USING VOLTMETER








HARNESS INSPECTION PROCEDURES

SENSOR INSPECTION





1. Remove the engine coolant temperature sensor from the intake manifold.
2. With temperature sensing portion of engine coolant temperature sensor immersed in hot water, check resistance.





3. If the resistance deviates from the standard value greatly, replace the sensor.

INSTALLATION
1. Apply sealant LOCTITE 962T or equivalent to threaded portion.
2. Install engine coolant temperature sensor and tighten it to specified torque.

Engine coolant temperature sensor torque: 15-20 Nm (11-15 lb.ft)

3. Connect the harness connector securely.

TROUBLESHOOTING HINTS
If the fast idle speed is not enough or the engine gives off dark smoke during the engine warm-up operation, the engine coolant temperature sensor might be the causes.

RENDER: 1.0x

NO RELATED

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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.