Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSGEO1993PRIZM L4-1600CC 1.6L DOHCREPAIR AND DIAGNOSISENGINE, COOLING AND EXHAUSTCOOLING SYSTEMENGINE - COOLANT TEMPERATURE SENSOR/SWITCHCOOLANT TEMPERATURE SENSOR/SWITCH (FOR COMPUTER)SERVICE AND REPAIR
1993 Geo Prizm L4-1600cc 1.6L DOHC
Coolant Temperature Sensor/Switch (For Computer): Service and Repair
1993 Geo Prizm L4-1600cc 1.6L DOHCSECTION Service and Repair
ENGINE COOLANT TEMPERATURE (ECT) SENSOR REPLACEMENT
Remove or Disconnect
^ Drain engine coolant.
1. Negative (-) battery cable.
2. ECT sensor electrical connector.
3. ECT sensor from engine coolant inlet housing.
Install or Connect
1. ECT sensor to engine coolant inlet housing.
2. ECT sensor electrical connector.
3. Negative (-) battery cable.
Tighten
^ Negative (-) battery cable-to-negative (-) battery terminal retainer to 15 Nm (11 lb.ft).
Refill engine coolant to proper level.
Remove or Disconnect
^ Drain engine coolant.
1. Negative (-) battery cable.
2. ECT sensor electrical connector.
3. ECT sensor from engine coolant inlet housing.
Install or Connect
1. ECT sensor to engine coolant inlet housing.
2. ECT sensor electrical connector.
3. Negative (-) battery cable.
Tighten
^ Negative (-) battery cable-to-negative (-) battery terminal retainer to 15 Nm (11 lb.ft).
Refill engine coolant to proper level.
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.