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.
Coolant Temperature Sensor
Disconnect plug J1 from ECA. Connect an ohmmeter between pin 7 and ground. Resistance should be greater than 10,000 ohms. If resistance is less than 10,000 ohms, check wiring harness for a short to ground. Connect an ohmmeter to pins 7 and 12 of connector. Resistance should be as specified in Coolant Temperature Sensor Resistance table. If not, check wiring harness for open circuits or replace sensor.
| Temperature °F (°C) | Resistance (Ohms) |
|---|---|
| 0 (4) | 155,000 |
| 60 (16) | 95,000 |
| 200 (93) | 2350 |
| 240 (116) | 1300 |
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.