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/Switch (For Computer): Description and Operation
1985 Jaguar Vanden Plas L6-4.2LSECTION Description and Operation
Fig. 4 Water temperature sensor:
The water temperature sensor, incorporated into the thermostat housing, Fig. 4, monitors change in cooling water temperature and transmits a signal for the fuel enrichment to change the pulse duration during warm-up. The temperature sensing unit employs a thermistor which is very sensitive in the low temperature range. The electrical resistance of the thermistor decreases in response to the rise in water temperature.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.