What does a CHT sensor do?
A basic description of the sensor is that it is a thermistor device in which resistance changes with temperature. “On applications that do not use an engine coolant temperature (ECT) sensor, the CHT sensor is used to determine the engine coolant temperature.
Where is the CHT sensor located?
The Ford Transit cylinder head temperature sensor, or CHT, is used in the same way an engine coolant temperature sensor is. Located next to the cylinder head toward the back of the engine block, it monitors the temp of the head and sends this data to the van’s main computer.
How do you test a cylinder head temperature sensor with a multimeter?
Connect the black lead of the meter to the body of the cold sensor and the red to the terminal. You should have a reading of approximately 2000 ohms. Check the warm sensor in your engine. You should see a much lower reading on the ohm meter.
What happens when a ECT sensor goes bad?
One of the first symptoms associated with a problem with the coolant temperature sensor is poor fuel economy. If the coolant temperature sensor goes bad it can send a false signal to the computer and throw off the fuel and timing calculations. This will reduce fuel economy, and may hinder engine performance.
How do you test a CHT sensor?
Checking the ECT/CHT sensor Voltage: Another way to test the sensor is to measure the voltage across the sensor terminals with the ignition on. Checking the ECT sensor voltage. The sensor is connected to the engine computer (PCM).
How can you tell if a temperature sensor is bad?
- How to test a faulty thermocouple or resistance thermometer?
- Check if the -ve and +ve leads swapped.
- Check for any thermocouple cable wiring issues.
- Check for local heat source issues.
- Check Temperature Transmitter Settings.
- Check temperature controller settings.
- Troubleshooting temperature sensors with a multimeter.
How do you diagnose a bad ECT sensor?
What Signs May Signal Your Coolant Temperature Sensor May Be Failing?
- Poor Fuel Economy.
- Irregular Temperature Readings.
- Black Smoke from Your Exhaust.
- Your Engine is Overheating.
- Your Check Engine Light is On.