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Radiator fan?
- gus2000
- New Member
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Public
04 Mar 2013 21:24 #64613
by gus2000
Hello markyp2000
The ECT Engine Coolant Temperature Sensor (sensor of water temperature) is attaching in the intake manifold. (Figure jimny SOHC)
If the water coolant is loss, or not circulating (pump o thermostat failure) the ECT sending the intake manifold temperature to the ECU and the thermometer.
In this condition, the information sending to the ECU is wrong; the intake manifold temperature is not the temperature of the engine. The temperature that interests is the temperature of the cylinder head.
The ECT has in its interior two sensors, one for the ECU, and other for the thermometer in speedometer
ECU Sensor, external pins in the photo. With engine at operating temperature 167 ohm, at 25 ºC 1885 ohms
Data acquired with ohmmeter
Manual data
Sensor for thermometer in speedometer:
Connection between central pin and ground. With engine at operating temperature, 33,8 ohm, at 25 ° C, 630 ohms
Data acquired with ohmmeter
Manual data
Simulation of high temp water failure with external resistors, for analyzing ECU response.
56 ohm across ECU. Simulates “engine overheatingâ€, in this case, air conditions compressor not operate, and running electrical fan.
gustavo
Replied by gus2000 on topic Radiator fan?
markyp2000 wrote: So tell me what measures the temperature of the engine then
Hello markyp2000
The ECT Engine Coolant Temperature Sensor (sensor of water temperature) is attaching in the intake manifold. (Figure jimny SOHC)
If the water coolant is loss, or not circulating (pump o thermostat failure) the ECT sending the intake manifold temperature to the ECU and the thermometer.
In this condition, the information sending to the ECU is wrong; the intake manifold temperature is not the temperature of the engine. The temperature that interests is the temperature of the cylinder head.
The ECT has in its interior two sensors, one for the ECU, and other for the thermometer in speedometer
ECU Sensor, external pins in the photo. With engine at operating temperature 167 ohm, at 25 ºC 1885 ohms
Data acquired with ohmmeter
Manual data
Sensor for thermometer in speedometer:
Connection between central pin and ground. With engine at operating temperature, 33,8 ohm, at 25 ° C, 630 ohms
Data acquired with ohmmeter
Manual data
Simulation of high temp water failure with external resistors, for analyzing ECU response.
56 ohm across ECU. Simulates “engine overheatingâ€, in this case, air conditions compressor not operate, and running electrical fan.
gustavo
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