BMW driving engine temperature is too high

A 2006 BMW 730 Li sedan factory (using the N53 engine), Launch X431 the cumulative traveling 60,000 km, occur in the process of moving the engine temperature phenomenon.

It reflected the driver, the vehicle traveling in the normal course of the instrument have auto diagnostic tool appeared two times the engine temperature phenomenon, but stop after some time to re-start the engine, but also show the engine temperature normal. The car engine with electronic coolant pump, first check the coolant level normal. Start the engine, turn on air conditioning, electronic cooling fan is running. GT1 followed by detecting the engine electronic control unit (DME) in the fault store, transfer fault content obtained in the "Electronic Thermostat positive electrode short circuit", and displays the fault current exists at the frequency of 255 times. No other control unit fault code storage. According to tune obtained fault content analysis, that is because of the failure may damage electronic thermostat caused. Therefore recommends that customers replace electronic thermostat, replace it after a period of time after the test, the engine temperature is always displayed on the instrument properly, that failure has been ruled out, the car on the factory.

The factory with a 2 h, the owner called again calls for help, reflecting the car meter and display the engine temperature is too high, so I immediately sent a car repair center will be towed back to the car. Again with the fault obd2 code scanner detector and obtain fault code, the results did not trouble code is stored. Analysis of the car engine produces high-temperature conditions are found in each heat during high speed car, then the engine speed is high, the load is large. Check the radiator and found not clogged. Analysts believe that the problem is most likely in electronics cooling pump on.

Electronic cooling vehicle using engine heat pump is the management system is an important component for the thermal engine by the engine management system determines the amount of coolant. In some cases, the engine heat management system may make electronic coolant pump stopped working, such as the engine warm-up phase, the engine to quickly reach normal operating temperature; engine shutdown state, the pump may also work, such as engine After a long stop working after the operation, the coolant temperature will soar during.

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