Fault caused by ECU of electronic control engine computer
Release time:
2023-12-29
The electronic control engine computer ECU cannot monitor the failure caused by the following reasons. (1) Generally, the ECU of low-end cars cannot monitor the failure of the high-voltage ignition circuit caused by the ignition coil not working, the spark plug is contaminated or damaged, and the high-voltage wire core is broken. (2) ECU cannot monitor the blockage of the intake filter and fuel filter pipeline of the electric gasoline pump, and the fuel inlet failure caused by the flattening of the intake pipe or return pipe.
The electronic control engine computer ECU cannot monitor the failure caused by the following reasons.
(1) Generally, the ECU of low-end cars cannot monitor the failure of the high-voltage ignition circuit caused by the ignition coil not working, the spark plug is contaminated or damaged, and the high-voltage wire core is broken.
(2) ECU cannot monitor the blockage of the intake filter and fuel filter pipeline of the electric gasoline pump, and the fuel inlet failure caused by the flattening of the intake pipe or return pipe.
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(3) The ECU cannot monitor the air filter inlet or the air filter is blocked or throttled. A method to solve the fault or vibration caused by the change of air flow. Product brand summary Mercedes-Benz maintenance and repair common accessories
(4) ECU cannot monitor the level of cylinder pressure or the uniformity of each cylinder pressure
(5) The ECU cannot monitor the damage of the plug and pin, but it will generate a fault code caused by this situation. (6) The ECU cannot monitor the poor grounding, but it will generate a fault code caused by this situation
(7) The ECU cannot monitor the leakage or throttling of the vacuum line of the vacuum booster in the engine control system. However, the vacuum of the intake manifold absolute pressure sensor will be monitored and the ECU will also record a fault code.
The above 10 items are the causes of failures that cannot be detected by the electronic control engine, and you need to pay attention when repairing the electronic control engine. Whether it is an electronic control failure or a mechanical failure, the location and performance characteristics must be correctly distinguished in order to accurately and quickly determine and eliminate the failure
During the inspection, if the engine fails and the engine failure warning light is not lit (the failure code is not displayed), it means that the engine failure may be in the mechanical part.
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