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Engine control unit defective
The relay switches the engine control power on and off, allowing the engine to start and stop.
Costs
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Most Expensive
Cheapest case
Discussions
User of our Carly Community asked the following questions regarding that fault:
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Details
Probability
Based on the values and symptoms you have entered, a crude estimation of the probability of this problem can be made
HIGH
Typical consequences
If this defect is detected, it may lead to the following problems:
- Engine start not possible
- Failure of the general inspection (may not apply in your country)
Function of engine control
The engine control unit is the head of the engine control system. Based on sensors, it regulates fuel injection and ignition in gasoline engines. In addition to these main tasks, the MSG coordinates many other components for optimum engine running.
To control current-intensive actuators, such as electric fans or ignition systems, the MSG uses relays. These allow the cable cross-section and thus the space requirement of the MSG to be kept small. However, the relay contact surfaces are subject to stresses that can lead to contact resistances and reduced current flow.