The on-board computer is capable of monitoring all of the sensors and actuators to determine whether they are working as intended. It can detect a malfunction or deterioration of the various sensors and actuators, usually well before the driver becomes aware of the problem.
When Bob Dylan sang “The times they are a-changing,” he probably wasn’t referring to changes in the automotive repair industry. But as we know, there are very few things that change as rapidly as electronic fuel control systems and emissions components. Keeping up with new model year changes is hard enough, not to mention the […]
Motronic 1.8 was followed by Motronic 4.3-4, which added the ability to perform OBD-II systems fault monitoring. While the Motronic control unit on all of these systems controls ignition timing, it also ensures that the ignition coil is optimally charged, regardless of engine speed. The two knock sensors on the Volvo’s five cylinder engine, along […]
Checking timing, ignition, fuel quality, fuel delivery, filters and engine condition are very important basics that have a bearing on how a computer controls various engine systems.
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