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  2. Check engine light - Wikipedia

    en.wikipedia.org/wiki/Check_engine_light

    When the computer detected a fault, it illuminated the MIL. Up until OBDII, on most cars the MIL could output codes. When two pins on the ALDL are jumped, the light would flash the codes, for instance (blink) (pause) (blink) (blink) for code 12. Some manufacturers, such as Honda, retained this feature even after OBDII.

  3. Blue screen of death - Wikipedia

    en.wikipedia.org/wiki/Blue_screen_of_death

    Preview builds of Windows 10, Windows 11, and Windows Server (available from the Windows Insider program) feature a dark green background instead of a blue one. [ 26 ] [ 27 ] [ 24 ] Windows 3.1, 95, and 98 supports customizing the color of the screen [ 28 ] whereas the color is hard-coded in the Windows NT family .

  4. Ignition timing - Wikipedia

    en.wikipedia.org/wiki/Ignition_timing

    Pressure in cylinder pattern in dependence on ignition timing: (a) - misfire, (b) too soon, (c) optimal, (d) too late. In a spark ignition internal combustion engine, ignition timing is the timing, relative to the current piston position and crankshaft angle, of the release of a spark in the combustion chamber near the end of the compression stroke.

  5. Fault detection and isolation - Wikipedia

    en.wikipedia.org/wiki/Fault_detection_and_isolation

    Fault detection, isolation, and recovery (FDIR) is a subfield of control engineering which concerns itself with monitoring a system, identifying when a fault has occurred, and pinpointing the type of fault and its location. Two approaches can be distinguished: A direct pattern recognition of sensor readings that indicate a fault and an analysis ...

  6. On-board diagnostics - Wikipedia

    en.wikipedia.org/wiki/On-board_diagnostics

    Service / Mode $07 is a Request for emission-related diagnostic trouble codes detected during current or last completed driving cycle. It enables the external test equipment to obtain "pending" diagnostic trouble codes detected during current or last completed driving cycle for emission-related components/systems.

  7. Engine knocking - Wikipedia

    en.wikipedia.org/wiki/Engine_knocking

    If the characteristic pressure peak of a knocking combustion is detected the ignition timing is retarded by steps of a few degrees. If the signal normalizes indicating a controlled combustion the ignition timing is advanced again in the same fashion keeping the engine at its best possible operating point - the so-called ″knock limit″.

  8. Pre-ignition - Wikipedia

    en.wikipedia.org/wiki/Pre-ignition

    Often one injector may clog while the others carry on normally allowing mild detonation in one cylinder that leads to serious detonation, then pre-ignition. [ 2 ] The challenges associated with pre-ignition have increased in recent years with the development of highly boosted and "downspeeded" spark ignition engines.

  9. Power-on self-test - Wikipedia

    en.wikipedia.org/wiki/Power-on_self-test

    The first memory location the CPU tries to execute is known as the reset vector. In the case of a hard reboot , the northbridge will direct a code fetch request to the BIOS located on the system flash memory .