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  2. Lucas 14CUX - Wikipedia

    en.wikipedia.org/wiki/Lucas_14CUX

    Because the value from a given sensor is always stored at the same location in RAM, these sensor values can be read if the memory location is known. The 14CUX is capable of storing diagnostic trouble codes in a 32-byte segment of its internal memory that is maintained (even while vehicle ignition is off) by applying 5VDC ( regulated down from ...

  3. OBD-II PIDs - Wikipedia

    en.wikipedia.org/wiki/OBD-II_PIDs

    2.3 Service 03 - Show stored Diagnostic Trouble Codes ... Intake air temperature sensor -40 215 °C ... PID code (e.g.: 05 = Engine coolant temperature)

  4. 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.

  5. ELM327 - Wikipedia

    en.wikipedia.org/wiki/ELM327

    Read diagnostic trouble codes, both generic and manufacturer-specific. Clear some trouble codes and turn off the MIL ("Malfunction Indicator Light", more commonly known as the "Check Engine Light") Display current sensor data; Engine RPM; Calculated Load Value; Coolant Temperature; Fuel System Status; Vehicle Speed; Short Term Fuel Trim; Long ...

  6. Unified Diagnostic Services - Wikipedia

    en.wikipedia.org/wiki/Unified_Diagnostic_Services

    Unified Diagnostic Services (UDS) is a diagnostic communication protocol used in electronic control units (ECUs) within automotive electronics, which is specified in the ISO 14229-1. [1] It is derived from ISO 14230-3 and the now obsolete ISO 15765-3 (Diagnostic Communication over Controller Area Network (DoCAN) [2]). 'Unified' in this context ...

  7. Fault detection and isolation - Wikipedia

    en.wikipedia.org/wiki/Fault_detection_and_isolation

    Therefore, the low speed of the training phase is a limitation of SVMs when it comes to its usage in fault detection and diagnosis cases. [20] Time domain waveform (top) and CWTS (bottom) of a normal signal. Artificial Neural Networks (ANNs) are among the most mature and widely used mathematical classification algorithms in fault detection and ...

  8. Check engine light - Wikipedia

    en.wikipedia.org/wiki/Check_engine_light

    For example, in several Mazda models, the light will come on at 80,000 miles (130,000 km) and remain lit without generating a computer trouble code. [citation needed] Volvo had a light labeled "lambda", lambda sond being another name for oxygen sensor. This was done in order to remind the driver to change the oxygen sensor.

  9. Internal combustion engine cooling - Wikipedia

    en.wikipedia.org/wiki/Internal_combustion_engine...

    However, once water boils, it is an insulator, leading to a sudden loss of cooling where steam bubbles form. Steam may return to water as it mixes with other coolant, so an engine temperature gauge can indicate an acceptable temperature even though local temperatures are high enough that damage is being done. An engine needs different temperatures.

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