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  2. OBD-II PIDs - Wikipedia

    en.wikipedia.org/wiki/OBD-II_PIDs

    OBD-II PIDs (On-board diagnostics Parameter IDs) are codes used to request data from a vehicle, used as a diagnostic tool.. SAE standard J1979 defines many OBD-II PIDs. All on-road vehicles and trucks sold in North America are required to support a subset of these codes, primarily for state mandated emissions inspections.

  3. On-board diagnostics - Wikipedia

    en.wikipedia.org/wiki/On-board_diagnostics

    $03 Low sensor voltage threshold for switch time measurement; $04 High sensor voltage threshold for switch time measurement; $05 Rich-to-Lean switch time in ms; $06 Lean-to Rich switch time in ms; $07 Minimum voltage for test; $08 Maximum voltage for test; $09 Time between voltage transitions in ms; See OBD-II PIDs#Service_05 for a list.

  4. Wheel speed sensor - Wikipedia

    en.wikipedia.org/wiki/Wheel_speed_sensor

    This correction enables a larger maximum permissible air gap at the speed sensor. On a module m = 1 target wheel these new sensors can tolerate an air gap of 1.4 mm, which is wider than that for conventional speed sensors on module m = 2 target wheels. On a module m = 2 target wheel the new speed sensors can tolerate gap of as much as 2.2 mm.

  5. Category:Speed sensors - Wikipedia

    en.wikipedia.org/wiki/Category:Speed_sensors

    Wheel speed sensor This page was last edited on 28 November 2019, at 01:53 (UTC). Text is available under the Creative Commons ... Code of Conduct; Developers;

  6. Traction control system - Wikipedia

    en.wikipedia.org/wiki/Traction_control_system

    Each wheel is equipped with a sensor that senses changes in its speed due to loss of traction. The sensed speed from the individual wheels is passed on to an electronic control unit (ECU). The ECU processes the information from the wheels and initiates braking to the affected wheels via a cable connected to an automatic traction control (ATC ...

  7. Unified Diagnostic Services - Wikipedia

    en.wikipedia.org/wiki/Unified_Diagnostic_Services

    Clears diagnostic trouble codes (DTC's) from ECU memory. DTC grouping is used to loosely identify fault locations in undocumented ECU's. 0x14 00 00 00 to FF FF FF clears specific powertrain DTC's; 0x14 40 00 00 to 7F FF FF clears specific chassis DTC's; 0x14 80 00 00 to BF FF FF clears specific body DTC's

  8. Direct TPMS - Wikipedia

    en.wikipedia.org/wiki/Direct_TPMS

    direct TPM sensor fitted in valve system, manufacturer VDO. In most current designs of direct TPMS, a small electronic assembly which is rugged enough to be mounted inside a tire, measures the pressure using a microelectromechanical system (MEMS) [1] pressure sensor and then transmits this and other information to one or more vehicle receivers. [1]

  9. Direct torque control - Wikipedia

    en.wikipedia.org/wiki/Direct_torque_control

    Direct torque control (DTC) is one method used in variable-frequency drives to control the torque (and thus finally the speed) of three-phase AC electric motors. This involves calculating an estimate of the motor's magnetic flux and torque based on the measured voltage and current of the motor.

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