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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.
$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.
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.
The data link connector (DLC) is the multi-pin diagnostic connection port for automobiles, trucks, and motorcycles used to interface a scan tool with the control modules of a given vehicle and access on-board diagnostics and live data streams.
1st flasher indicator light K, K1, P C2 2nd flasher indicator light K1, K2, K3, K4 C3 3rd flasher indicator light K3, K4 L indicator lights left HL, L54, VL R indicator lights right HR, R54, VR L54 lights out, left SBL R54 lights out, right SBR AC generator; 51 DC at rectifiers: 51e as 51, with choke coil 59 AC out, rectifier in, light switch
A sudden fail-open fault can cause multiple secondary failures if it is fast and the circuit contains an inductance; this causes large voltage spikes, which may exceed 500 volts. A broken metallisation on a chip may thus cause secondary overvoltage damage. [1]
In the United States, entry 49 CFR 564 in the Code of Federal Regulations requires manufacturers of headlight bulbs, officially known as "replaceable light sources", to furnish the National Highway Traffic Safety Administration (NHTSA) with product specifications at least 60 days prior to first use. [6]
Depiction of the no fault found cycle. Each clockwise cycle after the initial is a waste of maintenance resource. As the figure shows once a fault has been reported, investigated, and no fault found any future problems caused by the fault cause additional work which is a waste of maintainer time. Different causes have been suggested for this issue.