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2. OBD-II PIDs - Wikipedia

   en.wikipedia.org/wiki/OBD-II_PIDs

   Service 02 accepts the same PIDs as service 01, with the same meaning, [5] but information given is from when the freeze frame [6] was created. Note that PID $02 is used to obtain the DTC that triggered the freeze frame. A person has to send the frame number in the data section of the message.

3. On-board diagnostics - Wikipedia

   en.wikipedia.org/wiki/On-board_diagnostics

   Service / Mode $02 makes Freeze Frame data accessible via the same PIDs. [33] See OBD-II PIDs#Service_02 for a list. Service / Mode $03 lists the emission-related "confirmed" diagnostic trouble codes stored. It either displays numeric, 4 digit codes identifying the faults or maps them to a letter (P, B, U, C) plus 4 digits.

4. Scan tool - Wikipedia

   en.wikipedia.org/wiki/Scan_tool

   OBD 1 vs OBD 2 the vehicle will also dictate what the scan tool is able to display. If the vehicle is equipped with OBD 1 it will have significantly less available data when compared to a vehicle equipped with OBD 2. [2] When a vehicle detects a problem, it generates a DTC code which is a unique code that corresponds to the specific problem ...

5. Talk:OBD-II PIDs - Wikipedia

   en.wikipedia.org/wiki/Talk:OBD-II_PIDs

   When a DTC is raised by the ECU it stores a freeze frame of data (eg rpm). This is often helpful when trying to figure out what caused the problem (eg maybe it raises a DTC for misfire but only when rpm is higher than 5000, which indicates maybe a weak coil). "Freeze DTC" merely indicates which DTC triggered the freeze frame data to be stored.

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 ( KWP2000 ) and the now obsolete ISO 15765 -3 (Diagnostic Communication over Controller Area Network (DoCAN) [ 2 ] ).

7. Keyword Protocol 2000 - Wikipedia

   en.wikipedia.org/wiki/Keyword_Protocol_2000

   In addition, there is an optional L-line for wakeup. The data rate is between 1.2 and 10.4 kilobaud, and a message may contain up to 255 bytes in the data field. [1] When implemented on a K-line physical layer KWP2000 requires special wakeup sequences: 5-baud wakeup and fast-initialisation. Both of these wakeup methods require timing critical ...