Страница 1 мировой engineering стандарты общая спецификация

9.3.2.2 Calibrations. 
Calibrations shall be capable of being programmed separately from the operational
software. This allows for assembly plant programming of only calibrations. Deviations from this requirement
must be agreed upon by appropriate release responsible engineer, service operations and manufacturing
representatives and shall be documented in the CTS.

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25.06.2020
WORLDWIDE ENGINEERING STANDARDS General Motors Local Area Network Enhanced Diagnostic Test Mode Specification
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Each calibration module shall have its own unique identifier retrievable via the ReadDataByIdentifier ($1A)
service.
The ECU shall support either one or both of the following methods of programming calibrations.
•
Programming an individual calibration module.
•
Programming multiple (or all) of the calibration modules during a single programming event.
9.3.2.3 Boot Software Description and Requirements. 
All SPS programmable ECUs that support
programming of the operational software shall contain boot software in a boot memory region. ECUs that
support boot software shall continue to execute out of the boot until a complete set of Operational software and
calibrations are programmed.
The boot memory shall be protected against inadvertent erasure such that a failed attempt to modify program
calibrations or operational software does not prohibit the ability of the ECU to recover and be programmed
after the failed attempt. The ECU shall be able to recover and be reprogrammed if any of the following error
conditions occur during the programming process.
1. Loss of supplied power connection.
2. Loss of the ground connection.
3. Disruption of GMLAN communication.
4. Over or under voltage conditions.
Boot software resides in the boot memory region and is the software that an ECU begins executing upon
powerup. Transfer of program control to the boot software also occurs once the ECU is informed that it is
about to be programmed (refer to the $34 service). All SPS Programmable ECUs operating out of Boot
memory shall not transmit any normal communication messages or any unsolicited diagnostic messages.
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