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GM WORLDWIDE ENGINEERING STANDARDS
GMW3110
8.7.3.1 Positive Response Message Data Parameter Definitions (Table 94).
Table 94: Request Message Data Parameter Definition
Definition
memoryAddress
The parameter memoryAddress is an echo of the memoryAddress value contained in the request message
identifying the starting memory location address of the memoryDataRecord[] bytes which follow.
memoryDataRecord[]
The memoryDataRecord[] shall contain the actual data values contained in the sequence of memory locations
defined by the memoryAddress and memorySize parameters.
8.7.4 Supported Negative Response Codes (RC_). 
The following negative response codes (Table 95) shall
be implemented for this service.
Table 95: Supported Negative Response Codes
Hex
Description
Cvt Mnemonic
12
SubFunctionNotSupported-InvalidFormat
Request message is not the correct number of bytes (3 + number of bytes used
for memoryAddress parameter).
M
SFNS-IF
22
conditionsNotCorrectOrRequestSequenceError
This response code shall be sent if the operating conditions of the ECU are
such that it cannot perform the required action. (e.g., one or more of the
address(es) requested is stored in a satellite device and the link from the host to
the satellite device has failed). This response code is not intended to be used if
the ECU conditions are such that the request temporarily cannot be performed
(e.g., the data must be retrieved from another processor internal to the ECU via
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an SPI bus and would not be available within the required P2
C 
time). Response
code $78 is used when conditions are temporarily not met. If a node supports
this response code, the reason(s) to generate this response code must be
documented in the CTS, SSTS, or supplemental diagnostic specification
referenced by either of the two preceding documents.
31