General Specification Electrical Function gmw3110 General Motors Local Area Network Enhanced Diagnostic Test Mode Specification

 
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$02 
readFailureRecordParameters 
Allows a tester to read the failure record data parameters for a single failure record. 
Failure record data parameters consist of important ECU inputs, outputs, and calculated 
values which provide information about the operating conditions of the vehicle at the time 
the DTC is logged. Examples of failure record data parameters might include engine 
revolutions per minute (rpm), vehicle speed, etc. Valid failure record identifier data values 
are obtained by the tester from the readFailureRecordIdentifiers ($01) level of this service.
 
M 
$00 
$03 thru 
$FF 
ReservedByDocument 
This value is reserved by this document for future definition.
 
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8.3.2.2 Request Message Data Parameter Definition (Table 58). 
Table 58: ReadFailureRecordData Request Message Data Parameter Definition 
Definition 
failureRecordIdentifier 
The failureRecordIdentifier bytes are only included in the request message if the sub-function parameter is 
readFailureRecordParameters ($02). The failureRecordIdentifier consists of 4 bytes which includes the failure 
record number and the DTC identifier (2 byte DTC number + 1-byte DTC fault type). This format allows for 
maximum flexibility as it allows ECUs to store a single failure record per DTC, or to store multiple failure 
records for each new occurrence of the same DTC.
 
8.3.3 Positive Response Message Definition. 
Below are the tables which describe the format and content of 
positive responses corresponding to the sub-function level of the request message and the structure of the 
data record (using PIDs or DPIDs). 
8.3.3.1 Positive Response Message - $Level $01 (readFailureRecordIdentifiers). 
The response to a 
readFailureRecordIdentifiers ($01) request contains the failureRecordDataStructureIdentifier parameter and 
the failure record identifiers for each failure record linked to a stored DTC within the node. See Table 59. If the 
node has no failure record identifiers linked to a stored DTC, then the response to a 
readFailureRecordIdentifiers 
request 
shall 
only 
contain 
the 
level 
byte 
and 
the 
failureRecordDataStructureIdentifier parameter. 
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