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

GM WORLDWIDE ENGINEERING STANDARDS 
GMW3110 
© Copyright 2010 General Motors All Rights Reserved 
February 2010 
Page 93 of 336 
Send ($7F $12 $78) /*for RequestCorrectlyReceived-ResponsePending */ 
….. 
Send ($52 $02 ….) /* positive response message */ 
ENDIF 
ENDIF 
OTHERWISE 
Send negative response ($7F $12 $12) /*for SubFunctionNotSupported-InvalidFormat */ 
ENDSELECT 
ENDFUNCTION 
8.3.7 Node Verification Procedure. 
Procedure 1: 
1. Send a request message with no data bytes following the service identifier and verify the $7F $12 $12 
response. 
2. Send a
 
readFailureRecordIdentifiers request message with more than 1 data byte following the service 
identifier and verify the $7F $12 $12 response. 
3. Send a
 
readFailureRecordParameters request message with more than 5 data bytes following the service 
identifier and verify the $7F $12 $12 response. 
4. Repeat step 3 using less than 5 data bytes following the service identifier and verify the $7F $12 $12 
response. 
5. Send a request message with an invalid sub-function parameter value and verify the $7F $12 $12 
response. 
Procedure 2: 
1. Send a valid readFailureRecordIdentifiers request message when the device has no failure records stored 
and verify the proper response which contains no data following the failureRecordDataStructureIdentifier. 
2. Send a valid readFailureRecordIdentifiers request message when the device has at least one failure 
record stored and verify proper response. 
3. Send a valid readFailureRecordParameters request message and verify proper response which includes 
data parameters for the failure record identifier. 
Procedure 3: 
1. Send a readFailureRecordParameters request message for a failure record with a failure record identifier 
(failure record number + DTC identifier) that does not correspond to a single unique failure record in the 
node and verify the $7F $12 $31 response. 
Procedure 4: 
1. If negative response code $78 is supported by the ECU, then create the conditions under which the ECU 
should return the $7F $12 $78 response and verify that proper response is sent. 
2. Repeat previous step of this procedure for each possible reason an ECU would send the negative 
response with response code $78. Verify this for each applicable supported sub-function parameter. 
Procedure 5: 
1. If negative response code $22 is supported by the ECU, then create the conditions under which the ECU 
should return the $7F $12 $22 response and verify that proper response is sent. 
2. Repeat previous step of this procedure for each possible reason an ECU would send the negative 
response with response code $22. Verify this for each applicable supported sub-function parameter.