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

 
Note:
The TesterPresent ($3E) messages Necessary to keep periodic responses active are not shown in the 
example. 
8.19.5.2 ReadDataByPacketIdentifier Stop Periodic Messages Positive Response. 
In the example below (Table 198): 

The tester sends a ReadDataByPacketIdentifier request with the sub-function parameter = $00 
(StopSending), and no additional data parameters. This causes the Node to stop sending all scheduled 
DPIDs. 

The Node then confirms the performed action with a UUDT positive response message with the 
MessageNumber = $00. 

DPIDs active for periodic transmission not shown in example below. 
Table 198: ReadDataByPacketIdentifier Request ($Level = $00) - Single UUDT Positive Response 
T = Frame Sent By Tester, N = Frame Sent By Node; shaded region indicates PCI 
Frame Type 
CAN Id 
#1 
#2 
#3 
#4 
#5 
#6 
#7 
#8 
T(USDT-SF) 
$241 
$02 
$AA 
$00 
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N(UUDT-SF) 
$541 
$00 
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Note:
The ECU(s) shall first disable the scheduler prior to sending the positive UUDT response message. 
8.19.5.3 ReadDataByPacketIdentifier Request Single Shot UUDT Frame(s) Positive Response. 
In the 
example below (Table 199): 

The tester sends a ReadDataByPacketIdentifier request with the sub-function parameter = $01 
(SendOneResponse), with DPIDs $A1 and $22 as data parameters. 

DPID $A1 contains three bytes of data. 

DPID $22 contains two bytes of data.

The example below is independent on whether scheduling is active or not at time of request. 
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