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Page 173
GM WORLDWIDE ENGINEERING STANDARDS
GMW3110
8.14.5.2 WriteDataByIdentifier(dataIdentifier). 
(Table 151)
Table 151: WriteDataByIdentifier(dataIdentifier=VIN)
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-FF)
$241
$10
$13
$3B
$90
"W"
"0"
"L"
"0"
N(USDT-FC)
$641
$30
$00
$00
---
---
---
---
---
T(USDT-CF)
$241
$21
"J"
"B"
"F"
"3"
"5"
"W"
"1"
T(USDT-CF)
$241
$22
"0"
"4"
"2"
"7"
"6"
"5"
---
N(USDT-SF)
$641
$02
$7B
$90
---
---
---
---
---
8.14.6 Node Interface Function.
8.14.6.1 Node Interface Data Dictionary (Table 152).
Table 152: Node Interface Data Dictionary of WriteDataByIdentifier Service Pseudo Code
Variable/Meaning
Values
message_data_length
Security_Access_Unlocked
Security_Access_Allowed
Reference Common/Global
Pseudo Code Data
Dictionary For Definition Of
These Flags/Variables
8.14.6.2 Node Interface Pseudo Code.
Powerup States:
None
Each time a $3B message is received, the following logic is executed:
BEGINFUNCTION Serv_3B_Msg_Recvd()
IF ($dataIdentifier is NOT supported)
send Negative Response ($7F $3B $31) /* RequestOutOfRange */

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ELSE IF (((message_data_length - 2)!= the expected length for $dataIdentifier) OR (message_data_length <
3)) THEN
send Negative Response ($7F $3B $12) /* Invalid Format */
ELSE IF ((any Data value in dataRecord[] is invalid for $dataIdentifier) OR
(($dataIdentifier requires security access) AND
(Security_Access_Unlocked = FALSE)) OR (($dataIdentifier requires security code access) AND
(Security_Access_Allowed = FALSE))) THEN
send Negative Response ($7F $3B $31) /* RequestOutOfRange */
ELSE IF (Conditions are not correct for writing to $dataIdentifier) THEN
send Negative Response ($7F $3B $22) /* ConditionsNotCorrect */
ELSE
IF (writing to $dataIdentifier will take more than P2
C 
ms) THEN
send Negative Response ($7F $3B $78) /* RequestCorrectlyReceived-ResponsePending */
ENDIF
Write data values from dataRecord[] to the memory address associated with the $dataIdentifier
send ($7B $dataIdentifier) positive response message