Interpreters Document

Request 
Byte
Value 
Byte Description 
6 or 13
CS 
1 byte request checksum 
CameraLoops.com

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
1993-2011 General Motors Company, GM Customer Care & Aftersales. All Rights Reserved.
Page
125 
(continued) 
Calculate checksum and copy into the service request (byte 6 or 13) 
Send Request Download Request and receive response (up to 10 Bytes) 
Goto KWP2000 Response Processing
If Request Download positive response is received 
Look for Request Download positive response Service ID ($74) in goto fields 
Else
Look for Request Download negative response, response code in goto fields 
Endif
If found
Goto appropriate step
Else 
Goto step indicated by FF goto field 
Endif
Typical Interpreter Line: (all Action and Goto fields are hex numbers) 
Step 
Op-Code 
Action Fields
Goto Fields 
10 
34 
00 00 00 00 
74 11 10 0D FF 99 00 00 00 00 
CameraLoops.com

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
1993-2011 General Motors Company, GM Customer Care & Aftersales. All Rights Reserved.
Page
126 
37 Op-Code: SR 37 for Request Transfer Exit 
 
Supported By:
KWP2000 Interpreter 2
 
 
Description: 
The 37 Op-Code will build a standard Service Request 37 to send to an ECU. A request 37 will Request 
Transfer Exit. A Request 37 may be required at the end of a reprogramming session after all of the Transfer 
Data requests are completed.
Action Fields: 
AC0: $00 - Not used 
AC1: $00 - Not used
AC2: $00 - Not used
AC3: Exceptions: $00 - Not used
 
Pseudo Code: 
XX 37 AC0 AC1 AC2 AC3 G0-G1 G2-G3 G4-G5 G6-G7 G8-G9 
Use KWP2000 Normal Response processing
Build Request Transfer Exit Request as indicated in the table below