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

3.6.2.1.4 WHILE Statement. 
While statements are used to execute a body of code as long as a relational 
expression evaluates TRUE. The statement uses the keywords WHILE and ENDWHILE to mark the beginning 
and ending of this type of statement. When the pseudo code hits a line with a WHILE keyword, the relational 
expression in parenthesis after the WHILE is evaluated. If the relational expression evaluates TRUE, the body 
is executed. The body is indented one level and ends with the last statement above the ENDWHILE keyword. 
WHILE (relational expression) 
body when expression is TRUE 
ENDWHILE 
3.6.2.1.5 REPEAT Statement. 
Repeat statements are very similar to while statements except that the 
relational expression evaluated to determine when to stop executing the body code is not checked until after 
the body is executed. The body code will always be executed at least one time. The keywords REPEAT and 
UNTIL mark the beginning and ending of this type of statement. An example of this statement is included 
below: 
REPEAT 
body when expression is TRUE (performed at least once) 
UNTIL (relational expression) 
3.6.2.1.6 CALL Statement. 
A CALL statement is used to invoke a procedure/subroutine. The 
procedure/subroutine may be defined in the description of another diagnostic service within this specification, 
or referenced from another specification (e.g., GM LAN Handler Specification). Upon completion of the 
procedure/subroutine, control is returned to the point immediately after the CALL statement. An example is 
included below: 
IF (relational expression) THEN 
CALL function( ) 
ENDIF 
3.6.3 Common/Global Pseudo Code Data Dictionary. 
Following the pseudo code is a data dictionary that 
defines the variables and flags used in the pseudo code. Several diagnostic services share common variables 
or flags with other diagnostic services. The table below contains the list of the common or global pseudo code 
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