Idle Air Control (IAC) Valve Connector End View/Part Information/Terminal Identification (MR140)

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		PED 12040754 4-Way Metri-Pack 150 Series (BK)
Pin	Wire Color	Circuit No.	Function
A	PU/BU	-	Idle Air Control (IAC) B Low Control
B	D-BU	-	Idle Air Control (IAC) B High Control
C	L-GN/BK	-	Idle Air Control (IAC) A Low Control
D	GN	-	Idle Air Control (IAC) A High Control