Help! Grounded diagnostic connector

[JOHNNYB]

HI, I AM ADJUSTING MIN IDLE AND TPS AND IN THE PROCESS IT SAYS TO GROUND DIAGNOSTIC CONNECTOR THEN TURN KEY TO ON POSITION AND WAIT 30 SEC. BEFORE DISCONNECTING AIC TO SET MIN IDLE BUT WHEN I GROUND TERMINAL A+B AT TOP RIGHT OF CONNECTOR THEN TURN KEY TO ON POSITION THE RADIATOR FAN COMES ON. I WAS JUST WONDERING IF THAT IS NORMAL :W

THANK YOU FOR ANY REPLIES

 

[vetteoz]

Correct ,
when in "diagnostic " mode which you are by grounding the ALDL the ECM runs the fan

 

[JOHNNYB]

correct ,
when in "diagnostic " mode which you are by grounding the aldl the ecm runs the fan

thanx you`ve been a lot of help lately greatly appreciated:bow