HELP with Code 16/ISC Stalling?

[UpRise_5.0]

Hi,

I ran the codes on my car and got a code 16.

16 (r):. ISC can't keep engine from stalling. Check for short to ground in ISC circuit.


What does this mean? Whats the ISC?

And its a 1989 5.0.

Thanks

 

[HISSIN50]

if i had to guess, i would say it is the idle speed controller. i think we normally call it the IAC (idle air controller).
this is just my guess.

 

[HISSIN50]

or we call it IAB (idle air bypass), also.

 

[Michael Yount]

The IAB (idle air bypass) solenoid bypasses air around the throttle body plate to help control idle speed. The ecu also advances/retards the timing to make idle speed adjustments.

Code 16 for a KOEO test indicates a problem with the IDM -- specifically that the ecu isn't receiving it's continuous ignition signal. It monitors ignition for a variety of uses - faults in the ignition system, rpm is used to control idle and many other calculations. Code 16 means the ecu isn't receiving the ignition signal it needs.