CODE 18

Code 18 - SPOUT out or wiring fault - look for short to ground in SPOUT wiring going back to the computer.
Possible bad TFI.

Remove the passenger side kick panel and disconnect the computer connector.
There is a 10 MM bolt that holds it in place. Disconnect the TFI module connector
from the TFI and the measure the resistance between the yellow/lt green wire and ground.
You should see greater than 100 K (100000) ohms.
Don't hold onto the metal tips of the probes when making measurements. You will get incorrect readings.
Next measure the resistance between the yellow/lt green wire on the TFI module connector and
Pin 36 on the computer connector. With the SPOUT plug in place, you should see less than 2 ohms.

The following is a view from the computer side of the computer connector.


Diagram courtesy of Tmoss & Stang&2birds





It is a good idea to use the sig under the user control panel (User CP) option. It allows you to post your car year & mods, which help greatly
when troubleshooting things. No, it is not there for us to snoop and see any "Secrets" you have hidden away under the hood. Be a good
stangnetter and update you sig for future reference & don't keep us guessing.

Are the batteries in your ohmmeter good? Select ohms, low range or Continuity on your meter and short the probe tips together. You should see .1-.8 Ohms.