Prom burned code?
Thread Starter
Instructor
Joined: Apr 2013
Posts: 229
Likes: 2
Prom burned code?
I just put a new ecm on my project 85 and used the original prom.I get a code 15 which is coolant sensor voltage high and I tried clearing it to no avail.The old coolant sensor was corroded an I replaced it.So i'm asking is it possible for the old prom to have the code 15 permanently burned into its memory and not clearing itself?
Racer
Joined: Dec 2006
Posts: 499
Likes: 27
From: shapleigh maine
Probably has a shorted wire. Codes are not "latch on" in early systems.
You will need to check the wiring carefully at the sensor. Most replacement sensors come with a new pigtail because the originals short out.
You will need to check the wiring carefully at the sensor. Most replacement sensors come with a new pigtail because the originals short out.
Thread Starter
Instructor
Joined: Apr 2013
Posts: 229
Likes: 2
the connector could very well be the problem.The wires don't come out very far when you unplug the connector and its gonna be a pain to strip and reconnect them to new connector with so little room to work.
