Bruce Amacker Posted April 21, 2008 Share Posted April 21, 2008 Vehicles: Multiple E model ambulances from 04-06. Complaint: Will not run KOER with P1502 setting Code Description: Invalid test, APCM functioning Fault Trigger/Comments: Aborts test, KOER, CCT, Switch Test Probable Cause: APCM active while test is running This fleet of ambulances will not run the KOER. The trouble is, we could not find APCM's mounted anywhere, the techs state they did away with APCM's and hard wired the circuit into the ambulance package. I did this class last week and 3 units would not run the KOER. Sooo, is the APCM hidden away in never never land, or is it really hard wired in? If it is hard wired in, how would we disconnect it or enable the KOER? I can't believe how many million miles these units have run with nobody running a KOER. /forums/images/%%GRAEMLIN_URL%%/frown.gif Has anyone seen this before? Thanks! /forums/images/%%GRAEMLIN_URL%%/grin.gif Quote Link to comment Share on other sites More sharing options...
OHNO60 Posted April 21, 2008 Share Posted April 21, 2008 bruce been through this many times. The ambulance manufacturers use the pto wiring under the hood next to the booster for idle/charge controls. one of those wires is for pto enable and they apply ignition voltage to that wire so the pcm always thinks its in pto and waiting for the parking brake to complete the function. a temporary fix is to cut that wire and run the koer test and repair it when done or just add a relay to connect it for you wuth a trigger from the park wire located in the same area.i can send you a schematic i made tomorrow if you like. Quote Link to comment Share on other sites More sharing options...
DwayneGorniak Posted April 21, 2008 Share Posted April 21, 2008 Try this Bruce: https://www.fleet.ford.com/truckbbas/non-html/Q108.pdf or https://www.fleet.ford.com/truckbbas/non-html/Q162R1.pdf for the new models. Lots of info on this site. Quote Link to comment Share on other sites More sharing options...
Bruce Amacker Posted April 22, 2008 Author Share Posted April 22, 2008 Anthony and Dwayne: Thanks very much for the great info, I will forward it to the fleet and see if it helps. Thanks for the phone call yesterday too, Anthony. I know it is many times easier to explain things over the phone than type out a huge response. Have a great week! /forums/images/%%GRAEMLIN_URL%%/grin.gif Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.