PCM re-learn
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Senior User
Joined: Jul 2008
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that works. i unplugged it and ran the truck. so plugging it back in the PCM will pick back up even if their are codes triggered? no CEL came on. i believe i have the procedure.
PCM Relearn Stragey:
To do this drive the truck for 15 minutes and get it to operating temp. Then turn the truck off and disconnect both batteries for at least 20 seconds. Then reconnect the batteries. Now cycle the glow plugs on then off twice. Now start the truck. Do not move the truck now, Let it idle for at least 7 minutes. During this time you will hear the exhaust note change, this is the truck learning a strategy. Make sure the truck is hot, if it isn't it will not work right. Then drive it - vary the driving conditions for 30 minutes.
PCM Relearn Stragey:
To do this drive the truck for 15 minutes and get it to operating temp. Then turn the truck off and disconnect both batteries for at least 20 seconds. Then reconnect the batteries. Now cycle the glow plugs on then off twice. Now start the truck. Do not move the truck now, Let it idle for at least 7 minutes. During this time you will hear the exhaust note change, this is the truck learning a strategy. Make sure the truck is hot, if it isn't it will not work right. Then drive it - vary the driving conditions for 30 minutes.
Cargo Master
Joined: Mar 2007
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