Help-Crank Relearn E38 ECM
Thread Starter
Joined: May 2006
Posts: 1,170
Likes: 8
From: NW Chicago Burbs
Help-Crank Relearn E38 ECM I have an E38 ECM running my LY6 in my 72 Chevelle. Car runs good but I have 1 code P0315 Crankshaft Position System Variation Not Learned.
I have initiated the CASE with my scan tool but it does not allow it to complete.
Since Im running a TKO, I have no park/Neutral switch, CPP switch, or stop lamp signal hooked up to the ECM.
On my E38 pinout shows pin 1/C1 for park/neutral signal but thats on an auto harness only, I have a manual harness.
What pin should I wire to allow crank relearn?
If I ground pin 1/C1 will it work?
I have initiated the CASE with my scan tool but it does not allow it to complete.
Since Im running a TKO, I have no park/Neutral switch, CPP switch, or stop lamp signal hooked up to the ECM.
On my E38 pinout shows pin 1/C1 for park/neutral signal but thats on an auto harness only, I have a manual harness.
What pin should I wire to allow crank relearn?
If I ground pin 1/C1 will it work?
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Thread Starter
Joined: May 2006
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From: NW Chicago Burbs
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the parking brake is going to give you the issue. Bcm is in charge of that right?
The brake switch has to be hooked up to.
Honestly, unless your going for all out power, just delete the code and eventually it will learn itself "if you ever hit the pattern"
The brake switch has to be hooked up to.
Honestly, unless your going for all out power, just delete the code and eventually it will learn itself "if you ever hit the pattern"
Thread Starter
Joined: May 2006
Posts: 1,170
Likes: 8
From: NW Chicago Burbs
I cannot locate the Parking brake input on the E38 Pinout. do you know which pin it is?
I do have the pin for stop light signal, does it require +12volts or ground?
I will ground the CPP pin just for peace of mind.
I keep deleting the code but it pops rigth back up causing the fans to run and all that. I dont mind wiring the stuff, I just cant find the info on which way it needs to be wired.
If someone can answer the 2 above questions, I will get it done.
Delete the code in the tune. As in, go to DTCs, and set it to no error reported. BAM! Fixed.
Thread Starter
Joined: May 2006
Posts: 1,170
Likes: 8
From: NW Chicago Burbs
So will I still be able to do the relearn? Does the relearn really matter in my application?
TECH Resident
Joined: Apr 2008
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From: Right here, right now!
).Is there a procedure to follow? Have seen one for a truck.
Thks
Staging Lane
Joined: Jul 2011
Posts: 68
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This is old, but Anyone ever get this sorted out? I'm having a similar issue. tuner has tried everything and the car won't go above 4000 rpm. Tricked it once, but every time you shut if off and restart it, it defaults to the 4000 rpm issue and wants the relearn. Tuner says that even when he applies 12V to the brake pin, the ECM doesn't recognize it.
