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 needed Tech 2 to force the relearn on my 02 Z-28. Heard HP tuner can do it but not sure .

 

I am using a Dashhawk to initiate the relearn, but it just says it did not complete. I think I need to wire something, Just not exactly sure what.

 

CASE is tricky to complete. It's a bit of a procedure.

 

It also says you sometimes have to run the procedure 5 times before it completes.

 

It says the brake pedal is required. Pin 9 is the stop lamp switch signal, does anyone know if it requires 12v or ground?

 

Isn't it pin 33 on blue (TCC Brake Switch Signal) ?

No idea if it's 12V or ground though.

 

This is an E38 ECM with 1 black and 1 gray connector. I think your referring to the older ECM with 1 red and 1 blue connector.

 

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"

 

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.

 

I am going for all out power. If its worth 5 hp to hook up a few wires, I will go ahead and do it.

I gotcha now, I was not aware that you could delete any code you want. I dont have a tuner, so my dyno guy will have to do that.

So will I still be able to do the relearn? Does the relearn really matter in my application?

 

Once you turn off the code, there will be no need to do the procedure.

 

So an E38 will do an "auto" CASE Learn? (for those of us without a BCM.....).

Is there a procedure to follow? Have seen one for a truck.

Thks

 

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.