Crank Position Sensor relearn procedure
Thread Starter
Intermediate
Joined: Jan 2021
Posts: 47
Likes: 9
From: Irvine, CA
Crank Position Sensor relearn procedure
I've replaced the ECU in my 2002 Corvette Z06 and I need to run the CPK relearn routine. I have a Foxwell NT510 Elite scan tool to run the procedure. When I attempt to run the routine, the scan tool typically freezes forever at a "loading data" screen. I've attempted the procedure maybe two dozen times and only once did it get by the loading data screen to attempt to run the procedure and failed. I've followed the preparatory instructions exactly (engine is at temp, wheels blocked, parking brake on, AC off, etc.) I'm curious if anyone else has come across this problem and has any suggestions to complete the procedure. Alternatively, I'm wondering if anyone has a recommendation for a scan tool that they've used successfully (e.g., GM TECH2) Thanks.
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Joined: Sep 2013
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From: Cape Coral, Florida
I've replaced the ECU in my 2002 Corvette Z06 and I need to run the CPK relearn routine. I have a Foxwell NT510 Elite scan tool to run the procedure. When I attempt to run the routine, the scan tool typically freezes forever at a "loading data" screen. I've attempted the procedure maybe two dozen times and only once did it get by the loading data screen to attempt to run the procedure and failed. I've followed the preparatory instructions exactly (engine is at temp, wheels blocked, parking brake on, AC off, etc.) I'm curious if anyone else has come across this problem and has any suggestions to complete the procedure. Alternatively, I'm wondering if anyone has a recommendation for a scan tool that they've used successfully (e.g., GM TECH2) Thanks.
Last edited by C5 Diag; Nov 4, 2021 at 01:23 PM.
Thread Starter
Intermediate
Joined: Jan 2021
Posts: 47
Likes: 9
From: Irvine, CA
On most attempts, I don’t even get to that point of the procedure. The scanner says that it can’t communicate or hangs at the loading data screen. The one time that I did get to the point where it asked me to accelerate to WOT, I did not continue to hold the brake pedal. The instructions on the scanner aren’t really clear on that point, so thanks for the recommendation.
Thread Starter
Intermediate
Joined: Jan 2021
Posts: 47
Likes: 9
From: Irvine, CA
The strange thing is that it communicates with other modules to even get into the "special function" feature for the PCM. It connects, scans the VIN, opens the PCM module. It's only when it's trying to run the CPS learn feature that it complains about lost communication. I'm thinking of trying another scanner/cable to validate whether it's the scanner or the car itself.
Thread Starter
Intermediate
Joined: Jan 2021
Posts: 47
Likes: 9
From: Irvine, CA
The strange thing is that it communicates with other modules to even get into the "special function" feature for the PCM. It connects, scans the VIN, opens the PCM module. It's only when it's trying to run the CPS learn feature that it complains about lost communication. I'm thinking of trying another scanner/cable to validate whether it's the scanner or the car itself.
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Moderator, Tech Contributor
Joined: Sep 2013
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From: Cape Coral, Florida
No, the CKP Relearn is for misfire monitoring and for "resyncing" of the CKP sensor to the crankshaft
Last edited by C5 Diag; Nov 7, 2021 at 12:36 PM.