2016 Chevrolet Malibu 2.5L LCV Known Good CKP vs CMP Waveforms

Automotive Owner California Posted   Latest  
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Driveability
Propulsion
2016 Chevrolet Malibu Limited LTZ 2.5L (A LCV) 6-spd (6T40) — 1G11E5SA8GU156663
Cam
Crank
Known Good
Waveforms

Known good waveforms - CKP vs CMPi vs CMPe 2016 Chevrolet Malibu 2.5 LCV engine.

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Azael Diagnostician
Texas
Azael Default
 

on the crank sensor you were just hooked up on the crank signal volts DC ?

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Tim Curriculum Developer
California
Tim Default
 

Yes. I assume you're asking because your test results are different?

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Azael Diagnostician
Texas
Azael Default
 

Yes. I just worked on a 2015 Malibu that came from another shop that replaced the engine. I got cam signals but no crank. so I went to the crank sensor checked powers and grounds. both 5v and signal wire have 5 volts and good ground. So I pulled the sensor out and waved it on a bolt but didn‘t get any activity on the signal wire. So i found out the cam sensor was the same connector as the crank…

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Tim Curriculum Developer
California
Tim Default
 

Hmm. Even though GM's description of all sensors is identical, it's possible they have different sensitivity (or the CKP is really ‘MR’ and may need a more complex trigger). Your cam sensor/crank connector trick has proven that all circuits are capable of functioning as designed, and your repeated use of OE sensors has all but proven it's not a bad sensor. Therefore, and since nothing else makes…

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