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Code p216c, can I a wiring diagram for the ECU?

Tiny
SKRIPTIC_15
  • MEMBER
  • 2014 CHEVROLET CAMARO
  • 3.6L
  • V6
  • 2WD
  • AUTOMATIC
  • 123,690 MILES
Misfire on cylinder 5. Dtc code p216c is for fuel injector 5 circuit high. I replaced the fuel injectors and still get the same code. I need the wiring diagram for the ECU to test ohms of each injector circuit as well as continuity between the ECU connector and injector connector.
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Wednesday, August 16th, 2023 AT 5:10 PM

8 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,700 POSTS
Hi,

To get you started, the code is specific to a short to power for the number five injector. I thought that might make it easier for you. (See pic 1)

Now, I attached the wiring to injector 5 from the PCM below (pics 2 and 3). Additionally, I attached a connector pinout for the same injector. (Pic 4, 5, 6)

Let me know if this is what you needed, or if you have other questions.

Take care,

Joe

See pics below.
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Wednesday, August 16th, 2023 AT 10:45 PM
Tiny
SKRIPTIC_15
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Could this short be caused by the ECM? Thank you for the diagrams.
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Wednesday, August 16th, 2023 AT 10:47 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,700 POSTS
Hi,

It could, but chances are it is either wiring-related or connector related. Check to see if there is constant power or ground at the injector connector. If there is, then make the same check at the PCM itself. Note that the pins are small at the PCM, so it is possible one is damaged or making contact with another.

Let me know what you find. I'm interested in knowing.

Take care,

joe
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Wednesday, August 16th, 2023 AT 11:29 PM
Tiny
SKRIPTIC_15
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  • 4 POSTS
I checked the ohms to each injector from the ECM connector to see if there is more resistance in an injector than the other injectors and all injectors through the harness are at 2.2-2.4 ohms. So, I don’t believe it is the injectors themselves rather than something internally damaged in the ECM.
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Wednesday, August 16th, 2023 AT 11:32 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,700 POSTS
Hi,

Chances are you're correct. However, make sure to check connector pins at the PCM to make sure none are corroded, damaged, or pushed inward.

Let me know.

Joe
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Thursday, August 17th, 2023 AT 6:19 PM
Tiny
SKRIPTIC_15
  • MEMBER
  • 4 POSTS
Finally have some good news. Friday, I ended up taking the Camaro to the dealership. Due to me thinking it was the ECM being bad but turns out that the alternator that I had just put on about a month ago had a bad voltage regulator and was causing all of my issues.
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Sunday, September 3rd, 2023 AT 2:56 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,700 POSTS
Hi,

Thanks for the update. Wow, I wouldn't have suspected the alternator would cause a cylinder 5 misfire (injector). However, anything is possible. LOL

Regardless, I'm glad to know you found the problem and it has been resolved.

Take care of yourself and feel free to come back anytime in the future.

Joe
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Sunday, September 3rd, 2023 AT 9:24 PM
Tiny
JR7305
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Interesting wonder how they came to the conclusion it was the alternator?
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Saturday, December 16th, 2023 AT 1:20 AM

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