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C0055 Rear Wheel Speed Sensor Circuit? Wiring diagram?

Deathdog
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Deathdog Enthusiast

Deathdog

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I have a speed sensor on the transfer case. Is that the one C0055 references? Does anyone know where I can look at a wiring diagram? The speed sensor and the O2 wires seem shorted or?

Deathdog Enthusiast

Deathdog

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While inspecting wiring I noticed there appears to be a speed sensor on the other side (passenger) of the transfer case? 2005 Sierra 4WD CrewCab. 

newdude Senior Enthusiast

newdude

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Not sure why you made a seperate thread on this?  You had the transfer case encoder and then this issue started right?

 

I had posted a response in there but didn't get any sort of reply.  Couple important questions I asked in there.

 

 

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Deathdog Enthusiast

Deathdog

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10 hours ago, newdude said:

Not sure why you made a seperate thread on this?  You had the transfer case encoder and then this issue started right?

 

I had posted a response in there but didn't get any sort of reply.  Couple important questions I asked in there.

 

Yes, it is indexed correctly. It won't go on any other way. The 4WD works fine. I guess I overlooked the "2 sensors" in your post. I have NP8. It seems unusual the both sensors just went bad at the same time?

 

swathdiver Senior Enthusiast

swathdiver

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Mitchell and AllDataDIY have subscription based shop manuals with the wiring diagrams, trouble shooting, etc.  You can get a one month at AllData.  It's my go to always.

Deathdog Enthusiast

Deathdog

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8 hours ago, swathdiver said:

Mitchell and AllDataDIY have subscription based shop manuals with the wiring diagrams, trouble shooting, etc.  You can get a one month at AllData.  It's my go to always.

Ya, AllData is $190 for one month. The reason I’m on the forum is to avoid that. Thanks though!

txab Senior Enthusiast

txab

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8 minutes ago, Deathdog said:

Ya, AllData is $190 for one month. The reason I’m on the forum is to avoid that. Thanks though!

Look into alldatadiy.com/

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Deathdog Enthusiast

Deathdog

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I signed up Alldatadiy for a month. It's per car, so. It does have a test procedure. It's very vague but I'll try it tomorrow.

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Deathdog Enthusiast

Deathdog

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On 6/18/2023 at 11:33 AM, Deathdog said:

 

There is a third sensor above the front driveshaft. Wire colors are Yellow and Purple. The wires to the passenger side are Blue and Green. I believe these to be the ones the wiring diagram refers to. Neither one has voltage at the sensor. Will someone look at step 3 of the test procedure? Am I misinterpreting this? If I disconnect the EBCM there would certainly be no voltage at the sensor. I'm unplugging the sensor and testing there with EBCM connected. Am I missing something?C0055 (ALL Diagnostic Trouble Codes ( DTC )) - ALLDATA diy.pdf 

NVG 246-NP8 Transfer Case (Transfer Case) - ALLDATA diy.pdf

Deathdog Enthusiast

Deathdog

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It turns out, there is no voltage at the sensor as step 3 implies. The sensor furthest to the front was unplugged. It was plugged in at the sensor but about 18" forward of the sensor there is a connector on top of the transmission tale. It was unplugged. I plugged it in and everything was fixed. When I bought the pickup The "Service 4WD" was on. I replaced the Transfer Case Encoder Motor because it had a wires that had been cut. Connecting the wires may have fixed it. I just bought a new one. 4WD works and speedo/tranny work. It turns out if you cut the Encoder Motor wires and unplug the Front Axel Actuator, you don't need the front sensor. Thanks for all the support!

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