Transmission wiring schematic needed

JOSE RIVERA2

MEMBER
2014 JEEP GRAND CHEROKEE
3.6L
6 CYL
4WD
AUTOMATIC
120 MILES

My 2014 Grand Cherokee Summit hasn't started for two weeks, and when I press the start button, the dashboard won't turn off. I think the transmission is disconnected or has an open circuit. Does anyone have a wiring diagram? It displays messages such as: (Vehicle Not in Park) (Until You Reach a Desired Location You May Not Be Able to Shift Again Until Serviced.) (Service Transmission Continue in D. Do Not Shift or Turn Engine Off)

Thursday, April 10th, 2025 AT 4:57 AM

5 Replies

KEN L

MASTER CERTIFIED MECHANIC
51,257 POSTS

I would run the codes to help see what is going on and which codes are stored.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

and here is a guide to help you test the wiring with the transmissions wiring diagrams as requested.

https://www.2carpros.com/articles/how-to-check-wiring

I can tell you I have seen the shift lever sensor go out and cause this kind of issue. Check out the images (below). Please let us know what happens.

Images (Click to make bigger)

Was this

answer

helpful?

Yes

Monday, April 14th, 2025 AT 11:23 AM

JOSE RIVERA2

MEMBER
3 POSTS

Hi, Ken L.
I have no power at pin #9, the pink wire with the white tracer (IGN OFF/RUN/STRT). I don't know where this wire ends because once it reaches the transmission it splits (Y) in the other direction. I don't know where to look, much less what to do. All the fuses and relays are fine. CODE = P1DCA / CODE = U0101

Image (Click to make bigger)

Was this

answer

helpful?

Yes

Sunday, April 20th, 2025 AT 12:07 PM

KEN L

MASTER CERTIFIED MECHANIC
51,257 POSTS

That wire goes to the BCM, but this is a signal wire that tells the module the car has been turned off so it might not have power or ground when testing.

Code P1DCA - Torque Request Signal from TCM Denied

Code U0101 - Lost Communication with TCM (Transmission Control Module)

So it looks like you might have a bad TCM which is the valve body. I would remove it and get a rebuilt unit. Let us know how it goes

Was this

answer

helpful?

Yes

Monday, April 21st, 2025 AT 9:47 AM

JOSE RIVERA2

MEMBER
3 POSTS

I can find someone who can program the TCM. But I need to know how to replace the TCM and the valve body that connects it. The question is, do you know of any videos that show me how to replace it? Thank you in advance for your time and patience.

Was this

answer

helpful?

Yes

Monday, May 5th, 2025 AT 5:06 PM

KEN L

MASTER CERTIFIED MECHANIC
51,257 POSTS

Sure, here is how to change out the valve body and TCM which is a common failure in these cars. Check out the images (below). Let us know what you find.

Images (Click to make bigger)