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My pacifica obd says no power to tcm. Consistant. Car wont…

Customer Question
Good morning, my pacifica...

Good morning, my pacifica obd says no power to tcm.

Mechanic's Assistant: Is the power loss consistent, or does it fluctuate?

Consistant

Mechanic's Assistant: What year is your Pacifica?

Car wont start

Mechanic's Assistant: Are you fixing your Pacifica yourself? What have you tried so far?

Yes just got the car and hasnt been started yet , just ran obd

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

What is the power source or where does it come from

Submitted: 29 days ago.Category: Chrysler
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Answered in 6 hours by:
5/26/2018
Chrysler Mechanic: sprinkles08, ASE Certified Technician replied 28 days ago
sprinkles08
sprinkles08, ASE Certified Technician
Category: Chrysler
Satisfied Customers: 23,983
Experience: ASE Master & Advanced level certified, Chrysler Master Certified, Trans and Hybrid Specialist
Verified

Hello and welcome to JustAnswer! I apologize for the extended wait time you experienced, I've only just come online now and would like to assist you with your question.

I'm assuming that you're setting a fault code for lack of TCM communication. If it's an older vehicle with a standalone TCM then it could be the module itself or a wiring issue. If it's a newer vehicle with an NGC controller then odds are it will need a PCM.

What year is the car and what P code is setting?

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Customer reply replied 28 days ago
The fault is that i am not getting any power to TCM its a 2006
Chrysler Mechanic: sprinkles08, ASE Certified Technician replied 28 days ago

I need to know the P code number to proceed.

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Customer reply replied 28 days ago
Im sorry but it was my friends OBD that was used. He said no power to TCM. I have checked all fuses and relays, the fuel pump comes on, the ignition actuator is not broken, no security light on dash, but i do have check engine light on. The car won't start. I am really at a loss. Thank you for your prompt attention. Marilyn
Chrysler Mechanic: sprinkles08, ASE Certified Technician replied 28 days ago

Does the PRNDL display show the trans is in park?

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Customer reply replied 27 days ago
it does. What powers the TCM?
Chrysler Mechanic: sprinkles08, ASE Certified Technician replied 27 days ago

You don't have a separate TCM if the car is a 2006, it's part of the PCM. If the PRNDL display works then the TCM is operational.

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Customer reply replied 27 days ago
that means the tcm is not preventing the car from starting. I found that I have no ground to the transmission, would this prevent the car from starting? When checking the ignition actuator I found a hole cut into the transponder box exposing the chip that programs the igiyion to transponder like someone jumped the chip to get the pin code. Question is, if I have a key not programmed would the car start and die, or have an idicator on the dash light? When I unlock the driver door (I have no fob) the alarm sounds I have to put the key on the ignition and turn it to shut it off. Is this my problem? There was a recall in 2004-2006 on the pcm having to be reprogrammed. Tuesday I will call and see if mine was done.
Chrysler Mechanic: sprinkles08, ASE Certified Technician replied 27 days ago

Do you mean that the ground cable on the left of the trans is rotted off?

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Customer reply replied 26 days ago
No the ground has been found and in good condition. I am asking about how that engine would act if I had a key not programmed, or if 1 of the 3 grounds could prevent the car from starting so I can move forward. I need some suggestions of tests I can preform or you will have to come over for dinner and we can work on it together.
Chrysler Mechanic: sprinkles08, ASE Certified Technician replied 26 days ago

If the key failed the engine would start and die three times and lock the starter out. Is this what happened?

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Customer reply replied 26 days ago
No it just turns over, thank you for your promptness
Chrysler Mechanic: sprinkles08, ASE Certified Technician replied 26 days ago

You'll need to test for fuel pressure and spark then.

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Customer reply replied 26 days ago
Ok can you give me a location of a shrader valve and is multipoint spark test the same as throdle body
Chrysler Mechanic: sprinkles08, ASE Certified Technician replied 26 days ago

There isn't a port to connect to, a pressure gauge set with a T hose with it's own service port is used.

To check for spark you'd remove a coil, insert an adjustable spark tester set to 1/2" into it, and ground the alligator clip of the tester.

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Customer reply replied 26 days ago
Thank you I will get back to you. I feel comfortible ith you as my expert,
Chrysler Mechanic: sprinkles08, ASE Certified Technician replied 26 days ago

You're welcome.

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