Question about 2004 Dodge Ram 2500

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HOW OR WHERE DOES THE PCM READ THE VIN FROM - 2004 Dodge Ram 2500

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It's internal to the PCM (In the flash memory)

Posted on Apr 14, 2015

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I just put in a PCM on a 98 Dodge Dakota how to start run for 3 seconds and cut off what could be my problem


I am assuming you installed a used or junkyard PCM into the vehicle. You are probably experiencing issues from a misprogrammed unit. Each PCM is programmed to the VIN-specific installed components of the vehicle. For example, my 1999 Dakota did not come with a factory anti-theft system installed. If I change PCMs to one that does, it will do exactly what yours is doing since there is nothing installed to tell the PCM that the anti-theft system is working. Many shops and most dealers can reprogram these units. They use the VIN from the vehicle and download the programming from the manufacturer and flash the PCM. Most DIYers do not have the equipment nor the subscription(s) to the manufacturers to get this data.

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PCMs are matched to a series of VIN numbers Take your VIN number with you. most junk yards will know how to find a match. You can order online.

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How to reprogram pcm concorde 2000 by my self


The PCM is VIN specific so unless you have a Chrysler Star Scan tool and the VIN codes, there is no way for you to do this. Take it to a dealer.

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Chrysler sebring code p0513


P0513 stands for invalid SKIM Key. Basically it means that the "computer chip" that is in your ignition key which has a special code is not recognized by your vehcile compter (PCM). In most cases that I have come across is that either your VIN is not entered or is the incorrect VIN programmed into the PCM. Have you recently changed the PCM ? You may try another ignition key but I doubt that would work unless you are using the wrong key for the vehicle. You will need special diagnostic computer programs in order to correct this problem. Most likely your PCM will need to be "Flashed" to the VIN. This really isn't a weekend/backyard/part time mechanic fix. Hope this helps you to understand what the code is and what it means. Guessing the vehicle won't start.....

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1998 ECM Engine Control Module, also known as the computer.
Rebuilder's part number
Part Number: 2798-07077942

OEMEngine Emission/TransmissionYearSub Model RemarksPriceCore Action590-04207 V8-4.6 Either/AT/MT 1999 ALL SUB-MODELS 8-279, 4.6L, VIN Y, VIN 9, PCM $225.00 $50.00 buy.gif590-04207 V8-4.6 Either/AT/MT 1998 ALL SUB-MODELS 8-279, 4.6L, VIN Y, VIN 9, PCM $0.00 $0.00 buy.gif590-04207 V8-4.6 Either/AT/MT 1997 ALL SUB-MODELS 8-279, 4.6L, VIN Y, VIN 9, PCM $0.00 $0.00

http://www.ecmdepot.com/

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1 Answer

P0702 p1685 fault code on 2.7crd merc transmission


DTC P0702 - Transmission Control System Electrical
There is a code in the ****** control module and need to check harnesses and wiring, as first step.

DTC P1685 - Skim Invalid Key
Transponder ID (in ignition key) is monitored with ignition on. DTC will set if transponder ID read by Smart Key Immobilizer Module (SKIM) does not match any transponder ID's stored in SKIM memory. Possible Causes:
- Incorrect VIN In PCM
- Invalid SKIM Key Present
- No Communication With SKIM
- No VIN Programmed In The PCM
- PCM SKIM Trouble Codes Set

I would suggest clearing all these codes, and drive it until the problem arises again, or the check engine light comes on, and then check for codes again. To clear the codes you will need to remove the negative battery cable, and touch it to the positive cable, for about 15 seconds. Then re hook and all the modules will be reset. If this isnt work, visit your Trans Service.

Hope this helps; also keep in mind that your feedback is important and I'll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using Fixya, and have a nice day.

Oct 27, 2011 | 2002 Jeep Grand Cherokee

1 Answer

I installed a new pcm into my 2002 chevy cavalier and it will not start. What is wrong?


When you purchased the new PCM did you or was it "flashed" to your VIN (vehicle identification number) If it was used or the new one was not flashed to your VIN it will not work for your vehicle until it is. I hope this helps and good luck.

Aug 01, 2011 | Chevrolet Cavalier Cars & Trucks

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If I replaced the PCM on the 2005 dodge ram truck would I have to reprogram the keys to make the truck run?


If you key has a chip in it, you will probably have to get your ECM reprogrammed with the proper VIN, since it no longer matches the original VIN on your Vehicle. I don't think the dealer would program your keys to a mismatched VIN number, so more than likely you will need your ECM reprogrammed with the proper VIN. This will need to be taken to the Dodge Dealership to be fixed.

Mar 14, 2011 | 2005 Dodge Ram 1500

1 Answer

Error code 1680


Chevrolet OBD Fault Codes
DTC P1680 - Driver 5 (ECU malfunction)

This is any internal ECU problem (ECU = ECM = PCM device); check other details HERE; keep in mind that its possible that you have to reprogramm the ECU.

Here is a bulletin for this problem.Subject: Service Engine Soon Light On, P1680 (Reprogram or Replace PCM)

Models:
2004 Buick Rainier
2004 Chevrolet Trailblazer
2004 GMC Envoy
2004 Oldsmobile Bravada with 4.2L Engine (VIN S - RPO LL8)

Some customers may comment on the Service Engine Soon Light coming on. Upon investigation, the technician may find a P1680 diagnostic trouble code Check the resistance of the accelerator pedal position sensors using the procedure in the appropriate Service Information for DTC P1680.

If the resistance of the accelerator pedal position sensor is within the specifications shown in the Service Information and the vehicle was built prior to the following VIN breakpoints, then reprogram the PCM with the latest calibration.

If the resistance of the accelerator pedal position sensor is within the specifications shown in the Service Information and the vehicle was built after the following VIN breakpoints, then replace the PCM. If the resistance of the accelerator pedal position sensor is outside the specifications shown in the Service Information, then continue with the diagnostics for DTC P1680.

VIN Breakpoints
• Vehicles built at Oklahoma City Assembly Plant - 46192755
• Vehicles built at Moraine Assembly Plant - 42315833

Hope this help

Aug 03, 2010 | 2004 Chevrolet TrailBlazer

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