P2609 trouble - Dodge Cummins Diesel Forum
2003/2004 General Discussion General Discussion for the Early (2003/2004) Common Rail No Advertising ...NO ADVERTISING

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post #1 of 71 (permalink) Old 08-05-2019, 01:17 AM Thread Starter
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P2609 trouble

Hello, iv made a post a few months ago and still havnt fix my problem, did all the test and everything pasted as it should, replaced new relays, check the fuseble link, changed gris heater gaskets, checks ohms and volts, jumeped relays they click and send power to heater grid, but still have the code P2609 and i have 30 days to smog my truck in Arizona and will not pass with a CEL

I saw a werid nut on the grounding wire for the heater grid doesnt look right and may be my problem also found out my OHMS on my IAT sensor are way over 100 OMHS witch is way to high from what iv been reading, i ordered a new IAT sensor from rock auto, i will upload photos of the grid heater nut, and if anyone can tell me its wrong and how to fix my problem that will be great!

Iv tried the 15omh resistor trick it didn't work, iv cracked the truck over many times with out waiting for the grid to cycle and the code wont go alway, my scanner will not Erase the code either

Iv came down to buying a EST CS2 tuner and the ground wire or the IAT sensor

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post #2 of 71 (permalink) Old 08-05-2019, 01:19 AM Thread Starter
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It will not let me upload a photo

But basically the nut that is on the stud for the grid heater is tighen on all the way down, the ground wire is on and then a another nut is on the top smashing the wire in between the two nuts, i do not think that's how its suppose to be and belive that its casuing it to be a open circuit
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post #3 of 71 (permalink) Old 08-05-2019, 01:52 AM Thread Starter
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I also notice dome corrosion on the bottom stud on the grid heater, no corrosion on the upper stud, can i move that ground wire to the upper stud? And ground it to the intake horn not the intake plenum
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post #4 of 71 (permalink) Old 08-05-2019, 03:30 PM
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Have you checked the fusable link that feeds both heavy duty relays .
Its one of the smaller wires that go straight to the battery term.

Connection quality
Corrosion
or open fusable link . IF its open , you can tug on it and its rubbery ( wire burned in half)

and no . that heater connection should be a lug , not wire smashed between 2 nuts

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post #5 of 71 (permalink) Old 08-06-2019, 12:18 AM Thread Starter
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Okay ill fux that ground tomorrow when i get off of work

Yeah i check the fuseble link, i made sure 12v is running though it and it has OHMS and Continuity as well
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post #6 of 71 (permalink) Old 08-06-2019, 08:28 AM
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Yeah , you def need to compair what you have to an oem known set up .

could be as simple as not connected right at the heater .

Caution should be used swapping stuff around though , its allot of current and a wrong connection will blow the FL or worse .

I guess there is the possibility of your heater being burnd out inside the plenum , but kind rare .

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post #7 of 71 (permalink) Old 08-06-2019, 08:11 PM Thread Starter
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Iv double checked all the ohms from the list the lasy person gave me on my last post everything was in line and worked as it should when it aas cold enough to use the grid, i just installed the new IAT sensor and my scanner says its reading 51 degrees with the new one and the old one. Maybe possibly that my ECM is going out or something becuase it was in the low 100's today when the truck was runnung, also have this stupid ABS light kept coming on for front driver side ABS sensor that i replaced when i did the hubs becuase it came on before, possibly a bad sensor on the hub
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post #8 of 71 (permalink) Old 08-06-2019, 11:04 PM Thread Starter
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Tonight i fixed that ground, i checked for ohms and everything is at 10omhs, i checked postive lead from relays to grid, postive lead to ground, fiseble link, ground to ground, ground to gaskets, gaskets to gaskets, i have 12v at relays maybe my grid is fried or this cummins has a ECM issue also replaced the IAT and its reading 51 degrees and its 104 right now
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post #9 of 71 (permalink) Old 08-06-2019, 11:06 PM Thread Starter
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I switched the ground post ( since there is two post ) it was on the lower ground, i moved it to the upper ground, am i suppose to have two differnt ground since there is two grounding post?
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post #10 of 71 (permalink) Old 08-07-2019, 12:41 AM
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No, not needed.
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post #11 of 71 (permalink) Old 08-07-2019, 12:48 AM Thread Starter
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Quote:
Originally Posted by tryNto View Post
No, not needed.

No two grounds are needed? Or?
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post #12 of 71 (permalink) Old 08-07-2019, 11:57 PM
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Quote:
Originally Posted by Ctp128 View Post
I switched the ground post ( since there is two post ) it was on the lower ground, i moved it to the upper ground, am i suppose to have two differnt ground since there is two grounding post?
Two different grounding posts but the same “ground”.
The chassis which is connected to the battery negative post is the ground.
You can connect x ground cables to x different points on the chassis, still the same one ground.

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