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help code P1689

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  #1  
Old 12-31-2008, 11:24 AM
jtbrian jtbrian is offline
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Question help code P1689

Hi new to this site have a question;
I have a 99 Dodge Ram 2500 24V with auto, and am getting a code of P1689 and only that code. The truck will shut down going down the road, or sometimes the code will appear before I start the truck. Took the truck in and had a new VP44 and tranfer pump put in drove down the road a few miles and it did the same thing, took it back so they said it was the APPS so had a new one of those put on. No luck still getting the 1689 code.
What to do?? Tired of throwing money at the truck.
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  #2  
Old 12-31-2008, 10:10 PM
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HellaciousHemi HellaciousHemi is offline
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Could it be a camshaft position sensor? or crankshaft position sensor? If this mill has these sensors, I would look at those. But I haven't work on one of these before so I am not sure about it. Check for any loose, worn connections or corroded connections.

I dont know what code P1689 exactly is but I do know it is a Specific Chrysler/Dodge code.
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Old 01-01-2009, 10:51 PM
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P-1689 no communication between ecm & injection
pump module (obd ii)

possible causes
fuel inj pump gnd ckt open or high resistance
fuel pump ctrl mod harness observable defect
datalink (+) circuit open
datalink (+) circuit short to ground
datalink (-) circuit open
datalink (-) circuit short to ground
engine control module defective
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Old 01-02-2009, 12:13 PM
jtbrian jtbrian is offline
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Thank you for info, now thats helpful. do you recomend checking for these posible causes for myself, if so, is there a wiring digram available, or do I have to go to shop to see a tech.
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Old 01-02-2009, 01:54 PM
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I would start with disconnecting the batteries and then clean battery post, then move on to the cables. Clean the cables well bothe ends clean the area where the negatives contact the "grounding" area. After cleaning the battery posts, cables and contact areas spray on some terminal coating.
try this see if this makes a difference, been a number of guys having like issues and had the problems go away after cleaning up the connections.
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Old 01-02-2009, 02:06 PM
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I will try that also, but I do clean my batt. conections once a year and use terminal coating so that I would never have a starting problem.
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Old 01-02-2009, 02:32 PM
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follow the "ground" cables to where they terminate clean those areas as well, also check all gorunds to ie: fenders make sure area are clean and the grounds are tight.

hope this helps
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Old 01-02-2009, 02:43 PM
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thanks.. Will go out and do that today. Hope it cures the problem.
Why couldn't the shop have done that first, instead of taking all my money?
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Old 01-02-2009, 04:06 PM
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OK> cleaned the negetive battery conection at the front of the block, also the one on the pass. side of block, cleaned both batt. terminals and all neg. conections to fenders and under hood area I could find. Also this is somthing that HELLACIOUSHEMI had sugested so thanks to all for the info.
Will see if it works...

Last edited by jtbrian; 01-02-2009 at 04:12 PM..
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Old 01-02-2009, 05:55 PM
westwoodspeedster westwoodspeedster is offline
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Keep us updated what you find. Mine is doing the same thing. I called bluechip the other day, he told me the electronics on the vp44 were going bad. I just need to come up with the extra$$$ to see if he was right
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Old 01-02-2009, 09:33 PM
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Nope!!
No luck, drove into town drove fine, came back out of the store and turned the key on and the "check engine light" wouldn't go off so I checked with code reader and same code P1689. Cleared codes drove home did fine.
Still don't know, if there is any more sugestions please feel free
Thanks (MORE MONEY I guess!!!)
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Old 01-05-2009, 12:43 PM
westwoodspeedster westwoodspeedster is offline
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Well i just orderd a vp44 hope its the problem, if not ahh.. i supose it aint gonna hurt nothen but the wallet. Ill let ya know how it turns out in a couple days
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Old 01-07-2009, 06:33 PM
jtbrian jtbrian is offline
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Could my edge product cause the symtems that I have described ( code P1689)?
If so how do you remove the system correctly?
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  #14  
Old 01-14-2009, 02:55 PM
westwoodspeedster westwoodspeedster is offline
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My truck did the same thing. replaced the injection pump the other day.. no more problems for 3 days now YAY!! wallets allitle lighter too!!
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Old 01-14-2009, 11:33 PM
jtbrian jtbrian is offline
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That is great!
Did your truck also only have the one code P1689.
When I had my injection pump replaced it still did the same thing.
Hope I don't have to replace it again..........
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  #16  
Old 01-15-2009, 05:34 PM
westwoodspeedster westwoodspeedster is offline
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My truck had the 1689 and 1693 witch im told is just saying the 1689 exist in the computer and is nothin to pay attention to.
I replaced both my lift and injection pump. just went with the ddrp fass pump and stocker injection. When i orderd the pump i made sure it came with a new upgraded ecm. some places i called just left the old one on and shipped it out. kinda if it didnt need replaced why fix it mato. hope you get it runnen hate to pass a fellow cummins
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  #17  
Old 01-21-2009, 11:54 PM
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It has been a few days, how is your truck doing after the new pump?
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  #18  
Old 03-09-2013, 09:35 AM
CRosner CRosner is offline
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I just changed my vp44 and my truck has this code still
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Old 03-11-2013, 12:23 PM
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have you cleared the code?

also you did not put in a used vp44 did you?
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Old 08-15-2013, 02:02 PM
Tcwbillmorgan Tcwbillmorgan is offline
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Dealing with the same issue truck has 79,000 miles all the grounds are good I checked the wires between the injection pump and ecm all ohm'd out fine. The thing that helped the most is I hooked up the cummins go no go box to the injection pump before I went and spent the money on the pump and it tested out fine. The issue was a bad ecm what can kill the ecm is if you arc'd a battery cable or if you have ac voltage "mine was a battery cable" ac voltage coming from your alternator my ac voltage was .01 if it is higher than .1 you have a bad alternator,ecm and just hope it didn't get the computer on the vp44. This can be tested by placing a volt meter on the driver side or passenger side battery start the truck check for DC voltage and make sure it's charging then turn your volt meter to ac voltage still hooked to the battery. This will tell you if you have ac voltage feeding back.
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Old 08-15-2013, 02:02 PM
 
 
 
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Tags
1689, 3500, 99, camshaft, code, communication, cummins, diesel, dodge, ecm, injection, module, p1689, position, pump, sensor, sprinter

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