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Old 11-09-2010, 01:46 PM   #1
 
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93 Dakota codes, what does it mean?

Hey guys, I have a 93 Dakota with a 5.2L. It had kind of a miss sometimes so I replaced the original cap, rotor, plugs, and wires with new ones, and that helped a bit. It still had a miss and felt sluggish on take off once in a while, and last week it finally threw a code. I got 12 (memory standby power lost) and 27 (Injector output circuit not responding). I guess that 12 means the battery was disconected recently (which it has), but Im not entirely sure what 27 means. Is it just saying that theres a bad injector? I dont have too much experience with Chrysler codes.
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Old 11-09-2010, 06:47 PM   #2
 
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27 is indeed an injector code..thing that sucks about OBD1 (which your truck uses for codes) it will not tell you which injector..so check all the connectors and make sure everything is plugged in and tight

disconnect the battery for a little bit (reset) and then try it again if still nothing then start pulling injectors and checking them..make sure to releive the fuel pres before you do this since dodge trucks run 45psi in the rails.
12- the battery code will go away when the main fault codes have been fixed
and 55 is just end of code sequence
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Old 11-09-2010, 06:51 PM   #3
 
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I would ohm out the injector before pulling them. Meaning take a voltometer that has an ohms setting then hook the leads up to the two prongs (gotta disconnect the wiring from the injector). Don't disconnect the battery. The injector(s) that has the furthest off number is the bad one. they should all be pretty close to each other.
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Old 11-09-2010, 07:29 PM   #4
 
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Well I had some spare time at work today and started pulling the injector wires with the engine running. They all have +12v to them. Each one also made the engine miss when being unplugged and plugged back in, except for #5. Pulled the plug and its a dark brown color, compared to the others, which were an even white with a tan tip. I will ohm it out later tonight or tomorrow to make sure its the injector and not the computer.

Is it fairly common for the injectors to go out on these? The dealer said they like to fail at 100-120K+. Thats a little too soon for me.
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Old 11-10-2010, 07:11 AM   #5
 
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I had the same issue when I first got my truck. I got lucky and noticed that it was the wire harness going to one of the injectors was a lil frayed and losing connection. Have you tried cleaning the plug?
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Old 11-11-2010, 04:26 PM   #6
 
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I just got inside from ohming the injectors, I tested 2 working ones and got 15.8-9 on both, and then tested the bad one, and got the same reading. My boss said he has a tool that will actually test the injector that I will try tomorrow, otherwise I think Im looking at either a bad computer or wiring to the computer. Is there a place that will test the computers on these?
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Old 11-13-2010, 05:57 PM   #7
 
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Ok, I had some more time and this is what Ive figured out so far. I swapped the injector wires on #5 and #7, and the #5 injector started working and #7 stopped. So I know that all the injectors are good and that the problem follows the wire. Then I pulled the computer plug and did a continuity test from the injector to the computer pin, and the wire is good. Also put a noid light on the injector plug and I didnt get anything. So Im thinking my computer is just starting to fail? Ive heard its pretty common for Chrysler computers to fail. Is there a place like the dealer who can test them? Wheres the best place to get a new one?
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Old 11-14-2010, 09:37 AM   #8
 
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I don't know the 93's injection but most injector systems I've worked on need a ground to work. They are either grounded by another wire off the injector or the chassis of the injector. Did you check the grounds?
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Old 11-14-2010, 01:52 PM   #9
 
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I don't know the 93's injection but most injector systems I've worked on need a ground to work. They are either grounded by another wire off the injector or the chassis of the injector. Did you check the grounds?
This system has +12v on one side of the injector at all times (with key on). The other wire runs to the computer, which grounds out the wire to complete the circuit. Each injector has its own individual wire running to the computer, so its possible that the computer could fail individual injectors.

Basicly the computer controls the grounds.
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Old 11-14-2010, 04:53 PM   #10


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Hmm......check the plug going ito the computer.....could it be that this particular wire's connector has a little corrrosion on it?

I don't know too much about the computer systems unfortunately.....
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