P1389 and the ASD relay is working?

Discussion in 'Dodge 4x4' started by Activate, Jun 18, 2010.

  1. Activate

    Activate New Member

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    My Ram 1500 wont start .

    I have checked the codes and it it trowing P1389 it is the ASD relay.

    I have checked the relay under the hood and the relay is working fine?

    What can it be?

    Thanks and greetings,


    Erik
     
  2. Moparsrtboy

    Moparsrtboy New Member

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    have you checked to see if you have fuel and spark? thats what the asd controls, i would check these items first.
     

  3. JackedUp

    JackedUp Well-Known Member

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    How did you test the relay? Did you swap it with another one? There are two 1389 codes. A regular one and a M one. A lot of the time it the CPS.
    Does it crank but not start, or totally dead?
     
  4. Activate

    Activate New Member

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    When I switch the key to the crank posititon the relay is clicking, I have changed it with another relay from the horn and still not working.

    ALso changed the the ECu but no luck.

    It cranks but wont start.

    Thanks and greetings,

    Erik
     
  5. JackedUp

    JackedUp Well-Known Member

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    If it cranks but won't start and that code, I'm saying CPS def.
     
  6. Activate

    Activate New Member

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    I have an OBDII scanner on my laptop, can I check the CPS signal?

    Is the tachometer powerd by the CPS because I have a signal on the tach?

    Thanks and greetings,


    Erik.
     
  7. JackedUp

    JackedUp Well-Known Member

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    I do not know if you can check it with the OBD2 scanner. I have always done it ruling everything I can think of out, then replacing it if nothing else works.
    Making sure all the wires are good to the battery, starter and alternator.
    Make sure you have spark.
    Unplugging the CPS and seeing if you're voltage meter or fuel meter work properly (if you have voltage that is) If they both work correctly, then the CPS is bad.
    You can also rule out the NSS but moving the shifter up and down, trying to start in N, the NSS can mask the CPS and code sometimes.

    Has your truck overheated at all lately? that's the biggest reason for a failed CPS.
    That's all I can think of off the top of my head. It's hard to diagnois through a computer. :dunno: