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Low voltage to traction battery relays. (11.2) , inverter pump doesn't run

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by tallman, Jan 18, 2020.

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  1. tallman

    tallman Junior Member

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    They couldn't verify any damage , just said they saw droppings

    Posted via the PriusChat mobile app.
     
    #41 tallman, Jan 23, 2020
  2. SFO

    SFO Senior Member

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    Don't know anything about that scanner, maybe someone else does and can chime in.

    See if that "snap-on ultra scanner" has the secondary codes (INFs), as a bunch of your listed DTCs have related INFs.
     
    #42 SFO, Jan 23, 2020
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  3. TMR-JWAP

    TMR-JWAP Senior Member

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    I'll mention it again

    A 10.5 amp continuous draw from the 12v system is not normal. That completely explains why there is 12.x at the battery terminals, but not at the rest of the system. Try removing the ABS relays in the underhood fusebox and see if that draw goes away.
     
    #43 TMR-JWAP, Jan 24, 2020
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  4. tallman

    tallman Junior Member

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    Appreciating you guys help with this
    Posted via the PriusChat mobile app.
     
    #44 tallman, Jan 24, 2020
  5. tallman

    tallman Junior Member

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    #45 tallman, Jan 24, 2020
  6. tallman

    tallman Junior Member

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    Don't think I mentioned this Toyota shop that checked this out left the inverter pump unplugged at the pump, I plugged it in it makes a noise like it's running but no action in the resivoir

    Posted via the PriusChat mobile app.
     
    #46 tallman, Jan 25, 2020
  7. bisco

    bisco cookie crumbler

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    hmm, sounds okay then
     
    #47 bisco, Jan 25, 2020
  8. tallman

    tallman Junior Member

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    Getting close to the problem I think, I have power going to the hv battery s relays with a volmeter 11.96 with button pushed, when I touch a test light to the same place I'm getting the 11.96 it drops to about 1.9 volts, does this power come from a relay or switch up front? , I did run another ground from the battery ground , no change
    Posted via the PriusChat mobile app.
     
    #48 tallman, Jan 25, 2020
  9. bisco

    bisco cookie crumbler

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    Not sure, I don’t have a schematic handy
     
    #49 bisco, Jan 25, 2020
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  10. tallman

    tallman Junior Member

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    Additional codes IMG_20200126_120646.jpeg

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    #50 tallman, Jan 26, 2020
  11. bisco

    bisco cookie crumbler

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    those can be looked up and troubleshot in the service manual
     
    #51 bisco, Jan 26, 2020
  12. dolj

    dolj Senior Member

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    The P0A0D tells you you have not installed the safety interlock correctly, or the wire that goes from the switch at the bottom of the interlock is not connected.

    Prius safety Interlock.jpg
     
    #52 dolj, Jan 26, 2020
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  13. tallman

    tallman Junior Member

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    Checked interlock visual and with ohm meter, it's good

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    #53 tallman, Jan 26, 2020
  14. tallman

    tallman Junior Member

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    Probably going to take apart interior and look for rodent damage , Toyota shop said they found rodent droppings

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    #54 tallman, Jan 26, 2020
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  15. bisco

    bisco cookie crumbler

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    that sounds like a good idea. where's the main wiring harness, inside or out?
     
    #55 bisco, Jan 26, 2020
  16. dolj

    dolj Senior Member

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    It doesn't mean the plug is bad, it is not inserted correctly. Did you do all three steps as per the diagram in post #52? If so, the car does not detect it and warrants further investigation.
     
    #56 dolj, Jan 26, 2020
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  17. TMR-JWAP

    TMR-JWAP Senior Member

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    There is a wire connector just to the rear of the HV Battery cooling fan that frequently has significant corrosion issues. If you remove the passenger side trunk trim panel to expose the cooling fan, I'm sure you'll see the connector I'm talking about. I've removed the connector in a couple cars and just spliced the wires to their counterparts. The connector in the below photos was one of the better ones I've seen.

    Connector by fan 1.JPG Connector by fan 2.JPG
     
    #57 TMR-JWAP, Jan 26, 2020
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  18. tallman

    tallman Junior Member

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    Looks to be under the plastic inside

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    #58 tallman, Jan 26, 2020
  19. tallman

    tallman Junior Member

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    Yes did all three, and then took small white connector apart and checked for continuity from Safety switch it checked good so trouble may be farther forward

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    #59 tallman, Jan 26, 2020
  20. tallman

    tallman Junior Member

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    Also will take other side apart check connection s and clean fan

    Posted via the PriusChat mobile app.
     
    #60 tallman, Jan 26, 2020
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