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WARNING LIGHT FOR HYBRID BATTERY FAN FAILURE???

Discussion in 'Prius v Care, Maintenance and Troubleshooting' started by Eric "v", Jun 13, 2015.

  1. Eric "v"

    Eric "v" Member

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    Do we have a warning light for fan failure for the hybrid battery?

    This is crucial B/C a cooling fan failure here is death for the battery. An new battery is 'expensive as hell.
     
    #1 Eric "v", Jun 13, 2015
  2. PriusInParadise

    PriusInParadise Member

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    There is no separate light for the HV battery fan or a battery cooling system fault.
    All powertrain faults use the same Malfunction Indicator Lights / warning lights:
    Hybrid system warning light, the car with an exclamation point through it, and
    Check engine light, an engine with the word "Check" below it.
     
    #2 PriusInParadise, Jun 13, 2015
  3. bisco

    bisco cookie crumbler

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    and then you will have a trouble code logged with the detail. but there is no warning for a clogged fan, so i check mine once a month.
     
    #3 bisco, Jun 13, 2015
  4. Eric "v"

    Eric "v" Member

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    bisco,

    How do you check your fan for clogging? Is it very involved to get at it?

    I have a steering column-mounted ScanGuage II which weill tell me what engine code a "Check Engine" light is sending and then I refer to a printout from the dealer's service department to tell me what that code means.
     
    #4 Eric "v", Jun 17, 2015
  5. bisco

    bisco cookie crumbler

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    you can set your scan gauge to monitor your battery temp, i don't have one, but there are threads here. you can access the fan and vent tunnel through the rear when you take everything out to expose the battery. it's a one or two hour job. there's a youtube on the gen II, but the III is similar, and shouldn't be too difficult to figure out.
     
    #5 bisco, Jun 17, 2015
  6. Mendel Leisk

    Mendel Leisk Senior Member

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    Is the plug in battery actually a pair, big, accessible towards rear of hatch area? Reg Prius battery is single, smaller gerbil cage style, beside passenger side end of hybrid battery, takes some parts removal to access.
     
    #6 Mendel Leisk, Jun 17, 2015
  7. bisco

    bisco cookie crumbler

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    plug in must be more complicated with 2 inlets.
     
    #7 bisco, Jun 17, 2015
  8. Eric "v"

    Eric "v" Member

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    I see that there is a TSB on "clogged hybrid battery fan" so I'll check with my dealer on that one.

    Also I'll see if I can access my hybrid battery temps via my ScanGuage II. Thanks for that tip. I'm hoping I can so I can put in my default display to keep my eye on it. I'll ask my service dep't. for the hybrid battery "safe zone" temperature range so I know what I'm looking at on the ScanGuage II.
     
    #8 Eric "v", Jul 3, 2015
  9. Mendel Leisk

    Mendel Leisk Senior Member

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    There is an X-Gauge (ScanGauge add on) for each of the three hybrid battery sensors, on regular Prius. The middle (#2) sensor tends to run highest temp. There's another X-Gauge for fan speed. Hopefully works on v, or there's another that will.

    I found it a bit tricky adding X-Gauge. There's a decent YouTube on it, helps.

    The highest temps I've seen are around 46C, and fan speed 4 (out of 6 I think).

    I'd suggest a DIY dig down to your fan. It'll likely involve some pull up of the hatch floor, and removal of the inlet grill. Only do what you have to: if it's similar to reg Prius complete removal is no necessary for cleaning.
     
    #9 Mendel Leisk, Jul 3, 2015
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