P3006 and won't start

Discussion in 'Generation 1 Prius Discussion' started by rharashi, Jun 3, 2016.

  1. rharashi

    rharashi New Member

    Jun 3, 2016
    2002 Prius
    Hello everyone. I just purchased a 2002 Prius from a government auction. The car had to be jump started at the auction yard. It ran for awhile and then died before I could put it on the dolly. I jumped it again, load it and towed it home. When I got home I jumped it and drove it off. I tried to charge the 12V battery on a 2 amp current, but it wouldn't charge so I replaced it with a new battery. Now the car won't start at all. Don't worry, I did not reverse polarity at anytime. Here's what is happening now:

    1. It never does reach a Ready state. Instead, the screen turns on and shows the Main Battery warning and sometimes the one to the right of it that looks like a car with an exclamation point through it.
    2. I plugged a cheap code reader into it and it gave me two codes: P3006 and P3006 P.
    3. I cleared the codes with the reader and the screen immediately says Problem Solved, but then the Main Battery warning comes up again.
    4. I took the back seat out to access the terminals to the HV battery. I checked these with a multi-meter both with the key off and then on. They read 0V. The meter is working because it reads the 12V voltage fine.
    5. I checked resistance on all of the fuses in the three compartments under the hood and to left of the steering wheel and they all seem fine, so I don't think any of the fuses are blown.
    6. The orange colored safety shutoff thing on the back driver's side of the HV pack seem to be properly installed.

    Here are my questions:
    1. Are the two leads on the drivers side front of the HV battery both positive or is one negative?
    2. Should there be voltage at these terminals and, if so, what should it be?
    3. Is there a fuse or relay inside the HV battery that is supposed to turn voltage on from the HV pack when the key is turned on?
    4. If one of the cells goes completely bad inside the pack will it cause an open circuit that would cause the pack to read 0V?
    5. Is it correct to assume that if the Prius computer senses something wrong with the voltage supplied by the HV battery that it won't even try to fire the gas engine?

    Thank you so much for any help. This is actually a present for my dad that I'm hoping to give him on Father's day so it would be great to be able to diagnose and fix it by then.
  2. ericbecky

    ericbecky Hybrid Battery Hero

    Mar 12, 2004
    Madison, Wisconsin
    2005 Prius
    1. one is positive one is negative.
    2. On those exposed terminals, there should be voltage when the car is on. DANGEROUSLY HIGH VOLTAGE! Do yourself a favor and buy some high voltage gloves off of amazon. Cheap life insurance. Even with the car off you could remove the plastic safety covers and check voltage on the battery side of the contactor.
    3. There are relays that will connect when 12 is applied to them. even in ACC mode.
    4. You should still read some voltage at the terminals.
    5. correct

    Are you sure the orange plug is in place on the battery?
    What model voltmeter are you using? Are you familiar enough with its operation to measure HV DC?
    You may need to charge up the HV battery. Either do it module by module with a low voltage charger (38 modules) or buy a HV pack charger and do it all in one shot overnight.
  3. DRACO

    DRACO Member

    Nov 28, 2015
    Rancho Palos Verdes, California
    2002 Prius
    Where in Cali are you?

    You really need or borrow a Mini-vci with TIS ( Prius Aware Code Reader ) to properly diagnose the HV battery's state.

    You most likely than not have dead cells and or damaged terminal strips/sensors due to corrosion or worse fractures.

    Check my sticky above in Gen1 sub group to get an idea of what to expect if you decide to tackle this project. Scary at first but not too difficult, just be safe, you are risking HIGH Voltage that can kill you if you do not take pre-cautions.