01 Prius ABS Brake Chime looking for community help

Discussion in 'Generation 1 Prius Discussion' started by PriusNuevo, Jun 26, 2013.

  1. PriusNuevo

    PriusNuevo Junior Member

    Joined:
    Mar 10, 2012
    28
    0
    0
    Location:
    Boynton Beach Fl
    Vehicle:
    2001 Prius
    Model:
    I
    I just hit a pot hole this morning. Not too bad but instantly the abs/brake light and chime came on. Parked the car and turned it on and off to no avail. I drove home while the car was very hard to stop.

    I looked online and found out about the booster pump leaking, relays, fuses, sensors, Etc. I raised the car checked all the sensors on the wheels and they all look fine. I looked for brake fluid coming from booster pump but found no fluid.

    I checked all relays and fuses and they all seem fine. Of course I would have to test the relays but have not done it yet. Checked the main battery and it looks perfect.

    Removed the windshield wipers and the metal frame to get to the pump. Turned on the car and it seems the pump turns on, it makes a noise and it vibrates but it seems that is not pressurising the system. There is brake fluid and full.

    Btw, 2001 Prius with 156000 miles.

    Looking for some advise from the community. Thanks.

    Forgot to mention that no Check Engine Light codes for the abs. I had a previous O2 sensor code that I have procrastinated about but nothing else but something weird. I had 4 codes for cylinder misfire even though the car is running fine. I'm thinking that the pot hole might have screwed up the computer.
     
  2. usnavystgc

    usnavystgc Die Hard DIYer and Ebike enthusiast.

    Joined:
    Jul 29, 2011
    3,159
    964
    0
    Location:
    Tucson, AZ
    Vehicle:
    2005 Prius
    Model:
    Four
    How about resetting the car by unhooking the neg cable on the 12V battery for a minute or two and see if the light comes back on. It sounds to me like a wheel speed sensor got jarred.
     
    yotatoter likes this.
  3. bwilson4web

    bwilson4web i3 and Prime

    Joined:
    Nov 25, 2005
    23,002
    12,872
    0
    Location:
    Huntsville AL with 2014 BMW i3-REx
    Vehicle:
    2017 Prius Prime
    Model:
    Prime Plus
    Search for user "Chapman" and "code flash". Alternatively, search for "OBD scanner" and see what makes sense. The computer will tell you what is going on if you have a Prius-aware scanner."

    Bob Wilson
     
  4. PriusNuevo

    PriusNuevo Junior Member

    Joined:
    Mar 10, 2012
    28
    0
    0
    Location:
    Boynton Beach Fl
    Vehicle:
    2001 Prius
    Model:
    I

    I removed the positive cable from the battery for about a half an hour. It still the same, before the abs and brake lights were constant and now the brake is constant and the abs is blinking.
     
  5. PriusNuevo

    PriusNuevo Junior Member

    Joined:
    Mar 10, 2012
    28
    0
    0
    Location:
    Boynton Beach Fl
    Vehicle:
    2001 Prius
    Model:
    I
    I have a bluetooth OBD scanner in combination with the torque app. That's how I pulled those codes earlier but I reset them and now I get no codes.
     
  6. ChapmanF

    ChapmanF Senior Member

    Joined:
    Mar 30, 2008
    8,286
    5,935
    0
    Location:
    Indiana, USA
    Vehicle:
    2010 Prius
    Model:
    IV
    I'll chime in here just so there is a post with those key words that you can find. :)

    All this is in the service manual volume 1, but just quickly:

    Find the diagnostic (DLC3) connector under the dash (near the driver's left knee). With the car OFF, use a bit of wire, bent paper clip, etc., to connect pins 13 and 4 (TC and CG) together. (To be sure how the pins are numbered, you can ask Mr. Google for DLC3 pinout.) Then turn the key ON (not all the way to READY, just ON).

    Lots of things on the dash will start flashing, and the multifunction display will pop up a diagnostic screen in Japanese. The different flashing lights are diagnostic codes from different computers in the car. You're watching for blinks of the ABS light. Steady half-second blinks mean no code to report. Otherwise, you get two-digit codes like "blink blink (pause) blink blink blink (longer pause) blink blink (pause) blink blink blink blink" which would mean you have codes 23 and 24. If you miss writing one down, just wait, the sequence keeps repeating. Turn the key back off and remove your wire or paper clip.

    You can post the numbers back here and somebody can look them up. Volume 1 of the manual gives the translations between the two-digit blink codes and the usual OBD-II diagnostic codes. For some of the computers the translation is direct (e.g. blink code xy corresponds to OBD code C12xy) and for others it's funky and has to be looked up. (At the moment, I forget which way the ABS codes go - haven't got the manual in front of me.)

    Of course you'll want to do this before disconnecting the battery or doing anything else to clear codes, or you won't have the codes to read.

    Just reference for anybody else reading this: you can't get blink codes for the HV or traction-battery computers, a Prius-aware OBD-II scanner is the only way to talk to those. You can get blink codes from the steering computer but only by connecting your own light to blink, because there isn't one on the dash for it.

    -Chap
     
  7. PriusNuevo

    PriusNuevo Junior Member

    Joined:
    Mar 10, 2012
    28
    0
    0
    Location:
    Boynton Beach Fl
    Vehicle:
    2001 Prius
    Model:
    I
    Thanks Chap for the info. I pulled the codes and this is what I got

    33
    52
    53
    54
    56
    64

    I've been looking online and I think 33 it's the abs sensor for the right rear wheel.
     
  8. ChapmanF

    ChapmanF Senior Member

    Joined:
    Mar 30, 2008
    8,286
    5,935
    0
    Location:
    Indiana, USA
    Vehicle:
    2010 Prius
    Model:
    IV
    Here are the translations, from pages DI-358, DI-359:

    33 C0210 right rear speed sensor malfunction (see page DI-366)
    52 C1252 booster pump motor ON time abnormally long (see page DI-409)
    53 C1253 malfunction in hydro motor relay circuit (see page DI-416)
    54 C1254 malfunction in pressure switch (see page DI-421)
    56 C1256 malfunction of accumulator low pressure (see page DI-424)
    64 C1214 malfunction in hydraulic system (see page DI-386)

    The referenced pages are where the troubleshooting steps start for each of the codes. As I posted earlier, it might be possible you induced some of these codes while checking things before, so maybe you'll want to clear codes and then focus on troubleshooting just the ones that come back.

    Maybe the pothole knocked loose a wiring harness connector to either the booster pump or the pressure switches? I could imagine more than one of these codes in response to something like that.

    -Chap
     
    Alfonso13 likes this.
  9. Trash Monkey

    Trash Monkey New Member

    Joined:
    Oct 7, 2014
    3
    0
    0
    Location:
    Morgantown, PA
    Vehicle:
    2001 Prius
    Model:
    N/A
    Sorry to post on such an old thread, but I just did the jumper wire method to pull ABS codes and got a 15. If anyone can translate that, it would be greatly appreciated. I'm new to the forum and a fairly new 1st gen Prius owner.
     
  10. rlin78

    rlin78 Junior Member

    Joined:
    Dec 8, 2007
    21
    3
    0
    C1215/15 is Low positive voltage of linear solenoid (DI–397). Trouble area is Battery, Charging system, and Power source circuit. While I am not familiar with this code, I would check the battery and grounding first. FSM also mentioned that the code is set in the following conditions.
    When any of the following 1. or 2. is detected: 1. When the ignition switch is ON, the condition that the voltage of the terminal +BS in brake ECU is 2.5 V or less continues for 0.5 sec. or more. 2. While a vehicle is driven at a speed of 3 km/h (5 mph) or more, the condition that the voltage of the terminal +BS in brake ECU is 9 V or less continues for 10 sec. or more. One really needs the FSM and a Prius aware scanner to work on the car.
     
  11. usnavystgc

    usnavystgc Die Hard DIYer and Ebike enthusiast.

    Joined:
    Jul 29, 2011
    3,159
    964
    0
    Location:
    Tucson, AZ
    Vehicle:
    2005 Prius
    Model:
    Four
    This sounds like a low/weak 12V battery issue to me.
     
Loading...