Diagnostic Trouble Code Listing

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by toyoprius, Dec 21, 2005.

  1. toyoprius

    toyoprius New Member

    Joined:
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    Vehicle:
    2004 Prius
    I googled and googled and came up dry. I also searched here. Does anyone know of an online DTC listing for a 2004 Prius?

    Absent that, I just received a ScanGuage gift and have been playing around with it. I see I have a U0293 Trouble Code with PID002=C293. The Prius seems to work fine. Can someone with a service manual decode this for me? The only (minor) historical items of note were running out of fuel once, and running the smaller battery down resulting in a need to jump the car.

    Thanks.
     
    #1 toyoprius, Dec 21, 2005
  2. narf

    narf Active Member

    Joined:
    Mar 15, 2005
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    Location:
    Colorado
    Vehicle:
    2016 Prius
    Model:
    Four Touring
    A quick search of the data I downloaded from the Toyota Tech site shows:
    "DTC U0293 LOST COMMUNICATION WITH HV ECU
    MONITOR DESCRIPTION
    The ECM and the HV control ECU are connected through a set of communication lines on the CAN, in order
    to maintain mutual communication. The ECM uses the communication lines to transmit the engine speed
    or other pieces of information to the HV control ECU. The HV control ECU transmits signals such as a engine
    torque request signal to the ECM.
    A few seconds after the power switch is turned ON, the ECM starts checking for any malfunction in the communication
    with the HV ECU. If the ECM detects a malfunction in the communication, the ECM sets a DTC
    and illuminates the MIL.
    MONITOR STRATEGY
    Related DTCs U0293: Lost communication with HV ECU
    Required sensors/ components ECM
    Frequency of operation Continuous
    Duration 0.68 second
    MIL operation Immediately
    Sequence operation None
    TYPICAL ENABLING CONDITIONS
    The monitor will run whenever the following DTCs are not
    present
    See page 05–24
    Power switch ON
    TYPICAL MALFUNCTION THRESHOLDS
    Communication signal No signal from HV ECU 05FO7–03"

    I don't know if this specifically relates to your codes. Sometimes a one time hicup in the system sets codes like this.

    I downloaded most of the info off of
    http://techinfo.toyota.com/

    Get a one day account for $5 and ftp away!
     
    #2 narf, Dec 21, 2005
  3. IFixEm

    IFixEm New Member

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    The hv ecu lost communication with other ecu's thru the CAN for at least .68 seconds.

    Regards, Mike
     
    #3 IFixEm, Dec 21, 2005
  4. toyoprius

    toyoprius New Member

    Joined:
    Mar 11, 2004
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    Vehicle:
    2004 Prius
    Thanks, narf and Ifixem! I will subscribe to the tech site next time I get a hiccup.
     
    #4 toyoprius, Dec 26, 2005
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