1. Attachments are working again! Check out this thread for more details and to report any other bugs.

Mg1/mg2 renamed?

Discussion in 'Gen 3 Prius Technical Discussion' started by Yippeekyaa, Aug 21, 2017.

  1. Yippeekyaa

    Yippeekyaa Active Member

    Joined:
    Mar 19, 2017
    137
    160
    0
    Location:
    North Carolina
    Vehicle:
    2011 Prius
    Model:
    Three
    IMG_6289.PNG IMG_6290.PNG
    I use an iPhone app to monitor temps while on road trips. On my gen 3 the electric motors were called mg1 and mg2. When I set up the app on the gen4 the naming appears to be different. They are now called the "motor generator" and the "inverter generator". This still has me confused.

    Photos are of the various options I have available to view and you can see the different naming used.
     
  2. Yippeekyaa

    Yippeekyaa Active Member

    Joined:
    Mar 19, 2017
    137
    160
    0
    Location:
    North Carolina
    Vehicle:
    2011 Prius
    Model:
    Three
    Oops. Got the names backwards. Sorry
     
  3. Trollbait

    Trollbait It's a D&D thing

    Joined:
    Feb 7, 2006
    21,594
    11,213
    0
    Location:
    eastern Pennsylvania
    Vehicle:
    Other Non-Hybrid
    I've heard nothing of an official change.
    Based on how the respective M/G are used most of the time. I'd same M/G1 is the generator, and M/G2 the motor.
     
  4. CooCooCaChoo

    CooCooCaChoo Active Member

    Joined:
    Jan 7, 2015
    886
    493
    0
    Location:
    Cow-lee-fornia
    Vehicle:
    2023 Prius
    Model:
    LE
    Pretty sure they still both do the same thing. They've been redesigned and moved around is all.
     
  5. Prodigyplace

    Prodigyplace Senior Member

    Joined:
    Nov 1, 2016
    11,696
    11,317
    0
    Location:
    Central Virginia
    Vehicle:
    2017 Prius
    Model:
    Two
    I was thinking the software vendor did not know the Prius MG1 & MG2 terminology.
     
    Trollbait likes this.
  6. Elektroingenieur

    Elektroingenieur Senior Member

    Joined:
    Jan 8, 2017
    2,515
    3,253
    9
    Location:
    California
    Vehicle:
    2016 Prius
    Model:
    Three Touring
    The parameter names in the app, with “Generator” or “Motor” rather than “MG1” or “MG2,” appear to be the same as those used in Toyota’s Techstream diagnostic software. For example, “Generator Inverter Calculated Temperature just after IG ON,” from @Yippeekyaa's second screen shot, appears in the Hybrid Control Data List in Techstream with exactly the same spelling and capitalization.

    Toyota’s Repair Manual and New Car Features books still refer to the two※ synchronous machines in the fourth-generation Prius as the “Motor Generator No. 1 (MG1),” “Generator (MG1),” or “MG1” and “Motor Generator No. 2 (MG2),” “Motor (MG2),” or “MG2.”

    ※ Except Prius with E-Four (ZVW55; Japan only), which also has “MGR (Motor Generator Rear).”
     
    SFO, Prodigyplace and Trollbait like this.
  7. Yippeekyaa

    Yippeekyaa Active Member

    Joined:
    Mar 19, 2017
    137
    160
    0
    Location:
    North Carolina
    Vehicle:
    2011 Prius
    Model:
    Three
    That makes sense as the app searches for all available pids from the cars CPU. Only costs 10$ for the full diagnostic suite on the app plus 3.99 for the app itself. Finding it very useful and customizable.
     
  8. Prodigyplace

    Prodigyplace Senior Member

    Joined:
    Nov 1, 2016
    11,696
    11,317
    0
    Location:
    Central Virginia
    Vehicle:
    2017 Prius
    Model:
    Two
    What is the app name? Inquiring minds want to know...
    Does it just display data or can you set things like the reverse alert?
     
  9. Yippeekyaa

    Yippeekyaa Active Member

    Joined:
    Mar 19, 2017
    137
    160
    0
    Location:
    North Carolina
    Vehicle:
    2011 Prius
    Model:
    Three
    It's called obd fusion. I'll do a full write up about it tonight. Been playing with the app for a year now. Does basically everything techstream does. You can customize gauges for everything, as many pages of gauges you want. I disabled the reverse beeps on both prii with it and the rear passenger seat belt in the new Prius. Dog kept setting it of which was rather annoying.
     
    ILuvMyPriusToo and Prodigyplace like this.
  10. Prodigyplace

    Prodigyplace Senior Member

    Joined:
    Nov 1, 2016
    11,696
    11,317
    0
    Location:
    Central Virginia
    Vehicle:
    2017 Prius
    Model:
    Two
    @Tideland Prius may want to add this information to the PC Glossary. Perhaps Toyota is moving away from the MG1 / MG2 naming.
     
  11. Prodigyplace

    Prodigyplace Senior Member

    Joined:
    Nov 1, 2016
    11,696
    11,317
    0
    Location:
    Central Virginia
    Vehicle:
    2017 Prius
    Model:
    Two
    So, if we have a Generator, how long until somebody wants to "upgrade" from a Generator to an Alternator? :eek:
    I see discussions like that on older tractor forums.
     
  12. Tideland Prius

    Tideland Prius Moderator of the North
    Staff Member

    Joined:
    Oct 2, 2004
    44,767
    16,016
    41
    Location:
    Canada
    Vehicle:
    Other Non-Hybrid
    Model:
    N/A
    Done.

    So what happens in the Prime when the clutch is disengaged and MG1 and MG2 work together? :D
     
    Prodigyplace likes this.
  13. CooCooCaChoo

    CooCooCaChoo Active Member

    Joined:
    Jan 7, 2015
    886
    493
    0
    Location:
    Cow-lee-fornia
    Vehicle:
    2023 Prius
    Model:
    LE
    With their powers combined, they become MG3!
     
    pilotgrrl and Tideland Prius like this.
  14. Prodigyplace

    Prodigyplace Senior Member

    Joined:
    Nov 1, 2016
    11,696
    11,317
    0
    Location:
    Central Virginia
    Vehicle:
    2017 Prius
    Model:
    Two
    I guess then we have motor + generator just to confuse things further. :eek:
     
    Tideland Prius likes this.
  15. Yippeekyaa

    Yippeekyaa Active Member

    Joined:
    Mar 19, 2017
    137
    160
    0
    Location:
    North Carolina
    Vehicle:
    2011 Prius
    Model:
    Three
    There are a few other pids in the list and I don't have a clue what they are. Hang on I'll grab some screenshots. Something about boosting invertor and boosting controller.

    IMG_4577.JPG IMG_4578.JPG IMG_4579.JPG IMG_4580.JPG

    First photo, is boosting converter vacuum boost? Second photo, insulation resistance on the various motors? Third photo, short wave values? Fourth photo, v phase current? I'm cluless what those are or mean.
     
    #15 Yippeekyaa, Aug 27, 2017
    Last edited: Aug 27, 2017
  16. Elektroingenieur

    Elektroingenieur Senior Member

    Joined:
    Jan 8, 2017
    2,515
    3,253
    9
    Location:
    California
    Vehicle:
    2016 Prius
    Model:
    Three Touring
    Toyota’s Repair Manual explains each parameter in the Data List/Active Test section for the relevant system.
    No, the boost converter is part of the inverter with converter assembly in the hybrid system. As Toyota’s New Car Features book explains, it “Boosts the HV battery nominal voltage of DC 201.6 V / DC 207.2 V up to a maximum voltage of DC 600 V and vice versa (steps down DC 600 V to DC 201.6 V / DC 207.2 V).”
    From the New Car Features book: “The leak detection circuit constantly monitors that the insulation resistance between high-voltage circuits and body ground is maintained. [...] The leak detection circuit has an AC source and causes a small amount of AC to flow to the high-voltage circuit (positive and negative). The more insulation resistance decreases, the more voltage steps down at the detection resistor and the lower the waves of AC. The insulation resistance value is detected based on the amplitude of AC waves.”

    In the parameter names, “short wave” refers to the AC source in the leak detection circuit; “MG Inv,” motor and generator inverter; “A/C Inv,” air conditioning inverter; and “SMR,” system main relays.

    The Repair Manual section for DTC P0AA649, “Hybrid/EV Battery Voltage System Insulation Resistance Decreased,” and its unsavory associates, P1C7C49, P1C7D49, P1C7E49, and P1C7F49, has more about this.
    MG1 and MG2 are three-phase machines, and Toyota uses the letters U, V, and W to identify the three phases.
     
    kc410 and Prodigyplace like this.
  17. Yippeekyaa

    Yippeekyaa Active Member

    Joined:
    Mar 19, 2017
    137
    160
    0
    Location:
    North Carolina
    Vehicle:
    2011 Prius
    Model:
    Three

    Thanks so much for that info. Very helpful.
     
  18. kalamazandy

    kalamazandy New Member

    Joined:
    Oct 30, 2017
    5
    1
    0
    Location:
    Kalamazoo, MI
    Vehicle:
    2011 Prius
    Model:
    II
    I purchased that app already, but I am having troubles finding the right PID for the backup beeps. I was wondering if you had any resources to point me in the right direction. I learned Charista has it built in, but that's another 20 bucks. I'll spend it if I have to, but since I already have another, seemingly capable app, I'd like to just figure that out.
    I found another page using Torque, but I think that's specifically using Android (which I don't have). But that one was cool because you can send different terminal instructions to do things like change the beep to One beep instead of continuous, or turn it off completely.
    I'd love some help if you could.
     
  19. alanclarkeau

    alanclarkeau Senior Member

    Joined:
    Feb 24, 2016
    7,041
    7,580
    0
    Location:
    near Brisbane, Australia
    Vehicle:
    2016 Prius
    Model:
    N/A
    If you're about to buy a Gen 4, insist on the dealer removing the backup beeps before delivery - they should do it for free.
     
    pilotgrrl and Prodigyplace like this.
  20. kalamazandy

    kalamazandy New Member

    Joined:
    Oct 30, 2017
    5
    1
    0
    Location:
    Kalamazoo, MI
    Vehicle:
    2011 Prius
    Model:
    II
    No, I bought a used 2011. I already used the ODB Fusion app, so I was just trying to figure out how to get the PID for it.