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Engine seized? 118k miles

Discussion in 'Gen 3 Prius Technical Discussion' started by Jamesmlemay, Nov 30, 2018.

  1. ASRDogman

    ASRDogman Senior Member

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    Than the 12v battery should be fine, since it's new, and you charged it.
    Maybe you need to install techstream again. Maybe contact the one you bought it from and see if
    they will help you. They should be able to get you working.
     
  2. Jamesmlemay

    Jamesmlemay Member

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    I did. He replied really quickly with some ideas to try. They did not work but he sent me an older version to try. It is all installed but I wont be back to the car till tomorrow. I quickly checked wiring to the crank sensor and didn't see anything damaged but its inside a casing. In the vw/audi world I would check wiring by finding the color at the ecu plug and check the continuity. Did not show me where it was broken but showed me if it was broken. I don't even know where the crank sensor wiring goes to on this thing. lol
     
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  3. mjoo

    mjoo Senior Member

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    I wouldn't do this without a current-limiting resistor. Without the battery fan running, limit the charge to tens of milli-amps or you could fry your battery.

    You can then monitor the current by Vresistor/Rresistor.

    Charging the modules in parallel is safer and you balance them at the same time.

    Pixel XL ?
     
  4. cnc97

    cnc97 Senior Member

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    Does an auto parts store near you have a crank sensor that you could run a continuity test (ohms) on? See if it’s dramatically different from the results you got on yours. Check to see if there is 12v present at the ignition coils when power button is pressed.

    I have sat and listened to my Prius start the gas engine several times the past week(I sit in it during my lunch hour with the heater on). It literally takes two seconds for the MG to spin it up to start. If yours spins up, but doesn’t start, then it’s missing one of the basics to run. Spark, fuel, or compression. You can get a yes or no on the compression by turning the engine over by hand. But since the crank sensor code came back, that’s got me thinking it’s the issue.

    Clear the codes, power off, then unplug the sensor. Power on. If you get the SAME crank sensor code, the wiring is the issue. If you get a different crank sensor code, the sensor is bad.

    If the same code comes back, the wiring is broken, and the sensor reads open(unplugged). If the code is different, the sensor is shorted(grounded).
     
  5. Jamesmlemay

    Jamesmlemay Member

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    The crank code comes back immediately. I checked the ohms per toyota specs. I also checked to make sure it made its own voltage. I checked over the wiring and all looks well. I even removed the loom for the first foot and a half from the plug. The crank sensor wiring is in its own sleeve inside of the loom. All seems well. Mine errors out before even trying to start. I ordered a prolong charger. Hopefully I get it this week.
     
  6. cnc97

    cnc97 Senior Member

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    Best of luck. Maybe you’ll get lucky and it will start with a charged battery.
     
  7. TMR-JWAP

    TMR-JWAP Senior Member

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    Just wanted to mention something that hasn't been....

    There's 4 parts to the crank position sensor circuit.
    Starting from the inside of the engine....

    Toothed plate/Sensor plate
    Sensor
    Wiring Harness
    ECM/ECU

    If the sensor is good and the harness is verified good, the choices are getting narrowed down.
     
  8. cnc97

    cnc97 Senior Member

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    Toothed plate can be examined with a borescope thru the sensor hole. But it would take an internal chain failure to mess up the plate. That would be manifested in a lack of compression on one or more cylinders.
     
  9. TMR-JWAP

    TMR-JWAP Senior Member

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    Check this out for some good info. It's from Luscious Garage. Repairing a P0335. Click on each photo in order. Each photo will enlarge and include comments about what is being checked. It has Techstream displays showing what they're looking at. It may just make you want to replace the sensor, regardless of what it "reads" during your checks.

    Luscious Garage Rocks............

    ‪Repair of the Day - Prius Crankshaft Sensor P0335 P0341 P0A90 | فيسبوك‬
     
    #69 TMR-JWAP, Dec 10, 2018
    Last edited: Dec 10, 2018
  10. Jamesmlemay

    Jamesmlemay Member

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    Nice good to look over. Different than my car unfortunately. My sensor looked good on top of the Toyota testing too. Haven't ruled it out yet. Car is on charger. State of charge was around 10 percent. Seems to be about 200 amps. All blocks between 14.38 and 14.60 except for one at 13.23.
     
  11. Jamesmlemay

    Jamesmlemay Member

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    I charged up the battery. The engine will not start. Car will move on battery power. Only code remaining is p0335 crank sensor circuit malfunction. Same code whether the sensor is plugged in or not. I inspected the first foot or so of wiring from the plug and it was all in great shape. I wish I knew which pins on the ecu were related to the sensor so I could check resistance. If it's not in the wiring it has to be the ecu?

    If it is the ecu, can the be swapped out at home or does a dealer need to do it?
     
  12. Raytheeagle

    Raytheeagle Senior Member

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    Looks like one block has a module with a cell out if it is more than 1.2 volts different.

    The best way to get diagrams and information is to pay $20 at tech info and you get 2 days to download the files you need.

    Good luck and keep us posted (y).
     
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  13. Jamesmlemay

    Jamesmlemay Member

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    Battery looks good after charge.
     

    Attached Files:

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  14. Raytheeagle

    Raytheeagle Senior Member

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    How did you charge it up?

    Was that screen shot taken under load?

    How does the battery perform under load?

    Do you see variance in the voltages?

    Which block was the suspect one?
     
  15. Jamesmlemay

    Jamesmlemay Member

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    Charged it with prolong charge. I'll have to look which one it was. I'm happy with the battery for the time being now I need to figure out the crank sensor.
     
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  16. cnc97

    cnc97 Senior Member

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    If the code is the same plugged in or not, then it’s either the ICE ecu or wiring. I would look at the ICE ecu for the same color wires that are at the crank sensor plug.
     
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  17. Raytheeagle

    Raytheeagle Senior Member

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    I’d also find the wiring diagram for additional troubleshooting help.

    While getting the wiring diagrams, you’ll be able to see what additional troubleshooting there is for the trouble code.

    Good luck and keep us posted (y).
     
  18. ASRDogman

    ASRDogman Senior Member

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    How much is a crank sensor? Are you capable of changing it yourself?
     
  19. Mendel Leisk

    Mendel Leisk Senior Member

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  20. ASRDogman

    ASRDogman Senior Member

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    see, ya knew what I meant....
    "Other Names:Crankshaft Sensor, Camshaft Position Sensor, Sensor Crank Positi"