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Car Computer Reset

Discussion in '1st Gen. Tacomas (1995-2004)' started by Ryan_3TacosIn, Aug 19, 2016.

  1. Aug 19, 2016 at 8:50 PM
    #1
    Ryan_3TacosIn

    Ryan_3TacosIn [OP] Well-Known Member

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    OME Shocks, 883 Coilovers, Synthetic Brake Lines, Dakar Leafs with AAL, Baja Rear Bumper; ES Body mount Bushings, Light Racing UCAs, American Racing Wheels w/ 33" Hercules Tires, and more to come...
    Guys-

    I had an engine fault code and had the E brake replaced. The E Brake was giving me the "check engine" light and I'm trying to get the truck inspected. The guys at the dealership are telling me that I have to drive it at least 100 miles before I can bring it in for inspection to get the fault code cleared out of the computer.

    Is there any way I can reset the computer to clear that fault code and have it inspected and pass?

    As you can see- I'm in Texas. Just wanted to see if anyone else had experience with this and what my options are.

    Thank you for your help.

    -Ryan
     
  2. Aug 19, 2016 at 9:35 PM
    #2
    crashnburn80

    crashnburn80 Vehicle Design Engineer

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    Doesn't matter how you reset it. After being reset the ECU will go into a drive cycle test, if they plug something into your OBDII port they will know. I have a reader that will detect when your vehicle is in the drive cycle test phase. You can reset it by disconnecting the battery for a couple min but you will still have to drive a while to clear the test phase.

    Edit: More specifically you can clear the code by disconnecting the battery or using a reader but it won't pass inspection for emissions until you complete the drive cycle.
     
  3. Aug 19, 2016 at 10:49 PM
    #3
    Ryan_3TacosIn

    Ryan_3TacosIn [OP] Well-Known Member

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    OME Shocks, 883 Coilovers, Synthetic Brake Lines, Dakar Leafs with AAL, Baja Rear Bumper; ES Body mount Bushings, Light Racing UCAs, American Racing Wheels w/ 33" Hercules Tires, and more to come...
    @crashnburn80 do you know how long the drive cycle is? Is it really 100 miles?
     
  4. Aug 19, 2016 at 11:02 PM
    #4
    crashnburn80

    crashnburn80 Vehicle Design Engineer

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    No. The drive cycle just covers a bunch of procedures that need to be preformed repeatedly in order for the ECU to validate all the systems. They just say 100 miles because it is easier for most consumers to understand.

    According to google drive cycle test:

    To perform an OBDII Driving cycle do the following:
    1. Cold Start. In order to be classified as a cold start the engine coolant temperature must be below 50°C (122°F) and within 6°C (11°F) of the ambient air temperature at startup. ...
    2. Idle. ...
    3. Accelerate. ...
    4. Hold Steady Speed. ...
    5. Decelerate. ...
    6. Accelerate. ...
    7. Hold Steady Speed. ...
    8. Decelerate.
    Without an OBDII reader capable of identifying the ECU being in the drive cycle test loop, I'm not sure how you would know the ECU has marked it as complete.
     
  5. Aug 19, 2016 at 11:25 PM
    #5
    Ryan_3TacosIn

    Ryan_3TacosIn [OP] Well-Known Member

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    OME Shocks, 883 Coilovers, Synthetic Brake Lines, Dakar Leafs with AAL, Baja Rear Bumper; ES Body mount Bushings, Light Racing UCAs, American Racing Wheels w/ 33" Hercules Tires, and more to come...
    Awesome. Thank you. I'm going to see what I can get worked out this weekend and what I can make happen by Monday.

    I'll report back.

    Thank you @crashnburn80 - sincerely thank you.
     
    crashnburn80 likes this.
  6. Aug 20, 2016 at 1:04 AM
    #6
    Wyoming09

    Wyoming09 Well-Known Member

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    I think you may have misunderstood or they just stated it rather poor .

    Any time the battery is disconnected or the codes cleared all the tests are cleared .

    Herein Pa to get your emission sticker all the tests need to have run and the mil has not tripped

    Sometimes it can take quite a few miles despite trying to follow the guidelines to make it happen

    I have had some take a few hundred miles

    A royal pain to me at first now There is a code reader in all my OBII vehicles
     
  7. Aug 20, 2016 at 2:48 AM
    #7
    cruiserguy

    cruiserguy Well-Known Member

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    This ^^^.
    They told you, OP, a hundred miles because after a hundred miles there's a good chance the specific conditions that the drive cycle has to complete will have been met. There isn't a specific mileage you need to complete. These tests that the OBD will run while you drive need to be completed without throwing the MIL. The only way to know for sure they are complete is with a scanner. So they weren't trying to BS you. You might want to get one of these bluetooth scanners for your own purposes:
    https://www.amazon.com/BAFX-Products-34t5-Bluetooth-Android/dp/B005NLQAHS
    There may be cheaper ones as well. Get the free Torque app to use with the scanner.
     

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