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2001 Hyundai Elantra Question: Emissions test missing "READY" light, so can't pass smog.

 

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helaire, 2.0L 4 Cylinder, San Jose, CA, July 14, 2011, 17:30
 Rookie

No DTRs (problems) on smog report, just showing oxygen heat sensor and something to do with A/C "not ready", for months, hundreds of miles and 8 trips back to the shop to see whether it's "ready" yet. Drive Cycle is not on Hyundai website, or I can't find it. I called Hyundai USA--they were unable to provide a drive cycle for my car. They called the local dealer here and were told that sometimes even the dealer cannot get this problem resolved. The dealer then has to send customers to the Calif DMV referee to make an exception (which can only be done once, IF they will do it at all). Anyone know where can I get an accurate drive cycle for my 2001 Elantra, so I can try to get this resolved? Months & months late now for tags because of this. Thank you!!

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  • Answer #1

    patrick mannion from Greg Solow's Engine Room, July 14, 2011, 23:24
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     Master

    Call the smog people in Sacramento I know they have a list of cars that have problems passing monitors and they recognized this an offer an exemption I forget a friend had a Volvo with similar problems to yours and the state offered an exemption. Found this on Yahoo answers The following is a summary of generic OBD II
    drive cycle instructions for a Hyundai:
    • The Intake Air Temperature (IAT) should be
    between 14 and 122 degrees F.
    • Barometric pressure should be equal to or
    greater than 75 kPa.
    • The fuel tank should be between 25 and 75%
    full at the start of the test.
    •During acceleration, keep throttle 1⁄4 to 1⁄2 open.
    • During deceleration, slow to less than 15 mph
    at an engine speed of less than 1000 rpm without
    touching the brake or clutch pedal.
    • During cruise, maintain a steady engine speed
    between 1400 and 4000 rpm.
    • At idle speed, keep the throttle closed and the
    gear selector in the Neutral position.
    Remember, these are just the preliminary
    instructions. The actual drive cycle must conform
    exactly to the following instructions, or the
    various monitors may not run to completion.
    • The drive cycle begins with a cold engine
    startup. The IAT must be between 32 and 85
    degrees F. Engine Coolant Temperature (ECT)
    must be less than 127 degrees F. It may be
    necessary for the customer to leave the car with
    you overnight so it can cool down completely.
    The engine coolant and intake air temperatures
    must be within a tight range to complete all of
    the OBD II monitors during the drive cycle. If
    the IAT input is not between 32 and 86 degrees
    F at the beginning of the drive cycle, the EVAP
    monitor will not run.
    • Start the engine and allow it to idle in Park for
    one to two minutes.
    •Within the first minute and a half, accelerate at
    1⁄4 to 3⁄4 throttle to 50-55 mph. Hold that speed for
    2-3 minutes. Unless your shop is very close to a
    major expressway, it may be difficult to satisfy this
    step in the drive cycle.
    •Decelerate to 0 mph without braking, then idle
    for 1-2 minutes. If you’re on an expressway, pull
    safely off the road during this segment.
    • Accelerate to 55 mph, using 1⁄4 to 3⁄4 throttle,
    then hold a steady cruise for 10 to 20 minutes.
    • Return to 0 mph with the engine idling in Park,
    then turn the ignition off.

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    helaire, July 15, 2011, 01:34
     Rookie

    Thank you very much, Patrick! I will follow up as you suggest.

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