![]() Decelerate (coast down) to a stop without braking. OBDII monitors catalytic converter efficiency, misfire, EGR, fuel trim, oxygen sensors and purge functions.ħ. Hold at a steady speed of 55 to 60 mph for five minutes. OBDII checks misfire, fuel trim and purge again.Ħ. Accelerate back to 55 to 60 mph at æ throttle. Decelerate (coast down) to 20 mph without braking or depressing the clutch. OBDII monitors EGR, air pump, O2 sensors and canister purge.Ĥ. Hold at a steady state speed of 55 mph for three minutes. ![]() OBDII checks for ignition misfire, fuel trim and canister purge.ģ. Turn the A/C and rear defrost off, and accelerate to 55 mph at half throttle. OBDII checks oxygen sensor heater circuits, air pump and EVAP purge.Ģ. ![]() As soon as the engine starts, idle the engine in drive for two and a half minutes with the A/C and rear defrost on. NOTE: The ignition key must not be on prior to the cold start otherwise the heated oxygen sensor diagnostic may not run.ġ. The OBDII drive cycle begins with a cold start (coolant temperature below 122 degrees F and the coolant and air temperature sensors within 11 degrees of one another). It may take several tries over many days. However, be aware that conditions must be exactly right to reset. The two long decel periods test the oxygen storage capability of the catalyst. This assumes no current or pending fault codes. The following usually works on most cars. enough info for one post.Ĭlick to expand.The drive cycle generally requires two trips to complete. And if you live too far away from the freeway and the catalyst converter gets too hot, your readiness may never set =P. 35-45 mph at 3-5 mins and gentle acceleration up to 55-60 mph for 3-7 mins depending on how old it was outside when you started the car. ![]() The generic cycle is something along the line of. I still have yet to get the catalyst to set on 3 smart cars so far, but again it's not really distance but based on the quality of the drive and it has to hit a specific amount of drive cycles for it to complete. it compares calibration data with factory and checks your exhaust thru ur factory o2 sensor. California enacted a new smog test that went into effect mid 2014 which doesnt require the cars to run on a dyno and the sniffer tube stuck up it's exhaust, it's all based on more indepth reading into the OBD II port. The last one that takes the longest to complete is the catalyst converter, however it's also the one required in california to complete even though you may have one of the other ones incomplete to run the smog test. at the same time your HO2S, the heated oxygen sensor will also be running it's test after you take off. I would advice to not move the car for 2-3 cycles of this, it takes about 30 seconds for it to complete. You'll hear the air pump kick in for the secondary air readiness test. You will also need to complete a few cold start up where the intake air temp and coolant temp are within a few degrees of each other. I have yet to find the exact drive cycle for the smart car but this is based on experiences with other cars and the smart cars. It's not based on mileage but based on the quality of the drive.Įvap, secondary air usually completes with between 1/4 - 3/4 tank of gas, engine warmed up, and engine is decelerated without stepping on the brakes from approx 60 mph down to 30 mph. Each one of those test will complete after it follows a per set, pre programmed drive cycle. The readiness indicators are reset either when the battery dies or a check engine light is reset. I am considering flashing the PCM and starting over.I have 3 smart cars at my shop right now that needs to complete it's smog in california. I don't think new O2 sensors will do anything. Obviously, more driving is not going to cure this one. The mode 6 results shown are well below the maximum (if they can believed) I paid the $19.00 for 72 hours of Kia factory service information and did not find anything that shows this is an ongoing issue. The In Use Performance tracking show that the O2 is meeting the criteria and completing the test, just no readiness is set. As you can see in the file, the light was last cleared 52047 KM ago. It failed at another facility and then here with me. The customer said the check engine light has never been on. Unlike most of the vehicles sent to me with readiness issues, this one has not had any repair, no MIL has been on and no low battery issues reported. Here we have yet another monitor readiness issue.
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