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Re: Chrysler Tech?--OBD-II system?
[Re: Mopar_Ray]
#1475818
07/29/13 11:20 AM
07/29/13 11:20 AM
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Joined: Sep 2007
Posts: 1,893
Spahn Ranch
RMCHRGR
top fuel
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top fuel
Joined: Sep 2007
Posts: 1,893
Spahn Ranch
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Yes, there is a drive cycle. Usually about 30 miles at a constant speed. Take it out on the highway and come back, it should set the monitor. Do you have a DRB? Not sure if a generic scanner will show whether the monitors are set.
Under normal conditions when you're not trying to get it to pass an emissions test, the PCM needs to see things like operating temp and the 02 switching to set monitors. Sometimes we'd have to let the cars sit overnight and get cold, then drive them first thing in the morning the next day but that was mostly with Evap stuff. Also, the Evap monitor usually won't run if the tank is more than 85% full or less than 15% full but the drive cycle should override all that though if you can do it.
'71 Duster
'72 Challenger
'17 Ram 1500
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Re: Chrysler Tech?--OBD-II system?
[Re: Mopar_Ray]
#1475819
07/29/13 11:27 AM
07/29/13 11:27 AM
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Joined: Jan 2007
Posts: 685
pennsylvania
poboyengineering
mopar
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mopar
Joined: Jan 2007
Posts: 685
pennsylvania
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my rule of thumb drive cycle:
fuel lever 1/4 to 3/4 tank. (the evap test will not run unless it sees this level.)
cold start (cts and ambient air temp +/- 10 degrees.)
let idle in park for two minutes.(this is for the O2 heaters)
part throttle to 55 mph, hold for 5 minutes. (this runs the evap cycle)
3 throttle off, no brake decels to 25 mph. (egr)
complete stop, in gear, brake on for 2 minutes. (cat)
this works about 99 percent of the time.
It may be ugly, but it sure is slow.
Girls comb their hair in rear view mirrors and the boys try to look so hard....
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Re: Chrysler Tech?--OBD-II system?
[Re: RMCHRGR]
#1475820
07/29/13 01:34 PM
07/29/13 01:34 PM
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Joined: Mar 2003
Posts: 18,678
Fresno, CA
Jim_Lusk
I Live Here
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I Live Here
Joined: Mar 2003
Posts: 18,678
Fresno, CA
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Quote:
Yes, there is a drive cycle. Usually about 30 miles at a constant speed. Take it out on the highway and come back, it should set the monitor. Do you have a DRB? Not sure if a generic scanner will show whether the monitors are set.
Under normal conditions when you're not trying to get it to pass an emissions test, the PCM needs to see things like operating temp and the 02 switching to set monitors. Sometimes we'd have to let the cars sit overnight and get cold, then drive them first thing in the morning the next day but that was mostly with Evap stuff. Also, the Evap monitor usually won't run if the tank is more than 85% full or less than 15% full but the drive cycle should override all that though if you can do it.
My lower end scanner (Auto Xray) will tell me if the monitors have been set...
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