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dieselWillie
Dirt Road Driver
Posted
I figured Electronic Avenue was the best place because most of the trucks are computer controlled.

Could someone point me in the right direction for emission laws (US Federal)? When I go into get tested what do they look for on the OBDII? Are they just checking to see if it works, or are they checking the O2's or what? Where are the laws written down? Am I able to request a sniff test?


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1998 D22, 4x4, KA24DE, C200 (open), R180(open), 31x10.50 r15, King Cab, 5speed
 
Posts: 75 | Location: Tucson | Registered: January 06, 2008Reply With QuoteEdit or Delete MessageReport This Post
GOAT
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NISSAN4WHEELER
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OBDII test just checks that the system works. they hook-up a scanner or like device and run a simulation agains your computer. The only time I have see\heard of falures are: a dash light is on, a dash light will not turn on, or the cumputer needs to be reset.


-Mr. Goat-

One way to fix a jeep is to shoot the driver
 
Posts: 2135 | Location: Where Hell Won't Go!! Scottsdale, Arizona | Registered: April 19, 2003Reply With QuoteEdit or Delete MessageReport This Post
dieselWillie
Dirt Road Driver
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Well my OBDII is not interfacing with a scanner right now. How would I reset the computer? The thing is that I having no other problem with the truck.


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1998 D22, 4x4, KA24DE, C200 (open), R180(open), 31x10.50 r15, King Cab, 5speed
 
Posts: 75 | Location: Tucson | Registered: January 06, 2008Reply With QuoteEdit or Delete MessageReport This Post
Desert Rat
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Ultimate N4Wheeler
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On my '98 it's a plug and play test. All OBDII vehicles are this way - they don't run the sniff on them.

They do a test with the key on to ensure all the proper codes are displayed, and then with the truck at idle. I think you're allowed one error code, but not two.



1998 Frontier 4x4, 2002 Xterra 4x4, and Z28 street rocket
Pass here and go on. You're on the road to heaven - Kerouac
 
Posts: 22120 | Location: Home of the AZ runs | Registered: June 22, 2002Reply With QuoteEdit or Delete MessageReport This Post
System-F
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quote:
Could someone point me in the right direction for emission laws (US Federal)? When I go into get tested what do they look for on the OBDII? Are they just checking to see if it works, or are they checking the O2's or what? Where are the laws written down? Am I able to request a sniff test?


Just as an FYI for anyone in Texas:

Texas is somewhat complicated with OBDII and if you pass or fail. If the light is on while the engine is running you fail. If more than two non-continous checks have not passed (this has nothing to do with the light) then you will fail. Most checks non-continous reset after 2 driving cycles.



quote:
Well my OBDII is not interfacing with a scanner right now. How would I reset the computer? The thing is that I having no other problem with the truck.



I had this problem. The master plug going into the ECU was lose.



quote:
OBDII (Non -Continuous) Readiness Monitors check
These monitors are like self checks of each emissions component (EGR, O2 sensor, etc) within the OBDII system. These non-continuous monitors are considered Ready until either DTC's have been cleared with a scan tool or if battery power has been disconnected, then the monitors will reset back to Not Ready.

In order to get the monitors set back to Ready, the vehicle must be driven through a drive cycle, which is a combination of city/highway driving for a set period of time. This drive cycle relearns the OBDII system and rechecks all of the emissions component's individual systems. As each system completes its own self test, the monitor will set back to Ready.

If a problem still exists in any of the individual systems, a DTC will set again once the monitor changes to Ready. If a vehicle has a MIL ON with a DTC set and the owner disconnects the battery to clear the light to try to pass the test, all the non-continuous monitors reset back to Not Ready and the vehicle now fails for Not Ready.

We allow two (2) non-continuous monitors to be Not Ready and still pass the test, but three (3) or more Not Ready's will cause the vehicle to fail.

There are three (3) continuous monitors that are always Ready: Misfire, Fuel System, and Comprehensive Components. If you look at your Vehicle Inspection Report (VIR), you will see the emissions monitors listed and their Ready/Not Ready status. If any of the non-continuous monitors say N/A (Not Available) or N/S (Not Supported), then there is no monitor for that system.

This information is illustrated in a "Ready or Not" poster displayed in all of the emissions testing stations as well as the Recognized Emissions Repair Facilities (RERF's).



http://www.txdps.state.tx.us/vi/Misc/faq/faq_obdii.htm##4


http://overlandtrucks.com
 
Posts: 3336 | Location: Fort Worth, TX | Registered: April 04, 2003Reply With QuoteEdit or Delete MessageReport This Post
dieselWillie
Dirt Road Driver
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System-F,

Thank you! I unplugged the plug blew off the connection and plugged it back in. And wha-la. It works now.


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1998 D22, 4x4, KA24DE, C200 (open), R180(open), 31x10.50 r15, King Cab, 5speed
 
Posts: 75 | Location: Tucson | Registered: January 06, 2008Reply With QuoteEdit or Delete MessageReport This Post
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