| fjb7839 |
I hope one of you techno wizzes can help me out. i just bought an o3 with nav. Prior to picking it up, it was cleaned up by a guy who left on the ignition switch for a full day, killing the battery. After starting it with a jump box. It was taken for a state inspection, which includes emissions. It failed the emissions test. I was told that the emissions computer detected that the battery was recently drained, and this is a way that some people try to fool the system to shut off "check engine" lights. Is this bogus?
zi was told to get a copy of the drive cycle charts and go through the steps to reset the drive cycle. I can not find out any info on drive cycles. I have been driving the vehicle for a week now and it is rescheduled for a retest on the inspection this thursday. |
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| G. COLTON |
quote:
Originally posted by fjb7839
I hope one of you techno wizzes can help me out. i just bought an o3 with nav. Prior to picking it up, it was cleaned up by a guy who left on the ignition switch for a full day, killing the battery. After starting it with a jump box. It was taken for a state inspection, which includes emissions. It failed the emissions test. I was told that the emissions computer detected that the battery was recently drained, and this is a way that some people try to fool the system to shut off "check engine" lights. Is this bogus?
zi was told to get a copy of the drive cycle charts and go through the steps to reset the drive cycle. I can not find out any info on drive cycles. I have been driving the vehicle for a week now and it is rescheduled for a retest on the inspection this thursday.
Since this is an 2003 vehicle I would assume that it is still under warranty. Take it to your dealer and let him square away any problems.
G |
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| vlam |
| Do you have a copy of the fail report? They should provide it for you. Since your MDX is an 03, I assume it's still under warranty? Take it to an Acura dealer and have them take a look at it. It should still be under warranty (doesn't matter if you are not the original owner). |
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| tlhurlbut |
Found this information linked below. Have you checked your owner's manual for drive cycle information? I'll look further using a google search to see if there is more information
http://www.gatewaycleanair.com/about/obdii-home.htm
This second link talks about Honda and Acura drive cycle. If you have made it over two drive cycles, you might have to visit your friendly service provider to insure all codes are cleared from the ODD II system. (On Board Diagnostic System, Second Generation)
http://flatratetech.com/pub34.htm
Good Luck |
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| Gregc |
What the emission test found was the Readiness tests for various components of the Emission control system have not completed (no power to the ECM erases all Codes and readiness test). These tests should complete after a certain "Drive Cycle" in other words a specific set of circumstances have to occur for the tests to complete. This normally happens within a few days of normal driving. There are specific parameters that have to happen during "Drive Cycle" in order for the readiness test to show as complete in the ECM.
For Honda (includes Acura) the following devices have to have a readiness test completed.
Evaporative (Standard)
Catalyst
O2 Sensor & A/F Sensor
Exhaust Sensor Heater
EGR
Here is the "Drive Cycle" that has to happen for each device:
Enhanced Evaporative System Monitor Drive Trace
Pre-Conditioning Requirements:
MIL must be off.
Cold soak vehicle for 8 hours.
Outside temperature is between 20 & 95E F (-7E C & 35E C).
Driving Procedure
1) Start and drive vehicle for 15 minutes.
2) Drive for one (1) minutes at a steady speed between 50 and 70 mph.
3) Bring vehicle to a stop (engine running).
4) Repeat steps 2 & 3 two more times.
5) Check for the readiness code with scan tool. If readiness remains unset, continue.
6) Remove fuel fill cap, reinstall.
7) Drive at a steady speed between 50 & 70 mph without moving the accelerator pedal for about 1 minute.
8) Bring vehicle to a stop (engine running).
9) Repeat steps 7 & 8 two more times.
Catalyst Monitor Drive Trace
Pre-Conditioning Requirements:
MIL must be off.
Driving Procedure
1) Start the engine. Hold it at 3,000 rpm with no load until the cooling fan starts.
2) Drive for about 10 minutes without stopping at highway speed (speed may vary).
3) Drive at a steady speed between 50 & 70 mph without moving the accelerator pedal for about 1 minute.
4) Close throttle for 5 seconds.
5) Repeat steps 3 & 4 three (3) times.
Oxygen Sensor & Air Fuel Ratio Monitor Drive Trace
Pre-Conditioning Requirements:
MIL must be off.
Outside temperature is between 20 & 95E F (-7E C & 35E C).
1) Start the engine. Hold it at 3,000 rpm with no load until the cooling fan starts.
2) Let engine idle for 5 seconds.
3) Drive at a steady speed between 50 & 62 mph for about 2 minutes.
4) Decelerate from 62 mph with a closed throttle for 5 seconds.
Exhaust Sensor Heater Monitor Drive Trace
1) Start the engine and let it idle for 5 seconds.
EGR Monitor Drive Trace
Pre-Conditioning Requirements:
None
Driving Procedure
1) Start the engine. Hold it at 3,000 rpm with no load until the cooling fan starts.
2) Let engine idle for 5 seconds.
3) Drive at a steady speed between 50 & 62 mph for about 2 minutes.
4) Decelerate from 62 mph with a closed throttle for 5 seconds.
If you have a scan tool it will tell you all the readiness tests that have completed. So in a few days after the battery is charged, all the readiness tests should complete and you can get your Emission test certificate as long as there is no "Check Engine Light (MIL)" on.
I hope this helps!
Greg in Atlanta |
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| tlhurlbut |
| Wow, Nice Post Gregc. Do you work for the company? Seems like a lot of work for a low battery but that's technology it guss. |
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| dipersp |
| What Greg said. A failed drive time simply means the emissions systems don't have enough data yet. Drive the car for a few days and I'm sure it'll be fine next time around. |
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| afs12065 |
Greg's post RE: drive cycles and OBD2 is correct.
Had this problem with another vehicle after having an O2 sensor replaced which threw a check engine light. When they reset the computer it wouldn't pass emissions only because it doesn't have enough data to report and it won't pass the "readiness" test. This also happens if the battery is completely drained. If you're due for inspection some states will issue a temporary extension so you can go through enough drive cycles to get all of the checks in the OBD2 system "ready."
If you drive your vehicle normally for a few days - completing a few drive cycles you should be okay. In my previous car they recommended 5 complete cycles. In that car a drive cycle essentially consisted of starting the engine cold, driving it to operating temperature and then letting it cool completely before re-starting. Sounds like Honda/Acura is a bit different (every car is) so follow Greg's instructions and you should be good to go (unless of course there is a real problem that needs to be resolved). |
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