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Autos - Cars > Nissan - Maxima > Re: Drive Cycle...
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Re: Drive Cycles to Clear ECM Monitors? Am I the Only One?

by George <not.real@[EMAIL PROTECTED] > Dec 14, 2007 at 09:18 PM

> Apparently each car is different and I'm 
> hoping someone here can point me to what they are so I can get them
cleared 
> so I can complete the state inspection.  Thanks for any help. Thanks for
any 
> help.

Your drive pattern should follow guidelines in the 1996 shop manual 
pages EC 47 - EC 50

If you have not yet acquired a manual anywhere, the following may be of 
interest to you. I know I found it interesting, especially the generic 
drive cycle advice at the end.

In New York you should take the emissions test anyway so you get a valid 
sticker, let it test fail, and you get an automatic extension. During 
that 10 day extension period you will certainly accomplish the System 
Readiness tests and avoid tickets for having an expired inspection. I 
hope automatic extensions for a failed test are common everywhere and 
hopefully exist where you live.

The following is from the New York City emissions inspection pamphlet 
titled "What do You Mean, My Car's Not Ready?" Hopefully the EPA parts 
will be applicable anywhere:

"Vehicles perform up to 11 system tests, depending on year, make 
and model of the vehicle. These tests are commonly referred to as 
readiness monitors.

"HOW MANY MONITORS HAVE TO BE READY? 
The US Environmental Protection Agency (EPA) guidelines allow up to two 
monitors to be in a "not ready" state for model year 1996 through 2000 
vehicles and one monitor "not ready" for 2001 and newer model year 
vehicles. 

"WHAT CAUSES A "NOT-READY" RE****T?
Causes of a "not ready" re****t: 
? Recent vehicle repairs in which diagnostic trouble codes have been 
cleared with a OBDII scan tool; or, 
? if the battery had been recently disconnected or replaced; or, 
? if the vehicle's computer requires a software update; or, 
? a pending problem has not yet illuminated the "check engine" light. 

"Negotiate with the inspection station to have a technician perform the 
drive cycles according to manufacturer specific guidelines for a fee you 
will pay. If you take the vehicle from the inspection facility to 
perform the drive cycle yourself, the inspection station operator can 
charge you an emission re-inspection fee, up to the maximum fee allowed 
for an original emission inspection. 

"GENERIC DRIVE CYCLE 
The purpose of the OBDII drive cycle is to run your vehicle's onboard 
diagnostics. This, in turn, allows monitors to operate and detect 
potential malfunctions of your vehicle's emission system. The correct 
drive cycle for your vehicle can vary greatly, depending on the vehicle 
model and the monitors that need to be reset. When a specific drive 
cycle is not known, or drive cycle information is not available from an 
owner's manual, the generic cycle described below may assist with 
resetting your vehicle's monitors. However, this generic cycle may not 
work for all vehicles.

1. 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 each other). 
2. The ignition key must not be left on prior to the cold start - 
otherwise the heated oxygen sensor diagnostic may not run. 
3. As soon as the engine starts, idle the engine in drive for two and 
one-half minutes, with the air conditioning (A/C) and rear defrost 
turned on, if equipped. 
4. Turn the A/C and rear defrost off, and accelerate to 55 mph under 
moderate, constant acceleration. Hold at a steady speed of 55 mph for 
three minutes. 
5. Decelerate (coast down) to 20 mph without braking (or depressing the 
clutch for manual transmissions). 
6. Accelerate again back to 55 to 60 mph. 
7. Hold at a steady speed of 55 to 60 mph for five minutes. Decelerate 
(coast down) to a stop without braking."

-- 
Oil is always 15 years from running out, the oceans are always 10 years
away
from rising 10 feet, and the internet always has only 3 years left before
it
runs out of capacity. Color me skeptical.
 




 18 Posts in Topic:
Drive Cycles to Clear ECM Monitors? Am I the Only One?
"JW" <jweb@[  2007-12-13 09:25:32 
Re: Drive Cycles to Clear ECM Monitors? Am I the Only One?
codifus <codifus@[EMAI  2007-12-13 09:12:57 
Re: Drive Cycles to Clear ECM Monitors? Am I the Only One?
"JW" <jweb@[  2007-12-13 11:36:09 
Re: Drive Cycles to Clear ECM Monitors? Am I the Only One?
AS <donot@[EMAIL PROTE  2007-12-13 12:33:53 
Re: Drive Cycles to Clear ECM Monitors? Am I the Only One?
E Meyer <epmeyer50@[EM  2007-12-13 17:41:20 
Re: Drive Cycles to Clear ECM Monitors? Am I the Only One?
"JW" <jweb@[  2007-12-13 11:43:38 
Re: Drive Cycles to Clear ECM Monitors? Am I the Only One?
"JW" <jweb@[  2007-12-14 16:00:55 
Re: Drive Cycles to Clear ECM Monitors? Am I the Only One?
E Meyer <epmeyer50@[EM  2007-12-14 16:09:27 
Re: Drive Cycles to Clear ECM Monitors? Am I the Only One?
"JW" <jweb@[  2007-12-14 14:52:21 
Re: Drive Cycles to Clear ECM Monitors? Am I the Only One?
George <not.real@[EMAI  2007-12-14 21:18:11 
Re: Drive Cycles to Clear ECM Monitors? Am I the Only One?
"JW" <jweb@[  2007-12-15 14:28:43 
Re: Drive Cycles to Clear ECM Monitors? Am I the Only One?
E Meyer <epmeyer50@[EM  2007-12-16 00:15:39 
Re: Drive Cycles to Clear ECM Monitors? Am I the Only One?
"JW" <jweb@[  2007-12-16 01:43:28 
Re: Drive Cycles to Clear ECM Monitors? Am I the Only One?
Codifus <codifus@[EMAI  2007-12-27 13:51:05 
Re: Drive Cycles to Clear ECM Monitors? Am I the Only One?
E Meyer <epmeyer50@[EM  2007-12-27 19:27:38 
Re: Drive Cycles to Clear ECM Monitors? Am I the Only One?
codifus <codifus@[EMAI  2008-01-02 12:16:11 
Re: Drive Cycles to Clear ECM Monitors? Am I the Only One?
E Meyer <epmeyer50@[EM  2008-01-03 14:43:32 
Re: Drive Cycles to Clear ECM Monitors? Am I the Only One?
common_ sense@[EMAIL PROT  2008-01-04 00:22:23 

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