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Old 12-05-2004, 01:19 PM   #1
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Default What is related to a "drive cycle" on OBD2 cars?

What is related to a "drive cycle" on OBD2 cars?

Smog?
OEM replacement parts?


Let's say you'll need to replace an o2 sensor, would you need to wait for the drive cycle to shut off your CEL for you?
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Old 12-05-2004, 01:54 PM   #2
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Default Re: What is related to a "drive cycle" on OBD2 cars? (Inconclusive)

a drive cycle is usually like probbly 15 min or so of driving around
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Old 12-05-2004, 01:58 PM   #3
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Default Re: What is related to a "drive cycle" on OBD2 cars? (Inconclusive)

Quote:
Originally Posted by Inconclusive
What is related to a "drive cycle" on OBD2 cars?

Smog?
OEM replacement parts?


Let's say you'll need to replace an o2 sensor, would you need to wait for the drive cycle to shut off your CEL for you?
yes, but you can reset the ECU (by removing the fuse) and it will reset the computer. but dont do that and go to emissions because none of your systems have been tested and you will fail.

a drive cycle is a specific list of things that needs to be done for the computer to test all its systems. it involves things like accelerating slowly, quickly, braking, cruising, freeway speeds etc. some can take over 30 minuets to complete.
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Old 12-05-2004, 07:45 PM   #4
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Default Re: What is related to a "drive cycle" on OBD2 cars? (Kamin)

Any other information guys? Thank you by the way.
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Old 12-06-2004, 04:00 AM   #5
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Default Re: What is related to a "drive cycle" on OBD2 cars? (Kamin)

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Originally Posted by Kamin
a drive cycle is a specific list of things that needs to be done for the computer to test all its systems. it involves things like accelerating slowly, quickly, braking, cruising, freeway speeds etc. some can take over 30 minuets to complete.
What you're listing here are really specific things that must happen in order for the ECU to run a monitor test.

A drive cycle is much simpler - ECT needs to start below a certain threshold, rise above a certain level, then fall below the threshold. I'm pretty sure some other sensors need to show some activity as well, such as the VSS (if the car never moved, it would not be considered a drive cycle).
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Old 12-06-2004, 12:00 PM   #6
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Default Re: What is related to a "drive cycle" on OBD2 cars? (EE_Chris)

Quote:
Originally Posted by EE_Chris
What you're listing here are really specific things that must happen in order for the ECU to run a monitor test.

A drive cycle is much simpler - ECT needs to start below a certain threshold, rise above a certain level, then fall below the threshold. I'm pretty sure some other sensors need to show some activity as well, such as the VSS (if the car never moved, it would not be considered a drive cycle).
well there are 2 types of cycles, the standard cycle like you listed and the system readiness cycle.
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