OBD/Readiness Driving Procedure
Thread Starter
Teching In
Joined: Nov 2003
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From: Hamilton, NJ
OBD/Readiness Driving Procedure I had the battery out of the car all winter, went to state inspection on Wednesday and failed. Catalytic Converter, Secondary Air Injection, Evaporator System failed the readiness test. I drove the car about 40 miles and they still show “not ready”. Anyone know what the OBD/Readiness Driving Procedure is for a 99 C5?
Thanks!
Thanks!
TECH Addict
Joined: Jun 2002
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From: Las Vegas, NV
Some of the tests complete quickly, a few of them take a couple hundred miles. I'm sure my f-body is similar to your C5. You just needed to drive your car longer. If you had a scanner like EASE, you could hook it up and know exactly where you stand.
Thread Starter
Teching In
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From: Hamilton, NJ
Originally Posted by Predator
Some of the tests complete quickly, a few of them take a couple hundred miles. I'm sure my f-body is similar to your C5. You just needed to drive your car longer. If you had a scanner like EASE, you could hook it up and know exactly where you stand.
and checking 
On The Tree
Joined: Sep 2004
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From: San Diego, CA
Originally Posted by stone crusher
I had the battery out of the car all winter, went to state inspection on Wednesday and failed. Catalytic Converter, Secondary Air Injection, Evaporator System failed the readiness test. I drove the car about 40 miles and they still show “not ready”. Anyone know what the OBD/Readiness Driving Procedure is for a 99 C5?
Thanks!
Thanks!
you can make it a cold start by removing the coolant temp sensor plug wire and air intake temp sensor wire, let the car run for a minute then plug the coolant temp back in and the air temp sensor, then the car sees that it is warmed up and ready to go.
To make the stuff pass just follow this...
You can force them to do the tests here is the list:
For cats to clear the test,
start at idle while engine hot, and accellerate at 3/4 throttle to 55-60 miles an hour than cruise steady at 55 miles an hour for 7 minutes. Do this three times
for the evap to clear :
drive down the highway at 60 mph for 6 minutes, then let off gas and decell with NO BRAKE down to 20 miles per hour then do it again same pattern.
For the evap system:
can only be done after the oxygen and cats monitors have completed,
Intake air temp is within 7 degrees of engine coolant temp,
Cold start engine coolant temp is < 50 degrees celsius, \
Turn on air conditioning and rear defrost on, idle for 2.5 minutes in drive. Before preceding turn accessories off.
Acceleration to 55 miles an hour at 1/2 throttle air conditioning off.
3 minutes steady state cruise 55 then 60 miles per hour, then decellerate to 20 mpr with no brake.
then accerate at 3/4 throttle to 55 again for 5 minutes
then decellerate with no brake. then that test will pass when this is done.
Air injection test needs a cold start , air conditioning on, rear defrost on, and idle for 2.5 minutes in Drive. before proceeding turn all accessorsy off, then drive 55 mph for 3 minutes and it will pass
To make the stuff pass just follow this...
You can force them to do the tests here is the list:
For cats to clear the test,
start at idle while engine hot, and accellerate at 3/4 throttle to 55-60 miles an hour than cruise steady at 55 miles an hour for 7 minutes. Do this three times
for the evap to clear :
drive down the highway at 60 mph for 6 minutes, then let off gas and decell with NO BRAKE down to 20 miles per hour then do it again same pattern.
For the evap system:
can only be done after the oxygen and cats monitors have completed,
Intake air temp is within 7 degrees of engine coolant temp,
Cold start engine coolant temp is < 50 degrees celsius, \
Turn on air conditioning and rear defrost on, idle for 2.5 minutes in drive. Before preceding turn accessories off.
Acceleration to 55 miles an hour at 1/2 throttle air conditioning off.
3 minutes steady state cruise 55 then 60 miles per hour, then decellerate to 20 mpr with no brake.
then accerate at 3/4 throttle to 55 again for 5 minutes
then decellerate with no brake. then that test will pass when this is done.
Air injection test needs a cold start , air conditioning on, rear defrost on, and idle for 2.5 minutes in Drive. before proceeding turn all accessorsy off, then drive 55 mph for 3 minutes and it will pass
I thought someone here said they don't fail you if the readiness tests aren't complete, you just have to come back ?
https://ls1tech.com/forums/midwestern-members/287724-another-emissions-question.html
https://ls1tech.com/forums/midwestern-members/287724-another-emissions-question.html
Originally Posted by SLPSS01
I thought someone here said they don't fail you if the readiness tests aren't complete, you just have to come back ?
https://ls1tech.com/forums/showthread.php?t=287724
https://ls1tech.com/forums/showthread.php?t=287724
In Ga. you do fail for readiness monitors not being set but have 30 days to get them set and recieve 1 free retest. Here you can have 1 not ready for 01 & up cars and 2 not readys for 00 and older cars and still pass.
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Thread Starter
Teching In
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From: Hamilton, NJ
Originally Posted by CrazeD_SS
Keep in mind that some of the tests only run after a cold start.
Catalytic Converter
Secondary Air Injection
Evaporator System
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Verdad Gallardo Thread Starter
Teching In
Joined: Nov 2003
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From: Hamilton, NJ
Originally Posted by ss rally red
In Ga. you do fail for readiness monitors not being set but have 30 days to get them set and recieve 1 free retest. Here you can have 1 not ready for 01 & up cars and 2 not readys for 00 and older cars and still pass.
Thread Starter
Teching In
Joined: Nov 2003
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From: Hamilton, NJ
Originally Posted by wait4me
you can make it a cold start by removing the coolant temp sensor plug wire and air intake temp sensor wire, let the car run for a minute then plug the coolant temp back in and the air temp sensor, then the car sees that it is warmed up and ready to go.
To make the stuff pass just follow this...
You can force them to do the tests here is the list:
For cats to clear the test,
start at idle while engine hot, and accellerate at 3/4 throttle to 55-60 miles an hour than cruise steady at 55 miles an hour for 7 minutes. Do this three times
for the evap to clear :
drive down the highway at 60 mph for 6 minutes, then let off gas and decell with NO BRAKE down to 20 miles per hour then do it again same pattern.
For the evap system:
can only be done after the oxygen and cats monitors have completed,
Intake air temp is within 7 degrees of engine coolant temp,
Cold start engine coolant temp is < 50 degrees celsius, \
Turn on air conditioning and rear defrost on, idle for 2.5 minutes in drive. Before preceding turn accessories off.
Acceleration to 55 miles an hour at 1/2 throttle air conditioning off.
3 minutes steady state cruise 55 then 60 miles per hour, then decellerate to 20 mpr with no brake.
then accerate at 3/4 throttle to 55 again for 5 minutes
then decellerate with no brake. then that test will pass when this is done.
Air injection test needs a cold start , air conditioning on, rear defrost on, and idle for 2.5 minutes in Drive. before proceeding turn all accessorsy off, then drive 55 mph for 3 minutes and it will pass
To make the stuff pass just follow this...
You can force them to do the tests here is the list:
For cats to clear the test,
start at idle while engine hot, and accellerate at 3/4 throttle to 55-60 miles an hour than cruise steady at 55 miles an hour for 7 minutes. Do this three times
for the evap to clear :
drive down the highway at 60 mph for 6 minutes, then let off gas and decell with NO BRAKE down to 20 miles per hour then do it again same pattern.
For the evap system:
can only be done after the oxygen and cats monitors have completed,
Intake air temp is within 7 degrees of engine coolant temp,
Cold start engine coolant temp is < 50 degrees celsius, \
Turn on air conditioning and rear defrost on, idle for 2.5 minutes in drive. Before preceding turn accessories off.
Acceleration to 55 miles an hour at 1/2 throttle air conditioning off.
3 minutes steady state cruise 55 then 60 miles per hour, then decellerate to 20 mpr with no brake.
then accerate at 3/4 throttle to 55 again for 5 minutes
then decellerate with no brake. then that test will pass when this is done.
Air injection test needs a cold start , air conditioning on, rear defrost on, and idle for 2.5 minutes in Drive. before proceeding turn all accessorsy off, then drive 55 mph for 3 minutes and it will pass
start at idle while engine hot, and accellerate at 3/4 throttle to 55-60 miles an hour than cruise steady at 55 miles an hour for 7 minutes. Do this three times.
When I do this do I need to shut the car down in between the three runs?
Thanks, keep you posted
Last edited by stone crusher; Mar 29, 2005 at 06:58 PM.
i know its an old thread, but here is a graphic of the procedure from ALLDATA for anyone doing a search. i looked it up under my F-body, but i assume the procedure is the same for any OBD-II cars.
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From: reading,pa
no it wouldnt be the same for all obd2 cars because some got some weird stuff you have to do to run some of the monitors
My recomendation to avoid the above problem is to leave the battery in the car and hook up a Battery tender which constantly cycles the battery. I use one on my Harley and even the garden tractor to keep the batteries fully charged during the winter. It will pay for it's self. The battery in my tractor is 7 years old.
Re'
Re'
TECH Enthusiast
Joined: Oct 2002
Posts: 571
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From: NJ
This is such perfect timing, was gonna try and search for this but here it is!! And while I"m posting here, may as well ask the pcm techies...:
I have my car in OLSD in process of tuning (ie cat over temp disabled, etc)... What needs to be active in order to pass all the readiness tests when they scan OBDII?
I'm wondering if I should go back to my old predator tune where everything was on (cats, o2, maf, etc) and then go back to OLSD when passed?
I have my car in OLSD in process of tuning (ie cat over temp disabled, etc)... What needs to be active in order to pass all the readiness tests when they scan OBDII?
I'm wondering if I should go back to my old predator tune where everything was on (cats, o2, maf, etc) and then go back to OLSD when passed?
9 Second Club
Joined: Feb 2002
Posts: 2,252
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From: Tampa, FL
Back from the dead again. I have 2000 silhouette that won't come back at all. I had not seen the cat not ready procedure before so I am off to burn some more gas.
This is absolutely ridiculous what we have to do to pass inspection. Yes the battery was disconnected for 15 minutes.
I am guessing the three times have to be consecutive? Or can it be done over three days?
This is absolutely ridiculous what we have to do to pass inspection. Yes the battery was disconnected for 15 minutes.
I am guessing the three times have to be consecutive? Or can it be done over three days?