Cal

I have a '97 grand cherokee, inline 6.

I recently got a actron scan tool! (Yippee! I think...) While checking
for stored codes, I found that when listing the IM monitors, the Catalyst
monitor comes back as 'not ready.' The others are either 'ready' or 'not
applicable.' Unfortunately, the handbook gives very little info about the
monitors. From the sound of it, I would guess this to be related to
monitoring the O2 sensors, but I have had no error codes in the computer
that would indicate a problem with them. (Or could it be no error codes
because it is not monitoring them?) I have allowed the engine to reach full
operating temperature, and driven it for about 10 to 15 minutes, and still
get the 'not ready.'
Any ideas, or has anyone had this problem before?
thanks...

cal

Mike Romain

Mechanics are laughing themselves silly with the thought of the average
person having a scan tool!!!
;-)

Likely the catalyst won't be ready until it gets 'really' hot, just a
guess.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Cal wrote:
>
> I have a '97 grand cherokee, inline 6.
>
> I recently got a actron scan tool! (Yippee! I think...) While checking
> for stored codes, I found that when listing the IM monitors, the Catalyst
> monitor comes back as 'not ready.' The others are either 'ready' or 'not
> applicable.' Unfortunately, the handbook gives very little info about the
> monitors. From the sound of it, I would guess this to be related to
> monitoring the O2 sensors, but I have had no error codes in the computer
> that would indicate a problem with them. (Or could it be no error codes
> because it is not monitoring them?) I have allowed the engine to reach full
> operating temperature, and driven it for about 10 to 15 minutes, and still
> get the 'not ready.'
> Any ideas, or has anyone had this problem before?
> thanks...
>
> cal

Mike Romain

Mechanics are laughing themselves silly with the thought of the average
person having a scan tool!!!
;-)

Likely the catalyst won't be ready until it gets 'really' hot, just a
guess.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Cal wrote:
>
> I have a '97 grand cherokee, inline 6.
>
> I recently got a actron scan tool! (Yippee! I think...) While checking
> for stored codes, I found that when listing the IM monitors, the Catalyst
> monitor comes back as 'not ready.' The others are either 'ready' or 'not
> applicable.' Unfortunately, the handbook gives very little info about the
> monitors. From the sound of it, I would guess this to be related to
> monitoring the O2 sensors, but I have had no error codes in the computer
> that would indicate a problem with them. (Or could it be no error codes
> because it is not monitoring them?) I have allowed the engine to reach full
> operating temperature, and driven it for about 10 to 15 minutes, and still
> get the 'not ready.'
> Any ideas, or has anyone had this problem before?
> thanks...
>
> cal

Earle Horton

People who have been to school for electrical engineering or worked in the
computer industry are laughing themselves silly with the thought of the
average mechanic having anything like a scan tool. "Duh, the scan tool
doesn't say anything, so let's try replacing the CPS. Hmm, that didn't do
anything, how about the TPS? Maybe this guy needs a set of plugs or
wires..."

Earle

"Mike Romain" <romainm@sympatico.ca> wrote in message
news:3F610819.79F89D34@sympatico.ca...
> Mechanics are laughing themselves silly with the thought of the average
> person having a scan tool!!!
> ;-)
>
> Likely the catalyst won't be ready until it gets 'really' hot, just a
> guess.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> Cal wrote:
> >
> > I have a '97 grand cherokee, inline 6.
> >
> > I recently got a actron scan tool! (Yippee! I think...) While
checking
> > for stored codes, I found that when listing the IM monitors, the
Catalyst
> > monitor comes back as 'not ready.' The others are either 'ready' or
'not
> > applicable.' Unfortunately, the handbook gives very little info about
the
> > monitors. From the sound of it, I would guess this to be related to
> > monitoring the O2 sensors, but I have had no error codes in the computer
> > that would indicate a problem with them. (Or could it be no error codes
> > because it is not monitoring them?) I have allowed the engine to reach
full
> > operating temperature, and driven it for about 10 to 15 minutes, and
still
> > get the 'not ready.'
> > Any ideas, or has anyone had this problem before?
> > thanks...
> >
> > cal

Earle Horton

People who have been to school for electrical engineering or worked in the
computer industry are laughing themselves silly with the thought of the
average mechanic having anything like a scan tool. "Duh, the scan tool
doesn't say anything, so let's try replacing the CPS. Hmm, that didn't do
anything, how about the TPS? Maybe this guy needs a set of plugs or
wires..."

Earle

"Mike Romain" <romainm@sympatico.ca> wrote in message
news:3F610819.79F89D34@sympatico.ca...
> Mechanics are laughing themselves silly with the thought of the average
> person having a scan tool!!!
> ;-)
>
> Likely the catalyst won't be ready until it gets 'really' hot, just a
> guess.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> Cal wrote:
> >
> > I have a '97 grand cherokee, inline 6.
> >
> > I recently got a actron scan tool! (Yippee! I think...) While
checking
> > for stored codes, I found that when listing the IM monitors, the
Catalyst
> > monitor comes back as 'not ready.' The others are either 'ready' or
'not
> > applicable.' Unfortunately, the handbook gives very little info about
the
> > monitors. From the sound of it, I would guess this to be related to
> > monitoring the O2 sensors, but I have had no error codes in the computer
> > that would indicate a problem with them. (Or could it be no error codes
> > because it is not monitoring them?) I have allowed the engine to reach
full
> > operating temperature, and driven it for about 10 to 15 minutes, and
still
> > get the 'not ready.'
> > Any ideas, or has anyone had this problem before?
> > thanks...
> >
> > cal

Cal

"Mike Romain" <romainm@sympatico.ca> wrote in message
news:3F610819.79F89D34@sympatico.ca...
> Mechanics are laughing themselves silly with the thought of the average
> person having a scan tool!!!
> ;-)
>
> Likely the catalyst won't be ready until it gets 'really' hot, just a
> guess.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
I thought that the O2 sensors would have to get pretty hot for this monitor
to function. (hence, the reason I drove the vehicle to operating temp.
Likely I didn't drive it far enough.) My fear is, in my area, our autos now
have to pass the OBD-II yearly inspection ( this is new for us!). No insult
intended, but many of the guys around here that do these inspections
probably know as little or less than I do. (These inspection stations are
at oil quik change garages, etc.) I would hate to fail one of these
expensive inspections because of my or their lack of knowledge. (Yes, they
did attend a class in order to conduct these inspections. But I refuse to
believe that they can understand these pretty complicated systems with just
a few hours of classes. Certified mechanics undergo much more difficult
training.)
I have had a good bit of luck using this tool with a couple other problems.
I've helped friends diagnose and repair O2 sensors (connection just needed
cleaning), clogged egr valves, and engine missfires. Although the "average
person" probably shouldn't have a scan tool, mine has paid for itself at
least twice. If you don't have a "auto zone" handy for a free scan of
computer codes, then I would recommend someone with a "acceptable knowledge"
of autos to have one. You at least know what questions to ask, and at the
very least it can give you an idea of what a mechanic is trying to sell you
on.

cal

> Cal wrote:
> >
> > I have a '97 grand cherokee, inline 6.
> >
> > I recently got a actron scan tool! (Yippee! I think...) While
checking
> > for stored codes, I found that when listing the IM monitors, the
Catalyst
> > monitor comes back as 'not ready.' The others are either 'ready' or
'not
> > applicable.' Unfortunately, the handbook gives very little info about
the
> > monitors. From the sound of it, I would guess this to be related to
> > monitoring the O2 sensors, but I have had no error codes in the computer
> > that would indicate a problem with them. (Or could it be no error codes
> > because it is not monitoring them?) I have allowed the engine to reach
full
> > operating temperature, and driven it for about 10 to 15 minutes, and
still
> > get the 'not ready.'
> > Any ideas, or has anyone had this problem before?
> > thanks...
> >
> > cal

Cal

"Mike Romain" <romainm@sympatico.ca> wrote in message
news:3F610819.79F89D34@sympatico.ca...
> Mechanics are laughing themselves silly with the thought of the average
> person having a scan tool!!!
> ;-)
>
> Likely the catalyst won't be ready until it gets 'really' hot, just a
> guess.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
I thought that the O2 sensors would have to get pretty hot for this monitor
to function. (hence, the reason I drove the vehicle to operating temp.
Likely I didn't drive it far enough.) My fear is, in my area, our autos now
have to pass the OBD-II yearly inspection ( this is new for us!). No insult
intended, but many of the guys around here that do these inspections
probably know as little or less than I do. (These inspection stations are
at oil quik change garages, etc.) I would hate to fail one of these
expensive inspections because of my or their lack of knowledge. (Yes, they
did attend a class in order to conduct these inspections. But I refuse to
believe that they can understand these pretty complicated systems with just
a few hours of classes. Certified mechanics undergo much more difficult
training.)
I have had a good bit of luck using this tool with a couple other problems.
I've helped friends diagnose and repair O2 sensors (connection just needed
cleaning), clogged egr valves, and engine missfires. Although the "average
person" probably shouldn't have a scan tool, mine has paid for itself at
least twice. If you don't have a "auto zone" handy for a free scan of
computer codes, then I would recommend someone with a "acceptable knowledge"
of autos to have one. You at least know what questions to ask, and at the
very least it can give you an idea of what a mechanic is trying to sell you
on.

cal

> Cal wrote:
> >
> > I have a '97 grand cherokee, inline 6.
> >
> > I recently got a actron scan tool! (Yippee! I think...) While
checking
> > for stored codes, I found that when listing the IM monitors, the
Catalyst
> > monitor comes back as 'not ready.' The others are either 'ready' or
'not
> > applicable.' Unfortunately, the handbook gives very little info about
the
> > monitors. From the sound of it, I would guess this to be related to
> > monitoring the O2 sensors, but I have had no error codes in the computer
> > that would indicate a problem with them. (Or could it be no error codes
> > because it is not monitoring them?) I have allowed the engine to reach
full
> > operating temperature, and driven it for about 10 to 15 minutes, and
still
> > get the 'not ready.'
> > Any ideas, or has anyone had this problem before?
> > thanks...
> >
> > cal

A.H. MacIntosh aka USERNAME

if it runs, and passed the sniffers... what does it matter?
"Cal" <codom1@triad.rr.com> wrote in message
news:ow78b.24644$AU.1224934@twister.southeast.rr.c om...
> I have a '97 grand cherokee, inline 6.
>
> I recently got a actron scan tool! (Yippee! I think...) While checking
> for stored codes, I found that when listing the IM monitors, the Catalyst
> monitor comes back as 'not ready.' The others are either 'ready' or 'not
> applicable.' Unfortunately, the handbook gives very little info about the
> monitors. From the sound of it, I would guess this to be related to
> monitoring the O2 sensors, but I have had no error codes in the computer
> that would indicate a problem with them. (Or could it be no error codes
> because it is not monitoring them?) I have allowed the engine to reach
full
> operating temperature, and driven it for about 10 to 15 minutes, and still
> get the 'not ready.'
> Any ideas, or has anyone had this problem before?
> thanks...
>
> cal
>
>

A.H. MacIntosh aka USERNAME

if it runs, and passed the sniffers... what does it matter?
"Cal" <codom1@triad.rr.com> wrote in message
news:ow78b.24644$AU.1224934@twister.southeast.rr.c om...
> I have a '97 grand cherokee, inline 6.
>
> I recently got a actron scan tool! (Yippee! I think...) While checking
> for stored codes, I found that when listing the IM monitors, the Catalyst
> monitor comes back as 'not ready.' The others are either 'ready' or 'not
> applicable.' Unfortunately, the handbook gives very little info about the
> monitors. From the sound of it, I would guess this to be related to
> monitoring the O2 sensors, but I have had no error codes in the computer
> that would indicate a problem with them. (Or could it be no error codes
> because it is not monitoring them?) I have allowed the engine to reach
full
> operating temperature, and driven it for about 10 to 15 minutes, and still
> get the 'not ready.'
> Any ideas, or has anyone had this problem before?
> thanks...
>
> cal
>
>

Mike Romain

That sounds about right too Earle...

If the computer don't tell them, they are lost these days...

Mike

Earle Horton wrote:
>
> People who have been to school for electrical engineering or worked in the
> computer industry are laughing themselves silly with the thought of the
> average mechanic having anything like a scan tool. "Duh, the scan tool
> doesn't say anything, so let's try replacing the CPS. Hmm, that didn't do
> anything, how about the TPS? Maybe this guy needs a set of plugs or
> wires..."
>
> Earle
>
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:3F610819.79F89D34@sympatico.ca...
> > Mechanics are laughing themselves silly with the thought of the average
> > person having a scan tool!!!
> > ;-)
> >
> > Likely the catalyst won't be ready until it gets 'really' hot, just a
> > guess.
> >
> > Mike
> > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > 88 Cherokee 235 BFG AT's
> >
> > Cal wrote:
> > >
> > > I have a '97 grand cherokee, inline 6.
> > >
> > > I recently got a actron scan tool! (Yippee! I think...) While
> checking
> > > for stored codes, I found that when listing the IM monitors, the
> Catalyst
> > > monitor comes back as 'not ready.' The others are either 'ready' or
> 'not
> > > applicable.' Unfortunately, the handbook gives very little info about
> the
> > > monitors. From the sound of it, I would guess this to be related to
> > > monitoring the O2 sensors, but I have had no error codes in the computer
> > > that would indicate a problem with them. (Or could it be no error codes
> > > because it is not monitoring them?) I have allowed the engine to reach
> full
> > > operating temperature, and driven it for about 10 to 15 minutes, and
> still
> > > get the 'not ready.'
> > > Any ideas, or has anyone had this problem before?
> > > thanks...
> > >
> > > cal