Check Engine Codes for 2002 Cherokee Sport
 

How do you check the diagnostic codes on this model vehicle? It's a 02
Cherokee Sport with the 4.0L and auto transmission. I assumed I could check
it the same way as I do my 91 YJ 4.0L by running the engine to 2500 rpm,
letting the rpm drop and turning the ignition off, then on, then off, and
back on and waiting for the Check Engine light to flash out the number
pairs, but it don't work that way.

Help appreciated.
Scott

Re: Check Engine Codes for 2002 Cherokee Sport
 

Retrieving codes: Turn the ignition key until the digital odometer
displays, repeat three times in succession and then back to "On"
(On/Off, On/Off, On/Off, On). At the fourth "On" the odometer will be
replaced with codes. If no codes are present then "Done" will appear.
Codes: http://www.wjjeeps.com/faultcodes.htm Example:
http://www.----------.com/faultCode.mpg
God Bless America, Bill O|||||||O
mailto:--------------------

reconair wrote:
>
> How do you check the diagnostic codes on this model vehicle? It's a 02
> Cherokee Sport with the 4.0L and auto transmission. I assumed I could check
> it the same way as I do my 91 YJ 4.0L by running the engine to 2500 rpm,
> letting the rpm drop and turning the ignition off, then on, then off, and
> back on and waiting for the Check Engine light to flash out the number
> pairs, but it don't work that way.
>
> Help appreciated.
> Scott

Re: Check Engine Codes for 2002 Cherokee Sport
 

Retrieving codes: Turn the ignition key until the digital odometer
displays, repeat three times in succession and then back to "On"
(On/Off, On/Off, On/Off, On). At the fourth "On" the odometer will be
replaced with codes. If no codes are present then "Done" will appear.
Codes: http://www.wjjeeps.com/faultcodes.htm Example:
http://www.----------.com/faultCode.mpg
God Bless America, Bill O|||||||O
mailto:--------------------

reconair wrote:
>
> How do you check the diagnostic codes on this model vehicle? It's a 02
> Cherokee Sport with the 4.0L and auto transmission. I assumed I could check
> it the same way as I do my 91 YJ 4.0L by running the engine to 2500 rpm,
> letting the rpm drop and turning the ignition off, then on, then off, and
> back on and waiting for the Check Engine light to flash out the number
> pairs, but it don't work that way.
>
> Help appreciated.
> Scott

Re: Check Engine Codes for 2002 Cherokee Sport
 

Retrieving codes: Turn the ignition key until the digital odometer
displays, repeat three times in succession and then back to "On"
(On/Off, On/Off, On/Off, On). At the fourth "On" the odometer will be
replaced with codes. If no codes are present then "Done" will appear.
Codes: http://www.wjjeeps.com/faultcodes.htm Example:
http://www.----------.com/faultCode.mpg
God Bless America, Bill O|||||||O
mailto:--------------------

reconair wrote:
>
> How do you check the diagnostic codes on this model vehicle? It's a 02
> Cherokee Sport with the 4.0L and auto transmission. I assumed I could check
> it the same way as I do my 91 YJ 4.0L by running the engine to 2500 rpm,
> letting the rpm drop and turning the ignition off, then on, then off, and
> back on and waiting for the Check Engine light to flash out the number
> pairs, but it don't work that way.
>
> Help appreciated.
> Scott

Re: Check Engine Codes for 2002 Cherokee Sport
 

Bill,

I tried as you suggested, but the odometer does not change off of the
milege reading. On the 4th on, all that is shown is the milege. I assume
that the 1st "on" is engine start then off, on/off, on/off, on. I also
tried an additional on/off/on, but no change.

Scott
"L.W. ("ßill") ------ III" <----------@cox.net> wrote in message
news:43CDA3BB.35FBAB18@cox.net...
> Retrieving codes: Turn the ignition key until the digital odometer
> displays, repeat three times in succession and then back to "On"
> (On/Off, On/Off, On/Off, On). At the fourth "On" the odometer will be
> replaced with codes. If no codes are present then "Done" will appear.
> Codes: http://www.wjjeeps.com/faultcodes.htm Example:
> http://www.----------.com/faultCode.mpg
> God Bless America, Bill O|||||||O
> mailto:--------------------
>
> reconair wrote:
>>
>> How do you check the diagnostic codes on this model vehicle? It's a 02
>> Cherokee Sport with the 4.0L and auto transmission. I assumed I could
>> check
>> it the same way as I do my 91 YJ 4.0L by running the engine to 2500 rpm,
>> letting the rpm drop and turning the ignition off, then on, then off, and
>> back on and waiting for the Check Engine light to flash out the number
>> pairs, but it don't work that way.
>>
>> Help appreciated.
>> Scott

Re: Check Engine Codes for 2002 Cherokee Sport
 

Bill,

I tried as you suggested, but the odometer does not change off of the
milege reading. On the 4th on, all that is shown is the milege. I assume
that the 1st "on" is engine start then off, on/off, on/off, on. I also
tried an additional on/off/on, but no change.

Scott
"L.W. ("ßill") ------ III" <----------@cox.net> wrote in message
news:43CDA3BB.35FBAB18@cox.net...
> Retrieving codes: Turn the ignition key until the digital odometer
> displays, repeat three times in succession and then back to "On"
> (On/Off, On/Off, On/Off, On). At the fourth "On" the odometer will be
> replaced with codes. If no codes are present then "Done" will appear.
> Codes: http://www.wjjeeps.com/faultcodes.htm Example:
> http://www.----------.com/faultCode.mpg
> God Bless America, Bill O|||||||O
> mailto:--------------------
>
> reconair wrote:
>>
>> How do you check the diagnostic codes on this model vehicle? It's a 02
>> Cherokee Sport with the 4.0L and auto transmission. I assumed I could
>> check
>> it the same way as I do my 91 YJ 4.0L by running the engine to 2500 rpm,
>> letting the rpm drop and turning the ignition off, then on, then off, and
>> back on and waiting for the Check Engine light to flash out the number
>> pairs, but it don't work that way.
>>
>> Help appreciated.
>> Scott

Re: Check Engine Codes for 2002 Cherokee Sport
 

Bill,

I tried as you suggested, but the odometer does not change off of the
milege reading. On the 4th on, all that is shown is the milege. I assume
that the 1st "on" is engine start then off, on/off, on/off, on. I also
tried an additional on/off/on, but no change.

Scott
"L.W. ("ßill") ------ III" <----------@cox.net> wrote in message
news:43CDA3BB.35FBAB18@cox.net...
> Retrieving codes: Turn the ignition key until the digital odometer
> displays, repeat three times in succession and then back to "On"
> (On/Off, On/Off, On/Off, On). At the fourth "On" the odometer will be
> replaced with codes. If no codes are present then "Done" will appear.
> Codes: http://www.wjjeeps.com/faultcodes.htm Example:
> http://www.----------.com/faultCode.mpg
> God Bless America, Bill O|||||||O
> mailto:--------------------
>
> reconair wrote:
>>
>> How do you check the diagnostic codes on this model vehicle? It's a 02
>> Cherokee Sport with the 4.0L and auto transmission. I assumed I could
>> check
>> it the same way as I do my 91 YJ 4.0L by running the engine to 2500 rpm,
>> letting the rpm drop and turning the ignition off, then on, then off, and
>> back on and waiting for the Check Engine light to flash out the number
>> pairs, but it don't work that way.
>>
>> Help appreciated.
>> Scott

Re: Check Engine Codes for 2002 Cherokee Sport
 

Do not use the engine starter position. And I always have the door
open as I can't fit in a Cherokee.
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/

reconair wrote:
>
> Bill,
>
> I tried as you suggested, but the odometer does not change off of the
> milege reading. On the 4th on, all that is shown is the milege. I assume
> that the 1st "on" is engine start then off, on/off, on/off, on. I also
> tried an additional on/off/on, but no change.

Re: Check Engine Codes for 2002 Cherokee Sport
 

Do not use the engine starter position. And I always have the door
open as I can't fit in a Cherokee.
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/

reconair wrote:
>
> Bill,
>
> I tried as you suggested, but the odometer does not change off of the
> milege reading. On the 4th on, all that is shown is the milege. I assume
> that the 1st "on" is engine start then off, on/off, on/off, on. I also
> tried an additional on/off/on, but no change.

Re: Check Engine Codes for 2002 Cherokee Sport
 

Do not use the engine starter position. And I always have the door
open as I can't fit in a Cherokee.
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/

reconair wrote:
>
> Bill,
>
> I tried as you suggested, but the odometer does not change off of the
> milege reading. On the 4th on, all that is shown is the milege. I assume
> that the 1st "on" is engine start then off, on/off, on/off, on. I also
> tried an additional on/off/on, but no change.

Re: Check Engine Codes for 2002 Cherokee Sport
 

Scott - you do this with the engine off, not running at all. It has the
codes already stored up in the computer and all you are doing is invoking it
to display them. I suspect Bill copied the stuff below from somewhere, but
I remember only needing to do it 3 times, and at a regular cadence.
Tomes
02 TJ

"reconair" <reconair@staffnet.com> wrote in message
news:11srcdrld34t206@corp.supernews.com...
> Bill,
>
> I tried as you suggested, but the odometer does not change off of the
> milege reading. On the 4th on, all that is shown is the milege. I assume
> that the 1st "on" is engine start then off, on/off, on/off, on. I also
> tried an additional on/off/on, but no change.
>
> Scott
> "L.W. ("ßill") ------ III" <----------@cox.net> wrote in message
> news:43CDA3BB.35FBAB18@cox.net...
>> Retrieving codes: Turn the ignition key until the digital odometer
>> displays, repeat three times in succession and then back to "On"
>> (On/Off, On/Off, On/Off, On). At the fourth "On" the odometer will be
>> replaced with codes. If no codes are present then "Done" will appear.
>> Codes: http://www.wjjeeps.com/faultcodes.htm Example:
>> http://www.----------.com/faultCode.mpg
>> God Bless America, Bill O|||||||O
>> mailto:--------------------
>>
>> reconair wrote:
>>>
>>> How do you check the diagnostic codes on this model vehicle? It's a 02
>>> Cherokee Sport with the 4.0L and auto transmission. I assumed I could
>>> check
>>> it the same way as I do my 91 YJ 4.0L by running the engine to 2500 rpm,
>>> letting the rpm drop and turning the ignition off, then on, then off,
>>> and
>>> back on and waiting for the Check Engine light to flash out the number
>>> pairs, but it don't work that way.
>>>
>>> Help appreciated.
>>> Scott
>
>

Re: Check Engine Codes for 2002 Cherokee Sport
 

Scott - you do this with the engine off, not running at all. It has the
codes already stored up in the computer and all you are doing is invoking it
to display them. I suspect Bill copied the stuff below from somewhere, but
I remember only needing to do it 3 times, and at a regular cadence.
Tomes
02 TJ

"reconair" <reconair@staffnet.com> wrote in message
news:11srcdrld34t206@corp.supernews.com...
> Bill,
>
> I tried as you suggested, but the odometer does not change off of the
> milege reading. On the 4th on, all that is shown is the milege. I assume
> that the 1st "on" is engine start then off, on/off, on/off, on. I also
> tried an additional on/off/on, but no change.
>
> Scott
> "L.W. ("ßill") ------ III" <----------@cox.net> wrote in message
> news:43CDA3BB.35FBAB18@cox.net...
>> Retrieving codes: Turn the ignition key until the digital odometer
>> displays, repeat three times in succession and then back to "On"
>> (On/Off, On/Off, On/Off, On). At the fourth "On" the odometer will be
>> replaced with codes. If no codes are present then "Done" will appear.
>> Codes: http://www.wjjeeps.com/faultcodes.htm Example:
>> http://www.----------.com/faultCode.mpg
>> God Bless America, Bill O|||||||O
>> mailto:--------------------
>>
>> reconair wrote:
>>>
>>> How do you check the diagnostic codes on this model vehicle? It's a 02
>>> Cherokee Sport with the 4.0L and auto transmission. I assumed I could
>>> check
>>> it the same way as I do my 91 YJ 4.0L by running the engine to 2500 rpm,
>>> letting the rpm drop and turning the ignition off, then on, then off,
>>> and
>>> back on and waiting for the Check Engine light to flash out the number
>>> pairs, but it don't work that way.
>>>
>>> Help appreciated.
>>> Scott
>
>

Re: Check Engine Codes for 2002 Cherokee Sport
 

Scott - you do this with the engine off, not running at all. It has the
codes already stored up in the computer and all you are doing is invoking it
to display them. I suspect Bill copied the stuff below from somewhere, but
I remember only needing to do it 3 times, and at a regular cadence.
Tomes
02 TJ

"reconair" <reconair@staffnet.com> wrote in message
news:11srcdrld34t206@corp.supernews.com...
> Bill,
>
> I tried as you suggested, but the odometer does not change off of the
> milege reading. On the 4th on, all that is shown is the milege. I assume
> that the 1st "on" is engine start then off, on/off, on/off, on. I also
> tried an additional on/off/on, but no change.
>
> Scott
> "L.W. ("ßill") ------ III" <----------@cox.net> wrote in message
> news:43CDA3BB.35FBAB18@cox.net...
>> Retrieving codes: Turn the ignition key until the digital odometer
>> displays, repeat three times in succession and then back to "On"
>> (On/Off, On/Off, On/Off, On). At the fourth "On" the odometer will be
>> replaced with codes. If no codes are present then "Done" will appear.
>> Codes: http://www.wjjeeps.com/faultcodes.htm Example:
>> http://www.----------.com/faultCode.mpg
>> God Bless America, Bill O|||||||O
>> mailto:--------------------
>>
>> reconair wrote:
>>>
>>> How do you check the diagnostic codes on this model vehicle? It's a 02
>>> Cherokee Sport with the 4.0L and auto transmission. I assumed I could
>>> check
>>> it the same way as I do my 91 YJ 4.0L by running the engine to 2500 rpm,
>>> letting the rpm drop and turning the ignition off, then on, then off,
>>> and
>>> back on and waiting for the Check Engine light to flash out the number
>>> pairs, but it don't work that way.
>>>
>>> Help appreciated.
>>> Scott
>
>

Re: Check Engine Codes for 2002 Cherokee Sport
 

Do not start the engine just switch between the off and ignition on (but
starter not engaged) as described at:
http://www.wjjeeps.com/faultcodes.htm

Or you can rent/borrow a code reader from your corner auto-parts store

Retrieving codes:
Turn the ignition key until the digital odometer displays, repeat three
times in succession and then back to "On" (On/Off, On/Off, On/Off, On). At
the fourth "On" the odometer will be replaced with codes. If no codes are
present then "Done" will appear.



The explanation for the codes is also available at:
http://www.wjjeeps.com/faultcodes.htm





"reconair" <reconair@staffnet.com> wrote in message
news:11srcdrld34t206@corp.supernews.com...
> Bill,
>
> I tried as you suggested, but the odometer does not change off of the
> milege reading. On the 4th on, all that is shown is the milege. I assume
> that the 1st "on" is engine start then off, on/off, on/off, on. I also
> tried an additional on/off/on, but no change.
>
> Scott
> "L.W. ("ßill") ------ III" <----------@cox.net> wrote in message
> news:43CDA3BB.35FBAB18@cox.net...
>> Retrieving codes: Turn the ignition key until the digital odometer
>> displays, repeat three times in succession and then back to "On"
>> (On/Off, On/Off, On/Off, On). At the fourth "On" the odometer will be
>> replaced with codes. If no codes are present then "Done" will appear.
>> Codes: http://www.wjjeeps.com/faultcodes.htm Example:
>> http://www.----------.com/faultCode.mpg
>> God Bless America, Bill O|||||||O
>> mailto:--------------------
>>
>> reconair wrote:
>>>
>>> How do you check the diagnostic codes on this model vehicle? It's a 02
>>> Cherokee Sport with the 4.0L and auto transmission. I assumed I could
>>> check
>>> it the same way as I do my 91 YJ 4.0L by running the engine to 2500 rpm,
>>> letting the rpm drop and turning the ignition off, then on, then off,
>>> and
>>> back on and waiting for the Check Engine light to flash out the number
>>> pairs, but it don't work that way.
>>>
>>> Help appreciated.
>>> Scott
>
>

Re: Check Engine Codes for 2002 Cherokee Sport
 

Do not start the engine just switch between the off and ignition on (but
starter not engaged) as described at:
http://www.wjjeeps.com/faultcodes.htm

Or you can rent/borrow a code reader from your corner auto-parts store

Retrieving codes:
Turn the ignition key until the digital odometer displays, repeat three
times in succession and then back to "On" (On/Off, On/Off, On/Off, On). At
the fourth "On" the odometer will be replaced with codes. If no codes are
present then "Done" will appear.



The explanation for the codes is also available at:
http://www.wjjeeps.com/faultcodes.htm





"reconair" <reconair@staffnet.com> wrote in message
news:11srcdrld34t206@corp.supernews.com...
> Bill,
>
> I tried as you suggested, but the odometer does not change off of the
> milege reading. On the 4th on, all that is shown is the milege. I assume
> that the 1st "on" is engine start then off, on/off, on/off, on. I also
> tried an additional on/off/on, but no change.
>
> Scott
> "L.W. ("ßill") ------ III" <----------@cox.net> wrote in message
> news:43CDA3BB.35FBAB18@cox.net...
>> Retrieving codes: Turn the ignition key until the digital odometer
>> displays, repeat three times in succession and then back to "On"
>> (On/Off, On/Off, On/Off, On). At the fourth "On" the odometer will be
>> replaced with codes. If no codes are present then "Done" will appear.
>> Codes: http://www.wjjeeps.com/faultcodes.htm Example:
>> http://www.----------.com/faultCode.mpg
>> God Bless America, Bill O|||||||O
>> mailto:--------------------
>>
>> reconair wrote:
>>>
>>> How do you check the diagnostic codes on this model vehicle? It's a 02
>>> Cherokee Sport with the 4.0L and auto transmission. I assumed I could
>>> check
>>> it the same way as I do my 91 YJ 4.0L by running the engine to 2500 rpm,
>>> letting the rpm drop and turning the ignition off, then on, then off,
>>> and
>>> back on and waiting for the Check Engine light to flash out the number
>>> pairs, but it don't work that way.
>>>
>>> Help appreciated.
>>> Scott
>
>

Re: Check Engine Codes for 2002 Cherokee Sport
 

Do not start the engine just switch between the off and ignition on (but
starter not engaged) as described at:
http://www.wjjeeps.com/faultcodes.htm

Or you can rent/borrow a code reader from your corner auto-parts store

Retrieving codes:
Turn the ignition key until the digital odometer displays, repeat three
times in succession and then back to "On" (On/Off, On/Off, On/Off, On). At
the fourth "On" the odometer will be replaced with codes. If no codes are
present then "Done" will appear.



The explanation for the codes is also available at:
http://www.wjjeeps.com/faultcodes.htm





"reconair" <reconair@staffnet.com> wrote in message
news:11srcdrld34t206@corp.supernews.com...
> Bill,
>
> I tried as you suggested, but the odometer does not change off of the
> milege reading. On the 4th on, all that is shown is the milege. I assume
> that the 1st "on" is engine start then off, on/off, on/off, on. I also
> tried an additional on/off/on, but no change.
>
> Scott
> "L.W. ("ßill") ------ III" <----------@cox.net> wrote in message
> news:43CDA3BB.35FBAB18@cox.net...
>> Retrieving codes: Turn the ignition key until the digital odometer
>> displays, repeat three times in succession and then back to "On"
>> (On/Off, On/Off, On/Off, On). At the fourth "On" the odometer will be
>> replaced with codes. If no codes are present then "Done" will appear.
>> Codes: http://www.wjjeeps.com/faultcodes.htm Example:
>> http://www.----------.com/faultCode.mpg
>> God Bless America, Bill O|||||||O
>> mailto:--------------------
>>
>> reconair wrote:
>>>
>>> How do you check the diagnostic codes on this model vehicle? It's a 02
>>> Cherokee Sport with the 4.0L and auto transmission. I assumed I could
>>> check
>>> it the same way as I do my 91 YJ 4.0L by running the engine to 2500 rpm,
>>> letting the rpm drop and turning the ignition off, then on, then off,
>>> and
>>> back on and waiting for the Check Engine light to flash out the number
>>> pairs, but it don't work that way.
>>>
>>> Help appreciated.
>>> Scott
>
>

Re: Check Engine Codes for 2002 Cherokee Sport
 

Bill, I think he is starting the engine each time.

"L.W. ("ßill") ------ III" <----------@cox.net> wrote in message
news:43CDC458.41A06B9C@cox.net...
> Do not use the engine starter position. And I always have the door
> open as I can't fit in a Cherokee.
> God Bless America, Bill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> reconair wrote:
>>
>> Bill,
>>
>> I tried as you suggested, but the odometer does not change off of the
>> milege reading. On the 4th on, all that is shown is the milege. I
>> assume
>> that the 1st "on" is engine start then off, on/off, on/off, on. I also
>> tried an additional on/off/on, but no change.

Re: Check Engine Codes for 2002 Cherokee Sport
 

Bill, I think he is starting the engine each time.

"L.W. ("ßill") ------ III" <----------@cox.net> wrote in message
news:43CDC458.41A06B9C@cox.net...
> Do not use the engine starter position. And I always have the door
> open as I can't fit in a Cherokee.
> God Bless America, Bill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> reconair wrote:
>>
>> Bill,
>>
>> I tried as you suggested, but the odometer does not change off of the
>> milege reading. On the 4th on, all that is shown is the milege. I
>> assume
>> that the 1st "on" is engine start then off, on/off, on/off, on. I also
>> tried an additional on/off/on, but no change.

Re: Check Engine Codes for 2002 Cherokee Sport
 

Bill, I think he is starting the engine each time.

"L.W. ("ßill") ------ III" <----------@cox.net> wrote in message
news:43CDC458.41A06B9C@cox.net...
> Do not use the engine starter position. And I always have the door
> open as I can't fit in a Cherokee.
> God Bless America, Bill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> reconair wrote:
>>
>> Bill,
>>
>> I tried as you suggested, but the odometer does not change off of the
>> milege reading. On the 4th on, all that is shown is the milege. I
>> assume
>> that the 1st "on" is engine start then off, on/off, on/off, on. I also
>> tried an additional on/off/on, but no change.

Re: Check Engine Codes for 2002 Cherokee Sport
 

The 2002 is OBD II compliant, go to the store and buy a diagnostic code
reader, or use theirs for free. AutoZone will pull the codes for you, they
simply plug the code reader into the data port on the bottom of the
dashboard (near where you left leg rests while driving).

On your '91, there is no need to run the engine to 2500 RPM. Just turn the
key on and off 5 times within 5 seconds, then leave it on and count the
flashes.






"reconair" <reconair@staffnet.com> wrote in message
news:11sr60tj4h1a693@corp.supernews.com...
> How do you check the diagnostic codes on this model vehicle? It's a 02
> Cherokee Sport with the 4.0L and auto transmission. I assumed I could
> check it the same way as I do my 91 YJ 4.0L by running the engine to 2500
> rpm, letting the rpm drop and turning the ignition off, then on, then off,
> and back on and waiting for the Check Engine light to flash out the number
> pairs, but it don't work that way.
>
> Help appreciated.
> Scott
>

Re: Check Engine Codes for 2002 Cherokee Sport
 

The 2002 is OBD II compliant, go to the store and buy a diagnostic code
reader, or use theirs for free. AutoZone will pull the codes for you, they
simply plug the code reader into the data port on the bottom of the
dashboard (near where you left leg rests while driving).

On your '91, there is no need to run the engine to 2500 RPM. Just turn the
key on and off 5 times within 5 seconds, then leave it on and count the
flashes.






"reconair" <reconair@staffnet.com> wrote in message
news:11sr60tj4h1a693@corp.supernews.com...
> How do you check the diagnostic codes on this model vehicle? It's a 02
> Cherokee Sport with the 4.0L and auto transmission. I assumed I could
> check it the same way as I do my 91 YJ 4.0L by running the engine to 2500
> rpm, letting the rpm drop and turning the ignition off, then on, then off,
> and back on and waiting for the Check Engine light to flash out the number
> pairs, but it don't work that way.
>
> Help appreciated.
> Scott
>

Re: Check Engine Codes for 2002 Cherokee Sport
 

The 2002 is OBD II compliant, go to the store and buy a diagnostic code
reader, or use theirs for free. AutoZone will pull the codes for you, they
simply plug the code reader into the data port on the bottom of the
dashboard (near where you left leg rests while driving).

On your '91, there is no need to run the engine to 2500 RPM. Just turn the
key on and off 5 times within 5 seconds, then leave it on and count the
flashes.






"reconair" <reconair@staffnet.com> wrote in message
news:11sr60tj4h1a693@corp.supernews.com...
> How do you check the diagnostic codes on this model vehicle? It's a 02
> Cherokee Sport with the 4.0L and auto transmission. I assumed I could
> check it the same way as I do my 91 YJ 4.0L by running the engine to 2500
> rpm, letting the rpm drop and turning the ignition off, then on, then off,
> and back on and waiting for the Check Engine light to flash out the number
> pairs, but it don't work that way.
>
> Help appreciated.
> Scott
>