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-   -   2000 grand cherokee limp mode? (http://www.jeepgarage.org/f181/2000-grand-cherokee-limp-mode-65616.html)

kyworkingman80 09-18-2013 05:31 AM

2000 grand cherokee limp mode?
 
Hey i have a 2000 grand cherokee it was in limp mode so i did sum research and ppl were saying solenoid pack so i did the key dance after replacing solenoid pack and still getting codes 1491 1492 0700 and still seem like Might be in limp mode do i need to Érase codes what is the damn problem.lol I need advise it is the 45 rfe 4.7 Serna as if engañe has to war up to gain speed

Frango100 09-18-2013 11:18 AM

Re: 2000 grand cherokee limp mode?
 
Your jeep is a WJ, so better to post in the WJ section next time.
The P0700 is a generic transmission fault code, it only tells you that the TCM (transmission control module) has set one or more fault codes. You need to have it scanned to know what the problem is.
The P1491 has to do with the radiator cooling fan control relay circuit open or shorted. Does the engine temperature goes to redline when standing still and idling?.
P1492 is a battery temp sensor problem. This sensor sits under the battery and is used by the PCM (powertrain control module) to regulate the charging current of the battery. There is a connector below the battery tray which you could check for dirty or corroded pins. Let us know which fault codes show up for the transmission.

kyworkingman80 09-18-2013 03:25 PM

[QUOTE="Frango100;895656"]Your jeep is a WJ, so better to post in the WJ section next time.
The P0700 is a generic transmission fault code, it only tells you that the TCM (transmission control module) has set one or more fault codes. You need to have it scanned to know what the problem is.
The P1491 has to do with the radiator cooling fan control relay circuit open or shorted. Does the engine temperature goes to redline when standing still and idling?.
P1492 is a battery temp sensor problem. This sensor sits under the battery and is used by the PCM (powertrain control module) to regulate the charging current of the battery. There is a connector below the battery tray which you could check for dirty or corroded pins. Let us know which fault codes show up for the transmission.[/ When I originally went to auto zone I got codes p0760 p0755 p0770 p1781 p1492 p0750 p0765 p1491p1768 lol if that helps any fixing to go have it rescanned since I replaced solenoid pack. It goes up to 2000 rpm upon start up and then idles at 1000 for a bit new to the whole Forum thing but appreciate any help u may be able to give

Frango100 09-18-2013 08:26 PM

Re: 2000 grand cherokee limp mode?
 
By doing the keydance you will only see the generic P0700 code. Since it is still not working well, you should let a shop clear the PCM and TCM faults, test drive it and then see what will show up.
But before that, check Fuse 5 in the PDC (power distribution center) under the hood. If ok, swap the transmission control relay, also in the PDC, with the auto shutdown relay (in PDC). (if the relay is bad, the engine will now not start and you know what to replace.) No power to the transmission control relay means full time limp mode (3rd gear in D, or 2nd gear when in manual 2)
Regarding the high idle rpm, clean the idle air control (IAC) stepper motor and air canal first. The stepper motor is mounted on the throttle body right hand side, when standing in front of the jeep. It sits just under the TPS (throttle position sensor). One connector and two screws and it is out. Do NOT swist the IAC plunjer during cleaning, because you easily break of some internal plastic parts which should prevent the plunjer from rotating. If this will not solve your issue, you need to check if the accelerator cable is not binding and keep the throttle plate a bit open. A scanner with live data could show you the TPS position in %, which should be around 12% in idle. If this seems to be ok, most probably the TPS is going bad.

kyworkingman80 09-19-2013 04:44 AM

Did the whole fuse change with another fuse of the same volt and nothing:( now what?

Frango100 09-19-2013 11:08 AM

Re: 2000 grand cherokee limp mode?
 
Did you swap the transmission control relay with the auto shutdown relay?
Check the large connector on top of the solenoid block if its well connected.

kyworkingman80 09-24-2013 11:57 AM

1 Attachment(s)
Could this be the problem?

Attachment 29403

Frango100 09-24-2013 05:22 PM

Re: 2000 grand cherokee limp mode?
 
Can you show a picture from a bit further, so that i can see where this is?

kyworkingman80 09-24-2013 07:08 PM

3 Attachment(s)
Looks as if one goes to the exhaust other to right above trannny pan

Attachment 29425



Attachment 29426



Attachment 29427

Frango100 09-25-2013 12:48 AM

Re: 2000 grand cherokee limp mode?
 
The first picture is showing one of the O2 sensors. (and a second one in the background)
Second and third picture seems to show the line pressure sensor connector. Is this on the right side of the transmission, close to the exhaust hanger?
I do not see the partly melted connector on the last three pictures.

kyworkingman80 09-25-2013 12:53 AM

1 Attachment(s)
Yes passenger side

Attachment 29465

Frango100 09-25-2013 01:07 AM

Re: 2000 grand cherokee limp mode?
 
You showed the melted connector, but i have no idea where the wires go to.
The last pictures didn't show the connector at all.
If the wires go the the O2 sensor(s), then this is not your problem with the limp mode.


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