3 CODES!!! Need help

[98 jeepjeep]

Since i bought my 98 4.0 Auto XJ it has had weird random Elec. Issues causing shifting issues. Nothing that feels Mechanical.

P0700= Trans control System Malfunction.
P0122=Tps/Pedal Pos sensor A circuit Low imput.
P0705=Trans range circuit Malfunction.

After seeing the TPS code i replaced it with several JY units and then eventually 2 New ones....So is there a solenoid inside the trans pan i can replace or whats going on?

[CSaddict]

Looks like the TCM is bad.

[FlexdXJ]

I got the P0700 and 705 a couple times. I got a different code with those too, not quite sure what it was.i just cleared the codes and was on my way!

[98 jeepjeep]

Originally Posted by CSaddict

Looks like the TCM is bad.

what is that lol?? and where is it?

[jneary]

range circuit malfunction would suggest neutral safety switch is bad.

[B.RAIDER]

Originally Posted by 98 jeepjeep

Since i bought my 98 4.0 Auto XJ it has had weird random Elec. Issues causing shifting issues. Nothing that feels Mechanical.

P0700= Trans control System Malfunction.
P0122=Tps/Pedal Pos sensor A circuit Low imput.
P0705=Trans range circuit Malfunction.

After seeing the TPS code i replaced it with several JY units and then eventually 2 New ones....So is there a solenoid inside the trans pan i can replace or whats going on?

You could benefit from this site.
http://www.transonline.com/transdige...ers/index.html
At least you can see what some of the codes are...........Page 2

[98 jeepjeep]

Im gonna try to replace the TCU tommorow does anyone know what year the TCU's are the same? i can get my hand on a couple 2000 model XJ's....would they be a direct swap for my 98?

[rydizzy]

This might help.

http://www.naxja.org/forum/showthread.php?t=12575

[jeepster_259]

I've had those codes as well. It was the Transmission Control Module (TCM). I have a 98 as well. It's located under the dash on the driver's side. Just a little silver box. Put in one from a jy, fixed it.

I actually have a spare one. Let me know if you're interested.

[98 jeepjeep]

Originally Posted by jeepster_259

I've had those codes as well. It was the Transmission Control Module (TCM). I have a 98 as well. It's located under the dash on the driver's side. Just a little silver box. Put in one from a jy, fixed it.

I actually have a spare one. Let me know if you're interested.

Thank you for your reply Is the box mounted on the left side of the firewall under the DS dash? will a 00 TCM work? and what tools do i need remove it?

[lawsoncl]

Originally Posted by CSaddict

Looks like the TCM is bad.

Huh? This is NOT A BAD TCM. The P0700 and P0705 usually mean you just need to clean the Neutral Safety Switch (NSS). Here's a good writeup. http://www.go.jeep-xj.info/HowtoNSSrebuild.htm. If you aren't careful and break it getting it off, try www.teamcherokee.com for a replacement.

The P0122 is usually a bad TPS sensor or possibly wiring to the sensor.

[98 jeepjeep]

just a update i replaced the TCU with a JY unit and the codes when away on the first key cycle. My Highway rpms are back to normal. Only time will tell about the NSS codes.

[jeepster_259]

glad that fixed it!