FreemansXJ
NAXJA Forum User
- Location
- Spring Hill, Ks
This started off with a friends 1997 Cherokee Sport. His vehicle is equipped with the 4.0, AW4, and 231 case.
While playing around in 4wd, he noticed his CEL light come on and the Jeep was very sluggish on acceleration. It felt as though the Jeep was trying to take off in 3rd gear. When he manually placed it in 1/2 and accelerated, the Jeep accelerated as it should. He also had to manually shift it to 3rd and OD. While driving down the highway, it became obvious that the TQ was also not locking up (running 3k rpm at 70mph). I had him take it to AutoZone and have the codes ran, and it showed codes:
P0700- Transmission Control System Malfunction
P0758- Shift Solenoid B Electrical.
I did some research on here and a few other sites, and found this write up for PRE-97 models.....http://www.transonline.com/transdigest/magazines/1997-10/Shift Pointers/index.html
On the 97 and up, the TCU is located under the dash on the right side of the steering column. I could not find a diagram that showed how to test the TCU on a 97 up Cherokee, so I did the next best thing. I crawled around underneath and checked all the wires coming out of the tranny. I found no lose wires, kinks, or breaks. This lead me to believe it was a Solenoid.
I started by ordering a 2 pack of Solenoids for $98 here:
http://www.bulkpart.com/Merchant2/merchant.mvc?Screen=CTGY&Store_Code=2&Category_Code=A340solenoid
Remember, the AW4 is the same as the Toyota A340, so this is what the parts will say when you get them.
Once the parts arrived, I went to the parts store and picked up a filter/ gasket kit and 3 qts of tranny fluid. Once I had the stuff I needed, it was time to get dirty....
Start off by draining the tranny fluid using the drain plug...
Next, I removed the 10mm bolts holding the transmission pan on (hint: leave 2 on one side in so the pan does not fall to the floor when you break the seal on the gasket...saves on the mess)...
Continued.......
While playing around in 4wd, he noticed his CEL light come on and the Jeep was very sluggish on acceleration. It felt as though the Jeep was trying to take off in 3rd gear. When he manually placed it in 1/2 and accelerated, the Jeep accelerated as it should. He also had to manually shift it to 3rd and OD. While driving down the highway, it became obvious that the TQ was also not locking up (running 3k rpm at 70mph). I had him take it to AutoZone and have the codes ran, and it showed codes:
P0700- Transmission Control System Malfunction
P0758- Shift Solenoid B Electrical.
I did some research on here and a few other sites, and found this write up for PRE-97 models.....http://www.transonline.com/transdigest/magazines/1997-10/Shift Pointers/index.html
On the 97 and up, the TCU is located under the dash on the right side of the steering column. I could not find a diagram that showed how to test the TCU on a 97 up Cherokee, so I did the next best thing. I crawled around underneath and checked all the wires coming out of the tranny. I found no lose wires, kinks, or breaks. This lead me to believe it was a Solenoid.
I started by ordering a 2 pack of Solenoids for $98 here:
http://www.bulkpart.com/Merchant2/merchant.mvc?Screen=CTGY&Store_Code=2&Category_Code=A340solenoid
Remember, the AW4 is the same as the Toyota A340, so this is what the parts will say when you get them.
Once the parts arrived, I went to the parts store and picked up a filter/ gasket kit and 3 qts of tranny fluid. Once I had the stuff I needed, it was time to get dirty....
Start off by draining the tranny fluid using the drain plug...
Next, I removed the 10mm bolts holding the transmission pan on (hint: leave 2 on one side in so the pan does not fall to the floor when you break the seal on the gasket...saves on the mess)...
Continued.......