I got a 2000 Cherokee Classic 4x4 at about 300k on the clock and recently had some weird issues with a recurring p0715.
Here is a "small" condensed list of things I have looked into based on my searches and diagnosis:
- Verified trans fluid level at operating temp in neutral on level ground
- Tested TPS per testing guidelines (5v ref, ground, singal, using analog meter to see the voltage changes) everything within spec and tried a spare I had MOPAR OEM
- Cleaned and tested all grounds on chasis/engine bay with <= 0.02 ohms at each point
- Cleaned NSS, verified 12V signal thru TCM plug in each gear. Verified continuity on the pins in the engine bay harness. Starts in P and N and reverse lights work
- Changed out the transmission input and output speed sensor OEM MOPAR and tested for 500-700 ohms, checked out. Also, measured AC voltage to verify pulse generation gear 1-3. No AC voltage signal present in 4th gear on the input side?
- Had a spare TCM from a 1999 and still triggers code
- Tested the wires from the input speed sensor to the TCM and to the PCM. No shorts to ground or short to voltage according to the test procedure in alldata
- Replaced all shift solenoids because the old ones had some high resistance values on the 2nd
- New Dex 3 fluid poor man flush 3 times and new filter. No metals found in the pan
- Checked CCD Bus +/- signals through TCM connector and dash cluster and they check out
- Checked the brake switch at the pedal for proper adjustments and voltage and it checks out no TCC lock/unlock problems
- Replaced my CPS because it was old and was being wonky with OEM sensor MOPAR
- Forgot to mention I have adjusted the kick down cable using the procedures from the manual I found online
I think that was everything. Sorry for the super list. Anyway, I am trying to see if I missed anything or if anyone has experience with this issue. The car doesn't go into limp mode at all and still shifts which is super strange. When I shift to 3rd and leave it there the MIL does not come on and when I drive over 20 mph in D the MIL does not come on. Only at low speeds there seems to be an issue and I get the P0715.:flamemad:
Here is a "small" condensed list of things I have looked into based on my searches and diagnosis:
- Verified trans fluid level at operating temp in neutral on level ground
- Tested TPS per testing guidelines (5v ref, ground, singal, using analog meter to see the voltage changes) everything within spec and tried a spare I had MOPAR OEM
- Cleaned and tested all grounds on chasis/engine bay with <= 0.02 ohms at each point
- Cleaned NSS, verified 12V signal thru TCM plug in each gear. Verified continuity on the pins in the engine bay harness. Starts in P and N and reverse lights work
- Changed out the transmission input and output speed sensor OEM MOPAR and tested for 500-700 ohms, checked out. Also, measured AC voltage to verify pulse generation gear 1-3. No AC voltage signal present in 4th gear on the input side?
- Had a spare TCM from a 1999 and still triggers code
- Tested the wires from the input speed sensor to the TCM and to the PCM. No shorts to ground or short to voltage according to the test procedure in alldata
- Replaced all shift solenoids because the old ones had some high resistance values on the 2nd
- New Dex 3 fluid poor man flush 3 times and new filter. No metals found in the pan
- Checked CCD Bus +/- signals through TCM connector and dash cluster and they check out
- Checked the brake switch at the pedal for proper adjustments and voltage and it checks out no TCC lock/unlock problems
- Replaced my CPS because it was old and was being wonky with OEM sensor MOPAR
- Forgot to mention I have adjusted the kick down cable using the procedures from the manual I found online
I think that was everything. Sorry for the super list. Anyway, I am trying to see if I missed anything or if anyone has experience with this issue. The car doesn't go into limp mode at all and still shifts which is super strange. When I shift to 3rd and leave it there the MIL does not come on and when I drive over 20 mph in D the MIL does not come on. Only at low speeds there seems to be an issue and I get the P0715.:flamemad: