I'm having a problem with the transmission in my 06 Chrysler 300C 5.7 AWD and want to rule out some things.
Couple of weeks ago I started the car, the battery was a little low and struggled to start but it did start on the first attempt.
The ESP/BAS light came on and then when I put it in reverse and the tranny didn't do anything. I gave it some gas and then it banged into gear. Same thing when I put it in Drive. After some driving, it finally and violently shifted into 2nd and 3rd and then lots of chimes went off and it went into Neutral. I was able to coast and park. I started the car about an hour later and she shifted into Reverse and Drive and moved back and forth in the parking spot. My buddy towed it home for me using dollies due to the AWD.
Tranny's been stuck in limp mode ever since, only 1st (maybe 2nd) and reverse.
I got codes P0700 (TRANSMISSION CONTROL SYSTEM (MIL REQUEST) , P0730 (Incorrect Gear Ratio) and P0778 (Pressure Control Solenoid B Electrical).
I have changed the fluid and filter and then also siphoned more out and replaced it to flush the fluid some. Fluid level is good.
Oh, I also cleaned the 13 pin connector yesterday, there was some tranny fluid in there. I couldn't replace it because it wouldn't come out even after loosening the 7mm bolt. The bolt wasn't free spinning in the conductor plate like some have experienced, it was completely loosened and still the connector wouldn't come out of the tranny. Could be because the tranny wasn't up to operating temp and the aluminum case hadn't expanded enough to release the connector.
After cleaning the 13 pin connector, I haven't gotten the P codes again but the tranny is still in limp mode.
Couple of hours ago I went at it again and after checking for codes, the only one I got now is P0748 (Pressure Control Solenoid A Electrical).
I also checked the resistance of the solenoids by disconnecting the harness to the TCM and using pin 38 as ground and all the solenoids are within spec.
I then plugged the harness back in, turned the engine ON and checked voltage going to TCM, pin 29 pink/black wire, and got 14.4 volts. I then checked the Solenoid Supply Voltage, pin 38 solid yellow wire, and got 3.2V in Park and 6V in Drive.
I believe that I should be seeing 11-14V at pin 38. So I'm guessing either the Conductor Plate is bad or the TCM?
Now, could a sensor or module outside of the TCM, such as ABS speed sensors or module, PCM, ESP/BAS, be sending an erroneous signal and causing the TCM to command a lower voltage to the solenoids, thus forcing the car into Limp Mode?
Also, how do I do a HARD reset of all the modules, TCM, PCM, ABS, etc? I have disconnected the battery and kept the positive and negative straps connected to each other for a couple of hours. Is that the best method?
Thanks in advance.
Couple of weeks ago I started the car, the battery was a little low and struggled to start but it did start on the first attempt.
The ESP/BAS light came on and then when I put it in reverse and the tranny didn't do anything. I gave it some gas and then it banged into gear. Same thing when I put it in Drive. After some driving, it finally and violently shifted into 2nd and 3rd and then lots of chimes went off and it went into Neutral. I was able to coast and park. I started the car about an hour later and she shifted into Reverse and Drive and moved back and forth in the parking spot. My buddy towed it home for me using dollies due to the AWD.
Tranny's been stuck in limp mode ever since, only 1st (maybe 2nd) and reverse.
I got codes P0700 (TRANSMISSION CONTROL SYSTEM (MIL REQUEST) , P0730 (Incorrect Gear Ratio) and P0778 (Pressure Control Solenoid B Electrical).
I have changed the fluid and filter and then also siphoned more out and replaced it to flush the fluid some. Fluid level is good.
Oh, I also cleaned the 13 pin connector yesterday, there was some tranny fluid in there. I couldn't replace it because it wouldn't come out even after loosening the 7mm bolt. The bolt wasn't free spinning in the conductor plate like some have experienced, it was completely loosened and still the connector wouldn't come out of the tranny. Could be because the tranny wasn't up to operating temp and the aluminum case hadn't expanded enough to release the connector.
After cleaning the 13 pin connector, I haven't gotten the P codes again but the tranny is still in limp mode.
Couple of hours ago I went at it again and after checking for codes, the only one I got now is P0748 (Pressure Control Solenoid A Electrical).
I also checked the resistance of the solenoids by disconnecting the harness to the TCM and using pin 38 as ground and all the solenoids are within spec.
I then plugged the harness back in, turned the engine ON and checked voltage going to TCM, pin 29 pink/black wire, and got 14.4 volts. I then checked the Solenoid Supply Voltage, pin 38 solid yellow wire, and got 3.2V in Park and 6V in Drive.
I believe that I should be seeing 11-14V at pin 38. So I'm guessing either the Conductor Plate is bad or the TCM?
Now, could a sensor or module outside of the TCM, such as ABS speed sensors or module, PCM, ESP/BAS, be sending an erroneous signal and causing the TCM to command a lower voltage to the solenoids, thus forcing the car into Limp Mode?
Also, how do I do a HARD reset of all the modules, TCM, PCM, ABS, etc? I have disconnected the battery and kept the positive and negative straps connected to each other for a couple of hours. Is that the best method?
Thanks in advance.