2014 Grand Caravan No Crank No Start

VIN- 2C4RDGBG3ER282114

This is a real puzzler. Our van had to be towed back, the PRNDL indicating Reverse and reverse lights were on, but the shifter was in Park. Fobik couldn't be pulled out (without a heavy tug). No codes pulled, although was not able to communicate with the TCM...

We have the Mitchell DIY coverage for this van, but as I'm sure all know, its no fun trying to locate the data your looking for easily with it! Managed to find a Transmission Circuit Diagram but was of little help since was not familiar with how the transmission shifter operation actually worked on these buggies. A helpful tech on IATN gave me a youtube link which has helped enormously:



I called our local Mr. Transmission shop and he faxed me over the pin connector diagram for the PCM connector, and although not able to verify anything with scan data pids (still no communication with TCM) was able to ground the T41/C1 pin and it allowed me, just as in his video to start and move the vehicle. Actually took it for a small drive and all works as normal except for the PRNDL display acting up.

Now apparently, the PCM relies on a series of combinations of low and high signals on 4 pins of the TCM connector to indicate the shift lever position. (T41, T42,T3,T1) I'm just trying to figure out what is causing the fault, a bad shift lever mechanism or the internal Range Sensor, that is not pulling the T41 to ground at the proper time to indicate Park and Neutral.

the P0706 code actually has a table of the values for these pins which is sort of helpful but in order to backtrack from the T41 pin to find out what is not doing its job (pulling that wire to ground at the right time) would require proper diagrams that I can't seem to locate.

If anybody is more familiar with these systems on the caravans, I would super appreciate a nudge in the right direction on this one, I just don't want to tear the dash all apart to switch out a shifter mechanism only to find out it was the range sensor in the tranny causing all the grief.

UPdate: Turns out this work around does not return it to 'normal' running conditions-it is running in limp mode, not shifting out of 2nd gear.

Likely the ignition switch check with dealer if that year is under the ignition switch recall my wife's 2010 had that problem and was replaced under recall!

Sent from my SM-N920P using Tapatalk

Also check your battery cables for corrosion you would never guess how much trouble that will cause on these chryslers...

Sent from my SM-N920P using Tapatalk

Forgot to mention it in OP but it has already been into the dealer for that recall work on the WIN.

Did you get connection to the TCM ? Can you connect to the ECM ?live data would be helpful in knowing what the range sensor says...

Sent from my SM-N920P using Tapatalk

I just finished putting in a used shifter assembly got from the wreckers, with no way to figure out a direction on this, I gambled on the shifter rather than the range sensor in the tranny. Well, no luck, still same issue.

Still have no comms with TCM. Can pull up all other modules. I have ground on pin 1and 23 and 5V on pin 4 of the pressure switch connector at the transmission.

Slow down fix your computer issues before replacing anything ... have you checked all your fuses ? Check transmission relays if there are any . Any ground wires broken . Was there any recent work done to the van?

Sent from my SM-N920P using Tapatalk

I would focus on your no communication issue. Is the TCM the only module you can't communicate with?

I checked all fuses and grounds and all tested ok. The transmission has been having some sort of leakage problem of late where it has been down to Mr. Transmission several times to find the source..sort of a still ongoing issue. Not sure if its related but when I asked them at the transmission shop about any relation they didn't seem to think so. They are a stumped as I am on whats going on currently.

gav09 wrote: I would focus on your no communication issue. Is the TCM the only module you can't communicate with?

Yes, on TCM is not available. Boss is in a big rush to have it fixed and had me send it out to another shop, will try and reach out to them and find out what all they find.

Any word on the fix for this yet?

Sent from my SM-N920P using Tapatalk

Ben wrote: Any word on the fix for this yet?

Sent from my SM-N920P using Tapatalk

Never heard back on what they found or didn't find at the other shop. Sounds like they just swapped out the entire transmission with a used one from the wreckers. The shop the boss sent it to is not a transmission shop per se, but the boss seems to think the fella at Mr. T is not reliable (long story). Got the van back now and has been running well..too bad nothing was learned from that episode..

Thanks for all the replies fellas!

Chris_In_North_Bay wrote:

Ben wrote: Any word on the fix for this yet?

Sent from my SM-N920P using Tapatalk

Never heard back on what they found or didn't find at the other shop. Sounds like they just swapped out the entire transmission with a used one from the wreckers. The shop the boss sent it to is not a transmission shop per se, but the boss seems to think the fella at Mr. T is not reliable (long story). Got the van back now and has been running well..too bad nothing was learned from that episode..

Thanks for all the replies fellas!

Ah yeah, always sucks to leave stuff like that unresolved. Nothing you did wrong!

Thanks for keeping us updated, anyway!