Question about Chrysler Voyager
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Posted on Jan 02, 2017
SOURCE: Hi, Got a Chrysler Voyager 3.3
How is your transmission shifting?
the reason I ask is because your code is a communication loss code between the TCM and the other module(s). It's not uncommon for the wiring problems to develop in the harness that runs from the PCM in front of the battery to the TCM on the Pass side inner fender. Look around where the harness is tie strapped to the transmission pan. it's common for the wires to break or be full of water especially after somebody has had the pan off or the transmission has been removed for repair. Can also be a wiring problem right at the PCM or TCM connector or the TCM itself TCM is transmission control module)
although not as likely as a wiring issue.
when communication is lost the transmission will go into limp mode which is 2nd gear and stay there. Sometimes it will come back every time the van is shut off. Not an easy fix but on the plus side not an overly expensive one if you're gonna tackle it yourself. You'll need a scanner that will give you input and output speed sensor readings and a wiring diagram. TCM's should be reasonably cheap used or even new, not sure haven't priced one in forever and the wrecking yard are full of them and even the connector(s) should they be required
Posted on Aug 04, 2008
Have a look at this link, it is the 2.5L, but just be sure all looks same. Scroll down pictures on left & click on picture to expand
Posted on Jan 02, 2009
If it's in limp mode, the check engine light is on steady, or blinking, or a combination of the two. You need to have trouble codes read, most parts stores offer this as a free service. They will plug a hand held scan tool into the vans diagnostic port under the dash, and 'read' codes stored in the computer. They can explain what they mean, and make recommendations on what to do to fix it. If you have any questions after that, post them here with the code #'s.
Posted on Apr 18, 2009
Code p1776 is solenoid switch valve latched in low/reverse position. Valve is located in valve body not solenoid body. The possibilities are:
the low/reverse pressure switch itself is bad
the transmission control relay output circuit is open
the control circuit (sense) of the l/r switch is open, shorted to ground or shorted to voltage.
The control relay's output is on pin #6 of the 8-pin plug of the transmission (red wire); you could verify that the wire has 12V on it when you are idling (and I guess I would put it in gear with the brakes applied). Also examine/shake the wire for intermittent connection possibility.
The solenoid sense circuit connects pin # 8 (light blue) to pin #50 of the transmission control module. You could check that connection and monitor it for voltage to fluctuate between 0V and some measurable V when the trans is shifting normally, and to loose that fluctuation when it is not, which would verify the circuit is OK.
If that proved to be OK, then I would suspect the switch isn't responding and needs to be changed.
The solenoid box is removable after you drop the pan and remove the valve body, and so it would not seem to be an horrendous expense (compared to a rebuild). I haven't done this myself so I can't comment on doing-it-yourself.
I would try to find a competent independent shop that know the Chrysler trans and discuss it with them as to the cost of replacing the l/r pressure switch as the alternative
The code p1784 is about the switch that monitors the hydraulic pressure for operating the low/reverse clutch of the transmission. That clutch is called into play for all forward gears as well as reverse, so it seems reasonable if that clutch were not working that the car wouldn't move in any gear. I would begin by making sure that there is sufficient trans fluid by inspecting its dipstick. If needed only use ATF +4 but don't overfill it. Also, just on a chance, take a look underneath to see if you see any motion of either the left or right half axles (or one moving, but one not) which would be another reason for no motion due to a drive shaft disconnection or some such anomaly. Other than that, your problem could be with the Low/Reverse solenoid switch in the solenoid pack portion of the transmission (the box on the driver's side of the trans) being stuck. That can be repaired without removing and rebuilding the transmission so let us hope that may be the cause. I would have the car towed to a good independent trans shop that has a reputation for knowing how to service the Chrysler electronic transmission.
DTC code p0700 is a transmission control system (mill light) which is related to the other two codes mentioned above.
Posted on Oct 21, 2009
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Hello! Back-up lights are controlled by a relay. Under hood is the "Power Distribution Box"; Open hinged lid and locate back-up lights relay. Remove and replace. You may notice that relay is melted; They are well known for this.
You can purchase a Haynes repair manual at most auto part stores for around $15
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Posted on Dec 10, 2009
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