Speed sensor location

NO ENGINE told and huge engines get the huge torque rated transmission, no VIN code for engine told.
3 engines it seems 2.5, 3.0v6 and 3.3v6.???????/?
not the Dodge AWD option right with PTU?

the tranny is old. 250,000 + miles??????
the limpmode is to prevent super expensive damage to the trannys
clutch packs, ( VAST TCM DO THAT EVEN NOW)

it is saving its bacon, and also prevents car being dead, all gears slip.... a moving cars is far better than any dead car.!
ymmv
for sure. now you know the why
but 1992 is, old and HAS A TCM, and said TCM did this.
THE TCM IS 100% SEPARATE BOX.
back then we do not have OBD2 we had OBD1 and scan tools super
31 years old.,hard to find now Dodge only tools.DRB 1 UP
join a old Dodge real form
and find posters that know how to get the 1992 TCM to do flash codes
if can.
all 3 ENGINES ARE tcm SHIFTED (BEST I CAN TELL)
ECU DTC ERRORS ARE JUST KEY'D 3 TIMES TRICK GOOGLE IT

BUT DOES NOT DO TCM SORRY THE KEY TRICK IS ECU ONLY
ENGINE ONLY THAT.


it. many cars that year 3 transmission choices then new car.
and they are not the same at all
the 3.3L v6 has TCM and is PnP plug and play.
3,3L has 41TE box. with above TCM
see what I did here,is lookup engine see parts for tranny and see TCM there and name of box. all for free, AND I READ SM
SERVICE MANUAL 1992 THIS VAN


ok the 4banger has TCM too but is 30TE box 3speed not 4.
known speed is a huge help.

so google dodge caravan 1992, 41TE blink flash codes?
I SEE NONE.

ECU FAULT CODES ARE EASY TO GET. KEY TRICK.

GETTING 1992 TCM DTC ERRORS IS NOT EASY NOW

ABOUT 1996 MANY CARS ALLOWED OBD2 TO SEE BOTH ECU AND PCM AS ONE DEVICE,

THEY WERE E SERIAL LINKED THEN
BUT NOT IN 1992 .

THE KEY ON TRICK DOES WORK FOR ECU AND TRANSMISSION REAR vss1 SPEED SENSOR DEAD. JUST 1 SENSOR TAIL OF BOX
FACTOID #1

OBD1 FOR DODGE WILL NEVER WORK ON FORD OR GM.
OR THE REVERSE TOO DOES NOT WORK

THE SLOG OF ODB1 PAIN.

FINDING SCAN TOOLS THIS OLD IS NOT EASY
OR EVEN A SHOP THAT HAS OBD1 DODGE TOOLS AT HAND AND NOT LONG AGO WRECKED FROM 31 YEARS OF USE.

SORRY I CAN NOT FIND OBD1 TOOLS SOLD 2023.
FOR SURE TCM VERSIONS.

RE-SEAT THE TRANNY MAIN CONNECTOR DOWN UNDER YET
CHECK LEVELS OF ATF

THE DEALER USED DRB TOOLS WITH TCM PLUG-INS
HERE IS THE HISTORY ON DRB
CLEAR AS DAY AND GOOD AND VERY HARD TO FIND SHOPS WITH IT, BUT DO ASK THEM.

https://dodgeforum.com/forum/1st-gen-dakota-tech/435783-chrysler-drb-scan-tool-and-mopar-diagnostic-system-overview-and-faq.html

WITH
SuperCard1:

You should NOT be driving this vehicle if it is in limp mode. You will need to pay a Good Auto-electrician to look at this problem.
All modern cars and trucks are fitted with electronic control units referred to as the PCM and the TCM. P1698 refers to these units not communicating properly with each other. So the vehicle goes into a safety set up until the problem it fixed, Limp Mode.

Hi there:
This code means that the transmission is slipping in high gear and the TCM (TRansmission Control Mocule) logic thinks it has incorrect ratio since it monitors input and output speed. Keep in mind that TCM uses input from the input speed sensor and output speed sensor to determine gear ratios. The TCM then compares the known gear ratio to the calculated gear ratio for the current range.


Check HERE test procedure.


Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.


Thank you for using FixYa, have a nice day.

Its very possible that the transmission output speed sensor has gone bad. The output speed sensor is what the speedometer reads for vehicle speed. When you open the hood and look straight down at the front of the transmission you will see two sensors that screw into the side of the transmission case that are about the size of a half dollar, the output speed sensor will be the one on the far right side.

The code P1698 is: No CCD messages from TCM. That means the communication between the Transmission Control Module and the Power Control Module is lost. Sometimes this happens when a PCM, or TCM is replaced without being flashed, a bad connection at the PCM, TCM, or a bad TCM. Hope this helps.

p1698 code no instrutment cluster

the tcm is located in the fender well behind the bumper drivers side black box check the wiring for bad cannection,

let us know what you find there are thousands of us with the same problem

dan

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