2003 Dodge Caravan engine code P1698

Tiny
MINIVANMAN
  • 2003 DODGE CARAVAN

Computer problem
2003 Dodge Caravan 6 cyl Two Wheel Drive Automatic 100000 miles

my minivan has the check engine lioght on and I have a couple of codes, but there is one that I cant seem to find a defenition for its the p1698 code what does it mean? Some body has any idea please let me know!

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Sunday, May 2nd, 2010 AT 5:30 PM

13 Replies

Tiny
BMRFIXIT
  • EXPERT
  • 19,478 POSTS

DTC P1698: NO BUS MESSAGE FROM TRANS CONTROL MODULE
NOTE:For component location, see COMPONENT LOCATIONS. For connector identification, see CONNECTOR IDENTIFICATION. For circuit identification and wiring diagram, see WIRING DIAGRAMS. In testing procedures Alpha/Numeric character in parenthesis i.E. (K4) designates circuit. After each repair procedure has been completed, reconnect all components. Perform POWERTRAIN VERIFICATION TEST VER-1 under VERIFICATION TESTS to ensure system is functioning properly.

Monitored & Set Conditions
Messages from Transmission Control Module (TCM), when equipped with a 4 speed automatic transmission, are monitored with ignition on and battery voltage greater than 10.4 volts. DTC will set if no bus messages are received from TCM for 20 seconds on 2 trips.
Possible Causes
Intermittent Condition
Communication With TCM
PCM

Turn the ignition on. With the DRBIII scan tool, erase DTCs. Cycle the ignition key on and off several times, leaving the ignition on for at least 20 seconds. With the DRBIII scan tool, read DTCs. Does the DTC reset? If yes, go to next step.

With the DRBIII scan tool, attempt to communicate with the TCM. Can communication be established with the TCM? If yes, go to next step. If no, perform the appropriate test related to no communication with TCM.
WARNING:When the engine is operating, do not stand in a direct line with the fan. Do not put your hands near the pulleys, belts or fan. Do not wear loose clothing.

The conditions that set the DTC are not present at this time. The following may help in identifying the intermittent condition. With the engine running at normal operating temperature, monitor the DRBIII scan tool parameters related to the DTC while wiggling the wiring harness. Look for parameter values to change and/or a DTC to set. Review the DRBIII scan tool Freeze Frame information. If possible try to duplicate the conditions under which the DTC was set.
Visually inspect the related wiring harness.
Look for any chafed, pierced, pinched, or partially broken wires. Visually inspect the related wiring harness connectors. Look for broken, bent, pushed out, or corroded terminals. Were any of the above conditions present? If yes, repair as necessary. If no, test is complete.

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Monday, May 3rd, 2010 AT 6:40 AM
Tiny
GERRYCAN
  • 2000 DODGE CARAVAN

Transmission problem
2000 Dodge Caravan 6 cyl Front Wheel Drive Automatic 140000 miles

Got scanned codes P1698 and P0500. was told to change both speed sensors input and out put speed sensors.Did the change.but did not get any improvement.By-the-way ,the drivability fault is ,drives only in one forward gear can reverse ok .speedometer does not move at all.don't know i am travelling at 2, 5 or 25 mph !What step next ,should I change (PCM)or is there a fuse that controls power to PCM.Thanks for your help......


http://www.2carpros.com/forum/automotive_pictures/314470_2000_dodge_1.jpg

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Thursday, December 22nd, 2016 AT 3:34 PM (Merged)
Tiny
2CARPROS KEN
  • ADMIN
  • 10,890 POSTS

Suspect the transmission is going out, the sensor pick up on the difference between the input and out shafts not correlating becasue the internal clutches are slipping.

This is a common problem with these vans.

Please let us know happens so it will help others.

Best, Ken

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Thursday, December 22nd, 2016 AT 3:34 PM (Merged)
Tiny
CM12285
  • 2000 DODGE CARAVAN
  • 3.3L
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 199,999 MILES

What is the the trouble shooting procedure for trouble code p1698 in a 2000 GrandCaravan sport. I changed the Transmission control module and now get the new code p1698. Who or what else could be the solution for this new error code.

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Thursday, December 22nd, 2016 AT 3:35 PM (Merged)
Tiny
CARADIODOC
  • EXPERT
  • 28,841 POSTS

P1698 - No Bus Message From TCM

Why did you replace the computer? First I'd erase the code and see if it comes back. If it does, start by checking the fuses. If it doesn't, any chance the ignition switch was turned on while no computer was plugged in?

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Thursday, December 22nd, 2016 AT 3:35 PM (Merged)
Tiny
CM12285
  • MEMBER

Previous TCM tripped error code P0700 and the last expert insisted that the problem would be resolved by replacement of TCM. Last expert insists that TCM is still the problem, however, the replacement TCM is faulty itself or incorrect model therefore tripping the p1698. Any insight?

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Thursday, December 22nd, 2016 AT 3:35 PM (Merged)
Tiny
CARADIODOC
  • EXPERT
  • 28,841 POSTS

Code 700 in the Engine Computer just means there's a code in the Transmission Computer. Most simple code readers don't access anything other than the Engine Computer. You need a scanner to read the codes in the other computers.

When a computer detects a problem, it sets a fault code. It's important to read those codes before a computer or the battery is disconnected, otherwise that valuable information will be lost. That's especially important when you're trying to find the cause of an intermittent problem. Without a code to start with, diagnosing the cause of a problem is almost impossible.

The original computer should not have been replaced just because it stored a fault code. The computers themselves really don't cause many problems. If you still have the original one, stick it back in, then hope it detects the same problem so it can be identified.

What was the original symptom? Code 700 should have turned on the Check Engine light, but was there a shifting problem too?

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Thursday, December 22nd, 2016 AT 3:35 PM (Merged)
Tiny
JAKESNAKE
  • 2000 DODGE CARAVANDODGE CARAVAN

1998 Dodge Grand Caravan 6cyl, 3.0L, 139000 miles. I have a diagnostic code of P1698. What does that mean and how do I fix it?

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Thursday, December 22nd, 2016 AT 3:35 PM (Merged)
Tiny
2CARPROS KEN
  • ADMIN
  • 10,890 POSTS

Hi JAKESNAKE,

This code means the main computer is having a problem, I would try disconnecting the wiring connectors at the PCM and checking them for corrosion, if none is found this is a classic computer failure. Replace the computer and then retry the system and can get a used one from a wrecker to save money too.

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Thursday, December 22nd, 2016 AT 3:35 PM (Merged)
Tiny
JAMESDEAN46107
  • 1999 DODGE CARAVAN
  • 188,000 MILES

My dash instruments aren't working. And every once in a while my van will not start at all unless it sits for awhile. I've had a few friends that have told me that it could be the engine control module. But, I have no clue. Any help that you can give would greatly be appreciated.

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Thursday, December 22nd, 2016 AT 3:35 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • EXPERT
  • 68,228 POSTS

No ccd message from PCM. Check wiring and pins where the wiring plugs into the PCM. Make sure they are tight, no pins are pushed in, and there is no corrosion.

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Thursday, December 22nd, 2016 AT 3:35 PM (Merged)
Tiny
MARTIN09
  • 1998 DODGE CARAVAN

Computer problem
1998 Dodge Caravan Automatic 116.00 miles

problem wiht the code p1698. I have check enginen soom light

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Thursday, December 22nd, 2016 AT 3:35 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • EXPERT
  • 68,228 POSTS

Hi:
The P1698 code means that no digital data is being received by the powertrain controller (on the left inner fender) from the transmission control module, located on the right inner fender.

If you are mechanicaly inclined and have worked on car electrical systems, the manual says to check the ccd bus wires between the module and the rest of the system using the Chrysler diagnostic readout box. But if you don't have one, I think you can do the same thing by measuring for continuity (near 0 resistance) between pin 4 of its plug and pin 11 of the data link plug under the dash.

Next, check the resistance between pin 43 if its plug and pin 3 of the data link connector. Finally check continuity from pin 7 of the data connector and pin 65 of the powertrain connector (pink wire). If the continuity between the transmission and data link connector wires checks as well as from the connector to the PCM proves to be ok, then according to the manual the trans controller should be replaced. Additionally, you should also verify that there is either a + or - bias voltage of 2.5 volts on each of those wires as a loss of bias voltage will also cause this code.

Let me know if this helps.
Joe

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Thursday, December 22nd, 2016 AT 3:35 PM (Merged)

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