2017-2021 Grand Cherokee, Pacifica & Gladiator Telematics Module: Uconnect Service, Programming & 3G Sunset Issues

What the Telematics Interface Module Does

The Telematics Interface Module is the electronic brain that powers your vehicle's connected features. It acts like a built-in cell phone for your car, enabling communication for safety, security, and convenience services. This includes the overhead SOS and Assist buttons, which can automatically contact emergency services after a crash by sending your GPS location. It also enables remote features through the Uconnect app, such as starting your engine, locking or unlocking the doors, and finding your vehicle in a parking lot. For vehicles equipped with it, this module also provides the data connection for the in-car Wi-Fi hotspot. Essentially, if a feature relies on communicating with the outside world over a cellular network, it runs through this module.

Symptoms of a Failing Telematics Module

When the telematics module begins to fail, you will primarily notice a loss of connected services. The vehicle itself will usually remain safe to drive, but communication-based features will become inoperable.

• "Uconnect Box Requires Service" Message: A common symptom is a persistent message on the infotainment screen telling you to visit a dealer.
• SOS/Assist Button Malfunction: The lights on the overhead SOS or Assist buttons may stay lit constantly or not light up at all, and the buttons will not function if pressed.
• Mobile App Failure: Remote features like remote start, lock/unlock, and vehicle location will stop working through the phone app.
• GPS and Navigation Issues: The vehicle's GPS may become inaccurate, showing your location as being far from where you actually are, or you may get a "GPS Signal Lost" message.
• Wi-Fi Hotspot Inoperative: The in-car Wi-Fi hotspot will fail to establish a connection.

Associated OBD-II and Diagnostic Trouble Codes (DTCs)

A failing telematics module often stores specific communication or body codes. While a standard OBD-II scanner might not read them, a more advanced tool may find codes such as:

• U0198: Lost Communication With Telematics Control Module.
• B1570-93: Telematics Box Module Backup Battery - No Operation.
• B1498-13 & B1498-19: Emergency Call Button Circuit Open or Overcurrent.

Sometimes, the issue isn't the module itself but a related component like the shark fin antenna on the roof, which can allow water to leak in and corrode the wiring.

Known Issues, Recalls, and Technical Service Bulletins (TSBs)

The 3G Cellular Network Sunset (2017-2018 Models)

Recalls and TSBs

• 2017 Jeep Grand Cherokee: There are no specific recalls for the telematics module itself. However, a broad recall (NHTSA 18V-332) was issued for a cruise control software issue that required a dealer to re-flash the Powertrain Control Module.
• 2017-2018 Chrysler Pacifica: These models were also included in the cruise control software recall (NHTSA 18V-332). Hybrid models had a separate recall (NHTSA 18V-634 / FCA U94) for a powertrain control module software update to prevent engine restart issues. Several TSBs exist for software updates to the radio and other modules to fix various glitches, some of which can mimic telematics issues.
• 2021 Jeep Gladiator: TSB 08-053-21 involves a software update for the Telematics Box Module to correct an issue where CarPlay audio would not mute during an emergency call.

The Most Important Step: Programming and Activation

The programming process also involves downloading a security certificate to the module to allow it to connect to the Uconnect network for the first time. This often requires the vehicle to be in an area with good cellular reception. While some advanced independent shops can perform the necessary programming, many owners will find a dealership visit is required to ensure full functionality. Always confirm with your chosen repair shop that they have the capability to program a replacement telematics module for your specific vehicle before purchasing the part.

Buying a Used Telematics Interface Module: What to Know

Purchasing a used OEM telematics module can be a cost-effective solution, especially for a 2021 Jeep Gladiator where the part is still functional. For 2017-2018 models affected by the 3G sunset, replacing the module is generally not recommended unless you are simply trying to clear a related fault code.

• Verify Part Numbers: Ensure the part number on the used module (e.g., 68235892AA) matches your original part. While interchangeable numbers may exist, an exact match is the safest bet.
• Check Option Codes: This module is only compatible with vehicles that have Option Code RF3. You can find your vehicle's build sheet and option codes on Mopar's owner website by entering your VIN.
• Factor in Programming Costs: Remember that the price of the used part is not the final cost. You must budget for professional programming, which can cost between $100 and $250.
• Physical Inspection: When you receive the used module, inspect it for any signs of damage, particularly to the plastic casing and the connector pins. Ensure the pins are straight and free of corrosion.
• Why Used OEM is a Good Choice: For complex electronics like this, a used OEM module is often superior to non-existent or unreliable aftermarket alternatives. It was designed to communicate perfectly with your vehicle's systems, and as long as it is programmed correctly, it should function like new.

Replacement Cost Comparison

Prices can vary based on your location and the supplier. The costs below are estimates to help you understand the value of a used OEM part.

Frequently Asked Questions (FAQ)