AutoCodes – Generic – U1705

U1705 Code - Telematics Connectivity Module Signal Invalid

Quick Answer

The Telematics Connectivity Module is an advanced communication unit that enables a wide range of connected-vehicle services, regulatory functions, and driver-initiated features such as emergency SOS requests. Common causes include Faulty Telematics Connectivity Module, Telematics Connectivity Module harness is open or shorted, Telematics Connectivity Module circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: U1705 indicates Telematics Connectivity Module Signal Invalid.
Common causes: Common causes include Faulty Telematics Connectivity Module, Telematics Connectivity Module harness is open or shorted, Telematics Connectivity Module circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 55

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Nov 10, 2025

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code U1705 Description

The Telematics Connectivity Module is an advanced communication unit that enables a wide range of connected-vehicle services, regulatory functions, and driver-initiated features such as emergency SOS requests. It communicates with external service platforms, monitors its own electrical circuits, and sets diagnostic codes if a fault is detected, sending status messages to the instrument cluster and other vehicle modules over the CAN data bus. A built-in backup battery ensures continued operation even if the vehicle’s main battery is compromised. Working together with the Security Gateway Module, which controls and secures data flow between the telematics, audio, DLC, and other vehicle networks, the telematics module supports secure communication, remote services, and system integrity across the vehicle’s connectivity systems.

OBDII Code U1705 - Telematics Connectivity Module Signal Invalid - AutoCodes.com — U1705 Code - Telematics Connectivity Module Signal Invalid

What does this mean?

What are the Possible Causes of the DTC U1705?

Faulty Telematics Connectivity Module
Telematics Connectivity Module harness is open or shorted
Telematics Connectivity Module circuit poor electrical connection

How to Fix the DTC U1705?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the U1705 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the U1705 code?

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Information for Specific Makes

U1705 Chrysler — Telematics Connectivity Module Signal Invalid
U1705 Dodge — Telematics Connectivity Module Signal Invalid
U1705 Jeep — Telematics Connectivity Module Signal Invalid
U1705 RAM — Telematics Connectivity Module Signal Invalid

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.