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U1700 RAM Code - Body Control Module Signal Invalid

Quick Answer

The diagnostic code U1700 indicates an issue with the Body Control Module (BCM) signal being invalid. Common causes include Faulty Body Control Module (BCM), Body Control Module harness is open or shorted, Body Control 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
U1700 RAM indicates Body Control Module Signal Invalid.
Common causes
Common causes include Faulty Body Control Module (BCM), Body Control Module harness is open or shorted, Body Control 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.
What is this?
Table of contents Created and updated by William Orellana on Nov 10, 2025
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Code U1700 RAM Description

The diagnostic code U1700 indicates an issue with the Body Control Module (BCM) signal being invalid. The BCM is a critical electronic control unit responsible for managing various vehicle body functions, such as lighting systems, power windows, door locks, and other essential features that enhance comfort and safety. It acts as a communication hub, relaying information between different vehicle systems through networks like the Controller Area Network (CAN) and Local Interconnect Network (LIN). When the BCM detects an invalid signal, it suggests that there is a disruption in communication or a malfunction within the module itself. This can lead to a cascade of failures in the systems it controls, such as malfunctioning lights, inoperative windows, or failure of the central locking system.
OBDII Code U1700 RAM - Body Control Module Signal Invalid
U1700 RAM Code - Body Control Module Signal Invalid

Common Causes of U1700 RAM

  1. Faulty Body Control Module (BCM)
  2. Body Control Module harness is open or shorted
  3. Body Control Module circuit poor electrical connection
  4. Corroded or damaged connectors related to the BCM
  5. Software issues or programming errors within the BCM

Symptoms of U1700 RAM

  1. Engine Light ON (or Service Engine Soon Warning Light)
  2. Malfunctioning exterior and interior lights
  3. Power windows not operating correctly
  4. Central locking system failure
  5. Inoperative wipers or washers

How to Fix U1700 RAM

  1. Perform a thorough visual inspection of the BCM and its wiring harness for signs of damage or corrosion.
  2. Test the BCM with a diagnostic scanner to confirm the presence of the U1700 code and check for any additional codes.
  3. Repair or replace any damaged wiring or connectors associated with the BCM.
  4. If the BCM is found to be faulty, replace it with a new or refurbished unit, ensuring proper programming and configuration.
  5. Clear the diagnostic trouble codes and perform a road test to verify that all systems are functioning correctly.

Cost to Fix U1700 RAM

The cost to diagnose and repair a U1700 code can vary significantly based on the specific issue and the vehicle make and model. Typical parts and labor costs range from $200 to $1,000, depending on whether the BCM needs to be replaced or if there are simpler wiring issues to address. Labor rates typically range from $80 to $150 per hour, with dealerships often charging more than independent shops. It's advisable to obtain a detailed estimate from a qualified technician to understand the specific costs associated with your vehicle.

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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.

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