P1695 Code: Complete DIY Repair Guide

The P1695 trouble code is an OBD-II diagnostic code that indicates a communication issue between the Body Control Module (BCM) and the Powertrain Control Module (PCM). Specifically, it signifies “No CCD/J1850 messages received from the body control module.” This can lead to various electrical malfunctions in the vehicle, as the BCM is responsible for managing several critical systems, including lighting, instrumentation, and more. Understanding this code is essential for vehicle owners and DIY mechanics seeking to troubleshoot and resolve related issues effectively.

Symptoms of P1695 Code

When the P1695 code is triggered, vehicle owners may experience a range of symptoms, including:

• Inoperative Instrument Cluster: The dashboard may display erratic readings or fail to show information altogether.
• Malfunctioning Warning Lights: Warning lights may illuminate unexpectedly or remain lit without cause.
• Electrical System Failures: Issues with lighting, power windows, locks, and other electronic components may arise.
• Intermittent Starting Problems: The vehicle may have difficulty starting or exhibit strange behavior when attempting to start.

Technical Explanations

The P1695 code relates to the communication protocols used in modern vehicles. The CCD (Chrysler Collision Data) and J1850 protocols are standard communication methods that allow different vehicle modules to exchange data. When these messages are not received as expected, it can indicate a fault in one of the modules or a break in communication due to wiring issues.

Understanding the Modules Involved

• Body Control Module (BCM): This module manages various electronic functions within the vehicle. It communicates with other modules using specific protocols.
• Powertrain Control Module (PCM): This module controls engine performance and transmission functions. It relies on data from the BCM to operate efficiently.

Step-by-Step Diagnosis

To diagnose a P1695 code effectively, follow these steps:

1. Check for Additional Codes: Use an OBD-II scanner to check for other trouble codes that may provide more context.
2. Inspect Wiring and Connectors:

• Look for damaged wires or corroded connectors between the BCM and PCM.
• Ensure all connections are secure and free from dirt or corrosion.

1. Test Modules:

• Verify that both the BCM and PCM are functioning correctly.
• If possible, use a scan tool to check live data from both modules.

1. Perform a Visual Inspection:

• Examine the vehicle’s wiring harness for any signs of wear or damage.
• Pay special attention to areas where wires may rub against metal surfaces.

1. Check for Software Updates:

• Consult with a dealership or manufacturer for any software updates that may address known issues with communication between modules.

Solution Methods

Once diagnosed, there are several methods to resolve a P1695 code:

• Repair Wiring Issues: If damaged wiring is found, repair or replace it as necessary. Ensure all connectors are clean and secure.
• Replace Faulty Modules: If either the BCM or PCM is determined to be faulty after testing, replacement may be required.
• Reprogram Modules: In some cases, reprogramming the BCM or PCM can resolve communication errors. This typically requires specialized equipment.
• Clear Codes and Test Drive: After repairs are made, clear the trouble codes using an OBD-II scanner and take the vehicle for a test drive to ensure that the issue does not return.

Cost Estimates

The cost of diagnosing and repairing a P1695 code can vary widely based on several factors:

• Diagnostic Fees: Expect to pay between $100-$150 for a professional diagnostic service at a dealership or repair shop.
• Wiring Repairs: Simple wiring repairs can range from $50-$200 depending on labor costs and parts needed.
• Module Replacement: Replacing a BCM can cost anywhere from $200-$600, while a PCM replacement might range from $300-$800 including programming fees.

Warnings and Recommendations

• Professional Help Recommended: If you are not comfortable working with automotive electronics, it is advisable to seek professional help.
• Safety First: Always disconnect the battery before working on electrical systems to avoid short circuits or shocks.
• Avoid Guesswork: Diagnosing electrical issues can be complex; avoid replacing parts without proper testing as this can lead to unnecessary expenses.

Closing Paragraph

The P1695 trouble code represents a significant issue related to vehicle communication systems that can affect multiple functionalities within your car. By understanding its meaning, symptoms, causes, and solutions, vehicle owners and DIY mechanics can approach repairs with confidence. Always prioritize safety and consider professional assistance if needed to ensure your vehicle operates reliably.

Frequently Asked Questions About P1695

• What does P1695 mean?
  The P1695 code indicates a communication failure between the Body Control Module (BCM) and Powertrain Control Module (PCM).
• What are common symptoms of this code?
  Symptoms include inoperative instrument clusters, malfunctioning warning lights, and intermittent starting problems.
• How do I diagnose this issue?
  Start by checking for additional trouble codes, inspecting wiring and connectors, testing modules, and performing visual inspections.
• Can I fix this problem myself?
  Yes, if you have experience with automotive electronics; however, professional help is recommended for complex issues.
• What tools do I need for diagnosis?
  An OBD-II scanner is essential for reading codes and live data from your vehicle’s modules.
• How much will it cost to repair?
  The total cost can range from $100 for diagnostics up to $800 for module replacements.
• Is this issue dangerous?
  While not immediately dangerous, unresolved issues can lead to more significant electrical failures affecting vehicle safety.
• When should I seek professional help?
  If you are unsure about diagnosing or repairing electrical systems, it’s best to consult a qualified technician.