FAULTBASE
Error CodesASKCars
© 2025 FAULTBASE
All rights reserved.
v2.0.0 • Production
ContactPrivacyImpressum
Home/Cars/Renault/Clio/V (2019-Present)/how to troubleshoot the CAN bus communication issues in my Renault Clio V

how to troubleshoot the CAN bus communication issues in my Renault Clio V

Renault Clio V (2019-Present)

Error Codes
Severity: highDifficulty: medium2-4 hours
3 min read
517 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to troubleshoot CAN bus communication issues in Renault Clio V. Step-by-step guide with diagnostic procedures and repair instructions.

Component
Electrical
Repair Time
2-4 hours

Safety Warnings

  • ⚠Disconnect the battery before working on electrical systems to prevent short circuits

Symptoms

  • •Multiple warning lights illuminated on the dashboard
  • •Inconsistent or non-functional electronic components (e.g., power windows, central locking)
  • •Error messages displayed on the dashboard
  • •Difficulty in starting the vehicle
  • •Poor communication with diagnostic tools
  • •Intermittent loss of functionality in various systems (e.g., ABS, air conditioning)

Diagnostic Steps

  1. 1Inspect the vehicle's battery voltage; ensure it is within the normal range (12.4V - 12.7V)
  2. 2Use an OBD-II scanner to check for any stored error codes related to CAN bus communication
  3. 3Visually inspect the CAN bus wiring and connectors for any signs of damage or corrosion
  4. 4Measure the resistance of the CAN bus wires using a multimeter to ensure proper continuity
  5. 5Check for short circuits or open circuits in the CAN bus lines
  6. 6Verify the termination resistors at both ends of the CAN bus network to ensure they are present and functioning (typically 120 ohms)

Solution

Solution

1. Preparation

  • Gather necessary tools and parts.
  • Disconnect the battery to prevent any electrical shorts during repair.

Tools Required:

  • OBD-II scanner
  • Multimeter
  • Socket set
  • Torque wrench

2. Inspect and Repair Wiring

  • Sub-step 1: Remove any covering or protective sleeves to access the CAN bus wiring.
  • Sub-step 2: Inspect all wiring for frays, cuts, or corrosion. Repair any damaged wiring by splicing or replacing as necessary.
  • Sub-step 3: Ensure all connectors are clean and securely connected. Clean and apply contact cleaner if needed.

3. Check and Replace Termination Resistors

  • Sub-step 1: Locate the termination resistors on the CAN bus lines, typically at the ECU and BCM.
  • Sub-step 2: Measure the resistance of each termination resistor to ensure it is approximately 120 ohms.
  • Sub-step 3: If the resistor is faulty, replace it with an OEM part.

4. Reconnect Battery and Test

  • Sub-step 1: Reconnect the battery terminals ensuring tight connections.
  • Sub-step 2: Use the OBD-II scanner to clear any error codes and perform a system scan.
  • Sub-step 3: Test the vehicle systems to confirm functionality, ensuring all electronic components operate correctly.

Verification

After completing the repair, verify that the issue has been resolved:

  • Test the affected component to ensure it functions correctly
  • Check for any error codes or warning lights
  • Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

  • •Follow the manufacturer's recommended maintenance schedule
  • •Address warning signs early before they develop into major issues
  • •Use quality parts and fluids recommended for your vehicle
  • •Keep detailed records of all repairs and maintenance

Tools & Equipment Required

  • OBD-II scanner
  • Multimeter
  • Socket set
  • Torque wrench

Parts Required

  • Replacement CAN bus wiring (if damaged)
  • Termination resistors (if faulty)

Additional Information

Component

Electrical

Repair Time

2-4 hours

Difficulty

medium

Severity

high

Tools

4 items

Parts

2 items

Related Faults

  1. my Renault Clio V's engine light is flashing, is it serious?

    Learn how to diagnose and fix a flashing engine light issue in Renault Clio V. Step-by-step guide with diagnostic procedures and repair instructions.

    Engine6 symptoms

  2. how to fix the P0456 code on my Renault Clio V (2019-Present)?

    Learn how to diagnose and fix P0456 EVAP leak in Renault Clio V. Step-by-step guide with diagnostic procedures and repair instructions.

    P0456Fuel System5 symptoms

  3. my Renault Clio V's traction control light is on, what should I do?

    Learn how to diagnose and fix traction control light issues in Renault Clio V. Step-by-step guide with diagnostic procedures and repair instructions.

    Brakes5 symptoms

  4. how to fix the door ajar sensor issue in my Renault Clio V

    Learn how to diagnose and fix the door ajar sensor issue in Renault Clio V. Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

    Electrical5 symptoms

  5. how to resolve a U-code communication issue in my Renault Clio V (2019-Present)?

    Learn how to diagnose and fix U-code communication issues in Renault Clio V. Step-by-step guide with diagnostic procedures and repair instructions.

    Electrical5 symptoms

  6. why does my Renault Clio V (2019-Present) have a rough idle on cold starts

    Learn how to diagnose and fix rough idle issues during cold starts in Renault Clio V. Step-by-step guide with diagnostic procedures and repair instructions.

    Engine6 symptoms

Share this solution

Comments

Sign in to share your thoughts

Sign In

No comments yet

Be the first to share your thoughts

Back to Generation