how to diagnose CAN bus communication errors in Renault Clio V (2019-Present)

Solution

1. Preparation

• Gather tools: OBD-II scanner, multimeter, wiring diagrams, and basic hand tools.
• Disconnect the vehicle battery to ensure safety while working on electrical systems.

2. Inspect and Repair Wiring

• Step 1: Remove any protective covers to access the CAN bus wiring.
• Step 2: Check for frayed wires, breaks, or shorts.
• Step 3: Repair or replace any damaged wiring as necessary, ensuring proper insulation and securing of connections.

3. Replace Termination Resistors (if needed)

• Step 1: Identify the location of the CAN bus termination resistors in the vehicle wiring diagram.
• Step 2: Remove the old termination resistors carefully.
• Step 3: Install new termination resistors ensuring they meet the manufacturer's specifications (typically 120 ohms).

4. Reconnect Components

• Step 1: Reconnect all connectors and wiring that were previously disconnected or inspected.
• Step 2: Ensure all connections are secure and free of corrosion.

5. Reconnect Battery

• Reconnect the vehicle battery ensuring proper terminal connection.

6. Clear Error Codes and Test Drive

• Step 1: Use the OBD-II scanner to clear any stored error codes.
• Step 2: Perform a test drive to confirm that the CAN bus communication issues have been resolved.