Check the CAN communication with control unit N80 (Steering column module)

In this blog post, I will show you how to check the CAN communication with control unit N80 (Steering column module) in your car. This is a useful diagnostic procedure that can help you identify and fix any issues with the steering system.

The CAN (Controller Area Network) is a serial communication protocol that allows different electronic devices in your car to communicate with each other. The control unit N80 is responsible for controlling the steering column functions, such as the steering angle sensor, the turn signal switch, and the steering lock.

To check the CAN communication with control unit N80, you will need a scan tool that can access the CAN bus and read the data from the control unit. You will also need to locate the CAN connector in your car, which is usually under the dashboard or near the fuse box.

The steps to check the CAN communication with control unit N80 are as follows:

1. Connect the scan tool to the CAN connector and turn on the ignition.

2. Select the control unit N80 from the scan tool menu and read the fault codes. If there are any fault codes related to the CAN communication, such as U0001 or U0100, it means that there is a problem with the wiring or the control unit itself.

3. Clear the fault codes and perform a communication test. The scan tool will send a test signal to the control unit N80 and wait for a response. If there is no response or an incorrect response, it means that there is a problem with the CAN communication.

4. Check the wiring and connectors between the CAN connector and the control unit N80. Look for any signs of damage, corrosion, or loose connections. Repair or replace any faulty wires or connectors as needed.

5. Check the power supply and ground of the control unit N80. Use a multimeter to measure the voltage and resistance of the power and ground wires. The voltage should be between 11 and 14 volts and the resistance should be less than 1 ohm. If not, there may be a problem with the fuse, relay, or wiring.

6. Check the internal components of the control unit N80. If everything else is fine, there may be a problem with the control unit itself. You can try to reprogram or replace it as needed.

By following these steps, you can check the CAN communication with control unit N80 and troubleshoot any issues with your steering system. I hope you found this blog post helpful and informative. If you have any questions or comments, please feel free to leave them below.