OIC 520542.03 – CAN Bus +, Voltage Too High

OIC 520542.03 (OIC 542.03)

Code: 520542.03

Shortcode: 542.03

Description:

This error code indicates that the voltage of CAN+ is too high, suggesting a short to 12 volts.

Reaction:

The control software may function in a limited capacity or not at all, affecting CAN Bus communication and overall vehicle operation.

Recommendations:

Inspect CAN Bus + Connections:

  • Check the wiring and connections of the CAN+ lead for signs of damage, loose connections, or corrosion. Repair or replace any faulty components.

Test Voltage Levels:

  • Use a multimeter to measure the voltage of the CAN+ lead. Ensure it remains within the specified range. If it is too high, investigate the power source for faults.

Check for Shorts:

  • Inspect for any short circuits to 12 volts along the CAN+ wiring. Repair any identified shorts.

Update Control Software:

  • Ensure that the control software is updated to the latest version. Firmware updates might include improvements in handling CAN Bus voltage levels.

Consult Manufacturer Support:

  • If the issue persists, consult technical support or the manufacturer for further diagnostics and assistance.

Monitor System Performance:

  • After addressing the issue, monitor the system to ensure the CAN+ voltage remains within the specified range and the error does not recur.

Note:

Maintaining proper voltage levels in the CAN Bus is crucial for reliable communication. Regular checks and maintenance can prevent voltage-related issues.


Control Units: John Deere

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