WOMS
U code network Medium severity

U0162 Lost Communication With Navigation Display Module

The OBD2 code U0162 indicates that there is a lost communication issue between the vehicle's control module and the navigation display module, suggesting a potential problem with wiring, connectors, or the module itself

Definition

The OBD2 code U0162 indicates that there is a lost communication issue between the vehicle's control module and the navigation display module, suggesting a potential problem with wiring, connectors, or the module itself

Common causes

  • Faulty navigation display module
  • Damaged wiring or connectors
  • Poor ground connection
  • Corroded or loose connectors
  • Software or firmware issues
  • Faulty vehicle communication network (CAN bus)
  • Power supply issues to the navigation module
  • Interference from aftermarket devices

Common misdiagnoses

  • Faulty wiring or connectors
  • Malfunctioning body control module (BCM)
  • Defective instrument cluster
  • Issues with the vehicle's battery or charging system
  • Problems with the infotainment system
  • Software glitches or updates needed
  • Faulty navigation display module itself
  • Communication issues with other modules (e.g., CAN bus problems)

Troubleshooting steps

  1. 1. Check for Other Codes

    Use an OBD-II scanner to check for any additional trouble codes. Sometimes, multiple codes can provide more context about the issue

  2. 2. Inspect Wiring and Connectors

    Visual Inspection: Check the wiring harness and connectors related to the navigation display module for any signs of damage, corrosion, or loose connections

  3. 3. Connector Pins

    Ensure that the pins in the connectors are not bent or corroded

  4. 4. Check Power and Ground

    Power Supply: Verify that the navigation display module is receiving the correct voltage. Use a multimeter to check the power supply at the module

  5. 5. Ground Connection

    Ensure that the ground connection is secure and free of corrosion

  6. 6. Test the Navigation Display Module

    If possible, test the navigation display module itself. This may involve swapping it with a known good unit or using diagnostic tools to check its functionality

  7. 7. Inspect the CAN Bus

    Communication Lines: Check the CAN bus wiring for continuity and shorts. The navigation display module communicates over the CAN bus, so any issues here can lead to communication loss

  8. 8. Termination Resistors

    Ensure that the CAN bus has the correct termination resistors in place

  9. 9. Check for Software Updates

    Sometimes, a software glitch can cause communication issues. Check with the manufacturer for any available software updates for the vehicle’s control modules

  10. 10. Reset the System

    Clear the trouble codes using an OBD-II scanner and see if the code returns. Sometimes, a temporary glitch can cause communication issues

  11. 11. Inspect Related Modules

    Check other modules that communicate with the navigation display module. If another module is malfunctioning, it could affect communication

  12. 12. Consult Technical Service Bulletins (TSBs)

    Look for any TSBs related to the navigation display module or communication issues for your specific vehicle make and model

  13. 13. Professional Diagnosis

    If the issue persists after performing the above steps, consider seeking help from a professional mechanic or dealership. They may have specialized diagnostic tools and experience with your vehicle.Conclusion By following these troubleshooting steps, you can systematically identify and resolve the issue related to the U0162 code. Always ensure safety precautions are taken when working on vehicle electronics