WOMS
U code network High severity

U1159 Lost Communication with Instrument Cluster (IC) Control Module

The OBD2 code U1159 indicates that there is a communication failure between the vehicle's control module and the instrument cluster, meaning the control module is unable to receive or send data to the instrument cluster

Definition

The OBD2 code U1159 indicates that there is a communication failure between the vehicle's control module and the instrument cluster, meaning the control module is unable to receive or send data to the instrument cluster

Common causes

  • Faulty Instrument Cluster Control Module
  • Damaged wiring or connectors
  • Poor ground connections
  • Faulty CAN bus communication
  • Corroded terminals
  • Malfunctioning power supply to the module
  • Software issues or bugs in the module
  • Intermittent electrical issues

Common misdiagnoses

  • Faulty Instrument Cluster
  • Bad Wiring or Connectors
  • Faulty Body Control Module (BCM)
  • Power Supply Issues
  • Faulty CAN Bus Communication
  • Defective ECU (Engine Control Unit)
  • Grounding Issues
  • Software Glitches or Updates Needed

Troubleshooting steps

  1. 1. Check for Additional Codes

    Use an OBD-II scanner to check for any other trouble codes that may be present. This can provide more context and help identify related issues

  2. 2. Inspect the Instrument Cluster

    Visual Inspection: Check the instrument cluster for any visible damage, such as cracks or burnt components

  3. 3. Connections

    Ensure that the connectors to the instrument cluster are secure and free of corrosion or damage

  4. 4. Check Wiring and Connectors

    Inspect the wiring harnesses and connectors leading to the instrument cluster for any signs of wear, fraying, or damage

  5. 5. Look for loose connections or broken wires that could interrupt communication

  6. 6. Test the Instrument Cluster

    If possible, perform a bench test on the instrument cluster to ensure it is functioning correctly

  7. 7. If you have access to a known good instrument cluster, consider swapping it temporarily to see if the issue persists

  8. 8. Check for Power and Ground

    Verify that the instrument cluster is receiving the correct voltage and ground. Use a multimeter to check for power at the cluster's connector

  9. 9. Ensure that the ground connections are solid and free of corrosion

  10. 10. Inspect the CAN Bus System

    The instrument cluster typically communicates over the CAN (Controller Area Network) bus. Check for any issues with the CAN bus wiring or other modules on the bus

  11. 11. Look for any short circuits or open circuits in the CAN bus wiring

  12. 12. Check for Software Issues

    Sometimes, a software glitch can cause communication issues. Check if there are any available software updates for the vehicle’s modules

  13. 13. If applicable, consider performing a reset or reprogramming of the instrument cluster

  14. 14. Scan for Module Communication

    Use a professional-grade scan tool to check the communication between the instrument cluster and other modules. This can help identify if the issue is isolated to the cluster or if other modules are affected

  15. 15. Inspect Related Modules

    Check other modules that communicate with the instrument cluster, such as the Body Control Module (BCM) or Engine Control Module (ECM), for any faults or communication issues

  16. 16. Consult Technical Service Bulletins (TSBs)

    Look for any TSBs related to the U1159 code or instrument cluster issues for your specific vehicle make and model. Manufacturers may have known fixes or recommendations.1

  17. 17. Professional Diagnosis

    If the issue persists after performing the above steps, consider seeking help from a professional mechanic or dealership. They may have access to specialized diagnostic tools and resources.Conclusion By following these troubleshooting steps, you can systematically identify and address the cause of the U1159 code. Always ensure safety precautions are taken when working on vehicle electronics, and consult the vehicle’s service manual for specific procedures related to your make and model