WOMS
C code chassis Medium severity

C0359 Four Wheel Drive Low Range (4LO) Discrete Output Circuit

The OBD2 code C0359 indicates a malfunction in the Four Wheel Drive Low Range (4LO) discrete output circuit, which may affect the operation of the vehicle's four-wheel drive system

Definition

The OBD2 code C0359 indicates a malfunction in the Four Wheel Drive Low Range (4LO) discrete output circuit, which may affect the operation of the vehicle's four-wheel drive system

Common causes

  • Faulty 4LO switch
  • Damaged wiring or connectors
  • Short circuit in the circuit
  • Open circuit in the circuit
  • Faulty transfer case control module
  • Malfunctioning four-wheel drive system
  • Corroded terminals or connections

Common misdiagnoses

  • Faulty transfer case control module
  • Defective wiring or connectors
  • Malfunctioning four-wheel drive switch
  • Issues with the transfer case motor
  • Incorrectly diagnosed transmission problems
  • Problems with the vehicle's battery or charging system
  • Faulty ground connections
  • Misinterpretation of other related codes

Troubleshooting steps

  1. 1. Check the Vehicle's Manual

    Refer to the vehicle's service manual for specific information related to the 4LO system and the C0359 code. This can provide insights into the circuit layout and component locations

  2. 2. Visual Inspection

    Wiring and Connectors: Inspect the wiring harness and connectors associated with the 4LO system for any signs of damage, corrosion, or loose connections

  3. 3. Fuses

    Check the relevant fuses in the fuse box to ensure they are not blown

  4. 4. Scan Tool Diagnosis

    Use an OBD-II scanner to read the code and any related codes. This can provide additional context for the issue

  5. 5. Clear the code and see if it returns after a test drive. If it does, it confirms an ongoing issue

  6. 6. Check the 4WD System

    Switch Operation: Test the 4LO switch to ensure it is functioning correctly. A faulty switch can send incorrect signals to the control module

  7. 7. Transfer Case

    Inspect the transfer case for proper operation. Ensure that it engages and disengages correctly

  8. 8. Test the Discrete Output Circuit

    Use a multimeter to test the voltage and continuity of the discrete output circuit. Check for proper voltage when the 4LO is engaged

  9. 9. If there is no voltage or continuity, trace the circuit back to find any breaks or shorts

  10. 10. Check the Control Module

    Inspect the 4WD control module for any signs of damage or malfunction. If necessary, test the module according to the manufacturer’s specifications

  11. 11. Reprogram or replace the control module if it is found to be faulty

  12. 12. Check for Ground Issues

    Ensure that all ground connections related to the 4WD system are secure and free of corrosion. Poor grounding can lead to erratic behavior

  13. 13. Test Related Components

    If applicable, test other components related to the 4WD system, such as sensors or actuators, to ensure they are functioning correctly

  14. 14. Consult Technical Service Bulletins (TSBs)

    Look for any TSBs related to the C0359 code or the 4WD system for your specific vehicle make and model. Manufacturers may have issued guidance on common issues and fixes

  15. 15. Professional Diagnosis

    If the issue persists after performing the above steps, consider seeking help from a professional mechanic or dealership. They may have specialized tools and knowledge to diagnose complex issues.Conclusion By following these troubleshooting steps, you can systematically identify and address the cause of the C0359 code. Always ensure safety precautions are taken when working on vehicle electrical systems