WOMS
C code chassis Medium severity

C1105 Traction Control Disable Lamp - Circuit Short to Battery

The OBD2 code C1105 indicates a malfunction in the traction control system, specifically that the traction control disable lamp circuit is shorted to the battery, which may prevent the lamp from functioning properly

Definition

The OBD2 code C1105 indicates a malfunction in the traction control system, specifically that the traction control disable lamp circuit is shorted to the battery, which may prevent the lamp from functioning properly

Common causes

  • Shorted wiring or connectors
  • Faulty traction control disable switch
  • Malfunctioning traction control module
  • Corroded or damaged electrical connections
  • Faulty battery or power supply issues
  • Software or calibration issues in the vehicle's control module

Common misdiagnoses

  • Faulty traction control module
  • Defective brake switch
  • Wiring issues or shorts in the harness
  • Malfunctioning ABS module
  • Bad ground connections
  • Incorrectly installed aftermarket components
  • Faulty dashboard indicator light
  • Issues with the powertrain control module (PCM)

Troubleshooting steps

  1. 1. Check the Vehicle's Battery and Charging System

    Inspect Battery Voltage: Ensure the battery is fully charged and in good condition. A weak battery can cause various electrical issues

  2. 2. Check Alternator Output

    Verify that the alternator is functioning properly and providing adequate voltage

  3. 3. Visual Inspection

    Inspect Wiring and Connectors: Look for damaged, frayed, or corroded wires and connectors related to the traction control system and the disable lamp circuit

  4. 4. Check for Shorts

    Look for any signs of short circuits, such as exposed wires that may be touching the chassis or other components

  5. 5. Scan for Additional Codes

    Use an OBD-II Scanner: Check for any other related trouble codes that may provide more context or indicate other issues within the traction control system

  6. 6. Test the Traction Control Disable Lamp Circuit

    Check Continuity: Use a multimeter to check for continuity in the circuit. Ensure there are no breaks or shorts in the wiring

  7. 7. Measure Voltage

    With the ignition on, measure the voltage at the traction control disable lamp circuit to see if it is receiving the correct voltage

  8. 8. Inspect the Traction Control Module

    Check for Faulty Module: If the wiring and connections are intact, the traction control module itself may be faulty. Inspect for any signs of damage or corrosion

  9. 9. Reprogram or Reset Module

    In some cases, reprogramming or resetting the module may resolve the issue

  10. 10. Check Related Components

    Inspect Switches and Sensors: Check the traction control disable switch and any related sensors for proper operation. A faulty switch could cause the circuit to short to battery

  11. 11. Look for Ground Issues

    Ensure that all ground connections related to the traction control system are secure and free of corrosion

  12. 12. Consult Wiring Diagrams

    Refer to Service Manual: Use the vehicle’s service manual to consult wiring diagrams for the traction control system. This can help identify the specific components involved in the circuit

  13. 13. Perform a System Reset

    Clear Codes: After addressing any issues, clear the trouble codes using the OBD-II scanner and take the vehicle for a test drive to see if the code returns

  14. 14. Seek Professional Help

    If the issue persists after performing these steps, it may be necessary to consult a professional mechanic or technician who has experience with the specific vehicle make and model. By following these troubleshooting steps, you should be able to identify and resolve the issue related to the C1105 code. Always ensure safety precautions are taken when working on vehicle electrical systems