WOMS
B code body Medium severity

B1340 Chime Input Request Circuit Short To Ground

The OBD2 code B1340 indicates a malfunction in the chime input request circuit, specifically that there is a short to ground in the circuit, which may prevent the chime from functioning properly

Definition

The OBD2 code B1340 indicates a malfunction in the chime input request circuit, specifically that there is a short to ground in the circuit, which may prevent the chime from functioning properly

Common causes

  • Damaged wiring or connectors in the chime input circuit
  • Short circuit in the chime input circuit
  • Faulty chime module
  • Malfunctioning ignition switch
  • Corroded or loose ground connections
  • Faulty body control module (BCM)

Common misdiagnoses

  • Faulty chime module
  • Shorted wiring harness
  • Defective ignition switch
  • Malfunctioning body control module (BCM)
  • Bad ground connections
  • Incorrectly installed aftermarket accessories
  • Faulty door switch
  • Wiring issues in the dashboard or instrument cluster

Troubleshooting steps

  1. 1. Check the Vehicle's Manual

    Refer to the vehicle's service manual for specific information about the chime input circuit and its components. This can provide valuable insights into the wiring diagrams and component locations

  2. 2. Visual Inspection

  3. 3. Inspect the wiring harness and connectors associated with the chime input circuit for any visible damage, fraying, or corrosion

  4. 4. Look for any signs of wear or shorting, such as exposed wires that may be touching the vehicle's chassis or other components

  5. 5. Check for Shorts

  6. 6. Use a multimeter to check for continuity in the chime input circuit. Disconnect the battery and the relevant connectors, then test the circuit for continuity to ground

  7. 7. If you find continuity where there shouldn't be any, you likely have a short to ground that needs to be located and repaired

  8. 8. Inspect the Chime Module

  9. 9. If applicable, locate the chime module (or chime relay) and inspect it for damage or malfunction. Ensure that it is properly connected and functioning

  10. 10. Test the module according to the manufacturer's specifications to ensure it is working correctly

  11. 11. Check Related Components

  12. 12. Investigate any other components that may be connected to the chime input circuit, such as door switches, seatbelt reminders, or other warning systems. A malfunction in one of these components could affect the chime circuit

  13. 13. Scan for Additional Codes

  14. 14. Use an OBD-II scanner to check for any additional trouble codes that may be present. Other codes could provide clues about related issues that may be causing the B1340 code

  15. 15. Repair or Replace Faulty Components

  16. 16. Based on your findings, repair any damaged wiring or connectors. If the chime module or any related components are faulty, replace them as necessary

  17. 17. Clear the Codes

  18. 18. After making repairs, clear the trouble codes using an OBD-II scanner and take the vehicle for a test drive to see if the code returns

  19. 19. Consult a Professional

  20. 20. If you are unable to locate the issue or if the problem persists after your troubleshooting, it may be best to consult a professional mechanic or technician who has experience with automotive electrical systems. By following these steps, you should be able to diagnose and resolve the issue related to the B1340 code. Always ensure safety precautions are taken when working with electrical systems in vehicles