WOMS
B code body Medium severity

B1698 Mirror Driver/Passenger Switch Circuit Short To Ground

The OBD2 code B1698 indicates a short circuit to ground in the driver or passenger mirror switch circuit, which may affect the operation of the mirror adjustment features

Definition

The OBD2 code B1698 indicates a short circuit to ground in the driver or passenger mirror switch circuit, which may affect the operation of the mirror adjustment features

Common causes

  • Damaged wiring or connectors
  • Faulty mirror switch
  • Shorted circuit in the mirror assembly
  • Corroded connections
  • Water intrusion or moisture damage
  • Faulty body control module (BCM)

Common misdiagnoses

  • Faulty mirror switch
  • Wiring harness issues
  • Shorted wiring
  • Faulty body control module (BCM)
  • Defective mirror motor
  • Grounding issues
  • Faulty door control module
  • Incorrectly installed aftermarket accessories

Troubleshooting steps

  1. 1. Check for Additional Codes

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

  2. 2. Inspect the Wiring and Connectors

    Visual Inspection: Check the wiring harness and connectors associated with the mirror switch for any signs of damage, such as fraying, corrosion, or loose connections

  3. 3. Ground Connections

    Ensure that all ground connections are secure and free of corrosion

  4. 4. Test the Mirror Switch

    Functionality Test: Manually test the mirror switch to ensure it is functioning correctly. You can do this by checking for continuity in the switch when it is activated

  5. 5. Resistance Check

    Use a multimeter to measure the resistance across the switch terminals. Compare the readings to the manufacturer’s specifications

  6. 6. Check for Short Circuits

    Continuity Test: With the vehicle off, use a multimeter to check for continuity between the mirror switch circuit and ground. A short to ground will show continuity where there should be none

  7. 7. Inspect for Pinched Wires

    Look for any pinched or damaged wires that could be causing a short circuit

  8. 8. Inspect the Mirror Assembly

    If the vehicle has powered mirrors, check the mirror assembly for any signs of damage or malfunction that could be causing a short

  9. 9. Check the Body Control Module (BCM)

    The BCM often controls the mirror functions. Inspect the BCM for any faults or issues. If necessary, perform a reset or reprogramming according to the manufacturer’s guidelines

  10. 10. Test Related Components

    If applicable, test any related components, such as the mirror motors or additional switches, to ensure they are functioning correctly

  11. 11. Repair or Replace Faulty Components

    Based on your findings, repair or replace any damaged wiring, connectors, or components

  12. 12. Clear the Codes and Test Drive

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

  13. 13. Seek Professional Help

    If you are unable to resolve the issue, consider seeking assistance from a professional mechanic or automotive technician who has experience with electrical systems. By following these steps, you should be able to identify and address the cause of the B1698 code effectively