B1698 – Mirror Driver/Passenger Switch Circuit Short To Ground

The ODBII 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.

The severity of ODBII code B1698 is generally considered moderate.

Common Causes For: B1697 Mirror Driver/Passenger Switch Circuit Short To Battery

• 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 misdiagnosis for B1698 Mirror Driver/Passenger Switch Circuit Short To Ground

• 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

Common Troubleshooting Steps

When dealing with OBD-II code B1698, which indicates a “Mirror Driver/Passenger Switch Circuit Short To Ground,” there are several common troubleshooting steps you can follow to diagnose and potentially resolve the issue. Here’s a structured approach:

• 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.
• 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.
• **Ground Connections: Ensure that all ground connections are secure and free of corrosion.
• 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.
• **Resistance Check: Use a multimeter to measure the resistance across the switch terminals. Compare the readings to the manufacturer’s specifications.
• 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.
• **Inspect for Pinched Wires: Look for any pinched or damaged wires that could be causing a short circuit.
• 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.
• 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.
• Test Related Components: If applicable, test any related components, such as the mirror motors or additional switches, to ensure they are functioning correctly.
• Repair or Replace Faulty Components: Based on your findings, repair or replace any damaged wiring, connectors, or components.
• 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.
• Consult Service Manual: If the issue persists, consult the vehicle’s service manual for specific diagnostic procedures and wiring diagrams related to the mirror switch circuit.1
• 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.