B1680 – Alarm Panic Input Circuit Short To Ground

The ODBII code B1680 indicates a malfunction in the alarm panic input circuit, specifically that there is a short to ground in the circuit, which may prevent the alarm system from functioning properly.

The severity of ODBII code B1680 is generally considered low.

Common Causes For: B1679 Alarm Panic Input Circuit Short To Battery

• Shorted wiring or connectors
• Faulty alarm system components
• Damaged or corroded connectors
• Grounding issues
• Malfunctioning body control module (BCM)
• Incorrectly installed aftermarket alarm system
• Water intrusion or moisture damage

Common misdiagnosis for B1680 Alarm Panic Input Circuit Short To Ground

• Faulty alarm system
• Defective wiring or connectors
• Malfunctioning body control module (BCM)
• Shorted or damaged harness
• Incorrectly installed aftermarket alarm system
• Faulty key fob or remote
• Issues with the vehicle’s central locking system

Common Troubleshooting Steps

When dealing with an OBD-II code B1680, which indicates an “Alarm Panic Input 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 the Vehicle’s Manual: Refer to the vehicle’s service manual for specific information related to the B1680 code, including wiring diagrams and component locations.
• Visual Inspection: Inspect the wiring and connectors associated with the alarm panic input circuit. Look for:
• Damaged, frayed, or corroded wires.
• Loose or disconnected connectors.
• Signs of moisture or dirt that could cause a short.
• Check for Shorts to Ground: Use a multimeter to check for continuity between the alarm panic input circuit and ground. If there is continuity, it indicates a short to ground.
• Inspect the circuit for any pinched or damaged wires that may be making contact with the vehicle chassis.
• Test the Alarm System: If the vehicle is equipped with an aftermarket alarm system, ensure that it is installed correctly. A faulty or improperly installed alarm system can cause this code.
• Temporarily disconnect the alarm system to see if the code clears. If it does, the issue may lie within the alarm system itself.
• Check the Alarm Panic Switch: Inspect the panic switch for proper operation. If the switch is stuck or malfunctioning, it may cause the circuit to short to ground.
• Test the switch with a multimeter to ensure it opens and closes correctly.
• Inspect Related Components: Check other components that may be connected to the alarm system, such as door switches, body control modules, or other sensors that may influence the alarm circuit.
• Scan for Additional Codes: Use an OBD-II scanner to check for any additional trouble codes that may provide more context or indicate related issues.
• Clear the Code and Test Drive: After performing inspections and repairs, clear the code using an OBD-II scanner and take the vehicle for a test drive to see if the code returns.
• Consult a Professional: If the issue persists after performing these steps, it may be necessary to consult a professional mechanic or an automotive electrician for further diagnosis.
• Document Findings: Keep a record of any findings, repairs made, and codes cleared. This documentation can be helpful for future reference or if professional assistance is needed. By following these steps, you should be able to identify and resolve the issue related to the B1680 code. Always ensure safety precautions are taken when working on vehicle electrical systems.