B1682 – PATS Is Disabled (Check Link Between PATS And Transponder)

The ODBII code B1682 indicates that the Passive Anti-Theft System (PATS) is disabled due to a communication issue between the PATS module and the transponder key.

The severity of ODBII code B1682 is typically considered moderate to high.

Common Causes For: B1681 PATS Transceiver Module Signal Is Not Received

• Faulty transponder key
• Damaged or corroded wiring
• Poor connection at the PATS module
• Malfunctioning PATS module
• Faulty ignition switch
• Issues with the vehicle’s PCM (Powertrain Control Module)
• Incorrectly programmed key or transponder
• Interference from aftermarket devices or modifications

Common misdiagnosis for B1682 PATS Is Disabled (Check Link Between PATS And Transponder)

• Faulty key or transponder
• Ignition switch issues
• Wiring or connector problems
• Body control module (BCM) failure
• Instrument cluster malfunction
• PCM (Powertrain Control Module) issues
• Incorrectly programmed key
• Faulty PATS module
• Battery or power supply issues
• Software glitches or updates needed

Common Troubleshooting Steps

When dealing with OBD-II code B1682, which indicates that the Passive Anti-Theft System (PATS) is disabled and there may be an issue with the link between the PATS and the transponder, you can follow these common troubleshooting steps:

• Check for Additional Codes: Use an OBD-II scanner to check for any additional trouble codes that may provide more context or indicate related issues.
• Inspect the Key and Transponder: Ensure that the key being used is the correct one for the vehicle and that it has a functioning transponder chip.
• Check for physical damage to the key or transponder.
• Examine the Ignition Cylinder: Inspect the ignition cylinder for wear or damage that could prevent proper communication with the transponder.
• Check Wiring and Connectors: Inspect the wiring and connectors related to the PATS system for any signs of damage, corrosion, or loose connections.
• Pay special attention to the connections between the PATS module and the transponder.
• Test the PATS Module: If possible, test the PATS module for proper operation. This may require specialized diagnostic equipment or tools.
• Check for Interference: Ensure that there are no electronic devices or aftermarket accessories that could be interfering with the PATS system.
• Battery Voltage: Check the vehicle’s battery voltage. A weak or failing battery can cause communication issues within the PATS system.
• Reprogram the Key/Transponder: If the key is not recognized, you may need to reprogram the key or transponder to the vehicle. This often requires specialized equipment or a visit to a dealership.
• Inspect the PCM (Powertrain Control Module): Check for any issues with the PCM, as it plays a role in the PATS system. Look for signs of damage or failure.
• Consult Technical Service Bulletins (TSBs): Look for any TSBs related to the PATS system for your specific vehicle make and model. There may be known issues or recalls that could apply.1
• Perform a System Reset: In some cases, disconnecting the battery for a short period may reset the system and clear the code. However, this should be done with caution, as it may also reset other systems.1
• Seek Professional Help: If the issue persists after performing the above steps, it may be necessary to consult a professional mechanic or dealership with experience in PATS systems for further diagnosis and repair.Conclusion Always refer to the vehicle’s service manual for specific procedures and specifications related to the PATS system. Proper diagnosis is crucial to avoid unnecessary repairs and ensure the issue is resolved effectively.