B1771 Passenger Side Buckle Switch Circuit Malfunction

OBD2 Code: B1771

Description: Passenger side buckle switch circuit malfunction.

Definition: The OBD2 code B1771 indicates a problem in the electrical circuit of the passenger side seat belt buckle switch. This may involve issues such as an open or shorted circuit, poor electrical connections, or a faulty buckle switch itself. The malfunction can affect the operation of the airbag system and should be diagnosed and repaired promptly to ensure passenger safety.

B1771 – Passenger Side Buckle Switch Circuit Malfunction

Typical Severity: Moderate

Common Causes

B1771 – Passenger Side Buckle Switch Circuit Malfunction

Common Causes:

• Faulty passenger side buckle switch
• Wiring issues in the circuit
• Poor electrical connection in the circuit
• Corrosion or damage to connectors related to the buckle switch circuit
• Issues with the airbag control module

Common Misdiagnosis

OBD2 Code: B1771

Description: Passenger Side Buckle Switch Circuit Malfunction

Common Misdiagnosis: Replacing the passenger side buckle switch without checking for wiring issues or connector problems.

Common Diagnostic Steps

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OBD2 Code: B1771

Description: Passenger Side Buckle Switch Circuit Malfunction

• Check for any stored codes and freeze frame data using an OBD2 scanner.
• Inspect the passenger side buckle switch for physical damage or wear.
• Examine the wiring and connectors related to the buckle switch for signs of corrosion, damage, or disconnection.
• Test the continuity of the buckle switch circuit using a multimeter.
• If applicable, check for Technical Service Bulletins (TSBs) related to this issue.
• Replace or repair any damaged components as necessary.
• Clear the code and test drive to see if it returns.