B1656 Seat Belt Buckle Switch Left Circuit Malfunction

OBD2 Code: B1656

Description: Seat belt buckle switch left circuit malfunction.

Definition: This code indicates a problem with the electrical circuit of the seat belt buckle switch on the left side. It means that there is an issue such as an open or short circuit, faulty wiring, or a defective seat belt buckle switch itself, which prevents proper communication between the seat belt system and the vehicle’s control module.

B1656 – Seat Belt Buckle Switch Left Circuit Malfunction

Typical Severity: Moderate

Common Causes

B1656 – Seat Belt Buckle Switch Left Circuit Malfunction

Common Causes:

• Faulty seat belt buckle switch
• Wiring or connector issues in the left seat belt buckle circuit
• Corrosion or damage to the wiring harness
• Defective body control module (BCM)

Common Misdiagnosis

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OBD2 Code: B1656

Description: Seat Belt Buckle Switch Left Circuit Malfunction

Common Misdiagnosis: Faulty seat belt buckle switch is often misdiagnosed as a wiring issue or a problem with the airbag control module.

Common Diagnostic Steps

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OBD2 Code: B1656

Description: Seat Belt Buckle Switch Left Circuit Malfunction

• Inspect the seat belt buckle switch for physical damage or wear.
• Check the wiring and connectors for any signs of corrosion, damage, or disconnection.
• Use a multimeter to test the continuity of the seat belt buckle switch circuit.
• Verify that there is proper voltage supply to the seat belt buckle switch.
• Examine related fuses and replace if necessary.
• If equipped, use an OBD2 scanner to clear the code and see if it returns after performing repairs.
• If issues persist, consider replacing the seat belt buckle switch assembly.