B1206 – EIC Switch-1 Assembly Circuit Open

The ODBII code B1206 EIC Switch-1 Assembly Circuit Open indicates a malfunction in the electrical circuit of the EIC (Electronic Ignition Control) switch, specifically that the circuit is open or not completing properly.

The severity of ODBII code B1206 EIC Switch-1 Assembly Circuit Open is moderate.

Common Causes For: B1205 EIC Switch-1 Assembly Circuit Failure

• Open circuit in the wiring harness
• Faulty EIC switch
• Poor electrical connections
• Damaged connectors
• Short circuit in the circuit
• Faulty body control module (BCM)

Common misdiagnosis for B1206 EIC Switch-1 Assembly Circuit Open

• Faulty body control module (BCM)
• Wiring issues or shorts in the harness
• Defective EIC switch or assembly
• Incorrectly diagnosed airbag system faults
• Misinterpretation of other body control codes
• Battery or power supply issues affecting the circuit
• Faulty connectors or terminals in the circuit

Common Troubleshooting Steps

The OBD-II code B1206 refers to a problem with the EIC (Electronic Ignition Control) Switch-1 Assembly Circuit, indicating that there is an open circuit. Here are some common troubleshooting steps to diagnose and potentially resolve this issue:

• Check the Vehicle’s Manual: Refer to the vehicle’s service manual for specific information related to the B1206 code, including wiring diagrams and component locations.
• Visual Inspection:
• Inspect the wiring and connectors associated with the EIC switch. Look for any signs of damage, corrosion, or loose connections.
• Check for any frayed wires or broken connectors that could cause an open circuit.
• Test the EIC Switch:
• If accessible, test the EIC switch for continuity using a multimeter. Ensure that it operates correctly when activated.
• If the switch is faulty, replace it.
• Check for Shorts or Opens:
• Use a multimeter to check for continuity in the wiring harness leading to the EIC switch. Look for any breaks or shorts in the circuit.
• If you find an open circuit, trace the wiring back to locate the break.
• Inspect Related Components:
• Check any related components that may affect the EIC switch operation, such as relays or fuses. Ensure they are functioning properly.
• 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:
• After performing any repairs, clear the trouble 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 the above steps, it may be necessary to consult a professional mechanic or technician who has experience with your specific vehicle make and model. By following these steps, you should be able to identify and resolve the issue related to the B1206 OBD-II code.