B1722 – Seat Driver Rearward Switch Circuit Open

The ODBII code B1722 indicates that there is an open circuit in the driver rearward seat switch, meaning the switch is not functioning properly or is disconnected, preventing the seat from moving rearward.

The severity of ODBII code B1722 is moderate.

Common Causes For: B1721 Seat Driver Rearward Switch Circuit Failure

• Faulty driver rearward switch
• Open circuit in the wiring harness
• Poor connection or corroded terminals
• Faulty seat control module
• Damaged or frayed wires
• Malfunctioning power supply to the switch

Common misdiagnosis for B1722 Seat Driver Rearward Switch Circuit Open

• Faulty seat switch
• Wiring issues or shorts
• Malfunctioning body control module (BCM)
• Defective seat motor
• Poor ground connection
• Incorrectly installed or damaged seat assembly
• Faulty connectors or terminals

Common Troubleshooting Steps

The OBD-II code B1722 indicates a problem with the seat driver rearward switch circuit, specifically that the circuit is open. This can be caused by various issues, including wiring problems, switch malfunctions, or issues with the seat control module. Here are some common troubleshooting steps to diagnose and resolve the issue:

• Visual Inspection: **Check Wiring and Connectors: Inspect the wiring harness and connectors associated with the seat switch for any signs of damage, corrosion, or loose connections.
• **Look for Shorts or Breaks: Look for any frayed wires or broken connections that could cause an open circuit.
• Test the Switch: **Switch Functionality: Use a multimeter to test the seat driver rearward switch. Check for continuity when the switch is activated. If the switch is faulty, it may need to be replaced.
• **Check for Ground: Ensure that the switch is properly grounded. A poor ground connection can lead to an open circuit.
• Inspect the Seat Control Module: **Module Functionality: If the switch and wiring are intact, the issue may lie within the seat control module. Check for any fault codes in the module using a scan tool.
• **Reprogram or Reset: Sometimes, reprogramming or resetting the module can resolve communication issues.
• Check for Related Codes: **Scan for Additional Codes: Use an OBD-II scanner to check for any other related trouble codes that may provide more context to the issue.
• Perform a Continuity Test: **Test Circuit Continuity: With the vehicle off, perform a continuity test on the circuit from the switch to the control module. This will help identify if there is a break in the circuit.
• Inspect Fuses: **Check Fuses: Inspect any fuses related to the seat control system. A blown fuse can interrupt the circuit and cause the code to trigger.
• Consult Wiring Diagrams: **Refer to Service Manual: Use the vehicle’s service manual to refer to wiring diagrams for the seat control system. This can help identify the correct pinouts and circuit paths.
• Test with a Scan Tool: **Live Data Monitoring: If available, use a scan tool to monitor live data while operating the seat switch. This can help determine if the signal is being sent and received correctly.
• Repair or Replace Components: **Replace Faulty Parts: If any faulty components are identified (switch, wiring, or module), replace them as necessary.
• Clear Codes and Test Drive: **Clear the Code: After repairs, clear the trouble codes and take the vehicle for a test drive to see if the code returns.1
• Seek Professional Help: **Consult a Professional: If the issue persists after performing these steps, it may be best to consult a professional mechanic or technician for further diagnosis. By following these troubleshooting steps, you should be able to identify and resolve the issue related to the B1722 code.