B1527 – Memory Set Switch Circuit Failure

The ODBII code B1527 indicates a malfunction in the memory set switch circuit, which is responsible for controlling the memory settings for features like seat positions or mirrors in a vehicle.

The severity of ODBII code B1527 is generally considered moderate.

Common Causes For: B1526 Keyless Entry Circuit Short To Ground

• Faulty memory seat switch
• Damaged wiring or connectors in the circuit
• Short circuit in the memory switch circuit
• Open circuit in the memory switch circuit
• Malfunctioning body control module (BCM)
• Corrosion or poor connections at the switch or module
• Software issues or glitches in the vehicle’s control system

Common misdiagnosis for B1527 Memory Set Switch Circuit Failure

• Faulty memory seat module
• Wiring issues or shorts in the circuit
• Defective seat position sensors
• Malfunctioning body control module (BCM)
• Incorrectly calibrated or programmed modules
• Issues with the power supply to the seat memory system
• Faulty switches or connectors related to the memory seat function

Common Troubleshooting Steps

The OBD-II code B1527 indicates a “Memory Set Switch Circuit Failure.” This code is typically related to the vehicle’s memory seat function, which allows the driver to save and recall seat positions. When troubleshooting this code, you can follow these common steps:

• Check for Additional Codes: Use an OBD-II scanner to check for any other related trouble codes. This can provide more context and help identify if there are other issues present.
• Inspect the Memory Set Switch:
• Check the memory set switch for physical damage or wear.
• Ensure that the switch is functioning properly by testing it with a multimeter to see if it is sending the correct signals when pressed.
• Examine Wiring and Connectors:
• Inspect the wiring harness and connectors associated with the memory set switch for any signs of damage, corrosion, or loose connections.
• Look for frayed wires or broken connectors that could interrupt the circuit.
• Check the Seat Control Module:
• The memory seat function is often controlled by a seat control module. Check the module for any faults or issues.
• Ensure that the module is receiving power and ground as required.
• Test the Memory Function:
• If the vehicle has multiple memory settings, test each one to see if they are functioning correctly.
• Try resetting the memory settings according to the vehicle’s owner manual.
• Inspect the Power Supply:
• Verify that the memory seat system is receiving the correct voltage. Use a multimeter to check the power supply to the memory set switch and the seat control module.
• Check for Short Circuits:
• Look for any short circuits in the wiring that could cause the memory set switch to fail. This may require a more in-depth inspection of the wiring harness.
• Clear the Code and Test Drive:
• After performing the above checks and repairs, clear the trouble code using the OBD-II scanner.
• Take the vehicle for a test drive to see if the code returns.
• Consult the Service Manual:
• If the issue persists, consult the vehicle’s service manual for specific diagnostic procedures related to the memory seat system.
• Seek Professional Help:
• If you are unable to resolve the issue, consider taking the vehicle to a qualified technician or dealership for further diagnosis and repair. By following these steps, you should be able to identify and resolve the issue related to the B1527 code.