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B code body Medium severity

B1535 Memory 2 Switch Circuit Failure

The OBD2 code B1535 Memory 2 Switch Circuit Failure indicates a malfunction in the switch circuit related to the memory function of a vehicle's seat or mirror adjustment system

Definition

The OBD2 code B1535 Memory 2 Switch Circuit Failure indicates a malfunction in the switch circuit related to the memory function of a vehicle's seat or mirror adjustment system

Common causes

  • Faulty memory seat switch
  • Damaged wiring or connectors
  • Short circuit in the switch circuit
  • Open circuit in the switch circuit
  • Faulty memory seat module
  • Corrosion or poor connections in the circuit
  • Malfunctioning body control module (BCM)

Common misdiagnoses

  • Faulty body control module (BCM)
  • Wiring issues or shorts in the circuit
  • Defective switch or button
  • Incorrectly diagnosed window motor or regulator problems
  • Misinterpretation of related codes or symptoms
  • Battery or power supply issues affecting the circuit
  • Faulty connectors or terminals in the circuit

Troubleshooting steps

  1. 1. 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 multiple issues

  2. 2. Inspect the Wiring and Connectors

    Visually inspect the wiring and connectors associated with the memory seat switch and the BCM. Look for signs of damage, corrosion, or loose connections

  3. 3. Pay special attention to the wiring harnesses that connect to the memory seat switch and the BCM

  4. 4. Test the Memory Seat Switch

    Use a multimeter to test the memory seat switch for proper operation. Check for continuity and ensure that the switch is functioning correctly

  5. 5. If the switch is faulty, it may need to be replaced

  6. 6. Check the Body Control Module (BCM)

    Inspect the BCM for any signs of damage or corrosion. If the BCM is malfunctioning, it may need to be reprogrammed or replaced

  7. 7. Ensure that the BCM is receiving proper power and ground signals

  8. 8. Inspect the Memory Seat Functionality

    Test the memory seat function to see if it operates correctly. If the seat does not move or respond to the memory settings, this could indicate a problem with the seat motors or the BCM

  9. 9. Check for Short Circuits

    Use a multimeter to check for short circuits in the wiring related to the memory seat function. A short circuit can cause the B1535 code to trigger

  10. 10. 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 reappears

  11. 11. Consult the Vehicle’s Service Manual

    Refer to the specific service manual for your vehicle make and model for detailed wiring diagrams and troubleshooting procedures related to the memory seat system

  12. 12. Seek Professional Help

    If the issue persists after performing these steps, it may be necessary to consult a professional mechanic or technician who has experience with your vehicle's electrical systems. By following these troubleshooting steps, you should be able to identify and resolve the issue related to the B1535 code