B1537 — Memory 2 Switch Circuit Short To Battery #

The description of this Diagnostic Trouble Code (DTC) may differ depending on the vehicle manufacturer (OEM).

• Memory 2 Switch Circuit Short To Battery (Generic, Chrysler, Ford, GM)
• Seat Memory Switch 2 Circuit High (Toyota, Lexus)
• Power Seat Memory Switch 2 Circuit Shorted High (Honda, Acura)

Summary of code B1537 #

The B1537 code is an OBD-II Body (B) code that indicates the memory switch circuit for the second position (Memory 2) in a power seat or similar memory feature is experiencing a short to battery voltage. In practical terms, this means the memory circuit is detecting a higher voltage than expected, usually due to a wiring fault. This circuit allows the driver to save and recall seat or mirror positions at the touch of a button. When a short to battery occurs, the system may be unable to store or retrieve these memory positions, and could potentially cause further electrical issues if left unresolved. This code does not typically affect engine performance but can impact comfort and convenience features.

Common symptoms for DTC B1537 #

A short to battery in the Memory 2 Switch Circuit most often results in failed memory seat operations, but can sometimes cause additional electrical anomalies depending on the vehicle’s design. Drivers may notice one or more of the following symptoms:

• Memory feature for seat or mirrors does not save or recall position 2
• Memory buttons unresponsive, especially button 2
• Unexpected movement or lack of movement in seat/mirrors when using memory
• Intermittent or abnormal electrical behavior in other seat controls
• Illuminated airbag/SRS or body warning lights (rare, but possible)

Most likely causes for B1537 #

The root of a B1537 DTC is almost always electrical, with certain causes being more prevalent. Here is the ranking by frequency:

1. Damaged or chafed wiring harness to the seat/memory switch (insulation worn, wire exposed to power)
2. Faulty Memory 2 switch (internal short or corrosion)
3. Connector issues (loose, corroded, or shorted terminals at the seat switch or control module)
4. Defective seat memory control module
5. Incorrect or aftermarket modifications to seat wiring (non-OEM remote starters or seat heaters, etc.)

Step-by-step diagnostic for B1537 #

A methodical approach is key to accurately diagnosing a B1537 code. Use the following steps to ensure nothing is missed:

• Read all stored and pending DTCs with a scan tool and note freeze frame data.
• Visually inspect the seat memory switch area and wiring harness for obvious damage or exposed wires.
• Disconnect the seat memory switch and inspect the connector for corrosion or bent pins.
• With the switch disconnected, check for battery voltage present on the Memory 2 circuit using a digital multimeter (should not be present).
• Check for continuity to ground and other circuits to ensure no shorts exist.
• If wiring is intact, swap the memory switch with a known good one (if possible) and re-test.
• If the code persists, inspect the control module and related harness for damage or replace the module as needed.
• Clear the code and check if it returns after repairing or replacing components.

Possible repairs for B1537 #

Repairs for B1537 depend directly on the cause identified during diagnosis. Address issues in this order:

• Repair or replace damaged seat wiring harness and secure to prevent future abrasion
• Replace faulty Memory 2 switch (OEM part recommended)
• Clean and tighten all electrical connectors at the seat, switch, and control module
• Replace a defective memory seat control module
• Remove or correct any non-OEM wiring modifications that may have caused the short

Is it safe to drive with code B1537? #

Yes, you can generally continue driving with a B1537 code, as it does not affect the core safety or drivability of your vehicle. However, prolonged operation with a shorted circuit may risk further electrical damage, particularly if the short worsens and affects related systems. For comfort, convenience, and to avoid future electrical issues, it’s best to address this code promptly.

Vehicles most affected by B1537 #

While many modern vehicles with memory seat functions can experience this DTC, it is most frequently reported in:

• Ford (F-150, Explorer, Edge)
• General Motors (Chevrolet Tahoe, GMC Yukon, Cadillac Escalade)
• Chrysler/Dodge/Jeep (300, Grand Cherokee, Ram)
• Toyota/Lexus (Camry, Avalon, RX350)
• Honda/Acura (Accord, MDX, TLX)

Common mistakes & best practices for B1537 #

Misdiagnosing a B1537 code can lead to wasted time and unnecessary part replacements. To avoid the most frequent pitfalls, keep these tips in mind:

• Do not replace the memory seat module before confirming wiring and switch integrity
• Always inspect the entire wiring harness from switch to module for chafing or pinching
• Don’t overlook connector corrosion or loose terminals
• Verify that any aftermarket device installations (remote starters, seat heaters) are not interfering
• Clear the code and recheck after each repair step to confirm the root cause is resolved

Quick FAQ for B1537 #

Here are some fast answers to the most common questions about B1537:

• Can this code drain my battery?
  If the short is significant and continuous, it could cause a minor battery drain, but this is rare. Most often, the issue is limited to the memory seat function.
• Will replacing the seat fix the code?
  Not necessarily. Replacing the seat may not resolve the issue if the fault is in the switch, harness, or control module. Always diagnose the exact cause before replacing major components.