B1538 – OBD-II DTC

OBD-II DTC B1538 – Memory 2 Switch Circuit Short To Ground

DTC B1538 meaning

DTC B1538 refers to a diagnostic trouble code indicating a problem with the Memory 2 switch circuit, specifically a short to ground condition. This code is typically associated with the vehicle’s body control module (BCM) and indicates that the BCM has detected an abnormal voltage level in the Memory 2 switch circuit, which is responsible for controlling certain features such as seat positioning or mirror adjustments.

DTC B1538 symptoms

Common symptoms associated with DTC B1538 may include:

• Inoperable Memory 2 features (e.g., seat or mirror adjustments)
• Warning lights on the dashboard
• Intermittent electrical issues in related systems
• Possible malfunction of other body control functions

DTC B1538 causes

The causes of DTC B1538 can vary, but typical reasons include:

• Short circuit in the Memory 2 switch wiring
• Faulty Memory 2 switch
• Corroded or damaged connectors
• Issues with the body control module (BCM)

DTC B1538 seriousness

DTC B1538 is considered a moderate issue. While it may not immediately affect the vehicle’s drivability, it can lead to the failure of important features such as seat and mirror adjustments, which can impact driver comfort and safety. Ignoring this code may result in further electrical issues or damage to the BCM over time.

How to diagnose DTC B1538

To diagnose DTC B1538, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the DTC.
2. Inspect the Memory 2 switch and its wiring for visible damage or corrosion.
3. Check the connectors for proper seating and signs of wear.
4. Test the Memory 2 switch for continuity and proper operation.
5. Examine the BCM for any fault codes or issues.
6. Perform a visual inspection of the wiring harness for shorts to ground.

How to fix DTC B1538 step-by-step instructions

To fix DTC B1538, follow these steps:

1. Disconnect the vehicle’s battery to ensure safety.
2. Inspect and repair any damaged wiring or connectors related to the Memory 2 switch.
3. Replace the Memory 2 switch if it is found to be faulty.
4. Reconnect all connectors and ensure they are secure.
5. Reconnect the battery and clear the DTC using an OBD-II scanner.
6. Test the Memory 2 features to ensure they are functioning correctly.

How to erase DTC B1538

To erase DTC B1538, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Turn on the ignition without starting the engine.
3. Navigate to the DTC menu on the scanner.
4. Select the option to clear or erase trouble codes.
5. Confirm the action and wait for the scanner to complete the process.
6. Disconnect the scanner and start the vehicle to ensure the code does not return.

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